./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 678e0110 Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 86b203c3a804c103d90401bd32cfcff28939b920 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported --- Real Ultimate output --- Skipped default analysis because property is memsafety ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 01:00:06,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 01:00:06,933 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 01:00:06,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 01:00:06,944 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 01:00:06,945 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 01:00:06,947 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 01:00:06,949 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 01:00:06,950 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 01:00:06,951 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 01:00:06,952 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 01:00:06,953 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 01:00:06,954 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 01:00:06,955 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 01:00:06,956 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 01:00:06,957 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 01:00:06,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 01:00:06,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 01:00:06,960 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 01:00:06,962 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 01:00:06,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 01:00:06,964 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 01:00:06,965 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 01:00:06,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 01:00:06,969 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 01:00:06,969 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 01:00:06,969 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 01:00:06,970 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 01:00:06,971 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 01:00:06,972 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 01:00:06,972 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 01:00:06,972 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 01:00:06,973 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 01:00:06,974 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 01:00:06,975 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 01:00:06,975 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 01:00:06,976 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 01:00:06,976 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 01:00:06,976 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 01:00:06,977 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 01:00:06,978 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 01:00:06,978 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-20 01:00:06,991 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 01:00:06,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 01:00:06,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 01:00:06,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 01:00:06,993 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 01:00:06,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 01:00:06,993 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 01:00:06,994 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-20 01:00:06,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 01:00:06,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 01:00:06,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 01:00:06,994 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-20 01:00:06,995 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-20 01:00:06,995 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-20 01:00:06,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 01:00:06,995 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 01:00:06,995 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 01:00:06,996 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 01:00:06,996 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 01:00:06,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 01:00:06,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 01:00:06,997 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 01:00:06,997 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 01:00:06,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 01:00:06,997 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 01:00:06,998 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 01:00:06,998 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 01:00:06,998 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 01:00:06,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 01:00:06,998 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_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 -> 86b203c3a804c103d90401bd32cfcff28939b920 [2019-11-20 01:00:07,129 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 01:00:07,138 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 01:00:07,141 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 01:00:07,142 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 01:00:07,143 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 01:00:07,143 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2019-11-20 01:00:07,191 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/data/bc5f40a04/4ecaf1f7fb544062a3c2cd347c563d69/FLAG5e44b2d3b [2019-11-20 01:00:07,592 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 01:00:07,593 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2019-11-20 01:00:07,606 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/data/bc5f40a04/4ecaf1f7fb544062a3c2cd347c563d69/FLAG5e44b2d3b [2019-11-20 01:00:07,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/bin/uautomizer/data/bc5f40a04/4ecaf1f7fb544062a3c2cd347c563d69 [2019-11-20 01:00:07,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 01:00:07,620 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-20 01:00:07,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 01:00:07,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 01:00:07,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 01:00:07,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:00:07" (1/1) ... [2019-11-20 01:00:07,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@628b2886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:07, skipping insertion in model container [2019-11-20 01:00:07,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 01:00:07" (1/1) ... [2019-11-20 01:00:07,634 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 01:00:07,666 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 01:00:08,013 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:00:08,021 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 01:00:08,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 01:00:08,105 INFO L192 MainTranslator]: Completed translation [2019-11-20 01:00:08,105 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08 WrapperNode [2019-11-20 01:00:08,105 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 01:00:08,106 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 01:00:08,106 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 01:00:08,106 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 01:00:08,118 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,147 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,149 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... [2019-11-20 01:00:08,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 01:00:08,158 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 01:00:08,158 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 01:00:08,159 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 01:00:08,159 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:00:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-20 01:00:08,221 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 01:00:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-20 01:00:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-20 01:00:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-20 01:00:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2019-11-20 01:00:08,222 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-20 01:00:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-20 01:00:08,223 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-20 01:00:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-20 01:00:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-20 01:00:08,224 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-20 01:00:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-20 