./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.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_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 bebd3708d0e1127b0953933828504d3490382862 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: no XNF --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 08:59:24,007 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 08:59:24,009 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 08:59:24,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 08:59:24,024 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 08:59:24,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 08:59:24,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 08:59:24,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 08:59:24,040 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 08:59:24,044 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 08:59:24,045 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 08:59:24,046 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 08:59:24,046 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 08:59:24,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 08:59:24,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 08:59:24,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 08:59:24,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 08:59:24,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 08:59:24,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 08:59:24,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 08:59:24,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 08:59:24,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 08:59:24,065 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 08:59:24,066 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 08:59:24,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 08:59:24,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 08:59:24,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 08:59:24,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 08:59:24,071 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 08:59:24,072 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 08:59:24,072 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 08:59:24,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 08:59:24,073 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 08:59:24,074 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 08:59:24,075 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 08:59:24,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 08:59:24,075 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 08:59:24,076 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 08:59:24,076 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 08:59:24,077 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 08:59:24,078 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 08:59:24,078 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 08:59:24,101 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 08:59:24,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 08:59:24,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 08:59:24,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 08:59:24,112 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 08:59:24,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 08:59:24,113 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 08:59:24,113 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 08:59:24,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 08:59:24,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 08:59:24,114 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 08:59:24,114 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 08:59:24,114 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 08:59:24,114 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 08:59:24,115 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 08:59:24,115 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 08:59:24,115 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 08:59:24,115 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 08:59:24,116 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 08:59:24,116 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 08:59:24,116 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 08:59:24,116 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 08:59:24,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 08:59:24,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:59:24,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 08:59:24,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 08:59:24,117 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 08:59:24,118 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 08:59:24,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 08:59:24,118 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_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 -> bebd3708d0e1127b0953933828504d3490382862 [2019-11-20 08:59:24,285 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 08:59:24,295 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 08:59:24,298 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 08:59:24,299 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 08:59:24,300 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 08:59:24,300 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-11-20 08:59:24,346 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/data/e965294f5/c136236cd1f84cd185f655a9eee4dc76/FLAG173179c4c [2019-11-20 08:59:24,823 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 08:59:24,824 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/sv-benchmarks/c/list-ext3-properties/dll_circular_traversal-2.i [2019-11-20 08:59:24,841 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/data/e965294f5/c136236cd1f84cd185f655a9eee4dc76/FLAG173179c4c [2019-11-20 08:59:25,130 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/data/e965294f5/c136236cd1f84cd185f655a9eee4dc76 [2019-11-20 08:59:25,133 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 08:59:25,134 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 08:59:25,135 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 08:59:25,135 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 08:59:25,138 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 08:59:25,139 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ed0a0f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25, skipping insertion in model container [2019-11-20 08:59:25,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,149 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 08:59:25,216 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 08:59:25,606 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:59:25,617 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 08:59:25,655 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 08:59:25,706 INFO L192 MainTranslator]: Completed translation [2019-11-20 08:59:25,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25 WrapperNode [2019-11-20 08:59:25,707 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 08:59:25,707 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 08:59:25,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 08:59:25,708 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 08:59:25,720 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,781 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,791 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,795 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... [2019-11-20 08:59:25,802 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 08:59:25,802 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 08:59:25,802 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 08:59:25,803 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 08:59:25,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 08:59:25,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 08:59:25,856 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 08:59:25,856 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 08:59:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 08:59:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 08:59:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2019-11-20 08:59:25,857 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 08:59:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-20 08:59:25,857 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 08:59:25,858 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 08:59:25,859 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 08:59:25,860 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 08:59:25,861 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 08:59:25,862 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 08:59:25,863 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 08:59:25,864 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 08:59:25,865 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 08:59:25,866 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 08:59:25,867 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 08:59:25,868 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 08:59:25,869 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 08:59:25,870 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 08:59:25,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 08:59:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 08:59:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 08:59:25,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 08:59:26,407 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 08:59:26,579 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 08:59:26,579 INFO L285 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-20 08:59:26,580 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:59:26 BoogieIcfgContainer [2019-11-20 08:59:26,581 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 08:59:26,582 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 08:59:26,582 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 08:59:26,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 08:59:26,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 08:59:25" (1/3) ... [2019-11-20 08:59:26,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a68b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:59:26, skipping insertion in model container [2019-11-20 08:59:26,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 08:59:25" (2/3) ... [2019-11-20 08:59:26,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40a68b65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 08:59:26, skipping insertion in model container [2019-11-20 08:59:26,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 08:59:26" (3/3) ... [2019-11-20 08:59:26,587 INFO L109 eAbstractionObserver]: Analyzing ICFG dll_circular_traversal-2.i [2019-11-20 08:59:26,596 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 08:59:26,604 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 34 error locations. [2019-11-20 08:59:26,614 INFO L249 AbstractCegarLoop]: Starting to check reachability of 34 error locations. [2019-11-20 08:59:26,633 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 08:59:26,633 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 08:59:26,642 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 08:59:26,643 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 08:59:26,644 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 