./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6b5699aa 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_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i -s /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.1.24-6b5699a [2019-11-25 08:49:36,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-25 08:49:36,733 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-25 08:49:36,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-25 08:49:36,749 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-25 08:49:36,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-25 08:49:36,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-25 08:49:36,761 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-25 08:49:36,766 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-25 08:49:36,769 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-25 08:49:36,770 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-25 08:49:36,771 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-25 08:49:36,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-25 08:49:36,772 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-25 08:49:36,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-25 08:49:36,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-25 08:49:36,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-25 08:49:36,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-25 08:49:36,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-25 08:49:36,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-25 08:49:36,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-25 08:49:36,783 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-25 08:49:36,785 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-25 08:49:36,786 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-25 08:49:36,791 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-25 08:49:36,791 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-25 08:49:36,791 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-25 08:49:36,792 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-25 08:49:36,792 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-25 08:49:36,793 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-25 08:49:36,793 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-25 08:49:36,793 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-25 08:49:36,794 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-25 08:49:36,794 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-25 08:49:36,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-25 08:49:36,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-25 08:49:36,795 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-25 08:49:36,795 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-25 08:49:36,795 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-25 08:49:36,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-25 08:49:36,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-25 08:49:36,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2019-11-25 08:49:36,810 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-25 08:49:36,810 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-25 08:49:36,811 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-25 08:49:36,811 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-25 08:49:36,811 INFO L138 SettingsManager]: * Use SBE=true [2019-11-25 08:49:36,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-25 08:49:36,812 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-25 08:49:36,812 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2019-11-25 08:49:36,812 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-25 08:49:36,812 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-25 08:49:36,813 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-25 08:49:36,814 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-25 08:49:36,814 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-25 08:49:36,814 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-25 08:49:36,814 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-25 08:49:36,814 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-25 08:49:36,815 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-25 08:49:36,815 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-25 08:49:36,815 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-25 08:49:36,815 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-25 08:49:36,816 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-25 08:49:36,816 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-25 08:49:36,816 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-25 08:49:36,824 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-25 08:49:36,825 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-25 08:49:36,825 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_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 -> 13cb8f020c937b6a3b0b6c39b85904cffb8b3ba5 [2019-11-25 08:49:36,964 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-25 08:49:36,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-25 08:49:36,979 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-25 08:49:36,980 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-25 08:49:36,980 INFO L275 PluginConnector]: CDTParser initialized [2019-11-25 08:49:36,981 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/../../sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-11-25 08:49:37,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/data/0b600b073/ba59a131fd89491f9be53b96bd71dd85/FLAG229ac85d8 [2019-11-25 08:49:37,448 INFO L306 CDTParser]: Found 1 translation units. [2019-11-25 08:49:37,448 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/sv-benchmarks/c/list-simple/sll2n_remove_all_reverse.i [2019-11-25 08:49:37,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/data/0b600b073/ba59a131fd89491f9be53b96bd71dd85/FLAG229ac85d8 [2019-11-25 08:49:37,827 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/data/0b600b073/ba59a131fd89491f9be53b96bd71dd85 [2019-11-25 08:49:37,830 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-25 08:49:37,831 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-25 08:49:37,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:37,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-25 08:49:37,835 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-25 08:49:37,836 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:37" (1/1) ... [2019-11-25 08:49:37,838 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64e67cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:37, skipping insertion in model container [2019-11-25 08:49:37,838 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:49:37" (1/1) ... [2019-11-25 08:49:37,845 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-25 08:49:37,901 INFO L179 MainTranslator]: Built tables and reachable declarations [2019-11-25 08:49:38,349 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:38,360 INFO L201 MainTranslator]: Completed pre-run [2019-11-25 08:49:38,401 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-25 08:49:38,468 INFO L205 MainTranslator]: Completed translation [2019-11-25 08:49:38,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38 WrapperNode [2019-11-25 08:49:38,468 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-25 08:49:38,469 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-25 08:49:38,469 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-25 08:49:38,469 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-25 08:49:38,483 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,483 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,557 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,571 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... [2019-11-25 08:49:38,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-25 08:49:38,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-25 08:49:38,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-25 08:49:38,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-25 08:49:38,588 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:38,663 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-25 08:49:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-25 08:49:38,664 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:49:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2019-11-25 08:49:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2019-11-25 08:49:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2019-11-25 08:49:38,665 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2019-11-25 08:49:38,666 