01:00:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-20 01:00:08,225 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-20 01:00:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-20 01:00:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-20 01:00:08,226 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-20 01:00:08,227 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-20 01:00:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-20 01:00:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-20 01:00:08,228 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-20 01:00:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-20 01:00:08,229 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-20 01:00:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-20 01:00:08,230 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-20 01:00:08,231 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-20 01:00:08,232 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-20 01:00:08,233 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-20 01:00:08,234 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-20 01:00:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-20 01:00:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-20 01:00:08,235 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-20 01:00:08,240 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-20 01:00:08,240 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-20 01:00:08,240 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-20 01:00:08,241 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-20 01:00:08,241 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-20 01:00:08,242 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-20 01:00:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-20 01:00:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-20 01:00:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-20 01:00:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-20 01:00:08,243 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-20 01:00:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-20 01:00:08,244 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-20 01:00:08,245 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-20 01:00:08,246 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-20 01:00:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-20 01:00:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-20 01:00:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-20 01:00:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-20 01:00:08,247 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-20 01:00:08,248 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-20 01:00:08,249 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2019-11-20 01:00:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 01:00:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-20 01:00:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-20 01:00:08,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-20 01:00:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 01:00:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-20 01:00:08,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 01:00:08,634 INFO L689 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-20 01:00:08,788 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 01:00:08,789 INFO L285 CfgBuilder]: Removed 0 assume(true) statements. [2019-11-20 01:00:08,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:00:08 BoogieIcfgContainer [2019-11-20 01:00:08,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 01:00:08,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 01:00:08,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 01:00:08,794 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 01:00:08,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 01:00:07" (1/3) ... [2019-11-20 01:00:08,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a296572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:00:08, skipping insertion in model container [2019-11-20 01:00:08,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 01:00:08" (2/3) ... [2019-11-20 01:00:08,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a296572 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 01:00:08, skipping insertion in model container [2019-11-20 01:00:08,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 01:00:08" (3/3) ... [2019-11-20 01:00:08,798 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-1.i [2019-11-20 01:00:08,806 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 01:00:08,813 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 15 error locations. [2019-11-20 01:00:08,824 INFO L249 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2019-11-20 01:00:08,842 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 01:00:08,842 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-20 01:00:08,842 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 01:00:08,843 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 01:00:08,843 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 01:00:08,843 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 01:00:08,843 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 01:00:08,844 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 01:00:08,859 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2019-11-20 01:00:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 01:00:08,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:00:08,869 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:00:08,869 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:00:08,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:00:08,874 INFO L82 PathProgramCache]: Analyzing trace with hash 975324898, now seen corresponding path program 1 times [2019-11-20 01:00:08,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:00:08,885 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1233310599] [2019-11-20 01:00:08,885 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:00:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:00:09,110 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 01:00:09,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:00:09,178 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 01:00:09,178 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:09,186 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:09,187 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:00:09,187 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:00:09,457 WARN L191 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2019-11-20 01:00:09,458 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:09,458 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 01:00:09,461 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:09,489 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 01:00:09,490 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 01:00:09,490 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:15 [2019-11-20 01:00:09,521 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 01:00:09,521 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:00:13,962 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 01:00:13,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1233310599] [2019-11-20 01:00:13,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:00:13,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2019-11-20 01:00:13,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034378529] [2019-11-20 01:00:13,972 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 01:00:13,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:00:13,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 01:00:13,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=172, Unknown=1, NotChecked=0, Total=210 [2019-11-20 01:00:13,988 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 15 states. [2019-11-20 01:00:20,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:00:20,713 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2019-11-20 01:00:20,713 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-20 01:00:20,715 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2019-11-20 01:00:20,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:00:20,722 INFO L225 Difference]: With dead ends: 43 [2019-11-20 01:00:20,723 INFO L226 Difference]: Without dead ends: 37 [2019-11-20 01:00:20,724 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=75, Invalid=304, Unknown=1, NotChecked=0, Total=380 [2019-11-20 01:00:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-20 01:00:20,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-20 01:00:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-20 01:00:20,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-20 01:00:20,760 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 19 [2019-11-20 