./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/test-0217.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_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/test-0217.i -s /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/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 ec43a80d2499e410cf4a8d76208ab9ab3e6ffdfd ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: UnsupportedOperationException: alternation not yet supported: (forall ((v_append_one_~list.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32)) (v_arrayElimCell_89 (_ BitVec 32))) (exists ((v_arrayElimCell_85 (_ BitVec 32))) (let ((.cse2 (bvmul ~unnamed1~0~LIST_BEG (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse1 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2))) (or (not (bvsle (bvadd create_item_~cursor.offset (_ bv4 32)) v_arrayElimCell_88)) (and (= create_item_~cursor.base |create_item_#in~cursor.base|) (not (= v_arrayElimCell_89 v_arrayElimCell_88))) (and (not (bvsle .cse0 v_arrayElimCell_85)) (bvsle (bvadd |create_item_#in~cursor.offset| (_ bv4 32)) v_arrayElimCell_85)) (not (bvsle .cse1 .cse0)) (bvsle .cse0 v_arrayElimCell_89) (not (bvsle (_ bv0 32) .cse1))))))) --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 05:30:50,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 05:30:50,749 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 05:30:50,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 05:30:50,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 05:30:50,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 05:30:50,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 05:30:50,767 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 05:30:50,769 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 05:30:50,770 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 05:30:50,771 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 05:30:50,773 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 05:30:50,773 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 05:30:50,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 05:30:50,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 05:30:50,777 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 05:30:50,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 05:30:50,779 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 05:30:50,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 05:30:50,783 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 05:30:50,785 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 05:30:50,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 05:30:50,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 05:30:50,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 05:30:50,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 05:30:50,793 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 05:30:50,793 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 05:30:50,794 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 05:30:50,795 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 05:30:50,796 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 05:30:50,796 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 05:30:50,797 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 05:30:50,798 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 05:30:50,799 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 05:30:50,800 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 05:30:50,800 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 05:30:50,801 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 05:30:50,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 05:30:50,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 05:30:50,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 05:30:50,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 05:30:50,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 05:30:50,819 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 05:30:50,820 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 05:30:50,821 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 05:30:50,821 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 05:30:50,821 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 05:30:50,822 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 05:30:50,822 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 05:30:50,822 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 05:30:50,822 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 05:30:50,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 05:30:50,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 05:30:50,823 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 05:30:50,823 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 05:30:50,824 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 05:30:50,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 05:30:50,824 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 05:30:50,824 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 05:30:50,825 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 05:30:50,825 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 05:30:50,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 05:30:50,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 05:30:50,826 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 05:30:50,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 05:30:50,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:30:50,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 05:30:50,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 05:30:50,827 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 05:30:50,827 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 05:30:50,828 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 05:30:50,828 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_ee75a4b0-debf-46cf-981d-91d981e432a8/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 -> ec43a80d2499e410cf4a8d76208ab9ab3e6ffdfd [2019-11-20 05:30:50,992 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 05:30:51,009 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 05:30:51,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 05:30:51,017 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 05:30:51,018 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 05:30:51,019 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/../../sv-benchmarks/c/memsafety/test-0217.i [2019-11-20 05:30:51,098 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/data/7c03f4bbe/00dc70b1b9fc4dfaa16c61471a272d54/FLAG16a1179e6 [2019-11-20 05:30:51,692 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 05:30:51,693 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/sv-benchmarks/c/memsafety/test-0217.i [2019-11-20 05:30:51,709 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/data/7c03f4bbe/00dc70b1b9fc4dfaa16c61471a272d54/FLAG16a1179e6 [2019-11-20 05:30:51,920 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/data/7c03f4bbe/00dc70b1b9fc4dfaa16c61471a272d54 [2019-11-20 05:30:51,923 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 05:30:51,924 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 05:30:51,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 05:30:51,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 05:30:51,929 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 05:30:51,930 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:30:51" (1/1) ... [2019-11-20 05:30:51,932 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f4befb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:51, skipping insertion in model container [2019-11-20 05:30:51,932 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:30:51" (1/1) ... [2019-11-20 05:30:51,940 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 05:30:51,993 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 05:30:52,552 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:30:52,581 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 05:30:52,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 05:30:52,811 INFO L192 MainTranslator]: Completed translation [2019-11-20 05:30:52,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52 WrapperNode [2019-11-20 05:30:52,812 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 05:30:52,813 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 05:30:52,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 05:30:52,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 05:30:52,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,874 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... [2019-11-20 05:30:52,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 05:30:52,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 05:30:52,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 05:30:52,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 05:30:52,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 05:30:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 05:30:53,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 05:30:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 05:30:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 05:30:53,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2019-11-20 05:30:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2019-11-20 05:30:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2019-11-20 05:30:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure is_empty [2019-11-20 05:30:53,068 INFO L138 BoogieDeclarations]: Found implementation of procedure create_item [2019-11-20 05:30:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure append_one [2019-11-20 05:30:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_one [2019-11-20 05:30:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure rand_end_point [2019-11-20 05:30:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 05:30:53,070 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-11-20 05:30:53,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 05:30:53,070 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 05:30:53,070 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 05:30:53,070 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 05:30:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 05:30:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 05:30:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 05:30:53,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 05:30:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 05:30:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 05:30:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 05:30:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 05:30:53,072 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 05:30:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 05:30:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 05:30:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 05:30:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 05:30:53,073 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 05:30:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 05:30:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2019-11-20 05:30:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2019-11-20 05:30:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2019-11-20 05:30:53,074 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 05:30:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 05:30:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 05:30:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 05:30:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 05:30:53,075 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 05:30:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 05:30:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 05:30:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 05:30:53,076 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 05:30:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 05:30:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 05:30:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 05:30:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 05:30:53,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 05:30:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 05:30:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 05:30:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 05:30:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 05:30:53,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 05:30:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 05:30:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 05:30:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 05:30:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 05:30:53,079 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 05:30:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 05:30:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 05:30:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 05:30:53,080 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 05:30:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 05:30:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 05:30:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 05:30:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 05:30:53,081 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 05:30:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 05:30:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 05:30:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 05:30:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 05:30:53,082 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 05:30:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 05:30:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 05:30:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 05:30:53,083 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 05:30:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 05:30:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 05:30:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 05:30:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 05:30:53,084 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 05:30:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 05:30:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 05:30:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 05:30:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 05:30:53,085 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 05:30:53,086 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 05:30:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 05:30:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 05:30:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 05:30:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 05:30:53,087 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 05:30:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 05:30:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 05:30:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 05:30:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 05:30:53,088 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 05:30:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 05:30:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 05:30:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 05:30:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 05:30:53,089 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 05:30:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 05:30:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 05:30:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 05:30:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 05:30:53,090 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 05:30:53,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 05:30:53,091 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 05:30:53,091 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 05:30:53,091 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 05:30:53,091 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 05:30:53,092 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 05:30:53,092 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 05:30:53,092 INFO L130 BoogieDeclarations]: Found specification of procedure memcpy [2019-11-20 05:30:53,092 INFO L130 BoogieDeclarations]: Found specification of procedure memmove [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure memccpy [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure memchr [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure strcpy [2019-11-20 05:30:53,093 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2019-11-20 05:30:53,094 INFO L130 BoogieDeclarations]: Found specification of procedure strcat [2019-11-20 05:30:53,094 INFO L130 BoogieDeclarations]: Found specification of procedure strncat [2019-11-20 05:30:53,094 INFO L130 BoogieDeclarations]: Found specification of procedure strcmp [2019-11-20 05:30:53,094 INFO L130 BoogieDeclarations]: Found specification of procedure strncmp [2019-11-20 05:30:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll [2019-11-20 05:30:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm [2019-11-20 05:30:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure strcoll_l [2019-11-20 05:30:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure strxfrm_l [2019-11-20 05:30:53,095 INFO L130 BoogieDeclarations]: Found specification of procedure strdup [2019-11-20 05:30:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure strndup [2019-11-20 05:30:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure strchr [2019-11-20 05:30:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2019-11-20 05:30:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure strcspn [2019-11-20 05:30:53,096 INFO L130 BoogieDeclarations]: Found specification of procedure strspn [2019-11-20 05:30:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure strpbrk [2019-11-20 05:30:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure strstr [2019-11-20 05:30:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure strtok [2019-11-20 05:30:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure __strtok_r [2019-11-20 05:30:53,097 INFO L130 BoogieDeclarations]: Found specification of procedure strtok_r [2019-11-20 05:30:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure strlen [2019-11-20 05:30:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure strnlen [2019-11-20 05:30:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure strerror [2019-11-20 05:30:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_r [2019-11-20 05:30:53,098 INFO L130 BoogieDeclarations]: Found specification of procedure strerror_l [2019-11-20 05:30:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure bcmp [2019-11-20 05:30:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure bcopy [2019-11-20 05:30:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure bzero [2019-11-20 05:30:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure index [2019-11-20 05:30:53,099 INFO L130 BoogieDeclarations]: Found specification of procedure rindex [2019-11-20 05:30:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ffs [2019-11-20 05:30:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ffsl [2019-11-20 05:30:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure ffsll [2019-11-20 05:30:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp [2019-11-20 05:30:53,100 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp [2019-11-20 05:30:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure strcasecmp_l [2019-11-20 05:30:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure strncasecmp_l [2019-11-20 05:30:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure explicit_bzero [2019-11-20 05:30:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure strsep [2019-11-20 05:30:53,101 INFO L130 BoogieDeclarations]: Found specification of procedure strsignal [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure __stpcpy [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure stpcpy [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure __stpncpy [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure stpncpy [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-20 05:30:53,102 INFO L130 BoogieDeclarations]: Found specification of procedure is_empty [2019-11-20 05:30:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 05:30:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 05:30:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure create_item [2019-11-20 05:30:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 05:30:53,103 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 05:30:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2019-11-20 05:30:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure append_one [2019-11-20 05:30:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure remove_one [2019-11-20 05:30:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-11-20 05:30:53,104 INFO L130 BoogieDeclarations]: Found specification of procedure rand_end_point [2019-11-20 05:30:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 05:30:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 05:30:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-20 05:30:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-20 05:30:53,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 05:30:53,106 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2019-11-20 05:30:54,258 WARN L736 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2019-11-20 05:30:54,786 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 05:30:54,786 INFO L285 CfgBuilder]: Removed 5 assume(true) statements. [2019-11-20 05:30:54,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:30:54 BoogieIcfgContainer [2019-11-20 05:30:54,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 05:30:54,789 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 05:30:54,789 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 05:30:54,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 05:30:54,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:30:51" (1/3) ... [2019-11-20 05:30:54,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4400aa6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:30:54, skipping insertion in model container [2019-11-20 05:30:54,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:30:52" (2/3) ... [2019-11-20 05:30:54,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4400aa6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:30:54, skipping insertion in model container [2019-11-20 05:30:54,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:30:54" (3/3) ... [2019-11-20 05:30:54,796 INFO L109 eAbstractionObserver]: Analyzing ICFG test-0217.i [2019-11-20 05:30:54,807 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 05:30:54,815 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 67 error locations. [2019-11-20 05:30:54,827 INFO L249 AbstractCegarLoop]: Starting to check reachability of 67 error locations. [2019-11-20 05:30:54,849 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 05:30:54,849 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 05:30:54,849 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 05:30:54,849 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 05:30:54,850 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 05:30:54,850 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 05:30:54,850 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 05:30:54,850 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 05:30:54,874 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states. [2019-11-20 05:30:54,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:30:54,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:30:54,883 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:30:54,884 INFO L410 AbstractCegarLoop]: === Iteration 1 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:30:54,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:30:54,890 INFO L82 PathProgramCache]: Analyzing trace with hash -439419761, now seen corresponding path program 1 times [2019-11-20 05:30:54,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:30:54,900 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1154238711] [2019-11-20 05:30:54,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:30:55,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:30:55,226 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 05:30:55,232 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:30:55,324 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:30:55,325 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:30:55,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:30:55,352 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 05:30:55,353 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:30:55,353 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:15 [2019-11-20 05:30:55,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:30:55,378 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:30:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:30:55,439 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1154238711] [2019-11-20 05:30:55,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:30:55,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 05:30:55,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222298595] [2019-11-20 05:30:55,450 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 05:30:55,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:30:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 05:30:55,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:30:55,470 INFO L87 Difference]: Start difference. First operand 185 states. Second operand 4 states. [2019-11-20 05:30:56,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:30:56,549 INFO L93 Difference]: Finished difference Result 372 states and 413 transitions. [2019-11-20 05:30:56,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 05:30:56,554 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2019-11-20 05:30:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:30:56,583 INFO L225 Difference]: With dead ends: 372 [2019-11-20 05:30:56,583 INFO L226 Difference]: Without dead ends: 363 [2019-11-20 05:30:56,585 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:30:56,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2019-11-20 05:30:56,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 253. [2019-11-20 05:30:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2019-11-20 05:30:56,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 326 transitions. [2019-11-20 05:30:56,666 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 326 transitions. Word has length 9 [2019-11-20 05:30:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:30:56,666 INFO L462 AbstractCegarLoop]: Abstraction has 253 states and 326 transitions. [2019-11-20 05:30:56,667 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 05:30:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 326 transitions. [2019-11-20 05:30:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-20 05:30:56,668 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:30:56,668 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:30:56,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:30:56,870 INFO L410 AbstractCegarLoop]: === Iteration 2 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:30:56,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:30:56,870 INFO L82 PathProgramCache]: Analyzing trace with hash -439419760, now seen corresponding path program 1 times [2019-11-20 05:30:56,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:30:56,871 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [882658186] [2019-11-20 05:30:56,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:30:57,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:30:57,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:30:57,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:30:57,198 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:30:57,198 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:30:57,205 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:30:57,205 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:30:57,206 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:30:57,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:30:57,246 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:30:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:30:57,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [882658186] [2019-11-20 05:30:57,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:30:57,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 05:30:57,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491611958] [2019-11-20 05:30:57,409 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:30:57,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:30:57,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:30:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:30:57,410 INFO L87 Difference]: Start difference. First operand 253 states and 326 transitions. Second operand 6 states. [2019-11-20 05:30:59,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:30:59,662 INFO L93 Difference]: Finished difference Result 659 states and 835 transitions. [2019-11-20 05:30:59,664 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:30:59,664 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2019-11-20 05:30:59,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:30:59,670 INFO L225 Difference]: With dead ends: 659 [2019-11-20 05:30:59,670 INFO L226 Difference]: Without dead ends: 659 [2019-11-20 05:30:59,672 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:30:59,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2019-11-20 05:30:59,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 507. [2019-11-20 05:30:59,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2019-11-20 05:30:59,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 767 transitions. [2019-11-20 05:30:59,753 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 767 transitions. Word has length 9 [2019-11-20 05:30:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:30:59,753 INFO L462 AbstractCegarLoop]: Abstraction has 507 states and 767 transitions. [2019-11-20 05:30:59,754 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:30:59,754 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 767 transitions. [2019-11-20 05:30:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:30:59,755 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:30:59,755 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:30:59,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:30:59,959 INFO L410 AbstractCegarLoop]: === Iteration 3 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:30:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:30:59,959 INFO L82 PathProgramCache]: Analyzing trace with hash 306374447, now seen corresponding path program 1 times [2019-11-20 05:30:59,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:30:59,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1610373128] [2019-11-20 05:30:59,960 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:00,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:31:00,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:00,293 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:00,301 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:00,303 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2019-11-20 05:31:00,304 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:00,318 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:00,321 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:00,321 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-11-20 05:31:00,322 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,333 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:00,333 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,333 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:7 [2019-11-20 05:31:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:00,368 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:00,446 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:00,459 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:00,465 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:31:00,466 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,471 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:00,473 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:31:00,473 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,476 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:00,476 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:31:00,476 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,477 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:31:00,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:00,491 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:00,511 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:00,512 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:00,513 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:31:00,514 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,518 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:31:00,519 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,520 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:00,520 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:31:00,521 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:00,521 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:31:00,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:00,523 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1610373128] [2019-11-20 05:31:00,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:00,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-11-20 05:31:00,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248561203] [2019-11-20 05:31:00,524 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:31:00,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:00,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:31:00,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:31:00,525 INFO L87 Difference]: Start difference. First operand 507 states and 767 transitions. Second operand 8 states. [2019-11-20 05:31:01,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:01,426 INFO L93 Difference]: Finished difference Result 645 states and 925 transitions. [2019-11-20 05:31:01,428 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:31:01,428 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-20 05:31:01,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:01,433 INFO L225 Difference]: With dead ends: 645 [2019-11-20 05:31:01,434 INFO L226 Difference]: Without dead ends: 645 [2019-11-20 05:31:01,434 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:31:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 645 states. [2019-11-20 05:31:01,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 645 to 554. [2019-11-20 05:31:01,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-20 05:31:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 846 transitions. [2019-11-20 05:31:01,468 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 846 transitions. Word has length 12 [2019-11-20 05:31:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:01,469 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 846 transitions. [2019-11-20 05:31:01,469 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:31:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 846 transitions. [2019-11-20 05:31:01,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-20 05:31:01,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:01,470 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:31:01,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:01,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:01,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:01,675 INFO L82 PathProgramCache]: Analyzing trace with hash 308221489, now seen corresponding path program 1 times [2019-11-20 05:31:01,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:01,676 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2033805198] [2019-11-20 05:31:01,676 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:01,925 INFO L255 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:31:01,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:01,994 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:02,000 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:02,001 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2019-11-20 05:31:02,001 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,010 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:02,012 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:02,015 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:02,015 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2019-11-20 05:31:02,016 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,025 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:02,026 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,026 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:33, output treesize:7 [2019-11-20 05:31:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:02,071 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:02,177 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:02,190 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:02,194 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:31:02,194 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,198 