08:59:26,645 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 08:59:26,645 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 08:59:26,645 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 08:59:26,671 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states. [2019-11-20 08:59:26,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:59:26,682 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:26,683 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:26,684 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:26,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:26,691 INFO L82 PathProgramCache]: Analyzing trace with hash 370585340, now seen corresponding path program 1 times [2019-11-20 08:59:26,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:26,703 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [834757136] [2019-11-20 08:59:26,704 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:26,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:26,951 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-20 08:59:26,957 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:27,019 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:27,019 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:27,025 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:27,025 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:27,025 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:59:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:27,032 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:27,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:27,049 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [834757136] [2019-11-20 08:59:27,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:27,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-20 08:59:27,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166946853] [2019-11-20 08:59:27,055 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-20 08:59:27,055 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:27,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-20 08:59:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:59:27,073 INFO L87 Difference]: Start difference. First operand 88 states. Second operand 3 states. [2019-11-20 08:59:27,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:27,292 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2019-11-20 08:59:27,293 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:59:27,294 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-20 08:59:27,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:27,306 INFO L225 Difference]: With dead ends: 84 [2019-11-20 08:59:27,307 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 08:59:27,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-20 08:59:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 08:59:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2019-11-20 08:59:27,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-20 08:59:27,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2019-11-20 08:59:27,364 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 10 [2019-11-20 08:59:27,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:27,365 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2019-11-20 08:59:27,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-20 08:59:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2019-11-20 08:59:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-20 08:59:27,367 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:27,367 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:27,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:27,570 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:27,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:27,571 INFO L82 PathProgramCache]: Analyzing trace with hash 370585341, now seen corresponding path program 1 times [2019-11-20 08:59:27,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:27,573 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [764128798] [2019-11-20 08:59:27,573 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:27,770 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:59:27,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:27,792 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:27,792 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:27,804 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:27,804 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:27,805 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:59:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:27,821 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:27,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:27,870 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [764128798] [2019-11-20 08:59:27,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:27,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:59:27,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348851455] [2019-11-20 08:59:27,872 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:59:27,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:27,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:59:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:27,873 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand 4 states. [2019-11-20 08:59:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:28,152 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2019-11-20 08:59:28,153 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:59:28,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-20 08:59:28,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:28,155 INFO L225 Difference]: With dead ends: 72 [2019-11-20 08:59:28,155 INFO L226 Difference]: Without dead ends: 72 [2019-11-20 08:59:28,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-20 08:59:28,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2019-11-20 08:59:28,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-11-20 08:59:28,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2019-11-20 08:59:28,168 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 10 [2019-11-20 08:59:28,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:28,169 INFO L462 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2019-11-20 08:59:28,169 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:59:28,169 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2019-11-20 08:59:28,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 08:59:28,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:28,172 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:28,374 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:28,374 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:28,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:28,375 INFO L82 PathProgramCache]: Analyzing trace with hash 455801065, now seen corresponding path program 1 times [2019-11-20 08:59:28,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:28,376 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [890929029] [2019-11-20 08:59:28,376 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:28,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:59:28,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:28,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:28,605 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:28,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:28,639 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [890929029] [2019-11-20 08:59:28,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:28,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2019-11-20 08:59:28,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160149491] [2019-11-20 08:59:28,641 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:59:28,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:28,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:59:28,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:59:28,641 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand 8 states. [2019-11-20 08:59:28,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:28,713 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2019-11-20 08:59:28,715 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:59:28,715 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2019-11-20 08:59:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:28,716 INFO L225 Difference]: With dead ends: 85 [2019-11-20 08:59:28,716 INFO L226 Difference]: Without dead ends: 85 [2019-11-20 08:59:28,717 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2019-11-20 08:59:28,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-20 08:59:28,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2019-11-20 08:59:28,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-20 08:59:28,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2019-11-20 08:59:28,726 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 16 [2019-11-20 08:59:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:28,727 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2019-11-20 08:59:28,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:59:28,727 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2019-11-20 08:59:28,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 08:59:28,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:28,728 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:28,928 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:28,929 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:28,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:28,929 INFO L82 PathProgramCache]: Analyzing trace with hash 455802506, now seen corresponding path program 1 times [2019-11-20 08:59:28,930 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:28,930 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1970169551] [2019-11-20 08:59:28,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:29,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:29,158 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-20 08:59:29,160 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:29,200 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:29,200 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-20 08:59:29,201 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:29,225 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:59:29,226 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:29,226 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2019-11-20 08:59:29,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:29,239 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:29,246 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 08:59:29,246 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970169551] [2019-11-20 08:59:29,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:29,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 2] imperfect sequences [] total 3 [2019-11-20 08:59:29,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002288462] [2019-11-20 08:59:29,247 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:59:29,247 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:29,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:59:29,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:29,248 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand 4 states. [2019-11-20 08:59:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:29,488 INFO L93 Difference]: Finished difference Result 81 states and 87 transitions. [2019-11-20 08:59:29,488 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:59:29,488 