./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa --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 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:10:05,874 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:10:05,876 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:10:05,898 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:10:05,898 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:10:05,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:10:05,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:10:05,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:10:05,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:10:05,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:10:05,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:10:05,906 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:10:05,907 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:10:05,907 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:10:05,909 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:10:05,910 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:10:05,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:10:05,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:10:05,913 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:10:05,915 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:10:05,916 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:10:05,918 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:10:05,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:10:05,919 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:10:05,922 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:10:05,922 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:10:05,923 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:10:05,924 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:10:05,924 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:10:05,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:10:05,925 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:10:05,926 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:10:05,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:10:05,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:10:05,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:10:05,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:10:05,928 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:10:05,928 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:10:05,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:10:05,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:10:05,929 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:10:05,930 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-06 21:10:05,947 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:10:05,947 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:10:05,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:10:05,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:10:05,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:10:05,948 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:10:05,949 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:10:05,949 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:10:05,949 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:10:05,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:10:05,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:10:05,949 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 21:10:05,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:10:05,950 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:10:05,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:05,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 21:10:05,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:10:05,952 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-12-06 21:10:06,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:10:06,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:10:06,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:10:06,187 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:10:06,188 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:10:06,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-06 21:10:06,236 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/c3019adac/f4569a6884254d2faf1ddcdaf0990869/FLAGa5ebc3012 [2021-12-06 21:10:06,659 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:10:06,660 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-06 21:10:06,674 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/c3019adac/f4569a6884254d2faf1ddcdaf0990869/FLAGa5ebc3012 [2021-12-06 21:10:06,684 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/c3019adac/f4569a6884254d2faf1ddcdaf0990869 [2021-12-06 21:10:06,685 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:10:06,686 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:10:06,688 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:06,688 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:10:06,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:10:06,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:06" (1/1) ... [2021-12-06 21:10:06,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ba1b61c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:06, skipping insertion in model container [2021-12-06 21:10:06,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:06" (1/1) ... [2021-12-06 21:10:06,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:10:06,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:10:06,930 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-06 21:10:06,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:06,954 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:10:06,977 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-06 21:10:06,988 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:07,011 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:10:07,011 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07 WrapperNode [2021-12-06 21:10:07,011 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:07,012 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:07,012 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:10:07,012 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:10:07,019 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,035 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,062 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 203 [2021-12-06 21:10:07,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:07,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:10:07,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:10:07,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:10:07,072 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,077 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,089 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,097 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:10:07,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:10:07,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:10:07,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:10:07,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (1/1) ... [2021-12-06 21:10:07,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:07,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:07,133 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:10:07,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-06 21:10:07,162 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:10:07,162 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-06 21:10:07,162 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-06 21:10:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-06 21:10:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-06 21:10:07,163 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:10:07,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:10:07,246 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:10:07,247 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:10:07,614 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:10:07,621 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:10:07,621 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-06 21:10:07,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:07 BoogieIcfgContainer [2021-12-06 21:10:07,623 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:10:07,624 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:10:07,624 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:10:07,626 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:10:07,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:10:06" (1/3) ... [2021-12-06 21:10:07,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c3b576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:07, skipping insertion in model container [2021-12-06 21:10:07,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:07" (2/3) ... [2021-12-06 21:10:07,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74c3b576 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:07, skipping insertion in model container [2021-12-06 21:10:07,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:07" (3/3) ... [2021-12-06 21:10:07,629 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-12-06 21:10:07,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:10:07,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-12-06 21:10:07,662 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:10:07,667 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:10:07,668 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-12-06 21:10:07,686 INFO L276 IsEmpty]: Start isEmpty. Operand has 223 states, 121 states have (on average 2.090909090909091) internal successors, (253), 209 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 21:10:07,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-06 21:10:07,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:07,691 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-06 21:10:07,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:07,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:07,695 INFO L85 PathProgramCache]: Analyzing trace with hash 6220774, now seen corresponding path program 1 times [2021-12-06 21:10:07,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:07,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557230389] [2021-12-06 21:10:07,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:07,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:07,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557230389] [2021-12-06 21:10:07,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557230389] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:07,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:07,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:07,817 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053666564] [2021-12-06 21:10:07,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:07,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:10:07,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:07,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:10:07,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:10:07,843 INFO L87 Difference]: Start difference. First operand has 223 states, 121 states have (on average 2.090909090909091) internal successors, (253), 209 states have internal predecessors, (253), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:07,867 INFO L93 Difference]: Finished difference Result 221 states and 242 transitions. [2021-12-06 21:10:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:10:07,868 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-06 21:10:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:07,875 INFO L225 Difference]: With dead ends: 221 [2021-12-06 21:10:07,876 INFO L226 Difference]: Without dead ends: 219 [2021-12-06 21:10:07,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:10:07,880 INFO L933 BasicCegarLoop]: 242 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:07,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:07,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-06 21:10:07,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2021-12-06 21:10:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 116 states have (on average 1.8448275862068966) internal successors, (214), 205 states have internal predecessors, (214), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:07,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 240 transitions. [2021-12-06 21:10:07,919 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 240 transitions. Word has length 4 [2021-12-06 21:10:07,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:07,920 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 240 transitions. [2021-12-06 21:10:07,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:07,920 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 240 transitions. [2021-12-06 21:10:07,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:10:07,920 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:07,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:10:07,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 21:10:07,921 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:07,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1692154958, now seen corresponding path program 1 times [2021-12-06 21:10:07,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:07,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221417758] [2021-12-06 21:10:07,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:07,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:07,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:07,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:07,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221417758] [2021-12-06 21:10:07,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221417758] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:07,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:07,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:07,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522973108] [2021-12-06 21:10:07,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:07,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:07,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:07,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:07,972 INFO L87 Difference]: Start difference. First operand 219 states and 240 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,083 INFO L93 Difference]: Finished difference Result 217 states and 238 transitions. [2021-12-06 21:10:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:08,083 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:10:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,085 INFO L225 Difference]: With dead ends: 217 [2021-12-06 21:10:08,085 INFO L226 Difference]: Without dead ends: 217 [2021-12-06 21:10:08,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:08,086 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 17 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 367 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-12-06 21:10:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2021-12-06 21:10:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 116 states have (on average 1.8275862068965518) internal successors, (212), 203 states have internal predecessors, (212), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:08,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 238 transitions. [2021-12-06 21:10:08,099 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 238 transitions. Word has length 6 [2021-12-06 21:10:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,099 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 238 transitions. [2021-12-06 21:10:08,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,100 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 238 transitions. [2021-12-06 21:10:08,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:10:08,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 21:10:08,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:08,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1692154959, now seen corresponding path program 1 times [2021-12-06 21:10:08,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6832344] [2021-12-06 21:10:08,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6832344] [2021-12-06 21:10:08,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6832344] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:08,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563813161] [2021-12-06 21:10:08,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:08,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:08,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:08,147 INFO L87 Difference]: Start difference. First operand 217 states and 238 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,240 INFO L93 Difference]: Finished difference Result 215 states and 236 transitions. [2021-12-06 21:10:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:08,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:10:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,243 INFO L225 Difference]: With dead ends: 215 [2021-12-06 21:10:08,243 INFO L226 Difference]: Without dead ends: 215 [2021-12-06 21:10:08,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:08,244 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 15 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 372 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-12-06 21:10:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2021-12-06 21:10:08,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 116 states have (on average 1.8103448275862069) internal successors, (210), 201 states have internal predecessors, (210), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 236 transitions. [2021-12-06 21:10:08,260 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 236 transitions. Word has length 6 [2021-12-06 21:10:08,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,260 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 236 transitions. [2021-12-06 21:10:08,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,266 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 236 transitions. [2021-12-06 21:10:08,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:10:08,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,267 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 21:10:08,267 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:08,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash -387700622, now seen corresponding path program 1 times [2021-12-06 21:10:08,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208378448] [2021-12-06 21:10:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208378448] [2021-12-06 21:10:08,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208378448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:08,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983458219] [2021-12-06 21:10:08,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:08,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:08,343 INFO L87 Difference]: Start difference. First operand 215 states and 236 transitions. Second operand has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,475 INFO L93 Difference]: Finished difference Result 210 states and 231 transitions. [2021-12-06 21:10:08,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:08,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:10:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,477 INFO L225 Difference]: With dead ends: 210 [2021-12-06 21:10:08,477 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 21:10:08,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:08,478 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 60 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 606 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 21:10:08,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-12-06 21:10:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 116 states have (on average 1.7672413793103448) internal successors, (205), 196 states have internal predecessors, (205), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:08,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 231 transitions. [2021-12-06 21:10:08,488 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 231 transitions. Word has length 10 [2021-12-06 21:10:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,488 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 231 transitions. [2021-12-06 21:10:08,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,488 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 231 transitions. [2021-12-06 21:10:08,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:10:08,489 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 21:10:08,489 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:08,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash -387700621, now seen corresponding path program 1 times [2021-12-06 21:10:08,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367434320] [2021-12-06 21:10:08,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367434320] [2021-12-06 21:10:08,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367434320] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:08,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901986469] [2021-12-06 21:10:08,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:08,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:08,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:08,561 INFO L87 Difference]: Start difference. First operand 210 states and 231 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,722 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2021-12-06 21:10:08,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:08,723 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:10:08,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,724 INFO L225 Difference]: With dead ends: 205 [2021-12-06 21:10:08,724 INFO L226 Difference]: Without dead ends: 205 [2021-12-06 21:10:08,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:08,725 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 39 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 544 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-12-06 21:10:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2021-12-06 21:10:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 116 states have (on average 1.7241379310344827) internal successors, (200), 191 states have internal predecessors, (200), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2021-12-06 21:10:08,731 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 10 [2021-12-06 21:10:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,732 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2021-12-06 21:10:08,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,732 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2021-12-06 21:10:08,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:10:08,732 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,732 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-06 21:10:08,732 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:08,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,733 INFO L85 PathProgramCache]: Analyzing trace with hash 866182740, now seen corresponding path program 1 times [2021-12-06 21:10:08,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776598685] [2021-12-06 21:10:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776598685] [2021-12-06 21:10:08,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776598685] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,774 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:08,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495351215] [2021-12-06 21:10:08,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:08,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:08,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:08,776 INFO L87 Difference]: Start difference. First operand 205 states and 226 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:08,886 INFO L93 Difference]: Finished difference Result 204 states and 225 transitions. [2021-12-06 21:10:08,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:08,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:10:08,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:08,887 INFO L225 Difference]: With dead ends: 204 [2021-12-06 21:10:08,888 INFO L226 Difference]: Without dead ends: 204 [2021-12-06 21:10:08,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:08,889 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 21 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:08,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 630 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:08,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-12-06 21:10:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2021-12-06 21:10:08,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 116 states have (on average 1.7155172413793103) internal successors, (199), 190 states have internal predecessors, (199), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 225 transitions. [2021-12-06 21:10:08,897 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 225 transitions. Word has length 11 [2021-12-06 21:10:08,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:08,897 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 225 transitions. [2021-12-06 21:10:08,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:08,897 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 225 transitions. [2021-12-06 21:10:08,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:10:08,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:08,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:08,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-06 21:10:08,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:08,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:08,899 INFO L85 PathProgramCache]: Analyzing trace with hash 866182741, now seen corresponding path program 1 times [2021-12-06 21:10:08,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:08,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112508253] [2021-12-06 21:10:08,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:08,900 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:08,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:08,966 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:08,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112508253] [2021-12-06 21:10:08,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112508253] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:08,966 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:08,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:08,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648657565] [2021-12-06 21:10:08,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:08,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:08,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:08,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:08,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:08,968 INFO L87 Difference]: Start difference. First operand 204 states and 225 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:09,091 INFO L93 Difference]: Finished difference Result 203 states and 224 transitions. [2021-12-06 21:10:09,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:09,091 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:10:09,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:09,092 INFO L225 Difference]: With dead ends: 203 [2021-12-06 21:10:09,093 INFO L226 Difference]: Without dead ends: 203 [2021-12-06 21:10:09,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:09,094 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 20 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:09,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 858 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 21:10:09,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-12-06 21:10:09,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2021-12-06 21:10:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 116 states have (on average 1.706896551724138) internal successors, (198), 189 states have internal predecessors, (198), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:09,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 224 transitions. [2021-12-06 21:10:09,100 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 224 transitions. Word has length 11 [2021-12-06 21:10:09,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:09,101 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 224 transitions. [2021-12-06 21:10:09,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 224 transitions. [2021-12-06 21:10:09,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 21:10:09,101 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:09,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:09,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-06 21:10:09,102 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:09,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:09,102 INFO L85 PathProgramCache]: Analyzing trace with hash -610249734, now seen corresponding path program 1 times [2021-12-06 21:10:09,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:09,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165380020] [2021-12-06 21:10:09,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:09,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:09,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:09,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165380020] [2021-12-06 21:10:09,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165380020] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:09,264 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:09,264 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-06 21:10:09,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558182781] [2021-12-06 21:10:09,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:09,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-06 21:10:09,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:09,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-06 21:10:09,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-06 21:10:09,265 INFO L87 Difference]: Start difference. First operand 203 states and 224 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:09,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:09,719 INFO L93 Difference]: Finished difference Result 202 states and 223 transitions. [2021-12-06 21:10:09,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:09,720 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-06 21:10:09,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:09,722 INFO L225 Difference]: With dead ends: 202 [2021-12-06 21:10:09,722 INFO L226 Difference]: Without dead ends: 202 [2021-12-06 21:10:09,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:09,723 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 76 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:09,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 642 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:10:09,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-12-06 21:10:09,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2021-12-06 21:10:09,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 116 states have (on average 1.6982758620689655) internal successors, (197), 188 states have internal predecessors, (197), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:09,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 223 transitions. [2021-12-06 21:10:09,731 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 223 transitions. Word has length 19 [2021-12-06 21:10:09,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:09,732 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 223 transitions. [2021-12-06 21:10:09,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 8 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:09,732 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 223 transitions. [2021-12-06 21:10:09,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-06 21:10:09,733 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:09,733 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:09,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-06 21:10:09,733 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:09,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:09,733 INFO L85 PathProgramCache]: Analyzing trace with hash -610249733, now seen corresponding path program 1 times [2021-12-06 21:10:09,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:09,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325382833] [2021-12-06 21:10:09,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:09,734 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:09,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:09,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325382833] [2021-12-06 21:10:09,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325382833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:09,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:09,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:09,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903369343] [2021-12-06 