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2019-11-25 08:49:38,667 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_last [2019-11-25 08:49:38,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-25 08:49:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-25 08:49:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2019-11-25 08:49:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2019-11-25 08:49:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2019-11-25 08:49:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2019-11-25 08:49:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2019-11-25 08:49:38,669 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2019-11-25 08:49:38,670 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2019-11-25 08:49:38,670 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2019-11-25 08:49:38,671 INFO L130 BoogieDeclarations]: Found specification of procedure select [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure random [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2019-11-25 08:49:38,672 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2019-11-25 08:49:38,673 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2019-11-25 08:49:38,673 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2019-11-25 08:49:38,673 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2019-11-25 08:49:38,674 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2019-11-25 08:49:38,675 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2019-11-25 08:49:38,675 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2019-11-25 08:49:38,675 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2019-11-25 08:49:38,675 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2019-11-25 08:49:38,676 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2019-11-25 08:49:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2019-11-25 08:49:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2019-11-25 08:49:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2019-11-25 08:49:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2019-11-25 08:49:38,677 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2019-11-25 08:49:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2019-11-25 08:49:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2019-11-25 08:49:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2019-11-25 08:49:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2019-11-25 08:49:38,678 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2019-11-25 08:49:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2019-11-25 08:49:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2019-11-25 08:49:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-11-25 08:49:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-11-25 08:49:38,679 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2019-11-25 08:49:38,680 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-11-25 08:49:38,680 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2019-11-25 08:49:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2019-11-25 08:49:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2019-11-25 08:49:38,681 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2019-11-25 08:49:38,682 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2019-11-25 08:49:38,682 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2019-11-25 08:49:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2019-11-25 08:49:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2019-11-25 08:49:38,683 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2019-11-25 08:49:38,684 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2019-11-25 08:49:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2019-11-25 08:49:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2019-11-25 08:49:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2019-11-25 08:49:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2019-11-25 08:49:38,685 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure system [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2019-11-25 08:49:38,686 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2019-11-25 08:49:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2019-11-25 08:49:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2019-11-25 08:49:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure div [2019-11-25 08:49:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2019-11-25 08:49:38,687 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2019-11-25 08:49:38,688 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2019-11-25 08:49:38,689 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2019-11-25 08:49:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2019-11-25 08:49:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2019-11-25 08:49:38,690 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2019-11-25 08:49:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2019-11-25 08:49:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2019-11-25 08:49:38,691 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_last [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-11-25 08:49:38,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-25 08:49:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-25 08:49:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-25 08:49:38,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-11-25 08:49:38,694 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-25 08:49:38,695 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-25 08:49:38,698 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2019-11-25 08:49:38,698 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-25 08:49:39,036 INFO L688 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2019-11-25 08:49:39,436 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-25 08:49:39,437 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-25 08:49:39,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:39 BoogieIcfgContainer [2019-11-25 08:49:39,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-25 08:49:39,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-25 08:49:39,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-25 08:49:39,442 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-25 08:49:39,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:49:37" (1/3) ... [2019-11-25 08:49:39,443 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec01805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:39, skipping insertion in model container [2019-11-25 08:49:39,443 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:49:38" (2/3) ... [2019-11-25 08:49:39,444 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec01805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:49:39, skipping insertion in model container [2019-11-25 08:49:39,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:49:39" (3/3) ... [2019-11-25 08:49:39,446 INFO L109 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all_reverse.i [2019-11-25 08:49:39,455 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-25 08:49:39,462 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 31 error locations. [2019-11-25 08:49:39,473 INFO L249 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2019-11-25 08:49:39,493 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-25 08:49:39,493 INFO L374 AbstractCegarLoop]: Hoare is false [2019-11-25 08:49:39,493 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-25 08:49:39,494 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-25 08:49:39,494 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-25 08:49:39,494 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-25 08:49:39,494 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-25 08:49:39,494 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-25 08:49:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states. [2019-11-25 08:49:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:49:39,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:39,523 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:39,523 INFO L410 AbstractCegarLoop]: === Iteration 1 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:39,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:39,529 INFO L82 PathProgramCache]: Analyzing trace with hash -922503962, now seen corresponding path program 1 times [2019-11-25 08:49:39,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:39,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [446034116] [2019-11-25 08:49:39,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:39,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:39,804 