./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:52:31,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:52:31,821 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:52:31,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:52:31,864 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:52:31,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:52:31,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:52:31,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:52:31,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:52:31,887 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:52:31,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:52:31,891 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:52:31,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:52:31,895 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:52:31,898 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:52:31,908 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:52:31,910 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:52:31,911 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:52:31,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:52:31,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:52:31,926 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:52:31,928 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:52:31,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:52:31,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:52:31,946 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:52:31,947 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:52:31,948 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:52:31,949 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:52:31,951 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:52:31,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:52:31,954 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:52:31,955 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:52:31,958 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:52:31,959 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:52:31,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:52:31,962 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:52:31,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:52:31,963 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:52:31,963 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:52:31,964 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:52:31,965 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:52:31,966 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-28 08:52:32,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:52:32,022 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:52:32,022 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:52:32,023 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:52:32,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:52:32,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:52:32,031 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:52:32,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:52:32,032 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:52:32,032 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:52:32,033 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:52:32,033 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:52:32,034 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:52:32,034 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:52:32,034 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:52:32,034 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:52:32,034 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:52:32,035 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:52:32,035 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:52:32,035 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:52:32,035 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:52:32,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:52:32,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:52:32,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:32,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:52:32,037 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:52:32,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 08:52:32,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 08:52:32,037 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:52:32,039 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-28 08:52:32,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:52:32,355 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:52:32,359 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:52:32,361 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:52:32,362 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:52:32,363 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-28 08:52:32,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/72107ccc8/ce4b080f4549434982a418dfa64de32e/FLAGe97d343b1 [2021-10-28 08:52:33,061 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:52:33,064 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-28 08:52:33,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/72107ccc8/ce4b080f4549434982a418dfa64de32e/FLAGe97d343b1 [2021-10-28 08:52:33,341 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/72107ccc8/ce4b080f4549434982a418dfa64de32e [2021-10-28 08:52:33,345 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:52:33,347 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:52:33,358 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:33,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:52:33,362 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:52:33,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:33,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@385e8bff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33, skipping insertion in model container [2021-10-28 08:52:33,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:33,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:52:33,414 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:52:33,830 WARN L228 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-28 08:52:33,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:33,843 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:52:33,892 WARN L228 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-28 08:52:33,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:33,936 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:52:33,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33 WrapperNode [2021-10-28 08:52:33,937 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:33,940 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:52:33,942 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:52:33,942 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:52:33,956 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:33,957 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:33,993 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:33,997 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:34,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:34,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:34,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:34,067 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:52:34,068 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:52:34,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:52:34,069 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:52:34,077 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (1/1) ... [2021-10-28 08:52:34,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:34,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:34,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:52:34,134 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:52:34,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:52:34,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:52:34,177 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:52:34,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:52:34,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:52:34,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:52:34,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:52:34,181 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:52:34,181 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:52:34,182 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:52:34,183 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:52:34,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:52:34,183 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:52:34,184 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:52:34,184 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:52:34,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:52:34,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:52:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:52:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:52:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:52:34,185 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:52:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:52:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:52:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:52:34,186 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:52:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:52:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:52:34,187 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:52:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:52:34,188 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:52:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:52:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:52:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:52:34,189 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:52:34,190 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:52:34,190 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:52:34,190 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:52:34,190 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:52:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:52:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:52:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:52:34,191 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:52:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:52:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:52:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:52:34,192 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:52:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:52:34,193 