21:10:09,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:09,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:09,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:09,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:09,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:09,876 INFO L87 Difference]: Start difference. First operand 202 states and 223 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:10,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:10,201 INFO L93 Difference]: Finished difference Result 210 states and 235 transitions. [2021-12-06 21:10:10,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:10,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-06 21:10:10,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:10,204 INFO L225 Difference]: With dead ends: 210 [2021-12-06 21:10:10,204 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 21:10:10,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:10,205 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 99 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 445 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:10,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 445 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:10:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 21:10:10,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2021-12-06 21:10:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 120 states have (on average 1.6833333333333333) internal successors, (202), 192 states have internal predecessors, (202), 18 states have call successors, (18), 4 states have call predecessors, (18), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:10:10,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 230 transitions. [2021-12-06 21:10:10,211 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 230 transitions. Word has length 19 [2021-12-06 21:10:10,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:10,211 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 230 transitions. [2021-12-06 21:10:10,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:10,211 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 230 transitions. [2021-12-06 21:10:10,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-06 21:10:10,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:10,212 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:10,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-06 21:10:10,212 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:10,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:10,213 INFO L85 PathProgramCache]: Analyzing trace with hash 450998278, now seen corresponding path program 1 times [2021-12-06 21:10:10,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 21:10:10,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274579741] [2021-12-06 21:10:10,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:10,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 21:10:10,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:10,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-06 21:10:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:10,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-12-06 21:10:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:10:10,355 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 21:10:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274579741] [2021-12-06 21:10:10,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274579741] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:10,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280664147] [2021-12-06 21:10:10,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:10,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 21:10:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:10,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 21:10:10,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 21:10:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:10:10,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:10,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:10,553 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-06 21:10:10,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2021-12-06 21:10:10,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2021-12-06 21:10:10,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:10,801 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 54101 column 46: unknown constant v_#length_BEFORE_CALL_2 [2021-12-06 21:10:10,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:10:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-12-06 21:10:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210003949] [2021-12-06 21:10:10,801 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:10,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 21:10:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:10,802 INFO L87 Difference]: Start difference. First operand 207 states and 230 transitions. Second operand has 7 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 21:10:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:10:10,803 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:10,804 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:10,804 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:10,826 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:11,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 21:10:11,006 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@f6a701f at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-06 21:10:11,009 INFO L158 Benchmark]: Toolchain (without parser) took 4322.45ms. Allocated memory was 77.6MB in the beginning and 132.1MB in the end (delta: 54.5MB). Free memory was 40.5MB in the beginning and 80.9MB in the end (delta: -40.3MB). Peak memory consumption was 13.9MB. Max. memory is 16.1GB. [2021-12-06 21:10:11,009 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 77.6MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:10:11,010 INFO L158 Benchmark]: CACSL2BoogieTranslator took 323.93ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 40.3MB in the beginning and 77.3MB in the end (delta: -37.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-06 21:10:11,010 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.82ms. Allocated memory is still 109.1MB. Free memory was 77.3MB in the beginning and 75.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:10:11,010 INFO L158 Benchmark]: Boogie Preprocessor took 41.32ms. Allocated memory is still 109.1MB. Free memory was 75.1MB in the beginning and 72.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-06 21:10:11,011 INFO L158 Benchmark]: RCFGBuilder took 517.19ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 45.3MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2021-12-06 21:10:11,011 INFO L158 Benchmark]: TraceAbstraction took 3384.72ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 44.7MB in the beginning and 80.9MB in the end (delta: -36.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-06 21:10:11,013 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 77.6MB. Free memory is still 58.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 323.93ms. Allocated memory was 77.6MB in the beginning and 109.1MB in the end (delta: 31.5MB). Free memory was 40.3MB in the beginning and 77.3MB in the end (delta: -37.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.82ms. Allocated memory is still 109.1MB. Free memory was 77.3MB in the beginning and 75.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.32ms. Allocated memory is still 109.1MB. Free memory was 75.1MB in the beginning and 72.6MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 517.19ms. Allocated memory is still 109.1MB. Free memory was 72.6MB in the beginning and 45.3MB in the end (delta: 27.3MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * TraceAbstraction took 3384.72ms. Allocated memory was 109.1MB in the beginning and 132.1MB in the end (delta: 23.1MB). Free memory was 44.7MB in the beginning and 80.9MB in the end (delta: -36.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@f6a701f de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@f6a701f: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-06 21:10:11,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa --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 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 21:10:12,586 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 21:10:12,588 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 21:10:12,616 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 21:10:12,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 21:10:12,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 21:10:12,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 21:10:12,622 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 21:10:12,624 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 21:10:12,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 21:10:12,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 21:10:12,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 21:10:12,628 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 21:10:12,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 21:10:12,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 21:10:12,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 21:10:12,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 21:10:12,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 21:10:12,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 21:10:12,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 21:10:12,642 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 21:10:12,643 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 21:10:12,644 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 21:10:12,645 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 21:10:12,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 21:10:12,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 21:10:12,650 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 21:10:12,651 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 21:10:12,652 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 21:10:12,653 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 21:10:12,653 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 21:10:12,653 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 21:10:12,654 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 21:10:12,655 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 21:10:12,656 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 21:10:12,656 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 21:10:12,661 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 21:10:12,661 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 21:10:12,662 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 21:10:12,663 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 21:10:12,663 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 21:10:12,664 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-06 21:10:12,687 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 21:10:12,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 21:10:12,688 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 21:10:12,688 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 21:10:12,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 21:10:12,688 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 21:10:12,689 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 21:10:12,689 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 21:10:12,689 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 21:10:12,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-06 21:10:12,690 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 21:10:12,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 21:10:12,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 21:10:12,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 21:10:12,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 21:10:12,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:12,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 21:10:12,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 21:10:12,692 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-06 21:10:12,693 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:12,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 21:10:12,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-06 21:10:12,693 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-12-06 21:10:12,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 21:10:12,940 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 21:10:12,942 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 21:10:12,943 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 21:10:12,944 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 21:10:12,944 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-06 21:10:12,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/47df18fd1/a59ca7f67aea4849878f50a4ce71065a/FLAG74076278d [2021-12-06 21:10:13,414 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 21:10:13,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-06 21:10:13,427 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/47df18fd1/a59ca7f67aea4849878f50a4ce71065a/FLAG74076278d [2021-12-06 21:10:13,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/data/47df18fd1/a59ca7f67aea4849878f50a4ce71065a [2021-12-06 21:10:13,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 21:10:13,439 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 21:10:13,440 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:13,440 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 21:10:13,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 21:10:13,443 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@549718b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13, skipping insertion in model container [2021-12-06 21:10:13,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 21:10:13,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 21:10:13,671 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-06 21:10:13,691 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:13,700 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 21:10:13,725 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-06 21:10:13,738 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 21:10:13,761 INFO L208 MainTranslator]: Completed translation [2021-12-06 21:10:13,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13 WrapperNode [2021-12-06 21:10:13,762 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 21:10:13,763 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:13,763 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 21:10:13,763 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 21:10:13,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,782 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,802 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 201 [2021-12-06 21:10:13,802 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 21:10:13,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 21:10:13,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 21:10:13,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 21:10:13,809 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,809 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,814 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,814 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,823 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,833 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,836 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 21:10:13,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 21:10:13,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 21:10:13,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 21:10:13,838 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (1/1) ... [2021-12-06 21:10:13,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 21:10:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 21:10:13,860 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 21:10:13,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 21:10:13,898 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-06 21:10:13,898 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-06 21:10:13,898 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-06 21:10:13,899 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-06 21:10:13,899 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 21:10:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-06 21:10:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-06 21:10:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-06 21:10:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-06 21:10:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-06 21:10:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-06 21:10:13,900 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 21:10:13,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 21:10:14,006 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 21:10:14,007 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 21:10:14,597 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 21:10:14,603 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 21:10:14,603 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-06 21:10:14,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:14 BoogieIcfgContainer [2021-12-06 21:10:14,605 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 21:10:14,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 21:10:14,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 21:10:14,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 21:10:14,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 09:10:13" (1/3) ... [2021-12-06 21:10:14,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d5f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:14, skipping insertion in model container [2021-12-06 21:10:14,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 09:10:13" (2/3) ... [2021-12-06 21:10:14,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f7d5f62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 09:10:14, skipping insertion in model container [2021-12-06 21:10:14,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 09:10:14" (3/3) ... [2021-12-06 21:10:14,610 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-12-06 21:10:14,614 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 21:10:14,614 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 83 error locations. [2021-12-06 21:10:14,646 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 21:10:14,651 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-06 21:10:14,652 INFO L340 AbstractCegarLoop]: Starting to check reachability of 83 error locations. [2021-12-06 21:10:14,666 INFO L276 IsEmpty]: Start isEmpty. Operand has 220 states, 118 states have (on average 2.1186440677966103) internal successors, (250), 206 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-06 21:10:14,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-12-06 21:10:14,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:14,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-12-06 21:10:14,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:14,681 INFO L85 PathProgramCache]: Analyzing trace with hash 6220742, now seen corresponding path program 1 times [2021-12-06 21:10:14,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:14,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92452655] [2021-12-06 21:10:14,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:14,690 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:14,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:14,691 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:14,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-06 21:10:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:14,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 21:10:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:14,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:14,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:14,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:14,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92452655] [2021-12-06 21:10:14,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92452655] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:14,782 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:14,782 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:14,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330135700] [2021-12-06 21:10:14,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:14,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 21:10:14,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:14,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 21:10:14,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:10:14,810 INFO L87 Difference]: Start difference. First operand has 220 states, 118 states have (on average 2.1186440677966103) internal successors, (250), 206 states have internal predecessors, (250), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:14,833 INFO L93 Difference]: Finished difference Result 218 states and 239 transitions. [2021-12-06 21:10:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 21:10:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-12-06 21:10:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:14,842 INFO L225 Difference]: With dead ends: 218 [2021-12-06 21:10:14,842 INFO L226 Difference]: Without dead ends: 216 [2021-12-06 21:10:14,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 21:10:14,846 INFO L933 BasicCegarLoop]: 239 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:14,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 21:10:14,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-06 21:10:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2021-12-06 21:10:14,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 113 states have (on average 1.8672566371681416) internal successors, (211), 202 states have internal predecessors, (211), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:14,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 237 transitions. [2021-12-06 21:10:14,886 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 237 transitions. Word has length 4 [2021-12-06 21:10:14,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:14,886 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 237 transitions. [2021-12-06 21:10:14,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:14,887 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 237 transitions. [2021-12-06 21:10:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:10:14,887 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:14,887 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:10:14,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:15,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:15,089 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting chain_nodeErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:15,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065585, now seen corresponding path program 1 times [2021-12-06 21:10:15,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:15,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [270407819] [2021-12-06 21:10:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:15,091 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:15,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:15,093 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:15,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-06 21:10:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:15,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 21:10:15,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:15,282 INFO L388 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 [2021-12-06 21:10:15,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:15,291 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:15,291 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:15,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [270407819] [2021-12-06 21:10:15,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [270407819] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:15,291 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:15,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:15,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886424790] [2021-12-06 21:10:15,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:15,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:15,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:15,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:15,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:15,293 INFO L87 Difference]: Start difference. First operand 216 states and 237 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:15,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:15,517 INFO L93 Difference]: Finished difference Result 214 states and 235 transitions. [2021-12-06 21:10:15,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:15,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:10:15,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:15,519 INFO L225 Difference]: With dead ends: 214 [2021-12-06 21:10:15,519 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 21:10:15,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:15,520 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 17 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:15,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 361 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:10:15,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 21:10:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-06 21:10:15,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 113 states have (on average 1.8495575221238938) internal successors, (209), 200 states have internal predecessors, (209), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 235 transitions. [2021-12-06 21:10:15,532 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 235 transitions. Word has length 6 [2021-12-06 21:10:15,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:15,532 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 235 transitions. [2021-12-06 21:10:15,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:15,533 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 235 transitions. [2021-12-06 21:10:15,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-06 21:10:15,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:15,533 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-06 21:10:15,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:15,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:15,735 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting chain_nodeErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:15,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:15,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1692065586, now seen corresponding path program 1 times [2021-12-06 21:10:15,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:15,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1980549899] [2021-12-06 21:10:15,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:15,740 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:15,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:15,743 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:15,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-06 21:10:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 21:10:15,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:15,921 INFO L388 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 [2021-12-06 21:10:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:15,936 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:15,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:15,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1980549899] [2021-12-06 21:10:15,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1980549899] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:15,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:15,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:15,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023535464] [2021-12-06 21:10:15,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:15,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:15,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:15,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:15,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:15,938 INFO L87 Difference]: Start difference. First operand 214 states and 235 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:16,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:16,232 INFO L93 Difference]: Finished difference Result 212 states and 233 transitions. [2021-12-06 21:10:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:16,234 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-06 21:10:16,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:16,235 INFO L225 Difference]: With dead ends: 212 [2021-12-06 21:10:16,235 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 21:10:16,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:16,236 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 15 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:16,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 366 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:10:16,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 21:10:16,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-06 21:10:16,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 113 states have (on average 1.831858407079646) internal successors, (207), 198 states have internal predecessors, (207), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-12-06 21:10:16,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 233 transitions. [2021-12-06 21:10:16,246 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 233 transitions. Word has length 6 [2021-12-06 21:10:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:16,247 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 233 transitions. [2021-12-06 21:10:16,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 233 transitions. [2021-12-06 21:10:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:10:16,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:16,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:16,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:16,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:16,450 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting chain_nodeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:16,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1321164331, now seen corresponding path program 1 times [2021-12-06 21:10:16,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815609828] [2021-12-06 21:10:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:16,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:16,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:16,455 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:16,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-06 21:10:16,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 21:10:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:16,576 INFO L354 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2021-12-06 21:10:16,577 INFO L388 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 2 case distinctions, treesize of input 12 treesize of output 33 [2021-12-06 21:10:16,626 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:10:16,626 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-12-06 21:10:16,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:16,684 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:16,684 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:16,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815609828] [2021-12-06 21:10:16,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815609828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:16,685 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:16,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:16,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257016148] [2021-12-06 21:10:16,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:16,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:16,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:16,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:16,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:16,686 INFO L87 Difference]: Start difference. First operand 212 states and 233 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:17,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:17,001 INFO L93 Difference]: Finished difference Result 222 states and 247 transitions. [2021-12-06 21:10:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:17,002 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:10:17,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:17,004 INFO L225 Difference]: With dead ends: 222 [2021-12-06 21:10:17,004 INFO L226 Difference]: Without dead ends: 222 [2021-12-06 21:10:17,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:17,005 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 9 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 659 