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:49:39,809 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:39,869 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 [2019-11-25 08:49:39,870 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:39,880 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:49:39,881 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:49:39,881 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:49:39,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:39,891 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:39,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:39,905 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [446034116] [2019-11-25 08:49:39,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:39,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2019-11-25 08:49:39,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340690874] [2019-11-25 08:49:39,911 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-25 08:49:39,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:39,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-25 08:49:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:49:39,933 INFO L87 Difference]: Start difference. First operand 90 states. Second operand 3 states. [2019-11-25 08:49:40,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:40,126 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2019-11-25 08:49:40,127 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:49:40,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-25 08:49:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:40,140 INFO L225 Difference]: With dead ends: 88 [2019-11-25 08:49:40,140 INFO L226 Difference]: Without dead ends: 81 [2019-11-25 08:49:40,142 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-25 08:49:40,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-11-25 08:49:40,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2019-11-25 08:49:40,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-25 08:49:40,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2019-11-25 08:49:40,198 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 13 [2019-11-25 08:49:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:40,198 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2019-11-25 08:49:40,199 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-25 08:49:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2019-11-25 08:49:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-25 08:49:40,200 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:40,200 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:40,403 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:40,403 INFO L410 AbstractCegarLoop]: === Iteration 2 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:40,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:40,404 INFO L82 PathProgramCache]: Analyzing trace with hash -922503961, now seen corresponding path program 1 times [2019-11-25 08:49:40,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:40,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1435087868] [2019-11-25 08:49:40,405 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:40,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:40,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:49:40,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:40,611 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 [2019-11-25 08:49:40,611 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:40,616 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:49:40,617 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:49:40,617 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:49:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:40,627 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:40,672 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1435087868] [2019-11-25 08:49:40,672 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:40,672 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2019-11-25 08:49:40,672 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595536515] [2019-11-25 08:49:40,674 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-25 08:49:40,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:40,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-25 08:49:40,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:40,675 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 4 states. [2019-11-25 08:49:40,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:40,968 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2019-11-25 08:49:40,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-25 08:49:40,969 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-25 08:49:40,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:40,970 INFO L225 Difference]: With dead ends: 79 [2019-11-25 08:49:40,971 INFO L226 Difference]: Without dead ends: 79 [2019-11-25 08:49:40,971 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-25 08:49:40,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-25 08:49:40,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-25 08:49:40,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-25 08:49:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-25 08:49:40,980 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 13 [2019-11-25 08:49:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:40,981 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-25 08:49:40,981 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-25 08:49:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-25 08:49:40,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-25 08:49:40,982 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:40,982 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:41,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:41,192 INFO L410 AbstractCegarLoop]: === Iteration 3 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:41,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:41,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1876353915, now seen corresponding path program 1 times [2019-11-25 08:49:41,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:41,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [717393017] [2019-11-25 08:49:41,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:41,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:41,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-25 08:49:41,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:41,407 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:41,496 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [717393017] [2019-11-25 08:49:41,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:41,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 7 [2019-11-25 08:49:41,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364209722] [2019-11-25 08:49:41,497 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-25 08:49:41,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:41,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-25 08:49:41,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:49:41,498 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 7 states. [2019-11-25 08:49:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:41,567 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2019-11-25 08:49:41,567 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:41,568 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 15 [2019-11-25 08:49:41,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:41,570 INFO L225 Difference]: With dead ends: 90 [2019-11-25 08:49:41,570 INFO L226 Difference]: Without dead ends: 87 [2019-11-25 08:49:41,570 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:49:41,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-25 08:49:41,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 80. [2019-11-25 08:49:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-25 08:49:41,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2019-11-25 08:49:41,583 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 15 [2019-11-25 08:49:41,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:41,583 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2019-11-25 08:49:41,583 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-25 08:49:41,583 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2019-11-25 08:49:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:49:41,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:41,584 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:41,787 