01:00:20,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:00:20,762 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-20 01:00:20,762 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 01:00:20,762 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-20 01:00:20,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-20 01:00:20,763 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:00:20,764 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:00:20,966 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:00:20,967 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:00:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:00:20,967 INFO L82 PathProgramCache]: Analyzing trace with hash 975324899, now seen corresponding path program 1 times [2019-11-20 01:00:20,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:00:20,968 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1900510043] [2019-11-20 01:00:20,968 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:00:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:00:21,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-20 01:00:21,151 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:00:21,160 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 01:00:21,160 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:21,167 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:21,171 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 01:00:21,171 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:21,177 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:21,178 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:00:21,178 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:16, output treesize:14 [2019-11-20 01:00:21,307 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:21,308 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 01:00:21,308 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:21,324 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:21,331 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 01:00:21,332 INFO L496 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2019-11-20 01:00:21,340 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:00:21,341 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 01:00:21,342 INFO L221 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:27, output treesize:18 [2019-11-20 01:00:21,394 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 01:00:21,394 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:00:21,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:00:21,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:00:21,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:00:21,704 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:00:21,706 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:00:21,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:00:21,709 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:00:21,711 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-11-20 01:00:22,814 WARN L191 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2019-11-20 01:00:22,823 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:00:23,640 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 01:00:23,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1900510043] [2019-11-20 01:00:23,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:00:23,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2019-11-20 01:00:23,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428243366] [2019-11-20 01:00:23,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-20 01:00:23,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:00:23,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-20 01:00:23,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2019-11-20 01:00:23,643 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2019-11-20 01:00:31,272 WARN L191 SmtUtils]: Spent 2.14 s on a formula simplification that was a NOOP. DAG size: 49 [2019-11-20 01:00:38,553 WARN L191 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 56 [2019-11-20 01:00:41,910 WARN L191 SmtUtils]: Spent 2.24 s on a formula simplification that was a NOOP. DAG size: 51 [2019-11-20 01:00:46,468 WARN L191 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2019-11-20 01:00:58,308 WARN L191 SmtUtils]: Spent 2.83 s on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2019-11-20 01:01:06,037 WARN L191 SmtUtils]: Spent 1.27 s on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2019-11-20 01:01:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:01:23,889 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-11-20 01:01:23,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 01:01:23,890 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2019-11-20 01:01:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:01:23,891 INFO L225 Difference]: With dead ends: 32 [2019-11-20 01:01:23,891 INFO L226 Difference]: Without dead ends: 32 [2019-11-20 01:01:23,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=86, Invalid=375, Unknown=1, NotChecked=0, Total=462 [2019-11-20 01:01:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-11-20 01:01:23,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-11-20 01:01:23,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-20 01:01:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-11-20 01:01:23,897 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 19 [2019-11-20 01:01:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:01:23,898 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-11-20 01:01:23,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-20 01:01:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-11-20 01:01:23,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-20 01:01:23,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:01:23,899 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, 1, 1, 1] [2019-11-20 01:01:24,102 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:24,103 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:01:24,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:01:24,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1236254071, now seen corresponding path program 1 times [2019-11-20 01:01:24,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:01:24,104 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [974973477] [2019-11-20 01:01:24,104 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:01:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:01:24,296 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-20 01:01:24,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:01:24,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:24,397 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:01:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:24,508 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [974973477] [2019-11-20 01:01:24,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 01:01:24,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2019-11-20 01:01:24,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820230007] [2019-11-20 01:01:24,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-20 01:01:24,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:01:24,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-20 01:01:24,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-20 01:01:24,509 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2019-11-20 01:01:24,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:01:24,674 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-20 01:01:24,674 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 01:01:24,674 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2019-11-20 01:01:24,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:01:24,675 INFO L225 Difference]: With dead ends: 31 [2019-11-20 01:01:24,676 INFO L226 Difference]: Without dead ends: 31 [2019-11-20 01:01:24,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2019-11-20 01:01:24,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-20 01:01:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-20 01:01:24,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 01:01:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-20 01:01:24,680 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 27 [2019-11-20 01:01:24,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:01:24,680 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-20 01:01:24,681 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-20 01:01:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-20 01:01:24,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-20 01:01:24,681 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:01:24,682 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, 1, 1, 1, 1, 1] [2019-11-20 01:01:24,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:24,886 