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:52:34,194 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:52:34,195 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:52:34,195 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:52:34,195 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:52:34,196 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:52:34,196 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:52:34,196 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:52:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:52:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:52:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:52:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:52:34,197 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:52:34,198 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:52:34,198 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:52:34,198 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:52:34,198 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:52:34,199 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:52:34,199 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:52:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:52:34,201 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:52:34,202 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:52:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:52:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:52:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:52:34,203 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:52:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:52:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:52:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:52:34,204 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:52:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:52:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:52:34,205 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:52:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:52:34,206 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:52:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:52:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:52:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:52:34,207 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:52:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:52:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:52:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:52:34,208 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:52:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:52:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:52:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:52:34,209 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:52:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:52:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:52:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:52:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:52:34,210 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:52:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:52:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:52:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:52:34,211 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:52:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:52:34,212 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:52:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:52:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:52:34,213 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:52:34,214 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:52:34,215 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:52:34,215 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:52:34,215 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:52:34,215 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:52:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:52:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:52:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:52:34,216 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:52:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:52:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:52:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:52:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:52:34,217 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:52:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:52:34,218 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:52:34,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:52:34,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:52:34,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 08:52:34,221 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:52:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 08:52:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:52:34,224 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:52:34,225 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 08:52:34,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:52:34,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:52:34,600 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:52:34,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:52:34,732 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:52:34,734 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:34 BoogieIcfgContainer [2021-10-28 08:52:34,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:52:34,737 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:52:34,737 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:52:34,742 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:52:34,742 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:52:33" (1/3) ... [2021-10-28 08:52:34,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d8e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:34, skipping insertion in model container [2021-10-28 08:52:34,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:33" (2/3) ... [2021-10-28 08:52:34,744 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@393d8e1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:34, skipping insertion in model container [2021-10-28 08:52:34,744 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:34" (3/3) ... [2021-10-28 08:52:34,746 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-28 08:52:34,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:52:34,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-28 08:52:34,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:52:34,815 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 [2021-10-28 08:52:34,816 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-28 08:52:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:52:34,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:52:34,843 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:34,844 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:34,845 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:34,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:34,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1752578520, now seen corresponding path program 1 times [2021-10-28 08:52:34,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:34,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994356571] [2021-10-28 08:52:34,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:34,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:35,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:35,190 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994356571] [2021-10-28 08:52:35,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994356571] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:35,191 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:35,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:52:35,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568607364] [2021-10-28 08:52:35,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:52:35,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:52:35,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:35,264 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 29 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 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) [2021-10-28 08:52:35,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:35,435 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-10-28 08:52:35,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:52:35,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 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 9 [2021-10-28 08:52:35,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:35,447 INFO L225 Difference]: With dead ends: 50 [2021-10-28 08:52:35,448 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 08:52:35,450 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 08:52:35,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-10-28 08:52:35,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 32 states have internal predecessors, (40), 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) [2021-10-28 08:52:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-10-28 08:52:35,490 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2021-10-28 08:52:35,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:35,490 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-10-28 08:52:35,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 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) [2021-10-28 08:52:35,491 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-10-28 08:52:35,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:52:35,492 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:35,492 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:35,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 08:52:35,493 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:35,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:35,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1503990498, now seen corresponding path program 1 times [2021-10-28 08:52:35,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:35,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884591827] [2021-10-28 08:52:35,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:35,496 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:35,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:35,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884591827] [2021-10-28 