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:17,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 659 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 172 Invalid, 0 Unknown, 89 Unchecked, 0.3s Time] [2021-12-06 21:10:17,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-12-06 21:10:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-12-06 21:10:17,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 120 states have (on average 1.7916666666666667) internal successors, (215), 207 states have internal predecessors, (215), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 247 transitions. [2021-12-06 21:10:17,019 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 247 transitions. Word has length 10 [2021-12-06 21:10:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:17,019 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 247 transitions. [2021-12-06 21:10:17,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:17,020 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 247 transitions. [2021-12-06 21:10:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-06 21:10:17,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:17,020 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:17,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-06 21:10:17,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:17,222 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting chain_nodeErr5REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:17,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:17,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1321164330, now seen corresponding path program 1 times [2021-12-06 21:10:17,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:17,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747402126] [2021-12-06 21:10:17,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:17,228 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:17,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:17,230 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:17,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-06 21:10:17,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:10:17,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:17,457 INFO L354 Elim1Store]: treesize reduction 27, result has 50.9 percent of original size [2021-12-06 21:10:17,458 INFO L388 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 2 case distinctions, treesize of input 12 treesize of output 33 [2021-12-06 21:10:17,501 INFO L354 Elim1Store]: treesize reduction 33, result has 40.0 percent of original size [2021-12-06 21:10:17,501 INFO L388 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 2 case distinctions, treesize of input 12 treesize of output 27 [2021-12-06 21:10:17,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:17,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:17,585 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:10:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:10:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:17,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:17,620 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:17,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747402126] [2021-12-06 21:10:17,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747402126] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:17,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:17,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:17,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367322388] [2021-12-06 21:10:17,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:17,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:17,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:17,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:17,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:17,621 INFO L87 Difference]: Start difference. First operand 222 states and 247 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:18,130 INFO L93 Difference]: Finished difference Result 214 states and 238 transitions. [2021-12-06 21:10:18,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:18,130 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-06 21:10:18,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:18,132 INFO L225 Difference]: With dead ends: 214 [2021-12-06 21:10:18,132 INFO L226 Difference]: Without dead ends: 214 [2021-12-06 21:10:18,132 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:18,133 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 40 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:18,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 535 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 311 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-06 21:10:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-12-06 21:10:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2021-12-06 21:10:18,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 120 states have (on average 1.7166666666666666) internal successors, (206), 199 states have internal predecessors, (206), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:18,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 238 transitions. [2021-12-06 21:10:18,140 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 238 transitions. Word has length 10 [2021-12-06 21:10:18,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:18,140 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 238 transitions. [2021-12-06 21:10:18,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,141 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 238 transitions. [2021-12-06 21:10:18,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:10:18,141 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:18,141 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:18,148 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-06 21:10:18,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:18,342 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting chain_nodeErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:18,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:18,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1993578833, now seen corresponding path program 1 times [2021-12-06 21:10:18,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:18,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092349779] [2021-12-06 21:10:18,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:18,346 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:18,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:18,349 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:18,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-06 21:10:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 21:10:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:18,468 INFO L388 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 [2021-12-06 21:10:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:18,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:18,489 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:18,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092349779] [2021-12-06 21:10:18,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092349779] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:18,489 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:18,489 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:18,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738405361] [2021-12-06 21:10:18,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:18,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:18,490 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:18,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:18,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:18,490 INFO L87 Difference]: Start difference. First operand 214 states and 238 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:18,820 INFO L93 Difference]: Finished difference Result 213 states and 237 transitions. [2021-12-06 21:10:18,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:18,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:10:18,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:18,822 INFO L225 Difference]: With dead ends: 213 [2021-12-06 21:10:18,822 INFO L226 Difference]: Without dead ends: 213 [2021-12-06 21:10:18,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:18,823 INFO L933 BasicCegarLoop]: 213 mSDtfsCounter, 26 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:18,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 618 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:10:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2021-12-06 21:10:18,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2021-12-06 21:10:18,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 120 states have (on average 1.7083333333333333) internal successors, (205), 198 states have internal predecessors, (205), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 237 transitions. [2021-12-06 21:10:18,831 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 237 transitions. Word has length 11 [2021-12-06 21:10:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:18,831 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 237 transitions. [2021-12-06 21:10:18,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 237 transitions. [2021-12-06 21:10:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-06 21:10:18,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:18,832 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:18,839 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-06 21:10:19,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:19,034 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting chain_nodeErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:19,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:19,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1993578834, now seen corresponding path program 1 times [2021-12-06 21:10:19,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:19,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691046080] [2021-12-06 21:10:19,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:19,037 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:19,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:19,040 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:19,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-06 21:10:19,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:19,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-06 21:10:19,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:19,113 INFO L388 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 [2021-12-06 21:10:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:19,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:19,155 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:19,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691046080] [2021-12-06 21:10:19,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691046080] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:19,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:19,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:19,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796498890] [2021-12-06 21:10:19,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:19,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:19,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:19,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:19,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:19,156 INFO L87 Difference]: Start difference. First operand 213 states and 237 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:19,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:19,609 INFO L93 Difference]: Finished difference Result 212 states and 236 transitions. [2021-12-06 21:10:19,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:19,609 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-06 21:10:19,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:19,611 INFO L225 Difference]: With dead ends: 212 [2021-12-06 21:10:19,611 INFO L226 Difference]: Without dead ends: 212 [2021-12-06 21:10:19,611 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:19,611 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 23 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:19,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 635 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-06 21:10:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-12-06 21:10:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-12-06 21:10:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 120 states have (on average 1.7) internal successors, (204), 197 states have internal predecessors, (204), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 236 transitions. [2021-12-06 21:10:19,617 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 236 transitions. Word has length 11 [2021-12-06 21:10:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:19,617 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 236 transitions. [2021-12-06 21:10:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 236 transitions. [2021-12-06 21:10:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-06 21:10:19,618 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:19,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:19,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:19,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:19,819 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting chain_nodeErr8REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:19,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:19,819 INFO L85 PathProgramCache]: Analyzing trace with hash 273848882, now seen corresponding path program 1 times [2021-12-06 21:10:19,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:19,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [572040321] [2021-12-06 21:10:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:19,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:19,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:19,820 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:19,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-06 21:10:19,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:19,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 21:10:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:19,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:19,891 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:19,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [572040321] [2021-12-06 21:10:19,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [572040321] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:19,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:19,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 21:10:19,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749999253] [2021-12-06 21:10:19,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:19,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 21:10:19,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 21:10:19,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:19,892 INFO L87 Difference]: Start difference. First operand 212 states and 236 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:20,057 INFO L93 Difference]: Finished difference Result 211 states and 235 transitions. [2021-12-06 21:10:20,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 21:10:20,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-06 21:10:20,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:20,058 INFO L225 Difference]: With dead ends: 211 [2021-12-06 21:10:20,058 INFO L226 Difference]: Without dead ends: 211 [2021-12-06 21:10:20,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 21:10:20,059 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 2 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:20,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 358 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 21:10:20,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2021-12-06 21:10:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2021-12-06 21:10:20,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 120 states have (on average 1.6916666666666667) internal successors, (203), 196 states have internal predecessors, (203), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:20,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2021-12-06 21:10:20,065 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 13 [2021-12-06 21:10:20,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:20,065 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2021-12-06 21:10:20,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 21:10:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2021-12-06 21:10:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:10:20,065 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:20,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:20,073 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-06 21:10:20,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:20,267 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:20,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:20,269 INFO L85 PathProgramCache]: Analyzing trace with hash 2066019085, now seen corresponding path program 1 times [2021-12-06 21:10:20,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:20,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1418742367] [2021-12-06 21:10:20,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:20,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:20,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:20,273 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:20,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-06 21:10:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:20,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-06 21:10:20,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:20,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:10:20,390 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-12-06 21:10:20,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 111 treesize of output 116 [2021-12-06 21:10:20,541 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 21:10:20,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 20 [2021-12-06 21:10:20,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:20,559 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:20,559 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:20,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1418742367] [2021-12-06 21:10:20,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1418742367] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:20,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:20,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 21:10:20,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010241584] [2021-12-06 21:10:20,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:20,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 21:10:20,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:20,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 21:10:20,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:20,560 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:20,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:20,721 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2021-12-06 21:10:20,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:20,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-06 21:10:20,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:20,723 INFO L225 Difference]: With dead ends: 210 [2021-12-06 21:10:20,723 INFO L226 Difference]: Without dead ends: 210 [2021-12-06 21:10:20,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-06 21:10:20,724 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 44 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 260 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:20,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 448 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 77 Invalid, 0 Unknown, 260 Unchecked, 0.2s Time] [2021-12-06 21:10:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-12-06 21:10:20,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2021-12-06 21:10:20,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 120 states have (on average 1.6833333333333333) internal successors, (202), 195 states have internal predecessors, (202), 20 states have call successors, (20), 5 states have call predecessors, (20), 3 states have return successors, (12), 9 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:20,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 234 transitions. [2021-12-06 21:10:20,729 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 234 transitions. Word has length 18 [2021-12-06 21:10:20,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:20,730 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 234 transitions. [2021-12-06 21:10:20,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:20,730 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 234 transitions. [2021-12-06 21:10:20,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-06 21:10:20,731 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:20,731 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:20,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-06 21:10:20,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:20,933 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:20,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:20,934 INFO L85 PathProgramCache]: Analyzing trace with hash 2066019086, now seen corresponding path program 1 times [2021-12-06 21:10:20,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:20,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1524408093] [2021-12-06 21:10:20,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:20,936 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:20,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:20,938 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:20,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-06 21:10:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:21,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:10:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:21,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:21,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:21,171 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:10:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 21:10:21,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2021-12-06 21:10:21,278 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:10:21,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 18 [2021-12-06 21:10:21,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:21,337 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:21,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:21,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1524408093] [2021-12-06 21:10:21,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1524408093] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:21,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:21,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 21:10:21,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967252074] [2021-12-06 21:10:21,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:21,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 21:10:21,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:21,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 21:10:21,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:21,339 INFO L87 Difference]: Start difference. First operand 210 states and 234 transitions. Second operand has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:21,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:21,691 INFO L93 Difference]: Finished difference Result 227 states and 252 transitions. [2021-12-06 21:10:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 21:10:21,691 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-12-06 21:10:21,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:21,693 INFO L225 Difference]: With dead ends: 227 [2021-12-06 21:10:21,693 INFO L226 Difference]: Without dead ends: 227 [2021-12-06 21:10:21,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-06 21:10:21,693 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 45 mSDsluCounter, 373 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:21,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 581 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 186 Invalid, 0 Unknown, 264 Unchecked, 0.3s Time] [2021-12-06 21:10:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-12-06 21:10:21,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2021-12-06 21:10:21,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 134 states have (on average 1.626865671641791) internal successors, (218), 209 states have internal predecessors, (218), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (13), 10 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 21:10:21,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 252 transitions. [2021-12-06 21:10:21,700 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 252 transitions. Word has length 18 [2021-12-06 21:10:21,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:21,700 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 252 transitions. [2021-12-06 21:10:21,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:21,700 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 252 transitions. [2021-12-06 21:10:21,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-12-06 21:10:21,701 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:21,701 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:21,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Ended with exit code 0 [2021-12-06 21:10:21,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:21,903 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting chain_nodeErr4REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:21,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:21,904 INFO L85 PathProgramCache]: Analyzing trace with hash 823372381, now seen corresponding path program 1 times [2021-12-06 21:10:21,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:21,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [824707251] [2021-12-06 21:10:21,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:21,904 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:21,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:21,905 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:21,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-06 21:10:22,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:22,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-06 21:10:22,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:22,025 INFO L388 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 [2021-12-06 21:10:22,067 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-06 21:10:22,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 21:10:22,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:22,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:22,209 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:22,209 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:22,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [824707251] [2021-12-06 21:10:22,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [824707251] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 21:10:22,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:22,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-12-06 21:10:22,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206698174] [2021-12-06 21:10:22,210 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:22,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:22,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:22,212 INFO L87 Difference]: Start difference. First operand 226 states and 252 transitions. Second operand has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:22,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:22,567 INFO L93 Difference]: Finished difference Result 225 states and 250 transitions. [2021-12-06 21:10:22,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 21:10:22,568 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-12-06 21:10:22,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:22,569 INFO L225 Difference]: With dead ends: 225 [2021-12-06 21:10:22,569 INFO L226 Difference]: Without dead ends: 225 [2021-12-06 21:10:22,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:22,570 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 32 mSDsluCounter, 391 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 595 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:22,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 595 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 21:10:22,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-12-06 21:10:22,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 216. [2021-12-06 21:10:22,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 200 states have internal predecessors, (209), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 21:10:22,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 239 transitions. [2021-12-06 21:10:22,575 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 239 transitions. Word has length 24 [2021-12-06 21:10:22,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:22,576 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 239 transitions. [2021-12-06 21:10:22,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 5.166666666666667) internal successors, (31), 7 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-06 21:10:22,576 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 239 transitions. [2021-12-06 21:10:22,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-06 21:10:22,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:22,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:22,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-06 21:10:22,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:22,778 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:22,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1607136150, now seen corresponding path program 1 times [2021-12-06 21:10:22,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:22,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312398522] [2021-12-06 21:10:22,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:22,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:22,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-06 21:10:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:22,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 21:10:22,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:22,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:22,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:22,977 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:10:22,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 21:10:22,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 94 [2021-12-06 21:10:23,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:23,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:23,198 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:23,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:23,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:23,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:23,677 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312398522] [2021-12-06 21:10:23,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [312398522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:23,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1959117803] [2021-12-06 21:10:23,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:23,678 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:23,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:10:23,679 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:10:23,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-06 21:10:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:23,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-06 21:10:23,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:23,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:23,999 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-06 21:10:23,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2021-12-06 21:10:24,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-12-06 21:10:24,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:24,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:24,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:24,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:24,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:24,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:24,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:10:24,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:24,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1959117803] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:24,590 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:24,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-12-06 21:10:24,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999486743] [2021-12-06 21:10:24,590 