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:02,198 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:31:02,199 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,200 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:02,200 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:31:02,200 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,200 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:31:02,203 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:02,212 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:02,223 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:02,224 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:02,226 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:31:02,226 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,229 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:31:02,229 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,231 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:02,231 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:31:02,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:02,231 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:31:02,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:02,233 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2033805198] [2019-11-20 05:31:02,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:02,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2019-11-20 05:31:02,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667288858] [2019-11-20 05:31:02,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:31:02,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:02,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:31:02,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:31:02,235 INFO L87 Difference]: Start difference. First operand 554 states and 846 transitions. Second operand 8 states. [2019-11-20 05:31:03,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:03,057 INFO L93 Difference]: Finished difference Result 635 states and 914 transitions. [2019-11-20 05:31:03,059 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:31:03,059 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2019-11-20 05:31:03,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:03,065 INFO L225 Difference]: With dead ends: 635 [2019-11-20 05:31:03,065 INFO L226 Difference]: Without dead ends: 635 [2019-11-20 05:31:03,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:31:03,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2019-11-20 05:31:03,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 554. [2019-11-20 05:31:03,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 554 states. [2019-11-20 05:31:03,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 846 transitions. [2019-11-20 05:31:03,097 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 846 transitions. Word has length 12 [2019-11-20 05:31:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:03,098 INFO L462 AbstractCegarLoop]: Abstraction has 554 states and 846 transitions. [2019-11-20 05:31:03,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:31:03,098 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 846 transitions. [2019-11-20 05:31:03,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-20 05:31:03,099 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:03,099 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:31:03,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:03,302 INFO L410 AbstractCegarLoop]: === Iteration 5 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:03,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:03,303 INFO L82 PathProgramCache]: Analyzing trace with hash 907671927, now seen corresponding path program 1 times [2019-11-20 05:31:03,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:03,303 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [468702707] [2019-11-20 05:31:03,303 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:03,509 INFO L255 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-20 05:31:03,510 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:03,522 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:03,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [468702707] [2019-11-20 05:31:03,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:03,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 05:31:03,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761256467] [2019-11-20 05:31:03,531 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 05:31:03,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:03,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 05:31:03,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:31:03,532 INFO L87 Difference]: Start difference. First operand 554 states and 846 transitions. Second operand 3 states. [2019-11-20 05:31:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:03,950 INFO L93 Difference]: Finished difference Result 669 states and 1023 transitions. [2019-11-20 05:31:03,950 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:31:03,951 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-20 05:31:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:03,961 INFO L225 Difference]: With dead ends: 669 [2019-11-20 05:31:03,961 INFO L226 Difference]: Without dead ends: 662 [2019-11-20 05:31:03,961 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 05:31:03,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2019-11-20 05:31:03,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 575. [2019-11-20 05:31:03,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 575 states. [2019-11-20 05:31:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 869 transitions. [2019-11-20 05:31:03,986 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 869 transitions. Word has length 13 [2019-11-20 05:31:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:03,986 INFO L462 AbstractCegarLoop]: Abstraction has 575 states and 869 transitions. [2019-11-20 05:31:03,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 05:31:03,987 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 869 transitions. [2019-11-20 05:31:03,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 05:31:03,987 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:03,988 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:31:04,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:04,192 INFO L410 AbstractCegarLoop]: === Iteration 6 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:04,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:04,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1583239841, now seen corresponding path program 1 times [2019-11-20 05:31:04,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:04,192 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2045420025] [2019-11-20 05:31:04,192 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:04,424 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-20 05:31:04,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:04,457 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:04,457 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:31:04,458 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:04,495 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 05:31:04,496 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:04,496 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:15 [2019-11-20 05:31:04,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:04,601 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:04,704 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2045420025] [2019-11-20 05:31:04,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:04,705 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 05:31:04,705 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495355711] [2019-11-20 05:31:04,706 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:31:04,706 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:04,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:31:04,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:31:04,707 INFO L87 Difference]: Start difference. First operand 575 states and 869 transitions. Second operand 12 states. [2019-11-20 05:31:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:07,204 INFO L93 Difference]: Finished difference Result 717 states and 999 transitions. [2019-11-20 05:31:07,204 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:31:07,204 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 05:31:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:07,210 INFO L225 Difference]: With dead ends: 717 [2019-11-20 05:31:07,210 INFO L226 Difference]: Without dead ends: 717 [2019-11-20 05:31:07,211 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:31:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2019-11-20 05:31:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 572. [2019-11-20 05:31:07,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 572 states. [2019-11-20 05:31:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 847 transitions. [2019-11-20 05:31:07,237 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 847 transitions. Word has length 17 [2019-11-20 05:31:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:07,237 INFO L462 AbstractCegarLoop]: Abstraction has 572 states and 847 transitions. [2019-11-20 05:31:07,237 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:31:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 847 transitions. [2019-11-20 05:31:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 05:31:07,239 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:07,239 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:31:07,443 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:07,447 INFO L410 AbstractCegarLoop]: === Iteration 7 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:07,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1583239842, now seen corresponding path program 1 times [2019-11-20 05:31:07,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:07,448 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1406505196] [2019-11-20 05:31:07,449 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:07,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:07,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:31:07,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:07,701 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:31:07,701 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:07,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:07,707 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:07,707 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:31:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:07,796 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:08,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:08,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1406505196] [2019-11-20 05:31:08,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:08,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 05:31:08,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586993192] [2019-11-20 05:31:08,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:31:08,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:08,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:31:08,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:31:08,207 INFO L87 Difference]: Start difference. First operand 572 states and 847 transitions. Second operand 12 states. [2019-11-20 05:31:10,909 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2019-11-20 05:31:12,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:12,753 INFO L93 Difference]: Finished difference Result 683 states and 876 transitions. [2019-11-20 05:31:12,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:31:12,754 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2019-11-20 05:31:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:12,759 INFO L225 Difference]: With dead ends: 683 [2019-11-20 05:31:12,759 INFO L226 Difference]: Without dead ends: 683 [2019-11-20 05:31:12,760 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:31:12,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2019-11-20 05:31:12,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 571. [2019-11-20 05:31:12,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2019-11-20 05:31:12,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 824 transitions. [2019-11-20 05:31:12,785 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 824 transitions. Word has length 17 [2019-11-20 05:31:12,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:12,785 INFO L462 AbstractCegarLoop]: Abstraction has 571 states and 824 transitions. [2019-11-20 05:31:12,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:31:12,786 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 824 transitions. [2019-11-20 05:31:12,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 05:31:12,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:12,787 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] [2019-11-20 05:31:12,991 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:12,991 INFO L410 AbstractCegarLoop]: === Iteration 8 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:12,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:12,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1169858834, now seen corresponding path program 1 times [2019-11-20 05:31:12,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:12,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [347196506] [2019-11-20 05:31:12,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:13,235 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 05:31:13,236 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:13,251 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:13,252 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:31:13,252 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:13,270 INFO L567 ElimStorePlain]: treesize reduction 10, result has 60.0 percent of original size [2019-11-20 05:31:13,270 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:13,270 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:15 [2019-11-20 05:31:13,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,428 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:13,429 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 42 [2019-11-20 05:31:13,429 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:13,577 WARN L191 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 27 [2019-11-20 05:31:13,578 INFO L343 Elim1Store]: treesize reduction 8, result has 87.3 percent of original size [2019-11-20 05:31:13,578 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 69 [2019-11-20 05:31:13,580 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:13,676 INFO L567 ElimStorePlain]: treesize reduction 30, result has 63.0 percent of original size [2019-11-20 05:31:13,677 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,679 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 05:31:13,679 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:43, output treesize:51 [2019-11-20 05:31:13,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,680 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,681 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,718 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,736 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,753 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,769 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:13,802 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:14,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347196506] [2019-11-20 05:31:14,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:14,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 05:31:14,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924766681] [2019-11-20 05:31:14,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:31:14,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:31:14,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:31:14,039 INFO L87 Difference]: Start difference. First operand 571 states and 824 transitions. Second operand 12 states. [2019-11-20 05:31:16,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:16,894 INFO L93 Difference]: Finished difference Result 774 states and 1047 transitions. [2019-11-20 05:31:16,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 05:31:16,895 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-20 05:31:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:16,900 INFO L225 Difference]: With dead ends: 774 [2019-11-20 05:31:16,900 INFO L226 Difference]: Without dead ends: 774 [2019-11-20 05:31:16,901 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2019-11-20 05:31:16,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2019-11-20 05:31:16,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 569. [2019-11-20 05:31:16,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2019-11-20 05:31:16,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 812 transitions. [2019-11-20 05:31:16,923 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 812 transitions. Word has length 20 [2019-11-20 05:31:16,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:16,923 INFO L462 AbstractCegarLoop]: Abstraction has 569 states and 812 transitions. [2019-11-20 05:31:16,924 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:31:16,924 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 812 transitions. [2019-11-20 05:31:16,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 05:31:16,925 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:16,925 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] [2019-11-20 05:31:17,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:17,130 INFO L410 AbstractCegarLoop]: === Iteration 9 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:17,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:17,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1169858833, now seen corresponding path program 1 times [2019-11-20 05:31:17,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:17,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [462965912] [2019-11-20 05:31:17,131 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:17,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:17,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 05:31:17,376 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:17,387 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:31:17,388 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,398 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:17,423 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:17,423 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2019-11-20 05:31:17,423 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,460 INFO L567 ElimStorePlain]: treesize reduction 10, result has 69.7 percent of original size [2019-11-20 05:31:17,461 