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-20 08:59:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:29,490 INFO L225 Difference]: With dead ends: 81 [2019-11-20 08:59:29,490 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 08:59:29,490 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:29,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 08:59:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 77. [2019-11-20 08:59:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 08:59:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2019-11-20 08:59:29,499 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 16 [2019-11-20 08:59:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:29,500 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2019-11-20 08:59:29,500 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:59:29,500 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2019-11-20 08:59:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-20 08:59:29,501 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:29,501 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:29,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:29,711 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:29,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:29,711 INFO L82 PathProgramCache]: Analyzing trace with hash 455802507, now seen corresponding path program 1 times [2019-11-20 08:59:29,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:29,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1433982083] [2019-11-20 08:59:29,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:29,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:29,921 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-20 08:59:29,923 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:29,937 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:29,937 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:29,948 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:29,948 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:29,949 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:59:29,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:29,960 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:30,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1433982083] [2019-11-20 08:59:30,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:30,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-20 08:59:30,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495397115] [2019-11-20 08:59:30,020 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:59:30,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:30,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:59:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:30,021 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand 4 states. [2019-11-20 08:59:30,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:30,297 INFO L93 Difference]: Finished difference Result 75 states and 79 transitions. [2019-11-20 08:59:30,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-20 08:59:30,298 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-20 08:59:30,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:30,299 INFO L225 Difference]: With dead ends: 75 [2019-11-20 08:59:30,300 INFO L226 Difference]: Without dead ends: 75 [2019-11-20 08:59:30,300 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:30,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-20 08:59:30,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-20 08:59:30,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 08:59:30,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-11-20 08:59:30,307 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 16 [2019-11-20 08:59:30,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:30,307 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-11-20 08:59:30,307 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:59:30,307 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-11-20 08:59:30,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 08:59:30,308 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:30,308 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:30,511 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:30,511 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:30,511 INFO L82 PathProgramCache]: Analyzing trace with hash -60455699, now seen corresponding path program 1 times [2019-11-20 08:59:30,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:30,512 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [588020095] [2019-11-20 08:59:30,512 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:30,712 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:59:30,713 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:30,728 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:30,728 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:30,732 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:30,732 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:30,732 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:59:30,770 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:30,770 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 08:59:30,771 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:30,790 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:59:30,791 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:30,792 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 08:59:30,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:30,800 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:30,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:30,819 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [588020095] [2019-11-20 08:59:30,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:30,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2019-11-20 08:59:30,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045905946] [2019-11-20 08:59:30,820 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-20 08:59:30,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:30,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-20 08:59:30,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-20 08:59:30,821 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 4 states. [2019-11-20 08:59:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:31,048 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2019-11-20 08:59:31,048 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-20 08:59:31,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2019-11-20 08:59:31,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:31,049 INFO L225 Difference]: With dead ends: 76 [2019-11-20 08:59:31,049 INFO L226 Difference]: Without dead ends: 76 [2019-11-20 08:59:31,049 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:59:31,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-20 08:59:31,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-11-20 08:59:31,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 08:59:31,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2019-11-20 08:59:31,054 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 18 [2019-11-20 08:59:31,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:31,055 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2019-11-20 08:59:31,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-20 08:59:31,055 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2019-11-20 08:59:31,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-20 08:59:31,055 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:31,055 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:31,256 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:31,256 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:31,256 INFO L82 PathProgramCache]: Analyzing trace with hash -60455698, now seen corresponding path program 1 times [2019-11-20 08:59:31,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:31,257 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [784339670] [2019-11-20 08:59:31,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:31,430 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 08:59:31,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:31,444 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:31,445 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:31,451 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:31,454 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:31,455 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:31,460 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:31,460 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:31,461 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 08:59:31,531 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:31,531 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 13 treesize of output 17 [2019-11-20 08:59:31,532 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:31,551 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:31,555 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 14 treesize of output 16 [2019-11-20 08:59:31,556 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:31,566 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:31,567 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 08:59:31,567 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:18 [2019-11-20 08:59:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:31,588 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:31,632 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:59:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:31,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [784339670] [2019-11-20 08:59:31,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:31,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2019-11-20 08:59:31,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219957980] [2019-11-20 08:59:31,922 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:59:31,922 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:31,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:59:31,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:59:31,923 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 8 states. [2019-11-20 08:59:32,303 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 34 [2019-11-20 08:59:32,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:32,834 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2019-11-20 08:59:32,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:59:32,835 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2019-11-20 08:59:32,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:32,836 INFO L225 Difference]: With dead ends: 75 [2019-11-20 08:59:32,836 INFO L226 Difference]: Without dead ends: 75 [2019-11-20 08:59:32,836 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:59:32,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-20 08:59:32,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-20 08:59:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-20 08:59:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2019-11-20 08:59:32,844 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 18 [2019-11-20 08:59:32,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:32,844 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2019-11-20 08:59:32,844 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:59:32,844 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2019-11-20 08:59:32,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 08:59:32,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:32,845 