08:52:35,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884591827] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:35,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:35,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:52:35,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608223154] [2021-10-28 08:52:35,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:35,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:35,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:35,646 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:35,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:35,771 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 08:52:35,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:52:35,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 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 10 [2021-10-28 08:52:35,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:35,776 INFO L225 Difference]: With dead ends: 40 [2021-10-28 08:52:35,776 INFO L226 Difference]: Without dead ends: 39 [2021-10-28 08:52:35,777 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:35,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-28 08:52:35,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-10-28 08:52:35,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 27 states have internal predecessors, (29), 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) [2021-10-28 08:52:35,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-10-28 08:52:35,789 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 10 [2021-10-28 08:52:35,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:35,789 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-10-28 08:52:35,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:35,790 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-10-28 08:52:35,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:52:35,791 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:35,791 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:35,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 08:52:35,792 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:35,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1503991813, now seen corresponding path program 1 times [2021-10-28 08:52:35,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:35,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080492311] [2021-10-28 08:52:35,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:35,795 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:35,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:35,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:35,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080492311] [2021-10-28 08:52:35,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080492311] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:35,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:52:35,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78988874] [2021-10-28 08:52:35,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:35,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:35,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:35,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:35,928 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:36,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:36,021 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-28 08:52:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:52:36,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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 10 [2021-10-28 08:52:36,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:36,027 INFO L225 Difference]: With dead ends: 29 [2021-10-28 08:52:36,028 INFO L226 Difference]: Without dead ends: 29 [2021-10-28 08:52:36,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-28 08:52:36,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-28 08:52:36,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.5) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-10-28 08:52:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-28 08:52:36,038 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2021-10-28 08:52:36,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:36,039 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-28 08:52:36,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:36,040 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-28 08:52:36,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-28 08:52:36,041 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:36,041 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:36,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 08:52:36,042 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:36,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1503991814, now seen corresponding path program 1 times [2021-10-28 08:52:36,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:36,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937280968] [2021-10-28 08:52:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:36,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:36,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:36,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937280968] [2021-10-28 08:52:36,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937280968] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:36,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:36,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 08:52:36,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114911813] [2021-10-28 08:52:36,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:36,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:36,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:36,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:36,215 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:36,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:36,283 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-28 08:52:36,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:52:36,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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 10 [2021-10-28 08:52:36,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:36,285 INFO L225 Difference]: With dead ends: 27 [2021-10-28 08:52:36,285 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 08:52:36,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:36,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 08:52:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 08:52:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-28 08:52:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 08:52:36,305 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2021-10-28 08:52:36,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:36,306 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 08:52:36,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 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) [2021-10-28 08:52:36,306 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 08:52:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:52:36,308 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:36,308 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:36,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 08:52:36,309 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:36,311 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629249, now seen corresponding path program 1 times [2021-10-28 08:52:36,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:36,312 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563039540] [2021-10-28 08:52:36,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:36,312 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:36,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:36,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:36,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563039540] [2021-10-28 08:52:36,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563039540] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:36,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:36,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-28 08:52:36,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672400014] [2021-10-28 08:52:36,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:52:36,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:36,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:52:36,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:36,451 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:36,544 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-10-28 08:52:36,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:52:36,545 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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 16 [2021-10-28 08:52:36,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:36,558 INFO L225 Difference]: With dead ends: 42 [2021-10-28 08:52:36,559 INFO L226 Difference]: Without dead ends: 42 [2021-10-28 08:52:36,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:52:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-28 08:52:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-10-28 08:52:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.368421052631579) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-10-28 08:52:36,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 08:52:36,565 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-28 08:52:36,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:36,566 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 08:52:36,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,566 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 08:52:36,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:52:36,567 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:36,567 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:36,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-28 08:52:36,568 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:36,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:36,569 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629292, now seen corresponding path program 1 times [2021-10-28 08:52:36,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:36,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832025464] [2021-10-28 08:52:36,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:36,570 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:36,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:36,657 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:36,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832025464] [2021-10-28 