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,461 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:23 [2019-11-20 05:31:17,628 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:31:17,635 INFO L392 ElimStorePlain]: Different costs {1=[|v_#length_114|], 3=[|v_#valid_137|]} [2019-11-20 05:31:17,641 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:17,647 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2019-11-20 05:31:17,647 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,655 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:17,658 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 34 [2019-11-20 05:31:17,659 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,700 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:17,704 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:17,706 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2019-11-20 05:31:17,707 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,711 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:17,715 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:17,720 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:17,720 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2019-11-20 05:31:17,721 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:17,743 INFO L567 ElimStorePlain]: treesize reduction 20, result has 44.4 percent of original size [2019-11-20 05:31:17,743 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:31:17,744 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:63, output treesize:16 [2019-11-20 05:31:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:17,778 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:31:17,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:31:18,687 WARN L191 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2019-11-20 05:31:19,189 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 24 [2019-11-20 05:31:19,825 WARN L191 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 47 [2019-11-20 05:31:19,829 WARN L138 XnfTransformerHelper]: expecting exponential blowup for input size 6 [2019-11-20 05:31:19,911 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:19,912 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:19,914 INFO L567 ElimStorePlain]: treesize reduction 34, result has 2.9 percent of original size [2019-11-20 05:31:19,914 INFO L464 ElimStorePlain]: Eliminatee |v_#valid_143| vanished before elimination [2019-11-20 05:31:19,915 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:19,915 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:1 [2019-11-20 05:31:19,934 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:19,939 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:19,944 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:31:19,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:19,946 INFO L567 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2019-11-20 05:31:19,946 INFO L464 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2019-11-20 05:31:19,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:19,946 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:1 [2019-11-20 05:31:19,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:19,953 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [462965912] [2019-11-20 05:31:19,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:31:19,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 15 [2019-11-20 05:31:19,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771991376] [2019-11-20 05:31:19,955 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:31:19,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:31:19,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:31:19,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:31:19,956 INFO L87 Difference]: Start difference. First operand 569 states and 812 transitions. Second operand 16 states. [2019-11-20 05:31:20,498 WARN L191 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 43 [2019-11-20 05:31:20,800 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 05:31:21,368 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-20 05:31:22,106 WARN L191 SmtUtils]: Spent 338.00 ms on a formula simplification that was a NOOP. DAG size: 61 [2019-11-20 05:31:22,497 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2019-11-20 05:31:22,981 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-20 05:31:26,462 WARN L191 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-11-20 05:31:31,274 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 05:31:43,529 WARN L191 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 47 [2019-11-20 05:31:44,026 WARN L191 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 56 [2019-11-20 05:31:44,821 WARN L191 SmtUtils]: Spent 456.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2019-11-20 05:31:45,196 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 48 [2019-11-20 05:31:45,752 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 55 [2019-11-20 05:31:55,578 WARN L191 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2019-11-20 05:31:58,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:31:58,509 INFO L93 Difference]: Finished difference Result 1478 states and 2021 transitions. [2019-11-20 05:31:58,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-20 05:31:58,510 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2019-11-20 05:31:58,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:31:58,518 INFO L225 Difference]: With dead ends: 1478 [2019-11-20 05:31:58,518 INFO L226 Difference]: Without dead ends: 1478 [2019-11-20 05:31:58,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=201, Invalid=1131, Unknown=0, NotChecked=0, Total=1332 [2019-11-20 05:31:58,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2019-11-20 05:31:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1146. [2019-11-20 05:31:58,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1146 states. [2019-11-20 05:31:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1146 states to 1146 states and 1722 transitions. [2019-11-20 05:31:58,564 INFO L78 Accepts]: Start accepts. Automaton has 1146 states and 1722 transitions. Word has length 20 [2019-11-20 05:31:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:31:58,564 INFO L462 AbstractCegarLoop]: Abstraction has 1146 states and 1722 transitions. [2019-11-20 05:31:58,564 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:31:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 1146 states and 1722 transitions. [2019-11-20 05:31:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-20 05:31:58,566 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:31:58,566 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, 1, 1, 1] [2019-11-20 05:31:58,769 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:58,777 INFO L410 AbstractCegarLoop]: === Iteration 10 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:31:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:31:58,777 INFO L82 PathProgramCache]: Analyzing trace with hash 729448229, now seen corresponding path program 1 times [2019-11-20 05:31:58,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:31:58,778 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [254638175] [2019-11-20 05:31:58,778 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:31:59,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:31:59,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 05:31:59,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:31:59,276 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:59,277 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:59,282 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:59,283 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:59,284 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 10 [2019-11-20 05:31:59,284 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:59,296 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:59,299 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:31:59,300 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:31:59,302 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:59,302 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 13 [2019-11-20 05:31:59,303 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:31:59,320 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:31:59,320 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:31:59,320 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:52, output treesize:12 [2019-11-20 05:31:59,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:31:59,415 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:00,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-20 05:32:00,139 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:00,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:00,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:00,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:00,148 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,149 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,150 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,155 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,159 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:00,159 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,162 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:00,162 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,165 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,169 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,170 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,172 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,175 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,176 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2019-11-20 05:32:00,176 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,180 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,181 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,182 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,183 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2019-11-20 05:32:00,183 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,184 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:00,184 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:00,184 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,184 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:249, output treesize:1 [2019-11-20 05:32:00,186 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:00,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-20 05:32:00,188 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 4 terms [2019-11-20 05:32:00,199 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,200 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,201 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,202 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,208 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,209 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,211 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,214 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,217 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,219 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2019-11-20 05:32:00,219 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,223 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:00,225 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,226 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,230 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,233 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:00,234 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 1 [2019-11-20 05:32:00,234 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,237 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:00,237 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,241 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:00,241 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,242 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:00,242 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:00,242 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:00,242 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:249, output treesize:1 [2019-11-20 05:32:00,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:00,247 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [254638175] [2019-11-20 05:32:00,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:00,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2019-11-20 05:32:00,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565564376] [2019-11-20 05:32:00,249 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 05:32:00,249 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:00,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 05:32:00,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:32:00,250 INFO L87 Difference]: Start difference. First operand 1146 states and 1722 transitions. Second operand 20 states. [2019-11-20 05:32:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:03,132 INFO L93 Difference]: Finished difference Result 1228 states and 1819 transitions. [2019-11-20 05:32:03,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-20 05:32:03,134 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2019-11-20 05:32:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:03,143 INFO L225 Difference]: With dead ends: 1228 [2019-11-20 05:32:03,143 INFO L226 Difference]: Without dead ends: 1228 [2019-11-20 05:32:03,144 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2019-11-20 05:32:03,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2019-11-20 05:32:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 1132. [2019-11-20 05:32:03,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1132 states. [2019-11-20 05:32:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1132 states to 1132 states and 1698 transitions. [2019-11-20 05:32:03,183 INFO L78 Accepts]: Start accepts. Automaton has 1132 states and 1698 transitions. Word has length 23 [2019-11-20 05:32:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:03,183 INFO L462 AbstractCegarLoop]: Abstraction has 1132 states and 1698 transitions. [2019-11-20 05:32:03,184 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 05:32:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1132 states and 1698 transitions. [2019-11-20 05:32:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:32:03,189 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:03,189 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, 1, 1, 1, 1] [2019-11-20 05:32:03,393 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:03,393 INFO L410 AbstractCegarLoop]: === Iteration 11 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:03,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:03,394 INFO L82 PathProgramCache]: Analyzing trace with hash 1239730484, now seen corresponding path program 1 times [2019-11-20 05:32:03,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:03,394 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1692550199] [2019-11-20 05:32:03,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:03,750 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 05:32:03,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:03,950 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:03,951 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-20 05:32:03,952 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:03,970 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:03,970 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:03,970 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:23 [2019-11-20 05:32:04,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:04,122 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:04,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:04,611 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:04,619 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:04,623 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:04,623 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,627 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:04,628 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:04,628 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,629 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:04,629 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:04,630 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,630 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:04,631 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:04,636 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:04,639 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:04,639 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,647 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:04,647 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:04,648 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,648 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:04,649 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:04,649 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:04,649 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:04,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:04,652 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1692550199] [2019-11-20 05:32:04,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:04,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2019-11-20 05:32:04,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999751662] [2019-11-20 05:32:04,653 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 05:32:04,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:04,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 05:32:04,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:32:04,654 INFO L87 Difference]: Start difference. First operand 1132 states and 1698 transitions. Second operand 20 states. [2019-11-20 05:32:07,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:07,171 INFO L93 Difference]: Finished difference Result 1260 states and 1849 transitions. [2019-11-20 05:32:07,172 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:32:07,172 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2019-11-20 05:32:07,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:07,179 INFO L225 Difference]: With dead ends: 1260 [2019-11-20 05:32:07,179 INFO L226 Difference]: Without dead ends: 1260 [2019-11-20 05:32:07,180 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:32:07,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2019-11-20 05:32:07,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1162. [2019-11-20 05:32:07,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2019-11-20 05:32:07,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1734 transitions. [2019-11-20 05:32:07,217 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1734 transitions. Word has length 24 [2019-11-20 05:32:07,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:07,218 