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:33,046 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:33,047 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash 575601121, now seen corresponding path program 1 times [2019-11-20 08:59:33,048 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:33,048 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [836551314] [2019-11-20 08:59:33,048 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:33,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:59:33,286 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:33,320 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:33,320 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 28 [2019-11-20 08:59:33,321 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:33,336 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:59:33,336 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:33,337 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:12, output treesize:11 [2019-11-20 08:59:33,375 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:33,375 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 30 [2019-11-20 08:59:33,376 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:33,389 INFO L567 ElimStorePlain]: treesize reduction 14, result has 44.0 percent of original size [2019-11-20 08:59:33,390 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:33,390 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:11 [2019-11-20 08:59:33,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:33,397 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:33,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [836551314] [2019-11-20 08:59:33,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:59:33,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 4 [2019-11-20 08:59:33,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064688378] [2019-11-20 08:59:33,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 08:59:33,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:33,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 08:59:33,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-20 08:59:33,437 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 5 states. [2019-11-20 08:59:33,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:33,698 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2019-11-20 08:59:33,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-20 08:59:33,699 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2019-11-20 08:59:33,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:33,700 INFO L225 Difference]: With dead ends: 77 [2019-11-20 08:59:33,700 INFO L226 Difference]: Without dead ends: 77 [2019-11-20 08:59:33,700 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2019-11-20 08:59:33,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-20 08:59:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 73. [2019-11-20 08:59:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-20 08:59:33,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2019-11-20 08:59:33,705 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 24 [2019-11-20 08:59:33,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:33,705 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2019-11-20 08:59:33,705 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 08:59:33,706 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2019-11-20 08:59:33,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-20 08:59:33,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:33,706 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:33,907 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:33,907 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:33,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:33,907 INFO L82 PathProgramCache]: Analyzing trace with hash 575601122, now seen corresponding path program 1 times [2019-11-20 08:59:33,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:33,908 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1604555185] [2019-11-20 08:59:33,908 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/bin/uautomizer/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:34,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:34,181 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 08:59:34,182 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:34,190 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:34,190 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:34,198 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:34,201 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:34,201 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:34,207 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:34,208 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:34,208 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 08:59:34,249 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:34,251 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 12 treesize of output 14 [2019-11-20 08:59:34,251 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:34,263 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:34,271 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:34,272 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 13 treesize of output 17 [2019-11-20 08:59:34,272 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:34,281 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:34,282 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 08:59:34,282 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:18 [2019-11-20 08:59:34,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:34,308 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:34,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:59:34,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:34,558 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1604555185] [2019-11-20 08:59:34,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:59:34,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2019-11-20 08:59:34,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222900130] [2019-11-20 08:59:34,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:59:34,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:34,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:59:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:59:34,559 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand 8 states. [2019-11-20 08:59:34,869 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 32 [2019-11-20 08:59:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:35,313 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2019-11-20 08:59:35,313 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-20 08:59:35,314 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-20 08:59:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:35,314 INFO L225 Difference]: With dead ends: 71 [2019-11-20 08:59:35,315 INFO L226 Difference]: Without dead ends: 71 [2019-11-20 08:59:35,315 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:59:35,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-20 08:59:35,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-20 08:59:35,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-20 08:59:35,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2019-11-20 08:59:35,322 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 24 [2019-11-20 08:59:35,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:35,323 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2019-11-20 08:59:35,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:59:35,323 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2019-11-20 08:59:35,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-20 08:59:35,324 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:35,324 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:35,527 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:35,527 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:35,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash 2012464647, now seen corresponding path program 1 times [2019-11-20 08:59:35,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:35,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1332258320] [2019-11-20 08:59:35,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:35,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:35,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-20 08:59:35,806 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:35,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:35,883 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:36,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:36,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1332258320] [2019-11-20 08:59:36,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:59:36,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2019-11-20 08:59:36,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581078422] [2019-11-20 08:59:36,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 08:59:36,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:36,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 08:59:36,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:59:36,143 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 11 states. [2019-11-20 08:59:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:36,330 INFO L93 Difference]: Finished difference Result 87 states and 89 transitions. [2019-11-20 08:59:36,331 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 08:59:36,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2019-11-20 08:59:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:36,332 INFO L225 Difference]: With dead ends: 87 [2019-11-20 08:59:36,332 INFO L226 Difference]: Without dead ends: 82 [2019-11-20 08:59:36,332 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2019-11-20 08:59:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-20 08:59:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 77. [2019-11-20 08:59:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-20 08:59:36,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2019-11-20 08:59:36,338 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 33 [2019-11-20 08:59:36,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:36,338 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2019-11-20 08:59:36,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 08:59:36,338 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2019-11-20 08:59:36,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 08:59:36,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:36,340 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:36,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:36,543 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:36,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:36,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1166325101, now seen corresponding path program 2 times [2019-11-20 08:59:36,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:36,544 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1505209330] [2019-11-20 08:59:36,544 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:36,705 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-20 08:59:36,705 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:59:36,706 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:59:36,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:36,753 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:36,812 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:36,812 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1505209330] [2019-11-20 