08:52:36,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832025464] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:36,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:36,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:52:36,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146307936] [2021-10-28 08:52:36,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:52:36,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:36,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:52:36,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:36,661 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:36,751 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-10-28 08:52:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:52:36,752 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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 16 [2021-10-28 08:52:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:36,753 INFO L225 Difference]: With dead ends: 33 [2021-10-28 08:52:36,753 INFO L226 Difference]: Without dead ends: 33 [2021-10-28 08:52:36,754 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:52:36,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-28 08:52:36,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-10-28 08:52:36,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-10-28 08:52:36,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 08:52:36,758 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-10-28 08:52:36,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:36,759 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 08:52:36,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,759 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-28 08:52:36,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:52:36,760 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:36,761 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:36,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-28 08:52:36,761 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:36,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:36,762 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629293, now seen corresponding path program 1 times [2021-10-28 08:52:36,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:36,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068802314] [2021-10-28 08:52:36,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:36,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:36,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:36,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068802314] [2021-10-28 08:52:36,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068802314] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:36,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:36,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-28 08:52:36,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339292248] [2021-10-28 08:52:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:52:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:36,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:52:36,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:36,859 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:36,951 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-10-28 08:52:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:52:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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 16 [2021-10-28 08:52:36,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:36,953 INFO L225 Difference]: With dead ends: 37 [2021-10-28 08:52:36,954 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 08:52:36,954 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:52:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 08:52:36,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-10-28 08:52:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 26 states have internal predecessors, (29), 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) [2021-10-28 08:52:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-28 08:52:36,958 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-10-28 08:52:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:36,959 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-28 08:52:36,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 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) [2021-10-28 08:52:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-28 08:52:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-28 08:52:36,960 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:36,961 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:36,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-28 08:52:36,961 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:36,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:36,962 INFO L85 PathProgramCache]: Analyzing trace with hash -2029074739, now seen corresponding path program 1 times [2021-10-28 08:52:36,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:36,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795628367] [2021-10-28 08:52:36,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:36,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:37,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-28 08:52:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:37,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 08:52:37,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795628367] [2021-10-28 08:52:37,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795628367] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:37,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:37,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-28 08:52:37,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147919503] [2021-10-28 08:52:37,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:52:37,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 08:52:37,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:52:37,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:52:37,062 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 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) [2021-10-28 08:52:37,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:37,162 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-28 08:52:37,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-28 08:52:37,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 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 18 [2021-10-28 08:52:37,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:37,164 INFO L225 Difference]: With dead ends: 34 [2021-10-28 08:52:37,164 INFO L226 Difference]: Without dead ends: 34 [2021-10-28 08:52:37,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:52:37,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-28 08:52:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-10-28 08:52:37,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 26 states have internal predecessors, (28), 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) [2021-10-28 08:52:37,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-28 08:52:37,168 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-10-28 08:52:37,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:37,169 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-28 08:52:37,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 1 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) [2021-10-28 08:52:37,169 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-28 08:52:37,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-28 08:52:37,170 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:37,171 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:37,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-28 08:52:37,171 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:37,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:37,172 INFO L85 PathProgramCache]: Analyzing trace with hash -790989135, now seen corresponding path program 1 times [2021-10-28 08:52:37,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 08:52:37,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791406243] [2021-10-28 08:52:37,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:37,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 08:52:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:37,191 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:52:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:37,238 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 08:52:37,238 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:52:37,240 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:52:37,242 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:52:37,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:52:37,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 08:52:37,243 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 08:52:37,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 08:52:37,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 08:52:37,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:52:37,244 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 08:52:37,245 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 08:52:37,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-28 08:52:37,249 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:37,253 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:52:37,264 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:52:37,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:52:37 BoogieIcfgContainer [2021-10-28 08:52:37,279 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:52:37,280 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:52:37,280 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:52:37,280 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:52:37,281 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:34" (3/4) ... [2021-10-28 08:52:37,285 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:52:37,285 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:52:37,287 INFO L168 Benchmark]: Toolchain (without parser) took 3939.36 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 63.3 MB in the beginning and 57.9 MB in the end (delta: 5.4 MB). Peak memory consumption was 28.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:37,288 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 81.