INFO L462 AbstractCegarLoop]: Abstraction has 1162 states and 1734 transitions. [2019-11-20 05:32:07,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 05:32:07,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1734 transitions. [2019-11-20 05:32:07,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 05:32:07,219 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:07,219 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, 1, 1, 1, 1] [2019-11-20 05:32:07,422 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:07,427 INFO L410 AbstractCegarLoop]: === Iteration 12 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:07,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:07,427 INFO L82 PathProgramCache]: Analyzing trace with hash 729196307, now seen corresponding path program 1 times [2019-11-20 05:32:07,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:07,428 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1332028429] [2019-11-20 05:32:07,428 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:07,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:07,641 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:32:07,642 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:07,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:07,697 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:07,698 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:07,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:07,806 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332028429] [2019-11-20 05:32:07,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:07,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 15 [2019-11-20 05:32:07,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368897895] [2019-11-20 05:32:07,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 05:32:07,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:07,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 05:32:07,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:32:07,808 INFO L87 Difference]: Start difference. First operand 1162 states and 1734 transitions. Second operand 15 states. [2019-11-20 05:32:07,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:07,942 INFO L93 Difference]: Finished difference Result 1348 states and 1987 transitions. [2019-11-20 05:32:07,943 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:07,943 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 24 [2019-11-20 05:32:07,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:07,950 INFO L225 Difference]: With dead ends: 1348 [2019-11-20 05:32:07,951 INFO L226 Difference]: Without dead ends: 1348 [2019-11-20 05:32:07,951 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2019-11-20 05:32:07,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1348 states. [2019-11-20 05:32:07,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1348 to 1305. [2019-11-20 05:32:07,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1305 states. [2019-11-20 05:32:07,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1305 states to 1305 states and 1966 transitions. [2019-11-20 05:32:07,991 INFO L78 Accepts]: Start accepts. Automaton has 1305 states and 1966 transitions. Word has length 24 [2019-11-20 05:32:07,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:07,991 INFO L462 AbstractCegarLoop]: Abstraction has 1305 states and 1966 transitions. [2019-11-20 05:32:07,992 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 05:32:07,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1305 states and 1966 transitions. [2019-11-20 05:32:07,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-20 05:32:07,993 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:07,993 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, 1, 1, 1, 1, 1] [2019-11-20 05:32:08,196 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:08,197 INFO L410 AbstractCegarLoop]: === Iteration 13 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:08,197 INFO L82 PathProgramCache]: Analyzing trace with hash 919848459, now seen corresponding path program 1 times [2019-11-20 05:32:08,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:08,198 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [2143992951] [2019-11-20 05:32:08,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:08,542 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-20 05:32:08,544 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:08,762 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:08,763 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-20 05:32:08,764 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:08,776 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:08,776 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:08,777 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:23 [2019-11-20 05:32:08,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:08,886 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:08,919 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:09,497 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:09,507 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,512 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,514 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,515 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:09,515 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,522 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:09,522 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,524 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:09,524 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:09,524 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,524 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:09,526 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:09,531 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,537 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,538 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:09,539 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:09,539 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,542 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:09,542 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,543 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:09,543 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:09,543 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:09,544 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:09,547 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2143992951] [2019-11-20 05:32:09,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:09,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11, 11] imperfect sequences [] total 20 [2019-11-20 05:32:09,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539671680] [2019-11-20 05:32:09,548 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 05:32:09,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:09,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 05:32:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2019-11-20 05:32:09,549 INFO L87 Difference]: Start difference. First operand 1305 states and 1966 transitions. Second operand 20 states. [2019-11-20 05:32:12,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:12,313 INFO L93 Difference]: Finished difference Result 1372 states and 2031 transitions. [2019-11-20 05:32:12,314 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 05:32:12,314 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 25 [2019-11-20 05:32:12,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:12,320 INFO L225 Difference]: With dead ends: 1372 [2019-11-20 05:32:12,320 INFO L226 Difference]: Without dead ends: 1372 [2019-11-20 05:32:12,321 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2019-11-20 05:32:12,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2019-11-20 05:32:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1322. [2019-11-20 05:32:12,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1322 states. [2019-11-20 05:32:12,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1322 states to 1322 states and 1987 transitions. [2019-11-20 05:32:12,359 INFO L78 Accepts]: Start accepts. Automaton has 1322 states and 1987 transitions. Word has length 25 [2019-11-20 05:32:12,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:12,360 INFO L462 AbstractCegarLoop]: Abstraction has 1322 states and 1987 transitions. [2019-11-20 05:32:12,360 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 05:32:12,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1322 states and 1987 transitions. [2019-11-20 05:32:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 05:32:12,361 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:12,361 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, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:12,564 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:12,567 INFO L410 AbstractCegarLoop]: === Iteration 14 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1683749349, now seen corresponding path program 1 times [2019-11-20 05:32:12,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:12,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [419406103] [2019-11-20 05:32:12,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:12,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:12,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 05:32:12,818 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:12,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:32:12,823 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:12,824 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:12,825 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:12,825 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 05:32:12,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:12,834 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:12,852 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [419406103] [2019-11-20 05:32:12,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:12,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2019-11-20 05:32:12,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923182813] [2019-11-20 05:32:12,853 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 05:32:12,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:12,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 05:32:12,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:32:12,854 INFO L87 Difference]: Start difference. First operand 1322 states and 1987 transitions. Second operand 4 states. [2019-11-20 05:32:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:13,152 INFO L93 Difference]: Finished difference Result 1319 states and 1945 transitions. [2019-11-20 05:32:13,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 05:32:13,164 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2019-11-20 05:32:13,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:13,171 INFO L225 Difference]: With dead ends: 1319 [2019-11-20 05:32:13,171 INFO L226 Difference]: Without dead ends: 1319 [2019-11-20 05:32:13,171 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 05:32:13,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2019-11-20 05:32:13,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1319. [2019-11-20 05:32:13,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1319 states. [2019-11-20 05:32:13,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1319 states to 1319 states and 1945 transitions. [2019-11-20 05:32:13,207 INFO L78 Accepts]: Start accepts. Automaton has 1319 states and 1945 transitions. Word has length 26 [2019-11-20 05:32:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:13,207 INFO L462 AbstractCegarLoop]: Abstraction has 1319 states and 1945 transitions. [2019-11-20 05:32:13,207 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 05:32:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1319 states and 1945 transitions. [2019-11-20 05:32:13,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-20 05:32:13,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:13,209 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, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:13,412 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:13,413 INFO L410 AbstractCegarLoop]: === Iteration 15 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1683749350, now seen corresponding path program 1 times [2019-11-20 05:32:13,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:13,414 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1353608261] [2019-11-20 05:32:13,414 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:13,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:13,673 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 05:32:13,674 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:13,682 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:32:13,682 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:13,688 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:13,688 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:13,688 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:32:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:13,708 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:13,826 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1353608261] [2019-11-20 05:32:13,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:13,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2019-11-20 05:32:13,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563556462] [2019-11-20 05:32:13,827 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:32:13,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:13,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:32:13,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:13,828 INFO L87 Difference]: Start difference. First operand 1319 states and 1945 transitions. Second operand 6 states. [2019-11-20 05:32:14,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:14,766 INFO L93 Difference]: Finished difference Result 1732 states and 2508 transitions. [2019-11-20 05:32:14,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:32:14,768 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2019-11-20 05:32:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:14,776 INFO L225 Difference]: With dead ends: 1732 [2019-11-20 05:32:14,776 INFO L226 Difference]: Without dead ends: 1732 [2019-11-20 05:32:14,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-11-20 05:32:14,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2019-11-20 05:32:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1524. [2019-11-20 05:32:14,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1524 states. [2019-11-20 05:32:14,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1524 states to 1524 states and 2220 transitions. [2019-11-20 05:32:14,817 INFO L78 Accepts]: Start accepts. Automaton has 1524 states and 2220 transitions. Word has length 26 [2019-11-20 05:32:14,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:14,818 INFO L462 AbstractCegarLoop]: Abstraction has 1524 states and 2220 transitions. [2019-11-20 05:32:14,818 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:32:14,818 INFO L276 IsEmpty]: Start isEmpty. Operand 1524 states and 2220 transitions. [2019-11-20 05:32:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 05:32:14,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:14,819 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:15,023 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:15,027 INFO L410 AbstractCegarLoop]: === Iteration 16 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:15,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:15,027 INFO L82 PathProgramCache]: Analyzing trace with hash 744331582, now seen corresponding path program 1 times [2019-11-20 05:32:15,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:15,028 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1575342081] [2019-11-20 05:32:15,028 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:15,244 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:32:15,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:15,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:15,293 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:15,294 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:15,312 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1575342081] [2019-11-20 05:32:15,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:15,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2019-11-20 05:32:15,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956456983] [2019-11-20 05:32:15,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:32:15,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:15,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:32:15,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:32:15,313 INFO L87 Difference]: Start difference. First operand 1524 states and 2220 transitions. Second operand 9 states. [2019-11-20 05:32:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:15,403 INFO L93 Difference]: Finished difference Result 1433 states and 2045 transitions. [2019-11-20 05:32:15,404 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:15,404 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-20 05:32:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:15,411 INFO L225 Difference]: With dead ends: 1433 [2019-11-20 05:32:15,412 INFO L226 Difference]: Without dead ends: 1433 [2019-11-20 05:32:15,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:32:15,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2019-11-20 05:32:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1411. [2019-11-20 05:32:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1411 states. [2019-11-20 05:32:15,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1411 states to 1411 states and 2040 transitions. [2019-11-20 05:32:15,445 INFO L78 Accepts]: Start accepts. Automaton has 1411 states and 2040 transitions. Word has length 27 [2019-11-20 05:32:15,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:15,445 INFO L462 AbstractCegarLoop]: Abstraction has 1411 states and 2040 transitions. [2019-11-20 05:32:15,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:32:15,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1411 states and 2040 transitions. [2019-11-20 05:32:15,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 05:32:15,446 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:15,446 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:15,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:15,651 INFO L410 AbstractCegarLoop]: === Iteration 17 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:15,651 INFO L82 PathProgramCache]: Analyzing trace with hash -100140289, now seen corresponding path program 1 times [2019-11-20 05:32:15,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:15,652 