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:01:24,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:01:24,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1665781067, now seen corresponding path program 1 times [2019-11-20 01:01:24,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:01:24,887 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [321503438] [2019-11-20 01:01:24,887 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:01:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:01:25,064 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 01:01:25,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:01:25,092 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 01:01:25,092 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,095 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,095 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,096 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2019-11-20 01:01:25,132 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-20 01:01:25,133 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,136 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,136 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,136 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:7 [2019-11-20 01:01:25,143 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-20 01:01:25,144 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,146 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,147 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,147 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2019-11-20 01:01:25,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:25,175 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:01:25,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:25,245 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [321503438] [2019-11-20 01:01:25,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:01:25,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2019-11-20 01:01:25,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780860778] [2019-11-20 01:01:25,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 01:01:25,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:01:25,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 01:01:25,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-11-20 01:01:25,246 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 10 states. [2019-11-20 01:01:25,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:01:25,400 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-11-20 01:01:25,403 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-20 01:01:25,403 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2019-11-20 01:01:25,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:01:25,404 INFO L225 Difference]: With dead ends: 30 [2019-11-20 01:01:25,404 INFO L226 Difference]: Without dead ends: 30 [2019-11-20 01:01:25,404 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2019-11-20 01:01:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-20 01:01:25,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-11-20 01:01:25,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-20 01:01:25,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-11-20 01:01:25,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 29 [2019-11-20 01:01:25,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:01:25,409 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-11-20 01:01:25,409 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 01:01:25,409 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-11-20 01:01:25,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-20 01:01:25,413 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:01:25,414 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, 1, 1, 1, 1, 1, 1] [2019-11-20 01:01:25,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:25,622 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:01:25,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:01:25,622 INFO L82 PathProgramCache]: Analyzing trace with hash 99605601, now seen corresponding path program 1 times [2019-11-20 01:01:25,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:01:25,623 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1922232240] [2019-11-20 01:01:25,623 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:01:25,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:01:25,797 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 01:01:25,800 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:01:25,852 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2019-11-20 01:01:25,852 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,861 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,861 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 01:01:25,861 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:11 [2019-11-20 01:01:25,907 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2019-11-20 01:01:25,907 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,913 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,914 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,914 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:11 [2019-11-20 01:01:25,935 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2019-11-20 01:01:25,936 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,946 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:25,946 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:25,947 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2019-11-20 01:01:25,996 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:25,996 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:01:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:26,163 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1922232240] [2019-11-20 01:01:26,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 01:01:26,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 16 [2019-11-20 01:01:26,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591459604] [2019-11-20 01:01:26,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-20 01:01:26,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:01:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-20 01:01:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2019-11-20 01:01:26,165 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 17 states. [2019-11-20 01:01:26,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:01:26,630 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-20 01:01:26,630 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-20 01:01:26,630 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 30 [2019-11-20 01:01:26,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:01:26,631 INFO L225 Difference]: With dead ends: 29 [2019-11-20 01:01:26,631 INFO L226 Difference]: Without dead ends: 29 [2019-11-20 01:01:26,631 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2019-11-20 01:01:26,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-20 01:01:26,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-20 01:01:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-20 01:01:26,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-20 01:01:26,636 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 30 [2019-11-20 01:01:26,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:01:26,637 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-20 01:01:26,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-20 01:01:26,637 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-20 01:01:26,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-20 01:01:26,637 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:01:26,638 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, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:01:26,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:26,838 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:01:26,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:01:26,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1207193587, now seen corresponding path program 1 times [2019-11-20 01:01:26,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:01:26,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1133804631] [2019-11-20 01:01:26,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:01:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:01:27,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-20 01:01:27,011 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:01:27,014 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 01:01:27,015 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,016 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:27,016 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,017 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:01:27,110 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:27,110 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 01:01:27,111 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,130 INFO L567 