08:59:36,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:36,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 6 [2019-11-20 08:59:36,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364570049] [2019-11-20 08:59:36,813 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-20 08:59:36,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:36,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-20 08:59:36,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-20 08:59:36,814 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand 7 states. [2019-11-20 08:59:37,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:37,253 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2019-11-20 08:59:37,253 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 08:59:37,253 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2019-11-20 08:59:37,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:37,254 INFO L225 Difference]: With dead ends: 79 [2019-11-20 08:59:37,254 INFO L226 Difference]: Without dead ends: 79 [2019-11-20 08:59:37,255 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:59:37,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-20 08:59:37,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2019-11-20 08:59:37,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-20 08:59:37,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2019-11-20 08:59:37,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 39 [2019-11-20 08:59:37,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:37,259 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2019-11-20 08:59:37,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-20 08:59:37,260 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2019-11-20 08:59:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-20 08:59:37,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:37,261 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:37,469 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:37,469 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:37,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:37,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1166325100, now seen corresponding path program 1 times [2019-11-20 08:59:37,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:37,471 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [457480567] [2019-11-20 08:59:37,471 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:37,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:37,799 INFO L255 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 08:59:37,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:37,875 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:37,876 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 08:59:38,205 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [457480567] [2019-11-20 08:59:38,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:59:38,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2019-11-20 08:59:38,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193760824] [2019-11-20 08:59:38,206 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 08:59:38,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:38,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 08:59:38,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2019-11-20 08:59:38,207 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand 13 states. [2019-11-20 08:59:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:38,512 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2019-11-20 08:59:38,512 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:59:38,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-20 08:59:38,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:38,513 INFO L225 Difference]: With dead ends: 90 [2019-11-20 08:59:38,513 INFO L226 Difference]: Without dead ends: 85 [2019-11-20 08:59:38,513 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2019-11-20 08:59:38,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-20 08:59:38,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2019-11-20 08:59:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 08:59:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-20 08:59:38,517 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 39 [2019-11-20 08:59:38,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:38,517 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-20 08:59:38,517 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 08:59:38,517 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-20 08:59:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-20 08:59:38,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:38,519 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 08:59:38,723 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:38,723 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:38,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:38,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1614296608, now seen corresponding path program 2 times [2019-11-20 08:59:38,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:38,724 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [837519992] [2019-11-20 08:59:38,724 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:39,121 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-20 08:59:39,121 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-20 08:59:39,124 INFO L255 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-20 08:59:39,126 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:39,138 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:39,138 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:39,142 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:39,143 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:39,143 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:59:39,199 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:39,199 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:39,683 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [837519992] [2019-11-20 08:59:39,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:39,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 7] imperfect sequences [] total 12 [2019-11-20 08:59:39,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478971870] [2019-11-20 08:59:39,683 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 08:59:39,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:39,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 08:59:39,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-20 08:59:39,684 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 13 states. [2019-11-20 08:59:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:40,699 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2019-11-20 08:59:40,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 08:59:40,699 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2019-11-20 08:59:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:40,700 INFO L225 Difference]: With dead ends: 83 [2019-11-20 08:59:40,700 INFO L226 Difference]: Without dead ends: 83 [2019-11-20 08:59:40,701 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2019-11-20 08:59:40,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-20 08:59:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-20 08:59:40,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-20 08:59:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2019-11-20 08:59:40,704 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 45 [2019-11-20 08:59:40,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:40,704 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2019-11-20 08:59:40,704 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 08:59:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2019-11-20 08:59:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 08:59:40,706 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:40,706 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 08:59:40,906 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:40,906 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:40,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:40,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1584852694, now seen corresponding path program 1 times [2019-11-20 08:59:40,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:40,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1881645718] [2019-11-20 08:59:40,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:41,248 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-20 08:59:41,249 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:41,257 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:41,257 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:41,262 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:41,262 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:41,262 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:59:41,331 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:41,332 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:41,822 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1881645718] [2019-11-20 08:59:41,822 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:41,822 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 13 [2019-11-20 08:59:41,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105132239] [2019-11-20 08:59:41,822 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-20 08:59:41,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:41,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-20 08:59:41,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2019-11-20 08:59:41,823 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 14 states. [2019-11-20 08:59:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:43,146 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2019-11-20 08:59:43,146 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 08:59:43,146 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2019-11-20 08:59:43,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:43,147 INFO L225 Difference]: With dead ends: 81 [2019-11-20 08:59:43,147 INFO L226 Difference]: Without dead ends: 81 [2019-11-20 08:59:43,148 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2019-11-20 08:59:43,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-20 08:59:43,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2019-11-20 08:59:43,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-20 08:59:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2019-11-20 08:59:43,151 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 51 [2019-11-20 08:59:43,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:43,151 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2019-11-20 08:59:43,151 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-20 08:59:43,151 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2019-11-20 08:59:43,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 08:59:43,153 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:43,153 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 08:59:43,357 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:43,357 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:43,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:43,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1584852695, now seen corresponding path program 1 times [2019-11-20 08:59:43,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:43,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [232865922] [2019-11-20 08:59:43,358 