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:24,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:10:24,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:24,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:10:24,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-06 21:10:24,591 INFO L87 Difference]: Start difference. First operand 216 states and 239 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:25,140 INFO L93 Difference]: Finished difference Result 242 states and 265 transitions. [2021-12-06 21:10:25,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:10:25,140 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-12-06 21:10:25,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:25,142 INFO L225 Difference]: With dead ends: 242 [2021-12-06 21:10:25,142 INFO L226 Difference]: Without dead ends: 242 [2021-12-06 21:10:25,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-06 21:10:25,143 INFO L933 BasicCegarLoop]: 221 mSDtfsCounter, 15 mSDsluCounter, 829 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 411 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:25,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 1050 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 317 Invalid, 0 Unknown, 411 Unchecked, 0.5s Time] [2021-12-06 21:10:25,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-12-06 21:10:25,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 238. [2021-12-06 21:10:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 147 states have (on average 1.5510204081632653) internal successors, (228), 220 states have internal predecessors, (228), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (12), 10 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 260 transitions. [2021-12-06 21:10:25,151 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 260 transitions. Word has length 32 [2021-12-06 21:10:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:25,152 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 260 transitions. [2021-12-06 21:10:25,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 260 transitions. [2021-12-06 21:10:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 21:10:25,153 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:25,153 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:25,156 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-12-06 21:10:25,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-06 21:10:25,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:25,555 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:25,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:25,557 INFO L85 PathProgramCache]: Analyzing trace with hash 230094096, now seen corresponding path program 1 times [2021-12-06 21:10:25,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:25,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23440388] [2021-12-06 21:10:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:25,560 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:25,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:25,561 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:25,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-06 21:10:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:25,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 21:10:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:25,751 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 21:10:25,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 50 [2021-12-06 21:10:25,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 21:10:25,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:25,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 23 [2021-12-06 21:10:26,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 21:10:26,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:26,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-06 21:10:26,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:26,483 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:26,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:26,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23440388] [2021-12-06 21:10:26,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23440388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:26,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:26,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:10:26,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351943823] [2021-12-06 21:10:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:10:26,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:26,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:10:26,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:26,484 INFO L87 Difference]: Start difference. First operand 238 states and 260 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:10:26,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:26,750 INFO L93 Difference]: Finished difference Result 254 states and 278 transitions. [2021-12-06 21:10:26,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:10:26,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-06 21:10:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:26,752 INFO L225 Difference]: With dead ends: 254 [2021-12-06 21:10:26,752 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 21:10:26,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:26,752 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:26,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 920 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 244 Invalid, 0 Unknown, 291 Unchecked, 0.3s Time] [2021-12-06 21:10:26,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 21:10:26,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 226. [2021-12-06 21:10:26,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 138 states have (on average 1.5942028985507246) internal successors, (220), 209 states have internal predecessors, (220), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:10:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 248 transitions. [2021-12-06 21:10:26,758 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 248 transitions. Word has length 35 [2021-12-06 21:10:26,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:26,758 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 248 transitions. [2021-12-06 21:10:26,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:10:26,758 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 248 transitions. [2021-12-06 21:10:26,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 21:10:26,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:26,759 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:26,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-06 21:10:26,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:26,959 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:26,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:26,960 INFO L85 PathProgramCache]: Analyzing trace with hash 230094097, now seen corresponding path program 1 times [2021-12-06 21:10:26,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:26,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1666883542] [2021-12-06 21:10:26,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:26,961 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:26,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:26,961 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:26,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-06 21:10:27,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:27,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 21:10:27,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:27,155 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:27,181 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 21:10:27,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 21:10:27,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:10:27,241 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:27,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:10:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:27,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:27,397 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:27,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 21:10:27,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:27,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:10:27,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:27,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:27,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:27,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 22 [2021-12-06 21:10:27,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:27,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:27,946 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:27,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1666883542] [2021-12-06 21:10:27,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1666883542] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:27,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:27,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-06 21:10:27,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111901345] [2021-12-06 21:10:27,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:27,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-06 21:10:27,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:27,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-06 21:10:27,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:27,947 INFO L87 Difference]: Start difference. First operand 226 states and 248 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:10:28,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:28,367 INFO L93 Difference]: Finished difference Result 240 states and 262 transitions. [2021-12-06 21:10:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 21:10:28,368 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-12-06 21:10:28,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:28,369 INFO L225 Difference]: With dead ends: 240 [2021-12-06 21:10:28,369 INFO L226 Difference]: Without dead ends: 240 [2021-12-06 21:10:28,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:10:28,370 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 7 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 331 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:28,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 800 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 194 Invalid, 0 Unknown, 331 Unchecked, 0.4s Time] [2021-12-06 21:10:28,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-12-06 21:10:28,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 226. [2021-12-06 21:10:28,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 138 states have (on average 1.5869565217391304) internal successors, (219), 209 states have internal predecessors, (219), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-06 21:10:28,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 247 transitions. [2021-12-06 21:10:28,375 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 247 transitions. Word has length 35 [2021-12-06 21:10:28,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:28,375 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 247 transitions. [2021-12-06 21:10:28,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-06 21:10:28,375 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 247 transitions. [2021-12-06 21:10:28,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:10:28,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:28,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:28,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:28,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:28,578 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:28,579 INFO L85 PathProgramCache]: Analyzing trace with hash -304151576, now seen corresponding path program 1 times [2021-12-06 21:10:28,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:28,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1725642746] [2021-12-06 21:10:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:28,581 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:28,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:28,582 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:28,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-06 21:10:28,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:28,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-06 21:10:28,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:28,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:10:28,876 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 21:10:28,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 46 [2021-12-06 21:10:28,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-12-06 21:10:29,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:29,131 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 21:10:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 47 [2021-12-06 21:10:29,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 21:10:29,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:29,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-06 21:10:29,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 14 [2021-12-06 21:10:30,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:30,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 25 [2021-12-06 21:10:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:10:30,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:30,529 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1725642746] [2021-12-06 21:10:30,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1725642746] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:30,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1093377526] [2021-12-06 21:10:30,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:30,529 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:30,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:10:30,530 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:10:30,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-12-06 21:10:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:30,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 21:10:30,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:31,001 INFO L354 Elim1Store]: treesize reduction 76, result has 35.0 percent of original size [2021-12-06 21:10:31,001 INFO L388 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 5 case distinctions, treesize of input 39 treesize of output 68 [2021-12-06 21:10:31,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:31,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2021-12-06 21:10:31,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:31,693 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:10:31,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 43 [2021-12-06 21:10:32,403 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2021-12-06 21:10:32,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:32,692 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:10:32,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 54 [2021-12-06 21:10:33,554 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 53 [2021-12-06 21:10:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:33,917 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:10:33,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2021-12-06 21:10:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:10:35,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:36,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1093377526] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:36,036 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:36,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 21:10:36,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467439668] [2021-12-06 21:10:36,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:36,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:10:36,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:36,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:10:36,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:10:36,038 INFO L87 Difference]: Start difference. First operand 226 states and 247 transitions. Second operand has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:10:36,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:36,546 INFO L93 Difference]: Finished difference Result 276 states and 302 transitions. [2021-12-06 21:10:36,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 21:10:36,547 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-12-06 21:10:36,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:36,549 INFO L225 Difference]: With dead ends: 276 [2021-12-06 21:10:36,549 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 21:10:36,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 80 SyntacticMatches, 9 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2021-12-06 21:10:36,549 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 10 mSDsluCounter, 1376 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1591 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 579 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:36,550 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1591 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 193 Invalid, 0 Unknown, 579 Unchecked, 0.2s Time] [2021-12-06 21:10:36,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 21:10:36,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 273. [2021-12-06 21:10:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 179 states have (on average 1.4748603351955307) internal successors, (264), 250 states have internal predecessors, (264), 21 states have call successors, (21), 9 states have call predecessors, (21), 8 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-12-06 21:10:36,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 298 transitions. [2021-12-06 21:10:36,556 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 298 transitions. Word has length 49 [2021-12-06 21:10:36,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:36,556 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 298 transitions. [2021-12-06 21:10:36,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 3.857142857142857) internal successors, (54), 15 states have internal predecessors, (54), 5 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:10:36,556 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 298 transitions. [2021-12-06 21:10:36,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 21:10:36,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:36,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:36,560 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-12-06 21:10:36,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-12-06 21:10:36,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:36,959 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:36,960 INFO L85 PathProgramCache]: Analyzing trace with hash -304151575, now seen corresponding path program 1 times [2021-12-06 21:10:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:36,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1074144686] [2021-12-06 21:10:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:36,963 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:36,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:36,964 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:36,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-06 21:10:37,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:37,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 21:10:37,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:37,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:37,259 INFO L354 Elim1Store]: treesize reduction 24, result has 38.5 percent of original size [2021-12-06 21:10:37,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 21:10:37,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:10:37,297 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:37,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:10:37,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:37,506 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 21:10:37,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 26 [2021-12-06 21:10:37,658 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:37,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 21:10:37,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 21:10:37,871 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:37,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:37,878 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:37,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 31 [2021-12-06 21:10:37,893 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:10:37,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:10:38,040 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:38,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:10:38,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:38,233 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-06 21:10:38,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 30 [2021-12-06 21:10:38,902 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:38,902 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:39,122 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:39,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1074144686] [2021-12-06 21:10:39,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1074144686] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:39,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [888665008] [2021-12-06 21:10:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:39,122 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:39,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:10:39,123 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:10:39,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Waiting until timeout for monitored process [2021-12-06 21:10:39,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:39,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 21:10:39,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:39,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:39,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:39,602 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:10:39,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 20 [2021-12-06 21:10:39,618 INFO L354 Elim1Store]: treesize reduction 2, result has 75.0 percent of original size [2021-12-06 21:10:39,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 69 [2021-12-06 21:10:39,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:39,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:39,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:39,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:40,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:40,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:40,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:40,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:40,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 21:10:40,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [888665008] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:44,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:10:44,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 16 [2021-12-06 21:10:44,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129568245] [2021-12-06 21:10:44,538 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:10:44,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:10:44,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:44,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:10:44,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:10:44,539 INFO L87 Difference]: Start difference. First operand 273 states and 298 transitions. Second operand has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:10:45,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:45,635 INFO L93 Difference]: Finished difference Result 291 states and 318 transitions. [2021-12-06 21:10:45,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-06 21:10:45,636 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 49 [2021-12-06 21:10:45,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:45,637 INFO L225 Difference]: With dead ends: 291 [2021-12-06 21:10:45,638 INFO L226 Difference]: Without dead ends: 291 [2021-12-06 21:10:45,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-12-06 21:10:45,638 INFO L933 BasicCegarLoop]: 215 mSDtfsCounter, 34 mSDsluCounter, 1113 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 631 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:45,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 1328 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 560 Invalid, 0 Unknown, 631 Unchecked, 0.8s Time] [2021-12-06 21:10:45,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-12-06 21:10:45,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 268. [2021-12-06 21:10:45,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 176 states have (on average 1.4659090909090908) internal successors, (258), 246 states have internal predecessors, (258), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:45,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 290 transitions. [2021-12-06 21:10:45,644 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 290 transitions. Word has length 49 [2021-12-06 21:10:45,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:45,644 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 290 transitions. [2021-12-06 21:10:45,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.571428571428571) internal successors, (64), 14 states have internal predecessors, (64), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:10:45,645 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 290 transitions. [2021-12-06 21:10:45,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:10:45,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:45,645 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:45,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-06 21:10:45,850 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (20)] Ended with exit code 0 [2021-12-06 21:10:46,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:46,047 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:46,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:46,049 INFO L85 PathProgramCache]: Analyzing trace with hash 742718239, now seen corresponding path program 1 times [2021-12-06 21:10:46,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:46,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1415618052] [2021-12-06 21:10:46,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:46,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:46,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:46,053 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:46,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-06 21:10:46,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:46,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 21:10:46,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:46,361 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:10:46,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 67 [2021-12-06 21:10:46,419 INFO L388 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 [2021-12-06 21:10:46,540 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-06 21:10:46,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-06 21:10:46,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:10:46,567 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:46,567 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:46,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1415618052] [2021-12-06 21:10:46,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1415618052] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:46,567 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:46,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:46,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969118366] [2021-12-06 21:10:46,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:46,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:46,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:46,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:46,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:10:46,568 INFO L87 Difference]: Start difference. First operand 268 states and 290 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:47,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:47,068 INFO L93 Difference]: Finished difference Result 274 states and 298 transitions. [2021-12-06 21:10:47,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:10:47,068 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-06 21:10:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:47,069 INFO L225 Difference]: With dead ends: 274 [2021-12-06 21:10:47,069 INFO L226 Difference]: Without dead ends: 274 [2021-12-06 21:10:47,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-06 21:10:47,070 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 161 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:47,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 448 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 446 Invalid, 0 Unknown, 151 Unchecked, 0.5s Time] [2021-12-06 21:10:47,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-12-06 21:10:47,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 261. [2021-12-06 21:10:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 176 states have (on average 1.4261363636363635) internal successors, (251), 239 states have internal predecessors, (251), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-12-06 21:10:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 283 transitions. [2021-12-06 21:10:47,075 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 283 transitions. Word has length 55 [2021-12-06 21:10:47,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:47,075 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 283 transitions. [2021-12-06 21:10:47,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:47,076 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 283 transitions. [2021-12-06 21:10:47,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 21:10:47,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:47,076 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:47,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-06 21:10:47,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:47,277 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:47,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:47,277 INFO L85 PathProgramCache]: Analyzing trace with hash 742718240, now seen corresponding path program 1 times [2021-12-06 21:10:47,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:47,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [521905140] [2021-12-06 21:10:47,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:47,278 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:47,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:47,279 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:47,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-06 21:10:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-06 21:10:47,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:49,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:49,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:10:49,737 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:10:49,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:10:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:10:49,780 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:49,780 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:49,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [521905140] [2021-12-06 21:10:49,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [521905140] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:49,781 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:10:49,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:10:49,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148695266] [2021-12-06 21:10:49,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:49,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:10:49,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:49,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:10:49,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=29, Unknown=1, NotChecked=0, Total=42 [2021-12-06 21:10:49,782 INFO L87 Difference]: Start difference. First operand 261 states and 283 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:50,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:50,844 INFO L93 Difference]: Finished difference Result 386 states and 424 transitions. [2021-12-06 21:10:50,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:10:50,845 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-06 21:10:50,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:50,847 INFO L225 Difference]: With dead ends: 386 [2021-12-06 21:10:50,847 INFO L226 Difference]: Without dead ends: 386 [2021-12-06 21:10:50,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2021-12-06 21:10:50,848 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 163 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:50,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 444 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 570 