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:41,787 INFO L410 AbstractCegarLoop]: === Iteration 4 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:41,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1541440809, now seen corresponding path program 1 times [2019-11-25 08:49:41,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:41,789 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [412715654] [2019-11-25 08:49:41,789 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:42,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:42,043 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-25 08:49:42,045 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:42,055 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 [2019-11-25 08:49:42,055 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:42,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:49:42,062 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:49:42,062 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:49:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:42,095 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:42,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [412715654] [2019-11-25 08:49:42,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:42,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2019-11-25 08:49:42,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555995018] [2019-11-25 08:49:42,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:49:42,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:42,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:49:42,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:49:42,169 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand 6 states. [2019-11-25 08:49:42,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:42,503 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2019-11-25 08:49:42,504 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:42,504 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-11-25 08:49:42,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:42,506 INFO L225 Difference]: With dead ends: 80 [2019-11-25 08:49:42,506 INFO L226 Difference]: Without dead ends: 80 [2019-11-25 08:49:42,506 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-25 08:49:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-25 08:49:42,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-25 08:49:42,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-25 08:49:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2019-11-25 08:49:42,513 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 19 [2019-11-25 08:49:42,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:42,514 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2019-11-25 08:49:42,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:49:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2019-11-25 08:49:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-25 08:49:42,515 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:42,515 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:42,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:42,718 INFO L410 AbstractCegarLoop]: === Iteration 5 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:42,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:42,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1541440810, now seen corresponding path program 1 times [2019-11-25 08:49:42,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:42,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1421245248] [2019-11-25 08:49:42,719 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:42,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:42,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-25 08:49:42,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:42,929 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 [2019-11-25 08:49:42,930 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:42,940 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:49:42,940 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:49:42,941 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2019-11-25 08:49:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:42,995 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:43,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1421245248] [2019-11-25 08:49:43,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:43,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2019-11-25 08:49:43,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720149794] [2019-11-25 08:49:43,376 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-25 08:49:43,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:43,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-25 08:49:43,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-25 08:49:43,377 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 10 states. [2019-11-25 08:49:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:43,993 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2019-11-25 08:49:43,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-25 08:49:43,994 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 19 [2019-11-25 08:49:43,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:43,995 INFO L225 Difference]: With dead ends: 79 [2019-11-25 08:49:43,995 INFO L226 Difference]: Without dead ends: 79 [2019-11-25 08:49:43,995 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:49:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-25 08:49:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2019-11-25 08:49:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-25 08:49:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2019-11-25 08:49:44,002 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 19 [2019-11-25 08:49:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:44,002 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2019-11-25 08:49:44,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-25 08:49:44,003 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2019-11-25 08:49:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-25 08:49:44,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:44,004 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:44,216 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:44,216 INFO L410 AbstractCegarLoop]: === Iteration 6 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:44,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:44,217 INFO L82 PathProgramCache]: Analyzing trace with hash 261524774, now seen corresponding path program 1 times [2019-11-25 08:49:44,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:44,217 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [390588095] [2019-11-25 08:49:44,217 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:44,423 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-25 08:49:44,426 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:44,471 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:44,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-25 08:49:44,679 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [390588095] [2019-11-25 08:49:44,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-25 08:49:44,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2019-11-25 08:49:44,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093817534] [2019-11-25 08:49:44,680 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-25 08:49:44,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:44,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-25 08:49:44,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-11-25 08:49:44,681 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand 9 states. [2019-11-25 08:49:44,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:44,889 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2019-11-25 08:49:44,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-25 08:49:44,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2019-11-25 08:49:44,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:44,891 INFO L225 Difference]: With dead ends: 92 [2019-11-25 08:49:44,891 INFO L226 Difference]: Without dead ends: 89 [2019-11-25 08:49:44,892 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2019-11-25 08:49:44,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-25 08:49:44,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 84. [2019-11-25 08:49:44,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-25 08:49:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2019-11-25 08:49:44,898 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 28 [2019-11-25 08:49:44,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:44,898 