ElimStorePlain]: treesize reduction 14, result has 51.7 percent of original size [2019-11-20 01:01:27,130 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,130 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:15 [2019-11-20 01:01:27,154 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 11 treesize of output 7 [2019-11-20 01:01:27,154 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,172 INFO L567 ElimStorePlain]: treesize reduction 5, result has 83.9 percent of original size [2019-11-20 01:01:27,173 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 01:01:27,173 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:25 [2019-11-20 01:01:27,224 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2019-11-20 01:01:27,224 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,231 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:27,231 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,231 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:27 [2019-11-20 01:01:27,256 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2019-11-20 01:01:27,256 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,264 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:27,265 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 01:01:27,265 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:17 [2019-11-20 01:01:27,326 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 21 [2019-11-20 01:01:27,326 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:27,339 INFO L567 ElimStorePlain]: treesize reduction 4, result has 73.3 percent of original size [2019-11-20 01:01:27,339 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 01:01:27,339 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:11 [2019-11-20 01:01:27,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 01:01:27,367 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:01:27,778 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 01:01:27,778 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1133804631] [2019-11-20 01:01:27,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-20 01:01:27,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 23 [2019-11-20 01:01:27,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528613299] [2019-11-20 01:01:27,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-20 01:01:27,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 01:01:27,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-20 01:01:27,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2019-11-20 01:01:27,780 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 15 states. [2019-11-20 01:01:28,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 01:01:28,140 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-11-20 01:01:28,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-20 01:01:28,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-11-20 01:01:28,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 01:01:28,141 INFO L225 Difference]: With dead ends: 28 [2019-11-20 01:01:28,141 INFO L226 Difference]: Without dead ends: 28 [2019-11-20 01:01:28,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2019-11-20 01:01:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-20 01:01:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-20 01:01:28,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-20 01:01:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-11-20 01:01:28,145 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 31 [2019-11-20 01:01:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 01:01:28,145 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-11-20 01:01:28,145 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-20 01:01:28,146 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-11-20 01:01:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-20 01:01:28,146 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 01:01:28,147 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 01:01:28,349 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:28,349 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr14ENSURES_VIOLATIONMEMORY_LEAK, mainErr5REQUIRES_VIOLATION, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr4REQUIRES_VIOLATION, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr0REQUIRES_VIOLATION, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2019-11-20 01:01:28,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 01:01:28,349 INFO L82 PathProgramCache]: Analyzing trace with hash 1231704548, now seen corresponding path program 1 times [2019-11-20 01:01:28,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 01:01:28,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1342251625] [2019-11-20 01:01:28,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_e2760b9c-43b8-4943-a5f2-b9b13d6412ed/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 01:01:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 01:01:28,554 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 01:01:28,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 01:01:28,561 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 01:01:28,561 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,563 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:28,563 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,564 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-20 01:01:28,727 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 11 treesize of output 7 [2019-11-20 01:01:28,727 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,743 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:28,743 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 01:01:28,743 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:44 [2019-11-20 01:01:28,830 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 29 [2019-11-20 01:01:28,831 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,842 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:28,843 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,843 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:59, output treesize:44 [2019-11-20 01:01:28,848 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 25 [2019-11-20 01:01:28,848 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 01:01:28,859 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 01:01:28,859 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 01:01:28,859 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:32 [2019-11-20 01:01:29,044 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:01:31,151 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-20 01:01:31,152 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 01:01:31,524 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:01:37,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 01:01:38,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 01:01:38,068 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Alternating quantifiers not yet supported at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimOneRec(ElimStorePlain.java:253) 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 01:01:38,071 INFO L168 Benchmark]: Toolchain (without parser) took 90451.33 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 178.8 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -135.5 MB). Peak memory consumption was 43.2 MB. Max. memory is 11.5 GB. [2019-11-20 01:01:38,071 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 01:01:38,072 INFO L168 Benchmark]: CACSL2BoogieTranslator took 484.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. [2019-11-20 01:01:38,072 INFO L168 Benchmark]: Boogie Preprocessor took 52.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-20 01:01:38,073 INFO L168 Benchmark]: RCFGBuilder took 631.63 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. [2019-11-20 01:01:38,073 INFO L168 Benchmark]: TraceAbstraction took 89279.65 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. [2019-11-20 01:01:38,075 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 1.0 GB. Free memory is still 967.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 484.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -178.5 MB). Peak memory consumption was 18.1 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 52.27 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 631.63 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: 45.2 MB). Peak memory consumption was 45.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 89279.65 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 34.1 MB). Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: -7.6 MB). Peak memory consumption was 26.5 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Alternating quantifiers not yet supported de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Alternating quantifiers not yet supported: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:271) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...