Invalid, 0 Unknown, 176 Unchecked, 1.0s Time] [2021-12-06 21:10:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-06 21:10:50,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 322. [2021-12-06 21:10:50,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 231 states have (on average 1.4891774891774892) internal successors, (344), 294 states have internal predecessors, (344), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:10:50,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 388 transitions. [2021-12-06 21:10:50,854 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 388 transitions. Word has length 55 [2021-12-06 21:10:50,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:50,855 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 388 transitions. [2021-12-06 21:10:50,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:10:50,855 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 388 transitions. [2021-12-06 21:10:50,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:10:50,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:50,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:50,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-06 21:10:51,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:51,057 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:51,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:51,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1549429147, now seen corresponding path program 1 times [2021-12-06 21:10:51,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:51,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [226402631] [2021-12-06 21:10:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:51,060 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:51,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:51,063 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:51,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-06 21:10:51,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:51,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 21:10:51,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:51,320 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:10:51,338 INFO L354 Elim1Store]: treesize reduction 38, result has 30.9 percent of original size [2021-12-06 21:10:51,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 64 [2021-12-06 21:10:51,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:10:51,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:51,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:51,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:10:51,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:51,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 21:10:51,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:10:52,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:52,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:52,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:10:52,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:52,292 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:52,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [226402631] [2021-12-06 21:10:52,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [226402631] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:52,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1715414470] [2021-12-06 21:10:52,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:52,293 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:52,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:10:52,294 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:10:52,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Waiting until timeout for monitored process [2021-12-06 21:10:52,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:52,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-06 21:10:52,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:52,822 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:10:52,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 61 [2021-12-06 21:10:52,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:10:53,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:53,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:53,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 21:10:53,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:53,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:53,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:10:53,305 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:10:53,305 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:10:53,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1715414470] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:10:53,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:10:53,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 14 [2021-12-06 21:10:53,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990706194] [2021-12-06 21:10:53,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:10:53,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 21:10:53,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:10:53,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 21:10:53,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-12-06 21:10:53,306 INFO L87 Difference]: Start difference. First operand 322 states and 388 transitions. Second operand has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:10:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:10:53,743 INFO L93 Difference]: Finished difference Result 336 states and 402 transitions. [2021-12-06 21:10:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:10:53,744 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 56 [2021-12-06 21:10:53,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:10:53,745 INFO L225 Difference]: With dead ends: 336 [2021-12-06 21:10:53,745 INFO L226 Difference]: Without dead ends: 336 [2021-12-06 21:10:53,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 96 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=357, Unknown=0, NotChecked=0, Total=462 [2021-12-06 21:10:53,746 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 26 mSDsluCounter, 920 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 1114 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 276 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:10:53,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 1114 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 233 Invalid, 0 Unknown, 276 Unchecked, 0.3s Time] [2021-12-06 21:10:53,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-12-06 21:10:53,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 334. [2021-12-06 21:10:53,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 242 states have (on average 1.462809917355372) internal successors, (354), 305 states have internal predecessors, (354), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:10:53,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 398 transitions. [2021-12-06 21:10:53,752 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 398 transitions. Word has length 56 [2021-12-06 21:10:53,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:10:53,753 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 398 transitions. [2021-12-06 21:10:53,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 9 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-06 21:10:53,753 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 398 transitions. [2021-12-06 21:10:53,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-06 21:10:53,753 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:10:53,753 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:10:53,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (24)] Forceful destruction successful, exit code 0 [2021-12-06 21:10:53,986 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-06 21:10:54,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:10:54,155 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:10:54,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:10:54,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1549429148, now seen corresponding path program 1 times [2021-12-06 21:10:54,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:10:54,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1162479031] [2021-12-06 21:10:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:54,158 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:10:54,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:10:54,161 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:10:54,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-06 21:10:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:54,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:10:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:54,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:54,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:10:54,631 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:10:54,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 21:10:54,746 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:10:54,746 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:10:54,838 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:10:54,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:10:55,099 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:10:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1162479031] [2021-12-06 21:10:55,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1162479031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:10:55,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [739175204] [2021-12-06 21:10:55,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:10:55,099 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:10:55,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:10:55,100 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:10:55,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-12-06 21:10:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:10:55,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 21:10:55,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:10:55,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:55,526 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-06 21:10:55,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2021-12-06 21:10:55,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 110 [2021-12-06 21:10:55,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:10:57,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:10:57,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:10:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:11:00,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:00,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:11:00,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:11:00,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:00,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:11:00,415 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-06 21:11:00,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:11:00,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [739175204] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:11:00,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-06 21:11:00,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9] total 15 [2021-12-06 21:11:00,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680026307] [2021-12-06 21:11:00,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:11:00,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-06 21:11:00,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:11:00,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-06 21:11:00,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=246, Unknown=2, NotChecked=0, Total=306 [2021-12-06 21:11:00,417 INFO L87 Difference]: Start difference. First operand 334 states and 398 transitions. Second operand has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:11:00,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:00,912 INFO L93 Difference]: Finished difference Result 335 states and 399 transitions. [2021-12-06 21:11:00,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-06 21:11:00,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-06 21:11:00,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:00,915 INFO L225 Difference]: With dead ends: 335 [2021-12-06 21:11:00,915 INFO L226 Difference]: Without dead ends: 335 [2021-12-06 21:11:00,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=58, Invalid=246, Unknown=2, NotChecked=0, Total=306 [2021-12-06 21:11:00,916 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 20 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 724 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:00,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 724 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 269 Invalid, 0 Unknown, 203 Unchecked, 0.5s Time] [2021-12-06 21:11:00,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-12-06 21:11:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 334. [2021-12-06 21:11:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 242 states have (on average 1.4586776859504131) internal successors, (353), 305 states have internal predecessors, (353), 26 states have call successors, (26), 10 states have call predecessors, (26), 9 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:11:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 397 transitions. [2021-12-06 21:11:00,923 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 397 transitions. Word has length 56 [2021-12-06 21:11:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:00,923 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 397 transitions. [2021-12-06 21:11:00,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-06 21:11:00,923 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 397 transitions. [2021-12-06 21:11:00,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-06 21:11:00,924 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:00,924 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:00,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (26)] Ended with exit code 0 [2021-12-06 21:11:01,138 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Ended with exit code 0 [2021-12-06 21:11:01,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:11:01,326 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:11:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:01,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1700762914, now seen corresponding path program 1 times [2021-12-06 21:11:01,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:11:01,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1709964543] [2021-12-06 21:11:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:01,328 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:11:01,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:11:01,329 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:11:01,329 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-06 21:11:01,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:01,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-06 21:11:01,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:01,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:11:01,907 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:11:01,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-06 21:11:02,297 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32)) (v_ArrVal_1749 (Array (_ BitVec 32) (_ BitVec 32)))) (and (not (= |chain_node_~node~0#1.base| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |chain_node_~node~0#1.base|)))) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_1749))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|))) is different from true [2021-12-06 21:11:02,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:02,414 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-06 21:11:02,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 90 [2021-12-06 21:11:02,431 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:11:02,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:11:02,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:02,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 21:11:02,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-12-06 21:11:02,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2021-12-06 21:11:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:02,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 21:11:03,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 48 [2021-12-06 21:11:03,057 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 21:11:03,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2021-12-06 21:11:04,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:11:04,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 67 treesize of output 89 [2021-12-06 21:11:04,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:11:04,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-06 21:11:04,845 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-12-06 21:11:04,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:05,093 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:11:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1709964543] [2021-12-06 21:11:05,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1709964543] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:05,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [77224860] [2021-12-06 21:11:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:05,093 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:11:05,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:11:05,094 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:11:05,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-12-06 21:11:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:05,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 39 conjunts are in the unsatisfiable core [2021-12-06 21:11:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:05,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:11:06,328 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:11:06,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-06 21:11:06,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:11:06,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2021-12-06 21:11:07,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:07,223 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:11:07,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-12-06 21:11:07,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2021-12-06 21:11:09,395 INFO L388 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 [2021-12-06 21:11:13,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-06 21:11:13,554 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:11:13,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:11:13,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:11:13,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:13,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 21:11:13,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [77224860] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:13,877 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:11:13,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 38 [2021-12-06 21:11:13,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5297166] [2021-12-06 21:11:13,877 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:13,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-12-06 21:11:13,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:11:13,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-12-06 21:11:13,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1578, Unknown=16, NotChecked=80, Total=1806 [2021-12-06 21:11:13,879 INFO L87 Difference]: Start difference. First operand 334 states and 397 transitions. Second operand has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:11:26,104 WARN L227 SmtUtils]: Spent 6.77s on a formula simplification. DAG size of input: 54 DAG size of output: 52 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:11:27,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:27,523 INFO L93 Difference]: Finished difference Result 371 states and 437 transitions. [2021-12-06 21:11:27,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 21:11:27,524 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 61 [2021-12-06 21:11:27,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:27,526 INFO L225 Difference]: With dead ends: 371 [2021-12-06 21:11:27,526 INFO L226 Difference]: Without dead ends: 371 [2021-12-06 21:11:27,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=273, Invalid=3114, Unknown=39, NotChecked=114, Total=3540 [2021-12-06 21:11:27,527 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 119 mSDsluCounter, 2710 mSDsCounter, 0 mSdLazyCounter, 1247 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 2894 SdHoareTripleChecker+Invalid, 2180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 897 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:27,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 2894 Invalid, 2180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1247 Invalid, 0 Unknown, 897 Unchecked, 1.7s Time] [2021-12-06 21:11:27,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2021-12-06 21:11:27,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 348. [2021-12-06 21:11:27,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 255 states have (on average 1.4627450980392156) internal successors, (373), 318 states have internal predecessors, (373), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:11:27,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 417 transitions. [2021-12-06 21:11:27,536 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 417 transitions. Word has length 61 [2021-12-06 21:11:27,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:27,536 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 417 transitions. [2021-12-06 21:11:27,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.6578947368421053) internal successors, (101), 35 states have internal predecessors, (101), 6 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:11:27,537 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 417 transitions. [2021-12-06 21:11:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:11:27,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:27,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:27,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-12-06 21:11:27,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (28)] Ended with exit code 0 [2021-12-06 21:11:27,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:11:27,939 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:11:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:27,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1938544488, now seen corresponding path program 1 times [2021-12-06 21:11:27,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:11:27,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [44039200] [2021-12-06 21:11:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:27,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:11:27,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:11:27,944 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:11:27,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-06 21:11:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:28,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-06 21:11:28,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:28,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:11:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:11:28,607 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:11:28,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-06 21:11:28,690 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:11:28,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2021-12-06 21:11:28,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:11:29,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:29,261 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:11:29,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-12-06 21:11:29,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:29,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-06 21:11:29,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 21:11:29,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-06 21:11:29,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 21:11:29,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-06 21:11:30,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:30,451 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-06 21:11:30,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 87 [2021-12-06 21:11:30,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:30,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:30,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:11:30,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 40 [2021-12-06 21:11:30,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:30,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-12-06 21:11:30,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:11:30,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:31,026 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:31,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:31,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:11:31,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 12 [2021-12-06 21:11:39,297 WARN L227 SmtUtils]: Spent 7.54s on a formula simplification. DAG size of input: 40 DAG size of output: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-06 21:11:39,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:11:39,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 43 [2021-12-06 21:11:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 19 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:11:39,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:39,922 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:11:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [44039200] [2021-12-06 21:11:39,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [44039200] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:39,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1729864682] [2021-12-06 21:11:39,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:39,922 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:11:39,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:11:39,923 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:11:39,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Waiting until timeout for monitored process [2021-12-06 21:11:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:40,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 55 conjunts are in the unsatisfiable core [2021-12-06 21:11:40,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:40,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:11:40,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:11:40,684 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:11:40,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-06 21:11:40,825 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:11:40,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 8 [2021-12-06 21:11:41,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:41,827 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:11:41,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 45 [2021-12-06 21:11:41,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 21:11:42,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 21 [2021-12-06 21:11:42,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2021-12-06 21:11:42,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:42,717 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-06 21:11:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 34 [2021-12-06 21:11:42,872 INFO L388 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 [2021-12-06 21:11:43,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-12-06 21:11:43,039 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:11:43,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-06 21:11:43,049 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 22 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-06 21:11:43,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:11:43,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 24 [2021-12-06 21:11:43,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1729864682] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:11:43,393 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:11:43,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 26] total 43 [2021-12-06 21:11:43,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705531993] [2021-12-06 21:11:43,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:11:43,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-12-06 21:11:43,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:11:43,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-12-06 21:11:43,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=1988, Unknown=63, NotChecked=0, Total=2256 [2021-12-06 21:11:43,395 INFO L87 Difference]: Start difference. First operand 348 states and 417 transitions. Second operand has 43 states, 41 states have (on average 1.975609756097561) internal successors, (81), 38 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 21:11:45,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:11:45,460 INFO L93 Difference]: Finished difference Result 424 states and 499 transitions. [2021-12-06 21:11:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-06 21:11:45,461 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.975609756097561) internal successors, (81), 38 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 63 [2021-12-06 21:11:45,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:11:45,463 INFO L225 Difference]: With dead ends: 424 [2021-12-06 21:11:45,463 INFO L226 Difference]: Without dead ends: 424 [2021-12-06 21:11:45,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 104 SyntacticMatches, 8 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1016 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=319, Invalid=3246, Unknown=95, NotChecked=0, Total=3660 [2021-12-06 21:11:45,464 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 61 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 2054 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 685 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:11:45,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 2054 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 402 Invalid, 0 Unknown, 685 Unchecked, 0.8s Time] [2021-12-06 21:11:45,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-12-06 21:11:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 401. [2021-12-06 21:11:45,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 301 states have (on average 1.4186046511627908) internal successors, (427), 366 states have internal predecessors, (427), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 21:11:45,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 479 transitions. [2021-12-06 21:11:45,472 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 479 transitions. Word has length 63 [2021-12-06 21:11:45,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:11:45,472 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 479 transitions. [2021-12-06 21:11:45,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.975609756097561) internal successors, (81), 38 states have internal predecessors, (81), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-06 21:11:45,472 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 479 transitions. [2021-12-06 21:11:45,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:11:45,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:11:45,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:11:45,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (30)] Ended with exit code 0 [2021-12-06 21:11:45,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Forceful destruction successful, exit code 0 [2021-12-06 21:11:45,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:11:45,875 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting check_seq_nextErr0REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:11:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:11:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 1938533645, now seen corresponding path program 1 times [2021-12-06 21:11:45,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:11:45,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89507754] [2021-12-06 21:11:45,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:11:45,879 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:11:45,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:11:45,880 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:11:45,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-12-06 21:11:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:11:46,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:11:46,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:11:46,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:11:46,557 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-12-06 21:11:46,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 43 [2021-12-06 21:11:46,732 