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:43,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:43,692 INFO L255 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-20 08:59:43,696 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:43,701 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 08:59:43,702 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:43,707 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:43,708 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:43,708 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 08:59:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:43,752 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:43,834 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:43,834 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [232865922] [2019-11-20 08:59:43,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 08:59:43,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 7 [2019-11-20 08:59:43,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632160769] [2019-11-20 08:59:43,835 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-20 08:59:43,835 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-20 08:59:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-11-20 08:59:43,836 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand 8 states. [2019-11-20 08:59:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 08:59:44,351 INFO L93 Difference]: Finished difference Result 78 states and 80 transitions. [2019-11-20 08:59:44,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 08:59:44,361 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2019-11-20 08:59:44,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 08:59:44,362 INFO L225 Difference]: With dead ends: 78 [2019-11-20 08:59:44,362 INFO L226 Difference]: Without dead ends: 78 [2019-11-20 08:59:44,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 08:59:44,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2019-11-20 08:59:44,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2019-11-20 08:59:44,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-20 08:59:44,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2019-11-20 08:59:44,365 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 51 [2019-11-20 08:59:44,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 08:59:44,365 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2019-11-20 08:59:44,365 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-20 08:59:44,365 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2019-11-20 08:59:44,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 08:59:44,366 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 08:59:44,366 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 08:59:44,567 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 08:59:44,567 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 08:59:44,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 08:59:44,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1584852657, now seen corresponding path program 1 times [2019-11-20 08:59:44,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 08:59:44,568 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1675147843] [2019-11-20 08:59:44,568 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 08:59:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 08:59:45,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-20 08:59:45,040 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 08:59:45,051 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 5 treesize of output 3 [2019-11-20 08:59:45,051 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,052 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,052 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,052 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:9, output treesize:3 [2019-11-20 08:59:45,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2019-11-20 08:59:45,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,061 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,061 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-20 08:59:45,092 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,092 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 19 treesize of output 41 [2019-11-20 08:59:45,092 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,116 INFO L567 ElimStorePlain]: treesize reduction 14, result has 60.0 percent of original size [2019-11-20 08:59:45,117 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,117 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-20 08:59:45,136 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 08:59:45,137 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,149 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,149 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,149 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:32 [2019-11-20 08:59:45,175 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:45,176 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 08:59:45,176 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,189 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,189 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,189 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:32 [2019-11-20 08:59:45,243 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,244 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 72 [2019-11-20 08:59:45,245 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,245 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,296 INFO L567 ElimStorePlain]: treesize reduction 11, result has 82.0 percent of original size [2019-11-20 08:59:45,296 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:45,297 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:71, output treesize:50 [2019-11-20 08:59:45,471 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,471 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 101 [2019-11-20 08:59:45,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,472 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:59:45,473 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,474 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,475 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:59:45,476 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,477 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,478 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,479 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:45,556 INFO L567 ElimStorePlain]: treesize reduction 42, result has 53.8 percent of original size [2019-11-20 08:59:45,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,557 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:45,557 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:54, output treesize:49 [2019-11-20 08:59:45,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,589 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:45,599 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:45,617 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 53 [2019-11-20 08:59:45,617 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,623 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:45,679 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:45,680 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 61 treesize of output 131 [2019-11-20 08:59:45,681 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:45,785 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2019-11-20 08:59:45,786 INFO L567 ElimStorePlain]: treesize reduction 84, result has 56.0 percent of original size [2019-11-20 08:59:45,786 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-11-20 08:59:45,787 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:113, output treesize:104 [2019-11-20 08:59:46,183 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:46,197 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:46,200 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:46,219 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 54 [2019-11-20 08:59:46,220 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:46,226 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:46,227 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 08:59:54,400 WARN L191 SmtUtils]: Spent 8.17 s on a formula simplification that was a NOOP. DAG size: 44 [2019-11-20 08:59:54,401 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,401 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 150 [2019-11-20 08:59:54,403 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:54,522 WARN L191 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 44 [2019-11-20 08:59:54,522 INFO L567 ElimStorePlain]: treesize reduction 134, result has 42.7 percent of original size [2019-11-20 08:59:54,523 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 2 xjuncts. [2019-11-20 08:59:54,523 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:130, output treesize:100 [2019-11-20 08:59:54,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 08:59:54,531 INFO L392 ElimStorePlain]: Different costs {4=[v_prenex_8], 7=[|#memory_$Pointer$.base|]} [2019-11-20 08:59:54,569 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,569 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 4 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 57 [2019-11-20 08:59:54,570 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:54,617 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,669 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,669 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 6 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 82 [2019-11-20 08:59:54,670 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 08:59:54,670 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:54,685 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,685 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2019-11-20 08:59:54,686 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 6 variables, input treesize:137, output treesize:37 [2019-11-20 08:59:54,795 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 08:59:54,795 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 08:59:54,916 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:54,919 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:54,919 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:54,920 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:14 [2019-11-20 08:59:55,911 WARN L191 SmtUtils]: Spent 896.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 78 [2019-11-20 08:59:56,159 WARN L191 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2019-11-20 08:59:56,422 WARN L191 SmtUtils]: Spent 262.