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [238629639] [2019-11-20 05:32:15,652 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:15,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:32:15,869 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:15,915 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:15,916 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:15,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [238629639] [2019-11-20 05:32:15,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:15,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [] total 9 [2019-11-20 05:32:15,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482530986] [2019-11-20 05:32:15,936 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:32:15,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:15,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:32:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:32:15,937 INFO L87 Difference]: Start difference. First operand 1411 states and 2040 transitions. Second operand 9 states. [2019-11-20 05:32:16,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:16,031 INFO L93 Difference]: Finished difference Result 1330 states and 1886 transitions. [2019-11-20 05:32:16,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:16,035 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2019-11-20 05:32:16,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:16,043 INFO L225 Difference]: With dead ends: 1330 [2019-11-20 05:32:16,043 INFO L226 Difference]: Without dead ends: 1330 [2019-11-20 05:32:16,044 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:32:16,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2019-11-20 05:32:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 1308. [2019-11-20 05:32:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1308 states. [2019-11-20 05:32:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1308 states to 1308 states and 1881 transitions. [2019-11-20 05:32:16,074 INFO L78 Accepts]: Start accepts. Automaton has 1308 states and 1881 transitions. Word has length 27 [2019-11-20 05:32:16,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:16,075 INFO L462 AbstractCegarLoop]: Abstraction has 1308 states and 1881 transitions. [2019-11-20 05:32:16,075 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:32:16,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1308 states and 1881 transitions. [2019-11-20 05:32:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 05:32:16,076 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:16,076 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:16,279 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:16,287 INFO L410 AbstractCegarLoop]: === Iteration 18 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:16,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:16,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1119538234, now seen corresponding path program 1 times [2019-11-20 05:32:16,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:16,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970123132] [2019-11-20 05:32:16,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:16,546 INFO L255 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 05:32:16,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:16,607 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 15 treesize of output 7 [2019-11-20 05:32:16,608 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,628 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,630 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 15 treesize of output 7 [2019-11-20 05:32:16,631 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,638 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:16,638 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:16,638 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:29, output treesize:7 [2019-11-20 05:32:16,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:16,686 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:16,723 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:16,757 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970123132] [2019-11-20 05:32:16,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:16,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 9 [2019-11-20 05:32:16,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155396408] [2019-11-20 05:32:16,757 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:32:16,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:32:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:32:16,758 INFO L87 Difference]: Start difference. First operand 1308 states and 1881 transitions. Second operand 9 states. [2019-11-20 05:32:17,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:17,404 INFO L93 Difference]: Finished difference Result 1472 states and 2055 transitions. [2019-11-20 05:32:17,405 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 05:32:17,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-11-20 05:32:17,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:17,412 INFO L225 Difference]: With dead ends: 1472 [2019-11-20 05:32:17,412 INFO L226 Difference]: Without dead ends: 1472 [2019-11-20 05:32:17,412 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-20 05:32:17,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2019-11-20 05:32:17,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1426. [2019-11-20 05:32:17,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1426 states. [2019-11-20 05:32:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 1999 transitions. [2019-11-20 05:32:17,444 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 1999 transitions. Word has length 28 [2019-11-20 05:32:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:17,444 INFO L462 AbstractCegarLoop]: Abstraction has 1426 states and 1999 transitions. [2019-11-20 05:32:17,445 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:32:17,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 1999 transitions. [2019-11-20 05:32:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-20 05:32:17,445 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:17,446 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:17,649 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:17,650 INFO L410 AbstractCegarLoop]: === Iteration 19 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:17,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:17,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1119538040, now seen corresponding path program 1 times [2019-11-20 05:32:17,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:17,651 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [751638897] [2019-11-20 05:32:17,651 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:17,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:32:17,917 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:17,922 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:32:17,922 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:17,927 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:17,927 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:17,927 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:32:17,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:17,986 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:18,368 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [751638897] [2019-11-20 05:32:18,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:18,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 05:32:18,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29062427] [2019-11-20 05:32:18,372 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 05:32:18,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:18,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 05:32:18,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:32:18,374 INFO L87 Difference]: Start difference. First operand 1426 states and 1999 transitions. Second operand 8 states. [2019-11-20 05:32:19,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:19,720 INFO L93 Difference]: Finished difference Result 1433 states and 1973 transitions. [2019-11-20 05:32:19,723 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 05:32:19,723 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-20 05:32:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:19,732 INFO L225 Difference]: With dead ends: 1433 [2019-11-20 05:32:19,732 INFO L226 Difference]: Without dead ends: 1433 [2019-11-20 05:32:19,733 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=40, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:32:19,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2019-11-20 05:32:19,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1425. [2019-11-20 05:32:19,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1425 states. [2019-11-20 05:32:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1973 transitions. [2019-11-20 05:32:19,800 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1973 transitions. Word has length 28 [2019-11-20 05:32:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:19,801 INFO L462 AbstractCegarLoop]: Abstraction has 1425 states and 1973 transitions. [2019-11-20 05:32:19,801 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 05:32:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1973 transitions. [2019-11-20 05:32:19,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 05:32:19,802 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:19,802 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:20,006 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:20,008 INFO L410 AbstractCegarLoop]: === Iteration 20 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:20,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:20,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2021485239, now seen corresponding path program 1 times [2019-11-20 05:32:20,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:20,009 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [723063283] [2019-11-20 05:32:20,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:20,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 05:32:20,282 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:20,451 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,452 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,455 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,456 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,459 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,459 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 13 [2019-11-20 05:32:20,460 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,463 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,463 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,463 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:3 [2019-11-20 05:32:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:20,492 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:20,643 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:20,759 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,760 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,764 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,765 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,768 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,768 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 16 [2019-11-20 05:32:20,768 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,769 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,769 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,769 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:1 [2019-11-20 05:32:20,779 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,780 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,783 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:20,784 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:20,787 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,787 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 16 [2019-11-20 05:32:20,787 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,788 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:20,788 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:20,789 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:1 [2019-11-20 05:32:20,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:20,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [723063283] [2019-11-20 05:32:20,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:20,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 15 [2019-11-20 05:32:20,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606832417] [2019-11-20 05:32:20,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 05:32:20,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:20,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 05:32:20,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2019-11-20 05:32:20,794 INFO L87 Difference]: Start difference. First operand 1425 states and 1973 transitions. Second operand 16 states. [2019-11-20 05:32:22,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:22,467 INFO L93 Difference]: Finished difference Result 1468 states and 2007 transitions. [2019-11-20 05:32:22,479 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:22,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 30 [2019-11-20 05:32:22,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:22,488 INFO L225 Difference]: With dead ends: 1468 [2019-11-20 05:32:22,488 INFO L226 Difference]: Without dead ends: 1468 [2019-11-20 05:32:22,489 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-11-20 05:32:22,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1468 states. [2019-11-20 05:32:22,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1468 to 1425. [2019-11-20 05:32:22,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1425 states. [2019-11-20 05:32:22,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 1971 transitions. [2019-11-20 05:32:22,528 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 1971 transitions. Word has length 30 [2019-11-20 05:32:22,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:22,530 INFO L462 AbstractCegarLoop]: Abstraction has 1425 states and 1971 transitions. [2019-11-20 05:32:22,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 05:32:22,530 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 1971 transitions. [2019-11-20 05:32:22,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 05:32:22,530 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:22,530 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:22,731 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:22,731 INFO L410 AbstractCegarLoop]: === Iteration 21 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:22,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:22,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1758466941, now seen corresponding path program 1 times [2019-11-20 05:32:22,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:22,732 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [316497049] [2019-11-20 05:32:22,732 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:23,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:23,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 05:32:23,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:23,209 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,210 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,213 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,214 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,216 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,216 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 13 [2019-11-20 05:32:23,217 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,222 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,222 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,222 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:7 [2019-11-20 05:32:23,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:23,246 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:23,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:23,565 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,566 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,569 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,570 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,578 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,579 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 16 [2019-11-20 05:32:23,579 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,583 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,583 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,583 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:1 [2019-11-20 05:32:23,588 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,591 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,597 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:23,598 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:23,601 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,602 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 34 treesize of output 16 [2019-11-20 05:32:23,602 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,603 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:23,604 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:23,604 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:1 [2019-11-20 05:32:23,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:23,608 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [316497049] [2019-11-20 05:32:23,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:23,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 16 [2019-11-20 05:32:23,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458007140] [2019-11-20 05:32:23,609 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 05:32:23,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:23,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 05:32:23,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2019-11-20 05:32:23,610 INFO L87 Difference]: Start difference. First operand 1425 states and 1971 transitions. Second operand 17 states. [2019-11-20 05:32:25,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:25,818 INFO L93 Difference]: Finished difference Result 1647 states and 2252 transitions. [2019-11-20 05:32:25,819 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 05:32:25,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 31 [2019-11-20 05:32:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:25,829 INFO L225 Difference]: With dead ends: 1647 [2019-11-20 05:32:25,829 INFO L226 Difference]: Without dead ends: 1647 [2019-11-20 05:32:25,829 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-11-20 05:32:25,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2019-11-20 05:32:25,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1504. [2019-11-20 05:32:25,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1504 