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:11:46,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-12-06 21:11:47,247 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32)) (v_ArrVal_2240 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2241 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2237 (_ BitVec 1))) (and (= (store |c_old(#valid)| |chain_node_~node~0#1.base| v_ArrVal_2237) |c_#valid|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |chain_node_~node~0#1.base|))) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2240) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2241) |c_#memory_$Pointer$.base|))) is different from true [2021-12-06 21:11:47,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:47,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:11:47,312 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 21:11:47,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 42 treesize of output 52 [2021-12-06 21:11:47,372 INFO L354 Elim1Store]: treesize reduction 69, result has 37.3 percent of original size [2021-12-06 21:11:47,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 72 [2021-12-06 21:11:47,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 18 [2021-12-06 21:11:47,453 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:11:47,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 21:11:47,939 INFO L354 Elim1Store]: treesize reduction 115, result has 48.0 percent of original size [2021-12-06 21:11:47,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 112 treesize of output 198 [2021-12-06 21:12:45,749 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:12:45,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 168 treesize of output 132 [2021-12-06 21:12:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-12-06 21:12:46,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:12:47,117 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:12:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89507754] [2021-12-06 21:12:47,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89507754] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:12:47,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [55151132] [2021-12-06 21:12:47,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:12:47,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:12:47,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:12:47,118 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:12:47,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-12-06 21:12:47,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:12:47,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 47 conjunts are in the unsatisfiable core [2021-12-06 21:12:47,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:12:47,921 INFO L388 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 [2021-12-06 21:12:48,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:12:48,817 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:12:48,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 30 [2021-12-06 21:12:49,093 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:12:49,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 21 [2021-12-06 21:12:49,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 12 [2021-12-06 21:12:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:12:50,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:12:50,391 INFO L354 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2021-12-06 21:12:50,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 47 treesize of output 57 [2021-12-06 21:12:50,425 INFO L354 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2021-12-06 21:12:50,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 42 [2021-12-06 21:12:50,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:12:50,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-06 21:12:52,205 INFO L354 Elim1Store]: treesize reduction 34, result has 49.3 percent of original size [2021-12-06 21:12:52,205 INFO L388 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 3 case distinctions, treesize of input 57 treesize of output 80 [2021-12-06 21:12:59,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 60 [2021-12-06 21:13:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:13:00,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:01,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [55151132] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:01,337 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:13:01,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 46 [2021-12-06 21:13:01,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139165299] [2021-12-06 21:13:01,338 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:13:01,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-12-06 21:13:01,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:13:01,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-12-06 21:13:01,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=2551, Unknown=22, NotChecked=102, Total=2862 [2021-12-06 21:13:01,340 INFO L87 Difference]: Start difference. First operand 401 states and 479 transitions. Second operand has 47 states, 45 states have (on average 2.466666666666667) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:13:05,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:05,358 INFO L93 Difference]: Finished difference Result 418 states and 493 transitions. [2021-12-06 21:13:05,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-06 21:13:05,359 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 45 states have (on average 2.466666666666667) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 63 [2021-12-06 21:13:05,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:05,361 INFO L225 Difference]: With dead ends: 418 [2021-12-06 21:13:05,361 INFO L226 Difference]: Without dead ends: 418 [2021-12-06 21:13:05,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 71 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1686 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=342, Invalid=4731, Unknown=43, NotChecked=140, Total=5256 [2021-12-06 21:13:05,363 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 65 mSDsluCounter, 2363 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 3146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2218 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:05,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 2550 Invalid, 3146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 903 Invalid, 0 Unknown, 2218 Unchecked, 1.3s Time] [2021-12-06 21:13:05,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-06 21:13:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 401. [2021-12-06 21:13:05,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 301 states have (on average 1.4119601328903655) internal successors, (425), 366 states have internal predecessors, (425), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 21:13:05,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 477 transitions. [2021-12-06 21:13:05,371 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 477 transitions. Word has length 63 [2021-12-06 21:13:05,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:05,371 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 477 transitions. [2021-12-06 21:13:05,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 45 states have (on average 2.466666666666667) internal successors, (111), 42 states have internal predecessors, (111), 7 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-06 21:13:05,371 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 477 transitions. [2021-12-06 21:13:05,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:13:05,372 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:05,372 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:05,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (31)] Ended with exit code 0 [2021-12-06 21:13:05,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (32)] Ended with exit code 0 [2021-12-06 21:13:05,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:13:05,774 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting check_seq_nextErr1REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:13:05,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:05,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1938533646, now seen corresponding path program 1 times [2021-12-06 21:13:05,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:13:05,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2025426002] [2021-12-06 21:13:05,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:05,777 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:13:05,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:13:05,778 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:13:05,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-12-06 21:13:06,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:06,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-06 21:13:06,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:06,180 INFO L388 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 [2021-12-06 21:13:06,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:06,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:06,461 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:13:06,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2021-12-06 21:13:06,478 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:13:06,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:13:07,055 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32)) (v_ArrVal_2494 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2497 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2495 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_2496 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_2495) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2497) |c_#memory_$Pointer$.base|) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |chain_node_~node~0#1.base|))) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_2494) |c_chain_node_#in~ppnode#1.base| v_ArrVal_2496) |c_#memory_$Pointer$.offset|) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (_ bv8 32))))) is different from true [2021-12-06 21:13:07,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:07,152 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:13:07,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-12-06 21:13:07,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:07,230 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:13:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-12-06 21:13:07,252 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 21:13:07,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:13:07,269 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:13:07,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 17 [2021-12-06 21:13:07,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:13:07,358 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:13:07,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 21:13:07,391 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:13:07,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 32 [2021-12-06 21:13:07,574 INFO L388 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 [2021-12-06 21:13:07,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-06 21:13:07,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:13:07,781 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:13:07,781 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:13:07,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-12-06 21:13:07,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:08,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 21:13:10,296 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:13:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2025426002] [2021-12-06 21:13:10,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2025426002] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:10,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [438777364] [2021-12-06 21:13:10,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:10,296 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:13:10,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:13:10,297 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:13:10,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-12-06 21:13:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:10,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 394 conjuncts, 68 conjunts are in the unsatisfiable core [2021-12-06 21:13:10,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:11,467 INFO L388 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 [2021-12-06 21:13:11,484 INFO L388 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 [2021-12-06 21:13:12,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:12,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:13,426 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:13:13,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2021-12-06 21:13:13,502 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:13:13,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:13:13,827 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:13:13,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 22 [2021-12-06 21:13:13,838 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:13:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:13:16,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:16,777 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:13:16,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 42 [2021-12-06 21:13:16,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:16,961 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:13:16,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 62 [2021-12-06 21:13:16,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:16,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:13:17,017 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-06 21:13:17,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:13:17,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 15 [2021-12-06 21:13:17,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 21:13:17,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:13:18,695 INFO L388 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 [2021-12-06 21:13:20,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-06 21:13:20,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-12-06 21:13:20,593 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:13:20,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:13:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:13:20,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:21,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 21:13:22,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [438777364] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:22,178 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:13:22,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 39 [2021-12-06 21:13:22,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089523988] [2021-12-06 21:13:22,178 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:13:22,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 21:13:22,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:13:22,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 21:13:22,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1920, Unknown=16, NotChecked=88, Total=2162 [2021-12-06 21:13:22,180 INFO L87 Difference]: Start difference. First operand 401 states and 477 transitions. Second operand has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:13:32,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:32,366 INFO L93 Difference]: Finished difference Result 420 states and 492 transitions. [2021-12-06 21:13:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 21:13:32,367 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 63 [2021-12-06 21:13:32,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:32,369 INFO L225 Difference]: With dead ends: 420 [2021-12-06 21:13:32,369 INFO L226 Difference]: Without dead ends: 420 [2021-12-06 21:13:32,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=283, Invalid=3972, Unknown=39, NotChecked=128, Total=4422 [2021-12-06 21:13:32,371 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 102 mSDsluCounter, 1948 mSDsCounter, 0 mSdLazyCounter, 1685 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 2129 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1449 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:32,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 2129 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1685 Invalid, 0 Unknown, 1449 Unchecked, 5.2s Time] [2021-12-06 21:13:32,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-12-06 21:13:32,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 401. [2021-12-06 21:13:32,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 301 states have (on average 1.4053156146179402) internal successors, (423), 366 states have internal predecessors, (423), 30 states have call successors, (30), 14 states have call predecessors, (30), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2021-12-06 21:13:32,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 475 transitions. [2021-12-06 21:13:32,379 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 475 transitions. Word has length 63 [2021-12-06 21:13:32,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:32,380 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 475 transitions. [2021-12-06 21:13:32,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 37 states have internal predecessors, (104), 5 states have call successors, (7), 5 states have call predecessors, (7), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-06 21:13:32,380 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 475 transitions. [2021-12-06 21:13:32,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 21:13:32,380 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:32,380 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:32,384 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (34)] Ended with exit code 0 [2021-12-06 21:13:32,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (33)] Ended with exit code 0 [2021-12-06 21:13:32,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:13:32,782 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:13:32,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:32,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1310388832, now seen corresponding path program 1 times [2021-12-06 21:13:32,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:13:32,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [705082203] [2021-12-06 21:13:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:32,785 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:13:32,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:13:32,787 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:13:32,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-12-06 21:13:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:33,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 31 conjunts are in the unsatisfiable core [2021-12-06 21:13:33,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:33,220 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-06 21:13:33,300 INFO L354 Elim1Store]: treesize reduction 30, result has 45.5 percent of original size [2021-12-06 21:13:33,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 52 [2021-12-06 21:13:33,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2021-12-06 21:13:34,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:34,099 INFO L354 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2021-12-06 21:13:34,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 49 [2021-12-06 21:13:35,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:13:35,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:35,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 31 [2021-12-06 21:13:35,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:13:36,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:36,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-12-06 21:13:36,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:13:37,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:37,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 27 [2021-12-06 21:13:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-06 21:13:37,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:38,050 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:13:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [705082203] [2021-12-06 21:13:38,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [705082203] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:38,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [654058787] [2021-12-06 21:13:38,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:38,051 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:13:38,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:13:38,051 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:13:38,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-12-06 21:13:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:38,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 28 conjunts are in the unsatisfiable core [2021-12-06 21:13:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:38,910 INFO L354 Elim1Store]: treesize reduction 76, result has 35.0 percent of original size [2021-12-06 21:13:38,911 INFO L388 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 5 case distinctions, treesize of input 44 treesize of output 73 [2021-12-06 21:13:39,402 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:13:39,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 33 [2021-12-06 21:13:40,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:40,727 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:13:40,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 47 [2021-12-06 21:13:41,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:13:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2021-12-06 21:13:44,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:44,504 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:13:44,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 52 [2021-12-06 21:13:47,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:13:47,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 36 [2021-12-06 21:13:48,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:49,021 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:13:49,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 56 [2021-12-06 21:13:51,086 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:13:51,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2021-12-06 21:13:51,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:13:51,727 INFO L354 Elim1Store]: treesize reduction 16, result has 42.9 percent of original size [2021-12-06 21:13:51,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 81 treesize of output 89 [2021-12-06 21:13:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 13 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-06 21:13:54,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:13:55,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [654058787] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:13:55,005 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:13:55,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-12-06 21:13:55,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148503299] [2021-12-06 21:13:55,005 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:13:55,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-06 21:13:55,006 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:13:55,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-06 21:13:55,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-12-06 21:13:55,006 INFO L87 Difference]: Start difference. First operand 401 states and 475 transitions. Second operand has 17 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 21:13:56,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:13:56,576 INFO L93 Difference]: Finished difference Result 400 states and 474 transitions. [2021-12-06 21:13:56,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:13:56,577 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) Word has length 63 [2021-12-06 21:13:56,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:13:56,579 INFO L225 Difference]: With dead ends: 400 [2021-12-06 21:13:56,579 INFO L226 Difference]: Without dead ends: 400 [2021-12-06 21:13:56,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 105 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-12-06 21:13:56,580 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 7 mSDsluCounter, 1290 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1494 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 460 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:13:56,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1494 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 288 Invalid, 0 Unknown, 460 Unchecked, 0.9s Time] [2021-12-06 21:13:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-06 21:13:56,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 384. [2021-12-06 21:13:56,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 287 states have (on average 1.4181184668989546) internal successors, (407), 351 states have internal predecessors, (407), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2021-12-06 21:13:56,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 457 transitions. [2021-12-06 21:13:56,588 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 457 transitions. Word has length 63 [2021-12-06 21:13:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:13:56,588 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 457 transitions. [2021-12-06 21:13:56,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2021-12-06 21:13:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 457 transitions. [2021-12-06 21:13:56,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 21:13:56,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:13:56,589 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:13:56,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (36)] Ended with exit code 0 [2021-12-06 21:13:56,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (35)] Ended with exit code 0 [2021-12-06 21:13:56,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:13:56,991 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:13:56,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:13:56,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1484594436, now seen corresponding path program 1 times [2021-12-06 21:13:56,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:13:56,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [214331545] [2021-12-06 21:13:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:13:56,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:13:56,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:13:56,996 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:13:57,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-12-06 21:13:57,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:13:57,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 96 conjunts are in the unsatisfiable core [2021-12-06 21:13:57,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:13:57,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:58,036 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:13:58,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 21 [2021-12-06 21:13:58,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-12-06 21:13:58,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:13:59,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:59,776 INFO L354 Elim1Store]: treesize reduction 62, result has 47.9 percent of original size [2021-12-06 21:13:59,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 131 treesize of output 151 [2021-12-06 21:13:59,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2021-12-06 21:13:59,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 101 [2021-12-06 21:13:59,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:13:59,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-12-06 21:13:59,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:14:00,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:00,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 21:14:00,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:14:00,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 16 [2021-12-06 21:14:00,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 55 [2021-12-06 21:14:00,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-12-06 21:14:00,899 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:14:00,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:14:01,052 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-12-06 21:14:01,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 61 [2021-12-06 21:14:03,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:03,311 INFO L354 Elim1Store]: treesize reduction 64, result has 34.0 percent of original size [2021-12-06 21:14:03,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 77 [2021-12-06 21:14:03,400 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-12-06 21:14:03,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-12-06 21:14:03,799 INFO L354 Elim1Store]: treesize reduction 118, result has 37.6 percent of original size [2021-12-06 21:14:03,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 80 treesize of output 137 [2021-12-06 21:14:03,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2021-12-06 21:14:03,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-06 21:14:04,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:04,918 INFO L354 Elim1Store]: treesize reduction 14, result has 51.7 percent of original size [2021-12-06 21:14:04,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 40 [2021-12-06 21:14:05,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:14:05,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 33 [2021-12-06 21:14:05,272 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 21:14:05,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 17 [2021-12-06 21:14:05,536 INFO L388 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 8 treesize of output 7 [2021-12-06 21:14:05,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-12-06 21:14:05,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:05,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:05,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 19 [2021-12-06 21:14:05,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 16 [2021-12-06 21:14:06,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:14:06,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-12-06 21:14:06,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-12-06 21:14:06,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-12-06 21:14:07,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 40 [2021-12-06 21:14:07,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 32 [2021-12-06 21:14:08,365 INFO L388 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 [2021-12-06 21:14:09,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:09,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 21:14:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:10,506 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-12-06 21:14:10,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 21 [2021-12-06 21:14:11,855 INFO L354 Elim1Store]: treesize reduction 4, result has 84.0 percent of original size [2021-12-06 21:14:11,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 47 [2021-12-06 21:14:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:14:12,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:14:13,085 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:14:13,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 51 [2021-12-06 21:14:14,337 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:14:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [214331545] [2021-12-06 21:14:14,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [214331545] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:14:14,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [724975327] [2021-12-06 21:14:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:14:14,338 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:14:14,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:14:14,338 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:14:14,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-12-06 21:14:14,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:14:14,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 21:14:14,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:14:14,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:14:22,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:14:22,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:14:25,214 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:14:25,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 21:14:25,288 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:14:25,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:14:27,038 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:14:27,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2021-12-06 21:14:27,052 