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-20 08:59:56,732 WARN L191 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2019-11-20 08:59:57,123 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:57,142 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 08:59:57,143 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-20 08:59:57,143 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:68, output treesize:82 [2019-11-20 08:59:57,290 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 08:59:57,403 WARN L191 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2019-11-20 08:59:57,404 INFO L567 ElimStorePlain]: treesize reduction 85, result has 25.4 percent of original size [2019-11-20 08:59:57,404 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 08:59:57,404 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:92, output treesize:28 [2019-11-20 08:59:57,501 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-20 08:59:57,501 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1675147843] [2019-11-20 08:59:57,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 08:59:57,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 25 [2019-11-20 08:59:57,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813198197] [2019-11-20 08:59:57,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-20 08:59:57,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 08:59:57,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-20 08:59:57,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2019-11-20 08:59:57,504 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand 26 states. [2019-11-20 09:00:05,407 WARN L191 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 42 [2019-11-20 09:00:06,396 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 48 [2019-11-20 09:00:08,594 WARN L191 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 51 [2019-11-20 09:00:08,886 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-11-20 09:00:09,350 WARN L191 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2019-11-20 09:00:09,839 WARN L191 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 52 [2019-11-20 09:00:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 09:00:10,466 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2019-11-20 09:00:10,466 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-20 09:00:10,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 51 [2019-11-20 09:00:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 09:00:10,467 INFO L225 Difference]: With dead ends: 89 [2019-11-20 09:00:10,467 INFO L226 Difference]: Without dead ends: 89 [2019-11-20 09:00:10,468 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 75 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=290, Invalid=1348, Unknown=2, NotChecked=0, Total=1640 [2019-11-20 09:00:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-20 09:00:10,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2019-11-20 09:00:10,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-20 09:00:10,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2019-11-20 09:00:10,471 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 51 [2019-11-20 09:00:10,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 09:00:10,471 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2019-11-20 09:00:10,471 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-20 09:00:10,471 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2019-11-20 09:00:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-20 09:00:10,472 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 09:00:10,472 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 09:00:10,676 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:00:10,676 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr8REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr7REQUIRES_VIOLATION, mainErr16ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION, mainErr17ENSURES_VIOLATIONMEMORY_LEAK, dll_circular_createErr3REQUIRES_VIOLATION, dll_circular_createErr14REQUIRES_VIOLATION, dll_circular_createErr2REQUIRES_VIOLATION, dll_circular_createErr15REQUIRES_VIOLATION, dll_circular_createErr4REQUIRES_VIOLATION, dll_circular_createErr13REQUIRES_VIOLATION, dll_circular_createErr0REQUIRES_VIOLATION, dll_circular_createErr12REQUIRES_VIOLATION, dll_circular_createErr10REQUIRES_VIOLATION, dll_circular_createErr1REQUIRES_VIOLATION, dll_circular_createErr11REQUIRES_VIOLATION, dll_circular_createErr9REQUIRES_VIOLATION, dll_circular_createErr8REQUIRES_VIOLATION, dll_circular_createErr5REQUIRES_VIOLATION, dll_circular_createErr7REQUIRES_VIOLATION, dll_circular_createErr6REQUIRES_VIOLATION]=== [2019-11-20 09:00:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 09:00:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1584852656, now seen corresponding path program 1 times [2019-11-20 09:00:10,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 09:00:10,677 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [911008848] [2019-11-20 09:00:10,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_2350c893-bb68-4f4f-b676-66ebda9aa6e4/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 09:00:11,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 09:00:11,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-20 09:00:11,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 09:00:11,298 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 09:00:11,298 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,307 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,309 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 09:00:11,310 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,317 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,317 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,317 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:19, output treesize:17 [2019-11-20 09:00:11,344 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,345 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 12 treesize of output 14 [2019-11-20 09:00:11,345 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,363 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,370 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,371 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 13 treesize of output 17 [2019-11-20 09:00:11,371 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,382 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,383 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,383 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:33, output treesize:24 [2019-11-20 09:00:11,407 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 09:00:11,407 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,435 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,440 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 13 treesize of output 9 [2019-11-20 09:00:11,440 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,462 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,462 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,462 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:50, output treesize:42 [2019-11-20 09:00:11,506 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,507 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 09:00:11,507 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,539 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,543 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,544 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 09:00:11,544 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,562 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,562 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,562 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:72, output treesize:42 [2019-11-20 09:00:11,570 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 26 [2019-11-20 09:00:11,571 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,594 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,598 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,598 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 38 [2019-11-20 09:00:11,599 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,620 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,620 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,620 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:90, output treesize:70 [2019-11-20 09:00:11,715 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:11,716 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,731 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,731 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 64 [2019-11-20 09:00:11,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:11,733 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:11,733 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:11,829 INFO L567 ElimStorePlain]: treesize reduction 12, result has 86.5 percent of original size [2019-11-20 09:00:11,838 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:11,839 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:11,854 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:11,854 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 46 [2019-11-20 09:00:11,855 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:11,938 INFO L567 ElimStorePlain]: treesize reduction 16, result has 82.0 percent of original size [2019-11-20 09:00:11,938 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:11,939 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:11,939 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:86, output treesize:73 [2019-11-20 09:00:11,940 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:12,027 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:12,043 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:12,056 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 79 [2019-11-20 09:00:12,057 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:12,065 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:12,069 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:12,081 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:12,081 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 100 [2019-11-20 09:00:12,082 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:12,202 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 60 [2019-11-20 09:00:12,202 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:12,219 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:12,242 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:12,269 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:12,270 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 91 treesize of output 111 [2019-11-20 09:00:12,271 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:12,280 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:12,288 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 72 [2019-11-20 09:00:12,288 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:12,455 WARN L191 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2019-11-20 09:00:12,455 INFO L567 ElimStorePlain]: treesize reduction 44, result has 78.0 percent of original size [2019-11-20 09:00:12,456 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 09:00:12,456 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:177, output treesize:159 [2019-11-20 09:00:12,953 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:12,991 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,007 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,012 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,016 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,108 INFO L237 Elim1Store]: Index analysis took 122 ms [2019-11-20 09:00:13,145 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:13,145 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 130 treesize of output 127 [2019-11-20 09:00:13,146 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:13,160 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,162 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,165 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,186 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 98 [2019-11-20 09:00:13,186 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:13,430 WARN L191 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2019-11-20 09:00:13,430 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:13,464 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,467 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,470 