states. [2019-11-20 05:32:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2078 transitions. [2019-11-20 05:32:25,859 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2078 transitions. Word has length 31 [2019-11-20 05:32:25,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:25,860 INFO L462 AbstractCegarLoop]: Abstraction has 1504 states and 2078 transitions. [2019-11-20 05:32:25,860 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 05:32:25,860 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2078 transitions. [2019-11-20 05:32:25,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 05:32:25,861 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:25,861 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:26,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:26,067 INFO L410 AbstractCegarLoop]: === Iteration 22 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:26,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:26,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1548501974, now seen corresponding path program 1 times [2019-11-20 05:32:26,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:26,068 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [715827058] [2019-11-20 05:32:26,068 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:26,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:26,317 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 05:32:26,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:26,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:26,356 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:26,455 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [715827058] [2019-11-20 05:32:26,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:26,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-11-20 05:32:26,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924755344] [2019-11-20 05:32:26,456 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 05:32:26,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 05:32:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 05:32:26,456 INFO L87 Difference]: Start difference. First operand 1504 states and 2078 transitions. Second operand 10 states. [2019-11-20 05:32:26,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:26,686 INFO L93 Difference]: Finished difference Result 1981 states and 2826 transitions. [2019-11-20 05:32:26,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 05:32:26,687 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2019-11-20 05:32:26,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:26,697 INFO L225 Difference]: With dead ends: 1981 [2019-11-20 05:32:26,698 INFO L226 Difference]: Without dead ends: 1981 [2019-11-20 05:32:26,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:32:26,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1981 states. [2019-11-20 05:32:26,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1981 to 1787. [2019-11-20 05:32:26,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1787 states. [2019-11-20 05:32:26,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1787 states to 1787 states and 2537 transitions. [2019-11-20 05:32:26,734 INFO L78 Accepts]: Start accepts. Automaton has 1787 states and 2537 transitions. Word has length 33 [2019-11-20 05:32:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:26,735 INFO L462 AbstractCegarLoop]: Abstraction has 1787 states and 2537 transitions. [2019-11-20 05:32:26,735 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 05:32:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 1787 states and 2537 transitions. [2019-11-20 05:32:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 05:32:26,736 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:26,736 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:26,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:26,939 INFO L410 AbstractCegarLoop]: === Iteration 23 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:26,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:26,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1548500052, now seen corresponding path program 1 times [2019-11-20 05:32:26,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:26,940 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1399363524] [2019-11-20 05:32:26,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:27,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 05:32:27,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:27,632 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:27,633 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,633 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,639 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:27,640 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,641 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,642 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 13 [2019-11-20 05:32:27,642 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:27,664 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:27,669 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:27,669 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,670 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:27,682 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:27,683 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 19 [2019-11-20 05:32:27,683 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:27,696 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:27,696 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:27,696 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:13 [2019-11-20 05:32:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:27,790 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:28,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:28,081 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,082 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:28,083 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,087 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,087 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:28,088 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,091 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,093 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,094 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2019-11-20 05:32:28,094 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,099 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:28,099 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,103 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:28,103 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:28,103 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,103 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:1 [2019-11-20 05:32:28,105 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:28,111 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:28,115 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,117 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,120 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:28,120 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,124 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:28,125 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,127 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:28,128 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2019-11-20 05:32:28,128 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,130 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:28,130 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:28,131 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:28,131 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:97, output treesize:1 [2019-11-20 05:32:28,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:28,134 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1399363524] [2019-11-20 05:32:28,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:28,134 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 7] imperfect sequences [] total 15 [2019-11-20 05:32:28,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711467386] [2019-11-20 05:32:28,135 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 05:32:28,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:28,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 05:32:28,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2019-11-20 05:32:28,136 INFO L87 Difference]: Start difference. First operand 1787 states and 2537 transitions. Second operand 15 states. [2019-11-20 05:32:29,027 WARN L191 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2019-11-20 05:32:30,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:30,091 INFO L93 Difference]: Finished difference Result 1753 states and 2451 transitions. [2019-11-20 05:32:30,092 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 05:32:30,092 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-20 05:32:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:30,111 INFO L225 Difference]: With dead ends: 1753 [2019-11-20 05:32:30,111 INFO L226 Difference]: Without dead ends: 1753 [2019-11-20 05:32:30,112 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2019-11-20 05:32:30,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1753 states. [2019-11-20 05:32:30,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1753 to 1703. [2019-11-20 05:32:30,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1703 states. [2019-11-20 05:32:30,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2405 transitions. [2019-11-20 05:32:30,133 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2405 transitions. Word has length 33 [2019-11-20 05:32:30,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:30,134 INFO L462 AbstractCegarLoop]: Abstraction has 1703 states and 2405 transitions. [2019-11-20 05:32:30,134 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 05:32:30,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2405 transitions. [2019-11-20 05:32:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 05:32:30,134 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:30,134 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:30,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:30,338 INFO L410 AbstractCegarLoop]: === Iteration 24 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:30,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:30,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1964580026, now seen corresponding path program 1 times [2019-11-20 05:32:30,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:30,338 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [598422919] [2019-11-20 05:32:30,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:30,602 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-20 05:32:30,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:30,982 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:32:30,991 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:30,999 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:31,002 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:31,014 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,015 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 43 [2019-11-20 05:32:31,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,019 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-20 05:32:31,019 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,024 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 05:32:31,037 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,038 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 1 [2019-11-20 05:32:31,038 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,067 INFO L567 ElimStorePlain]: treesize reduction 9, result has 69.0 percent of original size [2019-11-20 05:32:31,081 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,081 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2019-11-20 05:32:31,081 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,084 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,084 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,084 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 6 variables, input treesize:137, output treesize:5 [2019-11-20 05:32:31,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:31,145 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:31,804 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:31,806 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:31,809 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:31,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:31,810 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:31,810 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,812 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:31,812 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,814 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,814 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:31,814 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,814 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:31,815 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:31,817 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:31,819 WARN L227 Elim1Store]: Array PQE input equivalent to true [2019-11-20 05:32:31,819 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,822 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 05:32:31,822 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 1 [2019-11-20 05:32:31,823 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,823 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:31,823 INFO L464 ElimStorePlain]: Eliminatee |#memory_$Pointer$.offset| vanished before elimination [2019-11-20 05:32:31,823 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:31,824 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:53, output treesize:1 [2019-11-20 05:32:31,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:31,827 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [598422919] [2019-11-20 05:32:31,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:31,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12, 11] imperfect sequences [] total 21 [2019-11-20 05:32:31,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585019026] [2019-11-20 05:32:31,828 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-20 05:32:31,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:31,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-20 05:32:31,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2019-11-20 05:32:31,828 INFO L87 Difference]: Start difference. First operand 1703 states and 2405 transitions. Second operand 21 states. [2019-11-20 05:32:32,551 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2019-11-20 05:32:32,877 WARN L191 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2019-11-20 05:32:33,240 WARN L191 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 57 [2019-11-20 05:32:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:35,461 INFO L93 Difference]: Finished difference Result 1110 states and 1572 transitions. [2019-11-20 05:32:35,461 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 05:32:35,461 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 33 [2019-11-20 05:32:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:35,467 INFO L225 Difference]: With dead ends: 1110 [2019-11-20 05:32:35,467 INFO L226 Difference]: Without dead ends: 1110 [2019-11-20 05:32:35,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2019-11-20 05:32:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2019-11-20 05:32:35,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 1110. [2019-11-20 05:32:35,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1110 states. [2019-11-20 05:32:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1110 states to 1110 states and 1572 transitions. [2019-11-20 05:32:35,488 INFO L78 Accepts]: Start accepts. Automaton has 1110 states and 1572 transitions. Word has length 33 [2019-11-20 05:32:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:35,488 INFO L462 AbstractCegarLoop]: Abstraction has 1110 states and 1572 transitions. [2019-11-20 05:32:35,488 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-20 05:32:35,488 INFO L276 IsEmpty]: Start isEmpty. Operand 1110 states and 1572 transitions. [2019-11-20 05:32:35,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 05:32:35,489 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:35,489 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:35,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:35,694 INFO L410 AbstractCegarLoop]: === Iteration 25 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:35,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:35,694 INFO L82 PathProgramCache]: Analyzing trace with hash 544312889, now seen corresponding path program 1 times [2019-11-20 05:32:35,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:35,694 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1338948212] [2019-11-20 05:32:35,694 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:35,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 05:32:35,941 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:35,944 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:32:35,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:35,946 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:35,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:35,946 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 05:32:35,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:35,983 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:36,103 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1338948212] [2019-11-20 05:32:36,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:36,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 8 [2019-11-20 05:32:36,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717595222] [2019-11-20 05:32:36,104 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-20 05:32:36,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:36,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-20 05:32:36,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-11-20 05:32:36,106 INFO L87 Difference]: Start difference. First operand 1110 states and 1572 transitions. Second operand 9 states. [2019-11-20 05:32:37,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:37,047 INFO L93 Difference]: Finished difference Result 1109 states and 1562 transitions. [2019-11-20 05:32:37,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:32:37,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2019-11-20 05:32:37,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:37,066 INFO L225 Difference]: With dead ends: 1109 [2019-11-20 05:32:37,066 INFO L226 Difference]: Without dead ends: 1109 [2019-11-20 05:32:37,067 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-20 05:32:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2019-11-20 