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:14:27,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2021-12-06 21:14:28,142 INFO L388 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 [2021-12-06 21:14:43,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:43,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:43,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:44,098 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-06 21:14:44,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 43 [2021-12-06 21:14:44,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:44,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:44,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:14:44,215 INFO L354 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2021-12-06 21:14:44,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 29 [2021-12-06 21:14:44,235 INFO L388 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 10 treesize of output 9 [2021-12-06 21:14:44,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 11 [2021-12-06 21:14:44,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 26 [2021-12-06 21:14:48,271 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-06 21:14:48,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 55 [2021-12-06 21:14:48,382 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:14:48,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 21:14:49,373 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-06 21:14:49,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 59 treesize of output 42 [2021-12-06 21:14:49,400 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 21:14:49,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 21:14:49,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2021-12-06 21:15:03,500 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:03,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:03,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:03,791 INFO L354 Elim1Store]: treesize reduction 74, result has 35.1 percent of original size [2021-12-06 21:15:03,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 67 treesize of output 96 [2021-12-06 21:15:03,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:03,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:03,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:15:04,031 INFO L354 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2021-12-06 21:15:04,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 31 treesize of output 60 [2021-12-06 21:15:04,085 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-06 21:15:04,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 25 [2021-12-06 21:15:04,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:15:04,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 26 [2021-12-06 21:15:04,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 17 [2021-12-06 21:15:04,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:15:14,885 INFO L388 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 [2021-12-06 21:15:34,535 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 21:15:34,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 21:15:34,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-12-06 21:15:40,910 INFO L354 Elim1Store]: treesize reduction 16, result has 5.9 percent of original size [2021-12-06 21:15:40,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 20 [2021-12-06 21:15:42,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:15:42,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:15:49,600 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:15:49,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 49 [2021-12-06 21:15:52,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [724975327] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:15:52,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:15:52,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 38] total 70 [2021-12-06 21:15:52,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595061964] [2021-12-06 21:15:52,170 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:15:52,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-12-06 21:15:52,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:15:52,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-12-06 21:15:52,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=7087, Unknown=110, NotChecked=0, Total=7482 [2021-12-06 21:15:52,174 INFO L87 Difference]: Start difference. First operand 384 states and 457 transitions. Second operand has 70 states, 66 states have (on average 1.7878787878787878) internal successors, (118), 63 states have internal predecessors, (118), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:16:49,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:16:49,659 INFO L93 Difference]: Finished difference Result 418 states and 495 transitions. [2021-12-06 21:16:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 21:16:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 66 states have (on average 1.7878787878787878) internal successors, (118), 63 states have internal predecessors, (118), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2021-12-06 21:16:49,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:16:49,662 INFO L225 Difference]: With dead ends: 418 [2021-12-06 21:16:49,663 INFO L226 Difference]: Without dead ends: 418 [2021-12-06 21:16:49,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 88 SyntacticMatches, 9 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4372 ImplicationChecksByTransitivity, 115.0s TimeCoverageRelationStatistics Valid=630, Invalid=14709, Unknown=161, NotChecked=0, Total=15500 [2021-12-06 21:16:49,668 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 129 mSDsluCounter, 4813 mSDsCounter, 0 mSdLazyCounter, 1645 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 5001 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3509 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-12-06 21:16:49,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 5001 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1645 Invalid, 0 Unknown, 3509 Unchecked, 6.5s Time] [2021-12-06 21:16:49,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-12-06 21:16:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 356. [2021-12-06 21:16:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 264 states have (on average 1.4545454545454546) internal successors, (384), 327 states have internal predecessors, (384), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:16:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 428 transitions. [2021-12-06 21:16:49,675 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 428 transitions. Word has length 68 [2021-12-06 21:16:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:16:49,675 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 428 transitions. [2021-12-06 21:16:49,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 66 states have (on average 1.7878787878787878) internal successors, (118), 63 states have internal predecessors, (118), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:16:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 428 transitions. [2021-12-06 21:16:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-06 21:16:49,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:16:49,676 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:16:49,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (37)] Ended with exit code 0 [2021-12-06 21:16:49,880 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-12-06 21:16:50,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:16:50,077 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting check_seq_nextErr2REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:16:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:16:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1484584459, now seen corresponding path program 1 times [2021-12-06 21:16:50,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:16:50,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1294557524] [2021-12-06 21:16:50,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:16:50,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:16:50,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:16:50,080 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:16:50,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-12-06 21:16:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:16:50,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 122 conjunts are in the unsatisfiable core [2021-12-06 21:16:50,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:16:50,556 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:16:50,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:16:50,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-06 21:16:51,227 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:16:51,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 21:16:51,307 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:16:51,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 21:16:51,545 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:16:51,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2021-12-06 21:16:51,557 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:16:51,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2021-12-06 21:16:51,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:16:53,822 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((|chain_node_~node~0#1.base| (_ BitVec 32)) (v_ArrVal_3332 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3331 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_3330 (_ BitVec 1))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |chain_node_~node~0#1.base|))) (= (_ bv0 1) (bvadd (bvneg (bvneg v_ArrVal_3330)) (_ bv1 1))) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_3332 (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_3332) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) |c_#memory_$Pointer$.base|) (= (store |c_old(#valid)| |chain_node_~node~0#1.base| v_ArrVal_3330) |c_#valid|) (= (let ((.cse1 (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| (store v_ArrVal_3331 (_ bv0 32) (select (select (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_3331) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse1 |c_chain_node_#in~ppnode#1.base| (store (select .cse1 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| (_ bv0 32)))) |c_#memory_$Pointer$.offset|))) (not (= (bvadd |c_#StackHeapBarrier| (_ bv1 32)) (_ bv0 32)))) is different from true [2021-12-06 21:16:54,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:16:55,190 INFO L354 Elim1Store]: treesize reduction 124, result has 44.9 percent of original size [2021-12-06 21:16:55,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 130 treesize of output 192 [2021-12-06 21:16:55,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 63 [2021-12-06 21:16:55,492 INFO L354 Elim1Store]: treesize reduction 23, result has 42.5 percent of original size [2021-12-06 21:16:55,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-12-06 21:16:55,991 INFO L354 Elim1Store]: treesize reduction 156, result has 46.0 percent of original size [2021-12-06 21:16:55,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 248 [2021-12-06 21:16:56,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 4 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2021-12-06 21:16:56,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:16:56,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:16:56,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:16:56,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2021-12-06 21:16:56,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:16:57,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-12-06 21:16:57,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:16:57,452 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:16:57,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 88 [2021-12-06 21:16:57,797 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:16:57,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 118 treesize of output 126 [2021-12-06 21:16:58,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:16:58,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:16:58,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:16:58,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2021-12-06 21:16:58,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:16:58,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 163 treesize of output 161 [2021-12-06 21:16:59,141 INFO L354 Elim1Store]: treesize reduction 14, result has 56.3 percent of original size [2021-12-06 21:16:59,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 148 treesize of output 143 [2021-12-06 21:17:00,954 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:17:01,181 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:17:01,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 123 treesize of output 127 [2021-12-06 21:17:01,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:17:01,273 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:17:01,835 INFO L354 Elim1Store]: treesize reduction 12, result has 62.5 percent of original size [2021-12-06 21:17:01,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 89 treesize of output 97 [2021-12-06 21:17:02,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:02,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:17:02,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:17:02,352 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-12-06 21:17:02,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 205 treesize of output 184 [2021-12-06 21:17:02,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 104 [2021-12-06 21:17:04,208 INFO L354 Elim1Store]: treesize reduction 52, result has 34.2 percent of original size [2021-12-06 21:17:04,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 139 treesize of output 131 [2021-12-06 21:17:04,397 INFO L354 Elim1Store]: treesize reduction 64, result has 37.9 percent of original size [2021-12-06 21:17:04,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 131 treesize of output 144 [2021-12-06 21:17:06,263 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-12-06 21:17:06,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 152 treesize of output 135 [2021-12-06 21:17:06,464 INFO L354 Elim1Store]: treesize reduction 20, result has 59.2 percent of original size [2021-12-06 21:17:06,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 112 treesize of output 108 [2021-12-06 21:17:06,657 INFO L354 Elim1Store]: treesize reduction 1, result has 97.6 percent of original size [2021-12-06 21:17:06,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 96 treesize of output 125 [2021-12-06 21:17:09,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:09,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:10,404 INFO L354 Elim1Store]: treesize reduction 72, result has 45.9 percent of original size [2021-12-06 21:17:10,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 162 treesize of output 197 [2021-12-06 21:17:10,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:10,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:11,074 INFO L354 Elim1Store]: treesize reduction 220, result has 23.3 percent of original size [2021-12-06 21:17:11,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 167 treesize of output 211 [2021-12-06 21:17:11,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:11,451 INFO L354 Elim1Store]: treesize reduction 10, result has 86.3 percent of original size [2021-12-06 21:17:11,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 148 treesize of output 194 [2021-12-06 21:17:11,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2021-12-06 21:17:14,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:14,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:14,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:17:14,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 42 [2021-12-06 21:17:14,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:14,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:14,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:14,692 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2021-12-06 21:17:14,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 55 [2021-12-06 21:17:15,100 INFO L388 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 8 treesize of output 7 [2021-12-06 21:17:15,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:15,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 28 [2021-12-06 21:17:15,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:17:15,356 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-12-06 21:17:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2021-12-06 21:17:15,570 WARN L220 Elim1Store]: Array PQE input equivalent to false [2021-12-06 21:17:15,692 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-06 21:17:16,594 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:17:16,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 134 [2021-12-06 21:17:17,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 112 [2021-12-06 21:17:22,096 INFO L388 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 [2021-12-06 21:18:05,734 INFO L354 Elim1Store]: treesize reduction 53, result has 18.5 percent of original size [2021-12-06 21:18:05,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 157 treesize of output 115 [2021-12-06 21:18:05,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:18:05,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:18:05,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:18:05,867 INFO L354 Elim1Store]: treesize reduction 41, result has 22.6 percent of original size [2021-12-06 21:18:05,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 5 case distinctions, treesize of input 89 treesize of output 59 [2021-12-06 21:18:11,615 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 4 not checked. [2021-12-06 21:18:11,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:18:13,895 INFO L354 Elim1Store]: treesize reduction 47, result has 51.5 percent of original size [2021-12-06 21:18:13,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 178 treesize of output 203 [2021-12-06 21:18:16,735 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:18:16,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1294557524] [2021-12-06 21:18:16,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1294557524] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:18:16,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1307185782] [2021-12-06 21:18:16,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:18:16,736 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:18:16,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:18:16,737 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:18:16,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-12-06 21:18:17,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:18:17,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 119 conjunts are in the unsatisfiable core [2021-12-06 21:18:17,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:18:17,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 16 [2021-12-06 21:18:33,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:18:33,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:18:36,767 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:18:36,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:18:36,839 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:18:36,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 21:18:37,682 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:18:37,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 3 [2021-12-06 21:18:37,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:18:37,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 21:18:41,651 INFO L388 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 [2021-12-06 21:19:08,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,170 INFO L354 Elim1Store]: treesize reduction 26, result has 16.1 percent of original size [2021-12-06 21:19:08,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 36 [2021-12-06 21:19:08,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:08,335 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-06 21:19:08,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 33 treesize of output 43 [2021-12-06 21:19:08,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 26 [2021-12-06 21:19:08,372 INFO L388 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 10 treesize of output 9 [2021-12-06 21:19:08,392 INFO L388 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 12 treesize of output 11 [2021-12-06 21:19:08,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 20 [2021-12-06 21:19:08,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 15 [2021-12-06 21:19:13,812 INFO L354 Elim1Store]: treesize reduction 56, result has 21.1 percent of original size [2021-12-06 21:19:13,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 89 [2021-12-06 21:19:13,946 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-12-06 21:19:13,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 123 treesize of output 108 [2021-12-06 21:19:15,375 INFO L354 Elim1Store]: treesize reduction 33, result has 19.5 percent of original size [2021-12-06 21:19:15,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 72 [2021-12-06 21:19:15,422 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-12-06 21:19:15,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 79 treesize of output 51 [2021-12-06 21:19:15,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2021-12-06 21:19:31,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:31,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:31,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:32,330 INFO L354 Elim1Store]: treesize reduction 114, result has 27.8 percent of original size [2021-12-06 21:19:32,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 126 treesize of output 148 [2021-12-06 21:19:32,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:32,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:32,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:19:32,670 INFO L354 Elim1Store]: treesize reduction 74, result has 35.1 percent of original size [2021-12-06 21:19:32,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 112 treesize of output 133 [2021-12-06 21:19:32,722 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-06 21:19:32,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 79 [2021-12-06 21:19:33,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:19:33,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 33 [2021-12-06 21:19:33,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-12-06 21:19:33,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 28 [2021-12-06 21:19:34,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 114 treesize of output 106 [2021-12-06 21:19:49,798 INFO L388 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 [2021-12-06 21:20:21,847 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-12-06 21:20:21,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-12-06 21:20:29,676 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-12-06 21:20:29,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 45 [2021-12-06 21:20:29,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:20:29,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:20:29,751 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-12-06 21:20:29,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 22 [2021-12-06 21:20:30,624 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 13 proven. 22 refuted. 1 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:20:30,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:20:33,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:20:33,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 47 [2021-12-06 21:20:36,319 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1307185782] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:20:36,320 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:20:36,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 37] total 68 [2021-12-06 21:20:36,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076970511] [2021-12-06 21:20:36,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:20:36,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-12-06 21:20:36,320 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:20:36,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-12-06 21:20:36,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=6885, Unknown=93, NotChecked=168, Total=7482 [2021-12-06 21:20:36,323 INFO L87 Difference]: Start difference. First operand 356 states and 428 transitions. Second operand has 68 states, 65 states have (on average 1.8615384615384616) internal successors, (121), 62 states have internal predecessors, (121), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:21:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:21:14,372 INFO L93 Difference]: Finished difference Result 353 states and 423 transitions. [2021-12-06 21:21:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-06 21:21:14,374 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 65 states have (on average 1.8615384615384616) internal successors, (121), 62 states have internal predecessors, (121), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 68 [2021-12-06 21:21:14,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:21:14,375 INFO L225 Difference]: With dead ends: 353 [2021-12-06 21:21:14,375 INFO L226 Difference]: Without dead ends: 353 [2021-12-06 21:21:14,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 106 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3855 ImplicationChecksByTransitivity, 124.1s TimeCoverageRelationStatistics Valid=519, Invalid=10708, Unknown=119, NotChecked=210, Total=11556 [2021-12-06 21:21:14,377 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 19 mSDsluCounter, 3701 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 3893 SdHoareTripleChecker+Invalid, 1964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1750 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-06 21:21:14,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 3893 Invalid, 1964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 1750 Unchecked, 1.2s Time] [2021-12-06 21:21:14,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-12-06 21:21:14,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 350. [2021-12-06 21:21:14,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 258 states have (on average 1.445736434108527) internal successors, (373), 321 states have internal predecessors, (373), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:21:14,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 417 transitions. [2021-12-06 21:21:14,383 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 417 transitions. Word has length 68 [2021-12-06 21:21:14,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:21:14,383 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 417 transitions. [2021-12-06 21:21:14,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 65 states have (on average 1.8615384615384616) internal successors, (121), 62 states have internal predecessors, (121), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-06 21:21:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 417 transitions. [2021-12-06 21:21:14,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-12-06 21:21:14,384 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:21:14,384 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:21:14,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (40)] Forceful destruction successful, exit code 0 [2021-12-06 21:21:14,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (39)] Ended with exit code 0 [2021-12-06 21:21:14,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:21:14,785 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:21:14,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:21:14,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1005784712, now seen corresponding path program 1 times [2021-12-06 21:21:14,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:21:14,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [64202896] [2021-12-06 21:21:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:14,787 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:21:14,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:21:14,788 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:21:14,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-12-06 21:21:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:15,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 21:21:15,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:15,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:15,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:15,862 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:21:15,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-12-06 21:21:16,165 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:21:16,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:21:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 49 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-06 21:21:16,390 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:16,942 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:21:16,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [64202896] [2021-12-06 21:21:16,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [64202896] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:16,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [992788430] [2021-12-06 21:21:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:16,943 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:21:16,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:21:16,944 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:21:16,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-12-06 21:21:17,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:17,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-06 21:21:17,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:18,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:18,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:19,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:19,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-06 21:21:19,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:20,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [992788430] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:20,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:21:20,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-12-06 21:21:20,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141303696] [2021-12-06 21:21:20,182 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:21:20,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:21:20,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:21:20,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:21:20,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:21:20,183 INFO L87 Difference]: Start difference. First operand 350 states and 417 transitions. Second operand has 18 states, 17 states have (on average 5.235294117647059) internal successors, (89), 14 states have internal predecessors, (89), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:21:24,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:21:24,597 INFO L93 Difference]: Finished difference Result 350 states and 418 transitions. [2021-12-06 21:21:24,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-06 21:21:24,598 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.235294117647059) internal successors, (89), 14 states have internal predecessors, (89), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 69 [2021-12-06 21:21:24,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:21:24,600 INFO L225 Difference]: With dead ends: 350 [2021-12-06 21:21:24,600 INFO L226 Difference]: Without dead ends: 350 [2021-12-06 21:21:24,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=121, Invalid=580, Unknown=1, NotChecked=0, Total=702 [2021-12-06 21:21:24,601 INFO L933 BasicCegarLoop]: 186 mSDtfsCounter, 108 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 502 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-06 21:21:24,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 999 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 469 Invalid, 0 Unknown, 502 Unchecked, 1.8s Time] [2021-12-06 21:21:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2021-12-06 21:21:24,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 349. [2021-12-06 21:21:24,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 258 states have (on average 1.441860465116279) internal successors, (372), 320 states have internal predecessors, (372), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:21:24,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 416 transitions. [2021-12-06 21:21:24,607 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 416 transitions. Word has length 69 [2021-12-06 21:21:24,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:21:24,608 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 416 transitions. [2021-12-06 21:21:24,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.235294117647059) internal successors, (89), 14 states have internal