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,543 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,553 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:13,583 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:13,583 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 115 treesize of output 116 [2019-11-20 09:00:13,585 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:13,597 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,600 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,603 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,614 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 83 [2019-11-20 09:00:13,615 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:13,843 WARN L191 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2019-11-20 09:00:13,843 INFO L567 ElimStorePlain]: treesize reduction 44, result has 79.9 percent of original size [2019-11-20 09:00:13,844 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 09:00:13,844 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 3 variables, input treesize:235, output treesize:175 [2019-11-20 09:00:13,846 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:13,856 INFO L392 ElimStorePlain]: Different costs {10=[v_prenex_10, v_prenex_9], 15=[|#memory_$Pointer$.base|, |#memory_$Pointer$.offset|]} [2019-11-20 09:00:13,870 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,872 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,873 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:13,874 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 66 [2019-11-20 09:00:13,875 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:13,978 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 67 [2019-11-20 09:00:13,979 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:13,987 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,989 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:13,989 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:13,990 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 37 [2019-11-20 09:00:13,990 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:14,071 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:14,077 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:14,078 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:14,079 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:14,080 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:14,097 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:14,097 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 112 treesize of output 92 [2019-11-20 09:00:14,098 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,099 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,100 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,101 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 09:00:14,324 WARN L191 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 47 [2019-11-20 09:00:14,325 INFO L567 ElimStorePlain]: treesize reduction 12, result has 88.5 percent of original size [2019-11-20 09:00:14,336 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:14,338 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-20 09:00:14,339 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:14,343 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:14,343 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 39 [2019-11-20 09:00:14,344 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:14,422 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:14,423 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 4 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-20 09:00:14,423 INFO L221 ElimStorePlain]: Needed 5 recursive calls to eliminate 5 variables, input treesize:199, output treesize:52 [2019-11-20 09:00:14,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,675 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,676 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:14,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-20 09:00:14,758 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 09:00:15,281 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:15,282 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 09:00:15,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 09:00:15,296 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,302 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 09:00:15,309 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:15,317 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,323 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,327 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:15,432 WARN L191 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2019-11-20 09:00:15,432 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:15,437 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,447 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,455 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,462 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,469 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,480 INFO L496 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:15,548 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:15,549 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 10 dim-0 vars, and 6 xjuncts. [2019-11-20 09:00:15,550 INFO L221 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:343, output treesize:199 [2019-11-20 09:00:21,727 WARN L191 SmtUtils]: Spent 5.80 s on a formula simplification that was a NOOP. DAG size: 113 [2019-11-20 09:00:23,293 WARN L191 SmtUtils]: Spent 1.56 s on a formula simplification that was a NOOP. DAG size: 82 [2019-11-20 09:00:24,951 WARN L191 SmtUtils]: Spent 1.66 s on a formula simplification that was a NOOP. DAG size: 86 [2019-11-20 09:00:26,908 WARN L191 SmtUtils]: Spent 1.96 s on a formula simplification that was a NOOP. DAG size: 86 [2019-11-20 09:00:28,704 WARN L191 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 41 [2019-11-20 09:00:28,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:28,705 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 09:00:28,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 09:00:28,725 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:28,739 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 09:00:28,820 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 09:00:28,958 INFO L496 ElimStorePlain]: Start of recursive call 5: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:28,979 INFO L496 ElimStorePlain]: Start of recursive call 6: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:29,012 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:30,306 WARN L191 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 94 [2019-11-20 09:00:30,306 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:30,318 INFO L496 ElimStorePlain]: Start of recursive call 8: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:30,381 INFO L496 ElimStorePlain]: Start of recursive call 9: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:30,422 INFO L496 ElimStorePlain]: Start of recursive call 10: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:30,505 INFO L496 ElimStorePlain]: Start of recursive call 11: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:30,548 INFO L496 ElimStorePlain]: Start of recursive call 12: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:30,647 INFO L496 ElimStorePlain]: Start of recursive call 13: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-20 09:00:36,445 WARN L191 SmtUtils]: Spent 5.80 s on a formula simplification that was a NOOP. DAG size: 152 [2019-11-20 09:00:36,445 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 09:00:36,446 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: 10 dim-0 vars, and 6 xjuncts. [2019-11-20 09:00:36,446 INFO L221 ElimStorePlain]: Needed 13 recursive calls to eliminate 2 variables, input treesize:823, output treesize:1143 [2019-11-20 09:00:39,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 09:00:39,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:39,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:39,083 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 09:00:39,156 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:39,260 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:39,337 INFO L496 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:39,370 INFO L496 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,437 WARN L191 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 62 DAG size of output: 46 [2019-11-20 09:00:40,437 INFO L567 ElimStorePlain]: treesize reduction 744, result has 56.1 percent of original size [2019-11-20 09:00:40,463 INFO L496 ElimStorePlain]: Start of recursive call 6: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,513 INFO L496 ElimStorePlain]: Start of recursive call 7: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,539 INFO L496 ElimStorePlain]: Start of recursive call 8: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,545 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:40,561 INFO L496 ElimStorePlain]: Start of recursive call 9: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,569 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-20 09:00:40,578 INFO L496 ElimStorePlain]: Start of recursive call 10: End of recursive call: and 1 xjuncts. [2019-11-20 09:00:40,779 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 09:00:40,779 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: no XNF at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.eliminateOne(ElimStorePlain.java:553) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:466) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 09:00:40,782 INFO L168 Benchmark]: Toolchain (without parser) took 75648.70 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 236.5 MB). Free memory was 939.3 MB in the beginning and 1.0 GB in the end (delta: -74.1 MB). Peak memory consumption was 162.4 MB. Max. memory is 11.5 GB. [2019-11-20 09:00:40,782 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 09:00:40,783 INFO L168 Benchmark]: CACSL2BoogieTranslator took 572.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 09:00:40,783 INFO L168 Benchmark]: Boogie Preprocessor took 94.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 09:00:40,783 INFO L168 Benchmark]: RCFGBuilder took 778.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 11.5 GB. [2019-11-20 09:00:40,784 INFO L168 Benchmark]: TraceAbstraction took 74199.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 97.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 37.3 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. [2019-11-20 09:00:40,785 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 1.0 GB. Free memory is still 966.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 572.44 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 939.3 MB in the beginning and 1.1 GB in the end (delta: -183.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 94.52 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * RCFGBuilder took 778.42 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 66.7 MB). Peak memory consumption was 66.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 74199.76 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 97.5 MB). Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 37.3 MB). Peak memory consumption was 134.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: no XNF de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: no XNF: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:244) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...