05:32:37,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 1109. [2019-11-20 05:32:37,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1109 states. [2019-11-20 05:32:37,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1562 transitions. [2019-11-20 05:32:37,085 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1562 transitions. Word has length 38 [2019-11-20 05:32:37,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:37,086 INFO L462 AbstractCegarLoop]: Abstraction has 1109 states and 1562 transitions. [2019-11-20 05:32:37,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-20 05:32:37,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1562 transitions. [2019-11-20 05:32:37,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-20 05:32:37,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:37,087 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:37,290 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:37,291 INFO L410 AbstractCegarLoop]: === Iteration 26 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:37,291 INFO L82 PathProgramCache]: Analyzing trace with hash 544312890, now seen corresponding path program 1 times [2019-11-20 05:32:37,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:37,292 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1974146486] [2019-11-20 05:32:37,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:37,549 INFO L255 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-20 05:32:37,550 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:37,554 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 05:32:37,555 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:37,560 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:37,560 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:37,560 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 05:32:37,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:37,616 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:37,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1974146486] [2019-11-20 05:32:37,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:37,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2019-11-20 05:32:37,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233395806] [2019-11-20 05:32:37,976 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 05:32:37,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:37,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 05:32:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2019-11-20 05:32:37,977 INFO L87 Difference]: Start difference. First operand 1109 states and 1562 transitions. Second operand 12 states. [2019-11-20 05:32:39,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:39,227 INFO L93 Difference]: Finished difference Result 1108 states and 1552 transitions. [2019-11-20 05:32:39,232 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:32:39,232 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-11-20 05:32:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:39,236 INFO L225 Difference]: With dead ends: 1108 [2019-11-20 05:32:39,236 INFO L226 Difference]: Without dead ends: 1108 [2019-11-20 05:32:39,236 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2019-11-20 05:32:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2019-11-20 05:32:39,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1108. [2019-11-20 05:32:39,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1108 states. [2019-11-20 05:32:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1552 transitions. [2019-11-20 05:32:39,254 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1552 transitions. Word has length 38 [2019-11-20 05:32:39,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:39,254 INFO L462 AbstractCegarLoop]: Abstraction has 1108 states and 1552 transitions. [2019-11-20 05:32:39,254 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 05:32:39,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1552 transitions. [2019-11-20 05:32:39,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-20 05:32:39,255 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:39,255 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:39,459 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:39,459 INFO L410 AbstractCegarLoop]: === Iteration 27 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash -901324198, now seen corresponding path program 1 times [2019-11-20 05:32:39,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:39,460 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1870950150] [2019-11-20 05:32:39,460 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:39,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 05:32:39,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:39,756 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:39,784 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:39,784 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2019-11-20 05:32:39,784 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:39,785 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:39,787 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:39,787 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:39,787 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:3 [2019-11-20 05:32:39,799 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:39,799 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 18 [2019-11-20 05:32:39,799 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:39,800 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 05:32:39,802 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:39,802 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 05:32:39,802 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:3 [2019-11-20 05:32:39,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:39,811 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1870950150] [2019-11-20 05:32:39,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 05:32:39,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-20 05:32:39,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713748885] [2019-11-20 05:32:39,812 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-20 05:32:39,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 05:32:39,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-20 05:32:39,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-20 05:32:39,812 INFO L87 Difference]: Start difference. First operand 1108 states and 1552 transitions. Second operand 6 states. [2019-11-20 05:32:40,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 05:32:40,306 INFO L93 Difference]: Finished difference Result 1388 states and 1883 transitions. [2019-11-20 05:32:40,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 05:32:40,306 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2019-11-20 05:32:40,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 05:32:40,309 INFO L225 Difference]: With dead ends: 1388 [2019-11-20 05:32:40,309 INFO L226 Difference]: Without dead ends: 1388 [2019-11-20 05:32:40,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-20 05:32:40,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2019-11-20 05:32:40,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1105. [2019-11-20 05:32:40,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1105 states. [2019-11-20 05:32:40,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1522 transitions. [2019-11-20 05:32:40,325 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1522 transitions. Word has length 40 [2019-11-20 05:32:40,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 05:32:40,326 INFO L462 AbstractCegarLoop]: Abstraction has 1105 states and 1522 transitions. [2019-11-20 05:32:40,326 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-20 05:32:40,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1522 transitions. [2019-11-20 05:32:40,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-20 05:32:40,327 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 05:32:40,327 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 05:32:40,531 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:40,531 INFO L410 AbstractCegarLoop]: === Iteration 28 === [append_oneErr1REQUIRES_VIOLATION, append_oneErr7REQUIRES_VIOLATION, append_oneErr6REQUIRES_VIOLATION, append_oneErr0REQUIRES_VIOLATION, append_oneErr5REQUIRES_VIOLATION, append_oneErr4REQUIRES_VIOLATION, append_oneErr2REQUIRES_VIOLATION, append_oneErr3REQUIRES_VIOLATION, remove_oneErr5REQUIRES_VIOLATION, remove_oneErr16REQUIRES_VIOLATION, remove_oneErr17REQUIRES_VIOLATION, remove_oneErr18REQUIRES_VIOLATION, remove_oneErr8ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr9REQUIRES_VIOLATION, remove_oneErr7ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr10REQUIRES_VIOLATION, remove_oneErr0REQUIRES_VIOLATION, remove_oneErr11REQUIRES_VIOLATION, remove_oneErr1REQUIRES_VIOLATION, remove_oneErr6ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr12REQUIRES_VIOLATION, remove_oneErr13REQUIRES_VIOLATION, remove_oneErr2REQUIRES_VIOLATION, remove_oneErr3REQUIRES_VIOLATION, remove_oneErr19ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr14REQUIRES_VIOLATION, remove_oneErr15REQUIRES_VIOLATION, remove_oneErr20ASSERT_VIOLATIONMEMORY_FREE, remove_oneErr4REQUIRES_VIOLATION, remove_oneErr21ASSERT_VIOLATIONMEMORY_FREE, create_itemErr18REQUIRES_VIOLATION, create_itemErr8REQUIRES_VIOLATION, create_itemErr19REQUIRES_VIOLATION, create_itemErr9REQUIRES_VIOLATION, create_itemErr20REQUIRES_VIOLATION, create_itemErr10REQUIRES_VIOLATION, create_itemErr21REQUIRES_VIOLATION, create_itemErr11REQUIRES_VIOLATION, create_itemErr12REQUIRES_VIOLATION, create_itemErr2REQUIRES_VIOLATION, create_itemErr13REQUIRES_VIOLATION, create_itemErr1REQUIRES_VIOLATION, create_itemErr3REQUIRES_VIOLATION, create_itemErr14REQUIRES_VIOLATION, create_itemErr0REQUIRES_VIOLATION, create_itemErr4REQUIRES_VIOLATION, create_itemErr15REQUIRES_VIOLATION, create_itemErr5REQUIRES_VIOLATION, create_itemErr16REQUIRES_VIOLATION, create_itemErr6REQUIRES_VIOLATION, create_itemErr17REQUIRES_VIOLATION, create_itemErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr7ENSURES_VIOLATIONMEMORY_LEAK, mainErr3REQUIRES_VIOLATION, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr6ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr0REQUIRES_VIOLATION, is_emptyErr1REQUIRES_VIOLATION, is_emptyErr2REQUIRES_VIOLATION, is_emptyErr3REQUIRES_VIOLATION, is_emptyErr4ASSERT_VIOLATIONMEMORY_FREE, is_emptyErr5ASSERT_VIOLATIONMEMORY_FREE]=== [2019-11-20 05:32:40,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 05:32:40,532 INFO L82 PathProgramCache]: Analyzing trace with hash -901324197, now seen corresponding path program 1 times [2019-11-20 05:32:40,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 05:32:40,532 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [390052830] [2019-11-20 05:32:40,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ee75a4b0-debf-46cf-981d-91d981e432a8/bin/uautomizer/cvc4 Starting monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 05:32:40,858 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-20 05:32:40,859 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 05:32:40,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 05:32:40,958 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 05:32:41,060 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:32:41,071 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:41,072 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2019-11-20 05:32:41,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,072 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,073 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:41,087 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 [2019-11-20 05:32:41,088 INFO L496 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:41,096 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 [2019-11-20 05:32:41,097 INFO L496 ElimStorePlain]: Start of recursive call 4: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:41,160 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:41,161 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,161 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: 4 dim-0 vars, and 3 xjuncts. [2019-11-20 05:32:41,162 INFO L221 ElimStorePlain]: Needed 4 recursive calls to eliminate 1 variables, input treesize:57, output treesize:57 [2019-11-20 05:32:41,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,435 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 25 [2019-11-20 05:32:41,436 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 05:32:41,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,930 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 25 [2019-11-20 05:32:41,948 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:41,948 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 23 [2019-11-20 05:32:41,948 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,949 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:41,949 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 05:32:42,024 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 05:32:42,025 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 05:32:42,226 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 05:32:42,226 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.UnsupportedOperationException: alternation not yet supported: (forall ((v_append_one_~list.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32)) (v_arrayElimCell_89 (_ BitVec 32))) (exists ((v_arrayElimCell_85 (_ BitVec 32))) (let ((.cse2 (bvmul ~unnamed1~0~LIST_BEG (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse1 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2))) (or (not (bvsle (bvadd create_item_~cursor.offset (_ bv4 32)) v_arrayElimCell_88)) (and (= create_item_~cursor.base |create_item_#in~cursor.base|) (not (= v_arrayElimCell_89 v_arrayElimCell_88))) (and (not (bvsle .cse0 v_arrayElimCell_85)) (bvsle (bvadd |create_item_#in~cursor.offset| (_ bv4 32)) v_arrayElimCell_85)) (not (bvsle .cse1 .cse0)) (bvsle .cse0 v_arrayElimCell_89) (not (bvsle (_ bv0 32) .cse1))))))) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyNonSddEliminations(ElimStorePlain.java:667) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:493) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:216) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:306) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:102) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:419) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:291) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:334) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:177) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:162) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 05:32:42,231 INFO L168 Benchmark]: Toolchain (without parser) took 110306.87 ms. Allocated memory was 1.0 GB in the beginning and 1.5 GB in the end (delta: 445.1 MB). Free memory was 943.4 MB in the beginning and 1.0 GB in the end (delta: -77.5 MB). Peak memory consumption was 367.6 MB. Max. memory is 11.5 GB. [2019-11-20 05:32:42,231 INFO L168 Benchmark]: CDTParser took 0.78 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 05:32:42,231 INFO L168 Benchmark]: CACSL2BoogieTranslator took 887.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -143.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. [2019-11-20 05:32:42,232 INFO L168 Benchmark]: Boogie Preprocessor took 167.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. [2019-11-20 05:32:42,232 INFO L168 Benchmark]: RCFGBuilder took 1807.67 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.2 MB in the end (delta: 99.0 MB). Peak memory consumption was 99.0 MB. Max. memory is 11.5 GB. [2019-11-20 05:32:42,233 INFO L168 Benchmark]: TraceAbstraction took 107440.67 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 325.6 MB). Free memory was 981.2 MB in the beginning and 1.0 GB in the end (delta: -39.7 MB). Peak memory consumption was 285.9 MB. Max. memory is 11.5 GB. [2019-11-20 05:32:42,234 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.78 ms. Allocated memory is still 1.0 GB. Free memory is still 967.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 887.19 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 119.5 MB). Free memory was 943.4 MB in the beginning and 1.1 GB in the end (delta: -143.8 MB). Peak memory consumption was 18.7 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 167.40 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 7.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 11.5 GB. * RCFGBuilder took 1807.67 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 981.2 MB in the end (delta: 99.0 MB). Peak memory consumption was 99.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 107440.67 ms. Allocated memory was 1.1 GB in the beginning and 1.5 GB in the end (delta: 325.6 MB). Free memory was 981.2 MB in the beginning and 1.0 GB in the end (delta: -39.7 MB). Peak memory consumption was 285.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: UnsupportedOperationException: alternation not yet supported: (forall ((v_append_one_~list.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32)) (v_arrayElimCell_89 (_ BitVec 32))) (exists ((v_arrayElimCell_85 (_ BitVec 32))) (let ((.cse2 (bvmul ~unnamed1~0~LIST_BEG (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse1 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2))) (or (not (bvsle (bvadd create_item_~cursor.offset (_ bv4 32)) v_arrayElimCell_88)) (and (= create_item_~cursor.base |create_item_#in~cursor.base|) (not (= v_arrayElimCell_89 v_arrayElimCell_88))) (and (not (bvsle .cse0 v_arrayElimCell_85)) (bvsle (bvadd |create_item_#in~cursor.offset| (_ bv4 32)) v_arrayElimCell_85)) (not (bvsle .cse1 .cse0)) (bvsle .cse0 v_arrayElimCell_89) (not (bvsle (_ bv0 32) .cse1))))))) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: UnsupportedOperationException: alternation not yet supported: (forall ((v_append_one_~list.offset_BEFORE_CALL_2 (_ BitVec 32)) (v_arrayElimCell_88 (_ BitVec 32)) (v_arrayElimCell_89 (_ BitVec 32))) (exists ((v_arrayElimCell_85 (_ BitVec 32))) (let ((.cse2 (bvmul ~unnamed1~0~LIST_BEG (_ bv4 32)))) (let ((.cse0 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2 (_ bv4 32))) (.cse1 (bvadd .cse2 v_append_one_~list.offset_BEFORE_CALL_2))) (or (not (bvsle (bvadd create_item_~cursor.offset (_ bv4 32)) v_arrayElimCell_88)) (and (= create_item_~cursor.base |create_item_#in~cursor.base|) (not (= v_arrayElimCell_89 v_arrayElimCell_88))) (and (not (bvsle .cse0 v_arrayElimCell_85)) (bvsle (bvadd |create_item_#in~cursor.offset| (_ bv4 32)) v_arrayElimCell_85)) (not (bvsle .cse1 .cse0)) (bvsle .cse0 v_arrayElimCell_89) (not (bvsle (_ bv0 32) .cse1))))))): de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyNonSddEliminations(ElimStorePlain.java:667) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...