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:37,288 INFO L168 Benchmark]: CACSL2BoogieTranslator took 581.75 ms. Allocated memory is still 107.0 MB. Free memory was 63.1 MB in the beginning and 75.0 MB in the end (delta: -11.9 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:37,289 INFO L168 Benchmark]: Boogie Preprocessor took 127.02 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 72.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:37,290 INFO L168 Benchmark]: RCFGBuilder took 666.63 ms. Allocated memory is still 107.0 MB. Free memory was 72.5 MB in the beginning and 53.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:37,291 INFO L168 Benchmark]: TraceAbstraction took 2542.19 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 52.8 MB in the beginning and 57.9 MB in the end (delta: -5.0 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:37,291 INFO L168 Benchmark]: Witness Printer took 5.59 ms. Allocated memory is still 130.0 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:37,294 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 107.0 MB. Free memory is still 81.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 581.75 ms. Allocated memory is still 107.0 MB. Free memory was 63.1 MB in the beginning and 75.0 MB in the end (delta: -11.9 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 127.02 ms. Allocated memory is still 107.0 MB. Free memory was 75.0 MB in the beginning and 72.5 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 666.63 ms. Allocated memory is still 107.0 MB. Free memory was 72.5 MB in the beginning and 53.2 MB in the end (delta: 19.3 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2542.19 ms. Allocated memory was 107.0 MB in the beginning and 130.0 MB in the end (delta: 23.1 MB). Free memory was 52.8 MB in the beginning and 57.9 MB in the end (delta: -5.0 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. * Witness Printer took 5.59 ms. Allocated memory is still 130.0 MB. Free memory is still 57.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [p={0:0}, t={-1:0}] [L538] t->n = p VAL [p={0:0}, t={-1:0}] [L539] p = t VAL [p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 54 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 2.4s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 151 SDtfs, 202 SDslu, 103 SDs, 0 SdLazy, 402 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=1, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 126 NumberOfCodeBlocks, 126 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 478 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 08:52:37,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-b2eff8b [2021-10-28 08:52:40,203 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 08:52:40,207 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 08:52:40,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 08:52:40,269 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 08:52:40,273 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 08:52:40,276 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 08:52:40,284 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 08:52:40,288 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 08:52:40,290 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 08:52:40,291 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 08:52:40,293 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 08:52:40,293 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 08:52:40,295 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 08:52:40,296 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 08:52:40,298 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 08:52:40,300 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 08:52:40,301 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 08:52:40,304 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 08:52:40,307 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 08:52:40,309 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 08:52:40,311 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 08:52:40,313 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 08:52:40,314 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 08:52:40,318 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 08:52:40,322 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 08:52:40,323 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 08:52:40,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 08:52:40,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 08:52:40,326 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 08:52:40,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 08:52:40,327 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 08:52:40,329 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 08:52:40,330 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 08:52:40,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 08:52:40,332 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 08:52:40,333 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 08:52:40,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 08:52:40,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 08:52:40,336 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 08:52:40,337 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 08:52:40,338 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-10-28 08:52:40,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 08:52:40,378 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 08:52:40,379 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 08:52:40,379 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 08:52:40,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 08:52:40,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 08:52:40,383 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 08:52:40,383 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 08:52:40,384 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 08:52:40,384 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-28 08:52:40,385 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 08:52:40,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 08:52:40,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 08:52:40,386 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-28 08:52:40,387 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-28 08:52:40,387 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-28 08:52:40,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 08:52:40,388 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-28 08:52:40,388 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-28 08:52:40,388 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-28 08:52:40,389 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 08:52:40,389 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 08:52:40,389 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 08:52:40,390 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 08:52:40,390 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 08:52:40,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:40,391 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 08:52:40,391 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 08:52:40,392 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-10-28 08:52:40,392 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-28 08:52:40,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 08:52:40,392 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-28 08:52:40,393 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-28 08:52:40,889 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 08:52:40,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 08:52:40,920 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 08:52:40,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 08:52:40,927 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 08:52:40,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-28 08:52:41,018 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/d5e8feb09/56bbe9a193e940a2a99fa1cf15bcb0d5/FLAG4ba04e326 [2021-10-28 08:52:41,768 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 08:52:41,769 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-28 08:52:41,788 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/d5e8feb09/56bbe9a193e940a2a99fa1cf15bcb0d5/FLAG4ba04e326 [2021-10-28 08:52:41,998 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/data/d5e8feb09/56bbe9a193e940a2a99fa1cf15bcb0d5 [2021-10-28 08:52:42,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 08:52:42,002 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-28 08:52:42,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:42,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 08:52:42,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 08:52:42,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:41" (1/1) ... [2021-10-28 08:52:42,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ed76e0d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42, skipping insertion in model container [2021-10-28 08:52:42,013 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:52:41" (1/1) ... [2021-10-28 08:52:42,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 08:52:42,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 08:52:42,528 WARN L228 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-28 08:52:42,534 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:42,560 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 08:52:42,626 WARN L228 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_0b6dea35-c195-48d7-9687-7b03104d0bc8/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-28 08:52:42,633 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 08:52:42,678 INFO L208 MainTranslator]: Completed translation [2021-10-28 08:52:42,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42 WrapperNode [2021-10-28 08:52:42,679 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 08:52:42,680 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 08:52:42,681 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 08:52:42,681 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 08:52:42,692 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,692 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,736 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,736 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,761 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,773 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 08:52:42,808 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 08:52:42,808 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 08:52:42,808 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 08:52:42,809 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (1/1) ... [2021-10-28 