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2019-11-25 08:49:44,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-25 08:49:44,898 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2019-11-25 08:49:44,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-25 08:49:44,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:44,904 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:45,104 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:45,105 INFO L410 AbstractCegarLoop]: === Iteration 7 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:45,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:45,105 INFO L82 PathProgramCache]: Analyzing trace with hash -2022231717, now seen corresponding path program 2 times [2019-11-25 08:49:45,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:45,106 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1143157204] [2019-11-25 08:49:45,106 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/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 [2019-11-25 08:49:45,258 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-25 08:49:45,258 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-25 08:49:45,259 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-25 08:49:45,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:45,279 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:49:45,279 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:49:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-25 08:49:45,326 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1143157204] [2019-11-25 08:49:45,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-25 08:49:45,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-11-25 08:49:45,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592917022] [2019-11-25 08:49:45,327 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-25 08:49:45,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-25 08:49:45,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-25 08:49:45,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-11-25 08:49:45,327 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand 6 states. [2019-11-25 08:49:45,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-25 08:49:45,385 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2019-11-25 08:49:45,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-25 08:49:45,385 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2019-11-25 08:49:45,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-25 08:49:45,387 INFO L225 Difference]: With dead ends: 88 [2019-11-25 08:49:45,387 INFO L226 Difference]: Without dead ends: 88 [2019-11-25 08:49:45,387 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-25 08:49:45,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-25 08:49:45,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2019-11-25 08:49:45,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-25 08:49:45,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 93 transitions. [2019-11-25 08:49:45,394 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 93 transitions. Word has length 41 [2019-11-25 08:49:45,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-25 08:49:45,394 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 93 transitions. [2019-11-25 08:49:45,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-25 08:49:45,394 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 93 transitions. [2019-11-25 08:49:45,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-25 08:49:45,396 INFO L402 BasicCegarLoop]: Found error trace [2019-11-25 08:49:45,396 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-25 08:49:45,596 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:45,597 INFO L410 AbstractCegarLoop]: === Iteration 8 === [sll_remove_lastErr5REQUIRES_VIOLATION, sll_remove_lastErr7ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr16REQUIRES_VIOLATION, sll_remove_lastErr17REQUIRES_VIOLATION, sll_remove_lastErr21ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr8ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr18REQUIRES_VIOLATION, sll_remove_lastErr20ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr6ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr9REQUIRES_VIOLATION, sll_remove_lastErr10REQUIRES_VIOLATION, sll_remove_lastErr0REQUIRES_VIOLATION, sll_remove_lastErr11REQUIRES_VIOLATION, sll_remove_lastErr1REQUIRES_VIOLATION, sll_remove_lastErr12REQUIRES_VIOLATION, sll_remove_lastErr19ASSERT_VIOLATIONMEMORY_FREE, sll_remove_lastErr2REQUIRES_VIOLATION, sll_remove_lastErr13REQUIRES_VIOLATION, sll_remove_lastErr3REQUIRES_VIOLATION, sll_remove_lastErr14REQUIRES_VIOLATION, sll_remove_lastErr4REQUIRES_VIOLATION, sll_remove_lastErr15REQUIRES_VIOLATION, sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, mainErr2ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr2REQUIRES_VIOLATION, node_createErr3REQUIRES_VIOLATION]=== [2019-11-25 08:49:45,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-25 08:49:45,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2039323638, now seen corresponding path program 1 times [2019-11-25 08:49:45,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-25 08:49:45,598 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1424343890] [2019-11-25 08:49:45,598 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_7db0af0c-b6c3-4eb4-aa42-0087b514607d/bin/uautomizer/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:49:45,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-25 08:49:45,881 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-25 08:49:45,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-25 08:49:45,890 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 [2019-11-25 08:49:45,890 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:45,908 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-25 08:49:45,909 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-25 08:49:45,909 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2019-11-25 08:49:46,190 INFO L343 Elim1Store]: treesize reduction 27, result has 57.1 percent of original size [2019-11-25 08:49:46,191 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 4 case distinctions, treesize of input 22 treesize of output 49 [2019-11-25 08:49:46,192 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-25 08:49:46,216 INFO L567 ElimStorePlain]: treesize reduction 17, result has 54.1 percent of original size [2019-11-25 08:49:46,217 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2019-11-25 08:49:46,217 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:20 [2019-11-25 08:49:46,333 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-25 08:49:46,334 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-25 08:50:06,498 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-25 08:50:06,499 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$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-25 08:50:06,502 INFO L168 Benchmark]: Toolchain (without parser) took 28671.86 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 169.9 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -129.7 MB). Peak memory consumption was 40.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:50:06,503 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-25 08:50:06,504 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -170.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. [2019-11-25 08:50:06,504 INFO L168 Benchmark]: Boogie Preprocessor took 108.90 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-11-25 08:50:06,505 INFO L168 Benchmark]: RCFGBuilder took 860.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. [2019-11-25 08:50:06,505 INFO L168 Benchmark]: TraceAbstraction took 27061.68 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -24.3 MB). Peak memory consumption was 16.6 MB. Max. memory is 11.5 GB. [2019-11-25 08:50:06,508 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 637.37 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 129.0 MB). Free memory was 940.7 MB in the beginning and 1.1 GB in the end (delta: -170.8 MB). Peak memory consumption was 18.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 108.90 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 860.33 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 60.0 MB). Peak memory consumption was 60.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 27061.68 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 40.9 MB). Free memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: -24.3 MB). Peak memory consumption was 16.6 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...