predecessors, (89), 6 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:21:24,608 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 416 transitions. [2021-12-06 21:21:24,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 21:21:24,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:21:24,609 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:21:24,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (42)] Ended with exit code 0 [2021-12-06 21:21:24,846 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (41)] Ended with exit code 0 [2021-12-06 21:21:25,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:21:25,010 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:21:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:21:25,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1114554813, now seen corresponding path program 1 times [2021-12-06 21:21:25,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:21:25,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1717045025] [2021-12-06 21:21:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:25,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:21:25,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:21:25,014 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:21:25,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-12-06 21:21:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:25,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 21:21:25,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:25,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 42 [2021-12-06 21:21:25,635 INFO L388 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 [2021-12-06 21:21:25,839 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:21:26,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:26,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2021-12-06 21:21:26,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-12-06 21:21:26,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:26,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 21:21:27,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 21:21:27,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:27,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 21:21:27,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 21:21:27,737 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 23 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-06 21:21:27,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:28,060 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:21:28,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1717045025] [2021-12-06 21:21:28,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1717045025] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:28,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1808661764] [2021-12-06 21:21:28,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:28,061 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:21:28,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:21:28,062 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:21:28,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-12-06 21:21:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:28,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-06 21:21:28,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:28,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 21:21:28,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 111 [2021-12-06 21:21:29,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:21:29,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:29,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-06 21:21:29,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 9 [2021-12-06 21:21:30,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:30,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-12-06 21:21:30,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-12-06 21:21:30,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:30,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 21:21:30,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 19 [2021-12-06 21:21:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-06 21:21:30,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:31,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1808661764] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:31,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:21:31,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-12-06 21:21:31,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425986000] [2021-12-06 21:21:31,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:21:31,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-06 21:21:31,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:21:31,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-06 21:21:31,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-12-06 21:21:31,125 INFO L87 Difference]: Start difference. First operand 349 states and 416 transitions. Second operand has 13 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 21:21:32,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:21:32,477 INFO L93 Difference]: Finished difference Result 352 states and 420 transitions. [2021-12-06 21:21:32,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-06 21:21:32,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 70 [2021-12-06 21:21:32,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:21:32,480 INFO L225 Difference]: With dead ends: 352 [2021-12-06 21:21:32,480 INFO L226 Difference]: Without dead ends: 352 [2021-12-06 21:21:32,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 132 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-12-06 21:21:32,480 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 30 mSDsluCounter, 794 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 984 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-06 21:21:32,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 984 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 278 Invalid, 0 Unknown, 96 Unchecked, 1.0s Time] [2021-12-06 21:21:32,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-12-06 21:21:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2021-12-06 21:21:32,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 258 states have (on average 1.437984496124031) internal successors, (371), 319 states have internal predecessors, (371), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:21:32,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 415 transitions. [2021-12-06 21:21:32,487 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 415 transitions. Word has length 70 [2021-12-06 21:21:32,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:21:32,487 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 415 transitions. [2021-12-06 21:21:32,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-06 21:21:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 415 transitions. [2021-12-06 21:21:32,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 21:21:32,488 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:21:32,488 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:21:32,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (43)] Ended with exit code 0 [2021-12-06 21:21:32,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (44)] Ended with exit code 0 [2021-12-06 21:21:32,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:21:32,890 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:21:32,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:21:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1114554812, now seen corresponding path program 1 times [2021-12-06 21:21:32,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:21:32,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1686153426] [2021-12-06 21:21:32,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:32,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:21:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:21:32,895 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:21:32,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Waiting until timeout for monitored process [2021-12-06 21:21:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:33,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 21:21:33,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:33,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:33,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-12-06 21:21:36,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:36,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:36,266 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:21:36,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-12-06 21:21:36,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:38,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:38,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:39,275 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-06 21:21:39,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2021-12-06 21:21:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 25 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 21:21:39,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:40,199 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:21:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1686153426] [2021-12-06 21:21:40,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1686153426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:40,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [497132966] [2021-12-06 21:21:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:40,199 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:21:40,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:21:40,200 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:21:40,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Waiting until timeout for monitored process [2021-12-06 21:21:40,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:41,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-06 21:21:41,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:41,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:41,095 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-06 21:21:41,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 23 [2021-12-06 21:21:41,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 46 [2021-12-06 21:21:41,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:41,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:41,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:21:41,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:44,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:44,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:21:44,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:45,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:45,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:21:45,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-12-06 21:21:45,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-06 21:21:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-06 21:21:45,740 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:21:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [497132966] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:21:46,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:21:46,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 17 [2021-12-06 21:21:46,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681686205] [2021-12-06 21:21:46,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:21:46,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 21:21:46,188 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:21:46,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 21:21:46,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=335, Unknown=3, NotChecked=0, Total=420 [2021-12-06 21:21:46,189 INFO L87 Difference]: Start difference. First operand 348 states and 415 transitions. Second operand has 18 states, 16 states have (on average 5.0) internal successors, (80), 14 states have internal predecessors, (80), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:21:51,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:21:51,637 INFO L93 Difference]: Finished difference Result 349 states and 417 transitions. [2021-12-06 21:21:51,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 21:21:51,638 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 5.0) internal successors, (80), 14 states have internal predecessors, (80), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2021-12-06 21:21:51,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:21:51,640 INFO L225 Difference]: With dead ends: 349 [2021-12-06 21:21:51,640 INFO L226 Difference]: Without dead ends: 349 [2021-12-06 21:21:51,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 136 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=153, Invalid=599, Unknown=4, NotChecked=0, Total=756 [2021-12-06 21:21:51,641 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 85 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 506 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:21:51,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 1064 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 574 Invalid, 0 Unknown, 506 Unchecked, 2.1s Time] [2021-12-06 21:21:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-06 21:21:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-12-06 21:21:51,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 258 states have (on average 1.434108527131783) internal successors, (370), 318 states have internal predecessors, (370), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:21:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 414 transitions. [2021-12-06 21:21:51,648 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 414 transitions. Word has length 70 [2021-12-06 21:21:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:21:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 414 transitions. [2021-12-06 21:21:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 5.0) internal successors, (80), 14 states have internal predecessors, (80), 6 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:21:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 414 transitions. [2021-12-06 21:21:51,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 21:21:51,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:21:51,651 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:21:51,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (46)] Ended with exit code 0 [2021-12-06 21:21:51,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (45)] Forceful destruction successful, exit code 0 [2021-12-06 21:21:52,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:21:52,053 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr16REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:21:52,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:21:52,054 INFO L85 PathProgramCache]: Analyzing trace with hash 727096554, now seen corresponding path program 1 times [2021-12-06 21:21:52,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:21:52,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [941173116] [2021-12-06 21:21:52,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:52,056 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:21:52,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:21:52,058 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:21:52,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Waiting until timeout for monitored process [2021-12-06 21:21:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:52,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 21:21:52,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:52,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-06 21:21:52,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-06 21:21:52,554 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 21:21:52,554 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:21:52,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [941173116] [2021-12-06 21:21:52,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [941173116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 21:21:52,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 21:21:52,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-06 21:21:52,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865161810] [2021-12-06 21:21:52,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 21:21:52,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-06 21:21:52,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:21:52,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-06 21:21:52,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-06 21:21:52,555 INFO L87 Difference]: Start difference. First operand 347 states and 414 transitions. Second operand has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:21:54,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:21:54,578 INFO L93 Difference]: Finished difference Result 464 states and 568 transitions. [2021-12-06 21:21:54,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-06 21:21:54,579 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 70 [2021-12-06 21:21:54,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:21:54,581 INFO L225 Difference]: With dead ends: 464 [2021-12-06 21:21:54,581 INFO L226 Difference]: Without dead ends: 464 [2021-12-06 21:21:54,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-12-06 21:21:54,582 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 107 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 908 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-06 21:21:54,582 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 908 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-06 21:21:54,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-12-06 21:21:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 346. [2021-12-06 21:21:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 258 states have (on average 1.426356589147287) internal successors, (368), 317 states have internal predecessors, (368), 26 states have call successors, (26), 11 states have call predecessors, (26), 10 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-12-06 21:21:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 412 transitions. [2021-12-06 21:21:54,588 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 412 transitions. Word has length 70 [2021-12-06 21:21:54,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:21:54,589 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 412 transitions. [2021-12-06 21:21:54,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.666666666666667) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-06 21:21:54,589 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 412 transitions. [2021-12-06 21:21:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-06 21:21:54,589 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:21:54,590 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:21:54,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (47)] Ended with exit code 0 [2021-12-06 21:21:54,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-06 21:21:54,791 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATION === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:21:54,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:21:54,792 INFO L85 PathProgramCache]: Analyzing trace with hash 727096555, now seen corresponding path program 1 times [2021-12-06 21:21:54,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:21:54,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [199029976] [2021-12-06 21:21:54,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:21:54,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:21:54,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:21:54,796 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:21:54,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Waiting until timeout for monitored process [2021-12-06 21:21:55,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:21:55,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 66 conjunts are in the unsatisfiable core [2021-12-06 21:21:55,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:21:55,348 INFO L388 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 [2021-12-06 21:21:55,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:21:55,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:21:56,058 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:21:56,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:21:56,115 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-12-06 21:21:56,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 20 [2021-12-06 21:21:57,432 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| (_ BitVec 32)) (v_ArrVal_4549 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4548 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4547 (Array (_ BitVec 32) (_ BitVec 32))) (v_ArrVal_4550 (Array (_ BitVec 32) (_ BitVec 32)))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |chain_node_~node~0#1.base|))) (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_4548) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4550) |c_#memory_$Pointer$.base|) (= |c_#length| (store |c_old(#length)| |chain_node_~node~0#1.base| (_ bv8 32))) (= (store (store |c_old(#memory_$Pointer$.offset)| |chain_node_~node~0#1.base| v_ArrVal_4547) |c_chain_node_#in~ppnode#1.base| v_ArrVal_4549) |c_#memory_$Pointer$.offset|))) is different from true [2021-12-06 21:21:57,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:57,653 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:21:57,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 46 [2021-12-06 21:21:57,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:21:57,816 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:21:57,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2021-12-06 21:21:57,856 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:21:57,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:21:57,909 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-06 21:21:57,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:21:57,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-12-06 21:21:58,006 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:21:58,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 9 [2021-12-06 21:21:58,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2021-12-06 21:21:58,277 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:21:58,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 7 [2021-12-06 21:21:58,805 INFO L388 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 [2021-12-06 21:21:59,721 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:21:59,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:22:10,292 INFO L354 Elim1Store]: treesize reduction 16, result has 75.4 percent of original size [2021-12-06 21:22:10,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 68 [2021-12-06 21:22:10,321 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-12-06 21:22:10,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-06 21:22:10,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-12-06 21:22:10,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:22:11,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2021-12-06 21:22:12,530 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-06 21:22:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [199029976] [2021-12-06 21:22:12,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [199029976] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:22:12,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [255949241] [2021-12-06 21:22:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:22:12,531 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-06 21:22:12,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 [2021-12-06 21:22:12,531 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-06 21:22:12,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (49)] Waiting until timeout for monitored process [2021-12-06 21:22:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:22:13,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 72 conjunts are in the unsatisfiable core [2021-12-06 21:22:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:22:13,837 INFO L388 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 [2021-12-06 21:22:13,850 INFO L388 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 [2021-12-06 21:22:14,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:22:14,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-06 21:22:16,108 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:22:16,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 32 [2021-12-06 21:22:16,180 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-06 21:22:16,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 18 [2021-12-06 21:22:17,284 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:22:17,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 7 [2021-12-06 21:22:17,294 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-06 21:22:17,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 24 [2021-12-06 21:22:20,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:22:20,405 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:22:20,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 62 [2021-12-06 21:22:20,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:22:20,627 INFO L354 Elim1Store]: treesize reduction 20, result has 57.4 percent of original size [2021-12-06 21:22:20,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 44 [2021-12-06 21:22:20,680 INFO L354 Elim1Store]: treesize reduction 4, result has 60.0 percent of original size [2021-12-06 21:22:20,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-12-06 21:22:20,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-06 21:22:20,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-06 21:22:20,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2021-12-06 21:22:22,419 INFO L388 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 [2021-12-06 21:22:55,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 39 [2021-12-06 21:22:55,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 70 treesize of output 50 [2021-12-06 21:22:55,773 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-06 21:22:55,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-06 21:22:56,083 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 24 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 21:22:56,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 21:23:00,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 30 [2021-12-06 21:23:02,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [255949241] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 21:23:02,725 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 21:23:02,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 45 [2021-12-06 21:23:02,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258410437] [2021-12-06 21:23:02,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 21:23:02,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-06 21:23:02,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-06 21:23:02,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-06 21:23:02,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=2849, Unknown=23, NotChecked=108, Total=3192 [2021-12-06 21:23:02,726 INFO L87 Difference]: Start difference. First operand 346 states and 412 transitions. Second operand has 46 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 6 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:24:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 21:24:13,645 INFO L93 Difference]: Finished difference Result 372 states and 439 transitions. [2021-12-06 21:24:13,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-12-06 21:24:13,646 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 6 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2021-12-06 21:24:13,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 21:24:13,648 INFO L225 Difference]: With dead ends: 372 [2021-12-06 21:24:13,648 INFO L226 Difference]: Without dead ends: 372 [2021-12-06 21:24:13,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 125 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1632 ImplicationChecksByTransitivity, 100.1s TimeCoverageRelationStatistics Valid=428, Invalid=5823, Unknown=73, NotChecked=156, Total=6480 [2021-12-06 21:24:13,649 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 79 mSDsluCounter, 2654 mSDsCounter, 0 mSdLazyCounter, 1738 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 2841 SdHoareTripleChecker+Invalid, 3567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1803 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-12-06 21:24:13,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 2841 Invalid, 3567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1738 Invalid, 0 Unknown, 1803 Unchecked, 6.1s Time] [2021-12-06 21:24:13,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-06 21:24:13,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 351. [2021-12-06 21:24:13,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 262 states have (on average 1.4198473282442747) internal successors, (372), 321 states have internal predecessors, (372), 26 states have call successors, (26), 11 states have call predecessors, (26), 11 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2021-12-06 21:24:13,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 417 transitions. [2021-12-06 21:24:13,655 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 417 transitions. Word has length 70 [2021-12-06 21:24:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 21:24:13,655 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 417 transitions. [2021-12-06 21:24:13,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7111111111111112) internal successors, (122), 43 states have internal predecessors, (122), 6 states have call successors, (8), 6 states have call predecessors, (8), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-06 21:24:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 417 transitions. [2021-12-06 21:24:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-06 21:24:13,656 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 21:24:13,656 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 21:24:13,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (48)] Ended with exit code 0 [2021-12-06 21:24:13,871 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt (49)] Ended with exit code 0 [2021-12-06 21:24:14,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/cvc4 --incremental --print-success --lang smt [2021-12-06 21:24:14,057 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting failErr0ASSERT_VIOLATIONMEMORY_LEAK === [failErr0ASSERT_VIOLATIONMEMORY_LEAK, check_seq_nextErr0REQUIRES_VIOLATION, check_seq_nextErr1REQUIRES_VIOLATION, check_seq_nextErr2REQUIRES_VIOLATION (and 79 more)] === [2021-12-06 21:24:14,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 21:24:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1413605713, now seen corresponding path program 1 times [2021-12-06 21:24:14,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-06 21:24:14,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1641919220] [2021-12-06 21:24:14,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 21:24:14,061 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-06 21:24:14,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat [2021-12-06 21:24:14,063 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-06 21:24:14,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f0c6431-c093-4d51-aaf4-10d4c84584a8/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (50)] Waiting until timeout for monitored process [2021-12-06 21:24:14,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 21:24:14,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 104 conjunts are in the unsatisfiable core [2021-12-06 21:24:14,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 21:24:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:24:14,712 INFO L354 Elim1Store]: treesize reduction 20, result has 48.7 percent of original size [2021-12-06 21:24:14,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 12 treesize of output 24 [2021-12-06 21:24:14,728 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 18 [2021-12-06 21:24:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:24:15,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:24:15,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-06 21:24:15,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2021-12-06 21:24:15,722 INFO L388 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 [2021-12-06 21:24:16,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:24:16,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-06 21:24:16,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 21:24:16,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-06 21:24:16,955 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-12-06 21:24:16,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 26 [2021-12-06 21:24:17,019 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-12-06 21:24:17,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-12-06 21:24:17,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 21:24:17,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22