08:52:42,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 08:52:42,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 08:52:42,847 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 08:52:42,869 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 08:52:42,911 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-28 08:52:42,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 08:52:42,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:52:42,913 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-10-28 08:52:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-10-28 08:52:42,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-10-28 08:52:42,916 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-10-28 08:52:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-10-28 08:52:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-10-28 08:52:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-10-28 08:52:42,917 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-28 08:52:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-10-28 08:52:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-10-28 08:52:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-10-28 08:52:42,918 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-10-28 08:52:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-10-28 08:52:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 08:52:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-10-28 08:52:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-10-28 08:52:42,919 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-10-28 08:52:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-10-28 08:52:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-10-28 08:52:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-10-28 08:52:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-10-28 08:52:42,920 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-10-28 08:52:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-10-28 08:52:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-10-28 08:52:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-10-28 08:52:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-10-28 08:52:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-10-28 08:52:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-10-28 08:52:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-10-28 08:52:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-10-28 08:52:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-10-28 08:52:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-10-28 08:52:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-10-28 08:52:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-10-28 08:52:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-10-28 08:52:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-10-28 08:52:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-10-28 08:52:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-10-28 08:52:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-10-28 08:52:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-10-28 08:52:42,924 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-10-28 08:52:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-10-28 08:52:42,925 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-10-28 08:52:42,926 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-10-28 08:52:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-10-28 08:52:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-10-28 08:52:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-10-28 08:52:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-10-28 08:52:42,927 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-10-28 08:52:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-10-28 08:52:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-10-28 08:52:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-10-28 08:52:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-10-28 08:52:42,928 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-10-28 08:52:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-10-28 08:52:42,929 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-10-28 08:52:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-10-28 08:52:42,930 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-10-28 08:52:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-10-28 08:52:42,931 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-10-28 08:52:42,932 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-10-28 08:52:42,933 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-10-28 08:52:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-10-28 08:52:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-10-28 08:52:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-10-28 08:52:42,934 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-10-28 08:52:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-10-28 08:52:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-10-28 08:52:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-10-28 08:52:42,935 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-10-28 08:52:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-28 08:52:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-10-28 08:52:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-10-28 08:52:42,936 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-28 08:52:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-10-28 08:52:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-10-28 08:52:42,937 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-10-28 08:52:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-10-28 08:52:42,938 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-10-28 08:52:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-10-28 08:52:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-10-28 08:52:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-10-28 08:52:42,939 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-10-28 08:52:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-10-28 08:52:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-10-28 08:52:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-10-28 08:52:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-10-28 08:52:42,940 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-10-28 08:52:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-10-28 08:52:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-10-28 08:52:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-10-28 08:52:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-10-28 08:52:42,941 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-10-28 08:52:42,942 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-10-28 08:52:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-10-28 08:52:42,943 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-10-28 08:52:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-10-28 08:52:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-10-28 08:52:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-10-28 08:52:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-10-28 08:52:42,944 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-10-28 08:52:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-10-28 08:52:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-10-28 08:52:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-10-28 08:52:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-10-28 08:52:42,945 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-10-28 08:52:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-10-28 08:52:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-10-28 08:52:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-10-28 08:52:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-10-28 08:52:42,946 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-10-28 08:52:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-10-28 08:52:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-10-28 08:52:42,947 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-10-28 08:52:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-10-28 08:52:42,948 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-10-28 08:52:42,949 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-10-28 08:52:42,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-28 08:52:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 08:52:42,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-28 08:52:42,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 08:52:42,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-28 08:52:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 08:52:42,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-28 08:52:42,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-28 08:52:42,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 08:52:42,963 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-10-28 08:52:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-10-28 08:52:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-10-28 08:52:42,964 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 08:52:43,415 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-10-28 08:52:43,681 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 08:52:43,681 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-10-28 08:52:43,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:43 BoogieIcfgContainer [2021-10-28 08:52:43,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 08:52:43,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 08:52:43,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 08:52:43,697 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 08:52:43,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:52:41" (1/3) ... [2021-10-28 08:52:43,698 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524288df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:43, skipping insertion in model container [2021-10-28 08:52:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:52:42" (2/3) ... [2021-10-28 08:52:43,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@524288df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:52:43, skipping insertion in model container [2021-10-28 08:52:43,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:43" (3/3) ... [2021-10-28 08:52:43,701 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-28 08:52:43,708 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 08:52:43,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-28 08:52:43,778 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 08:52:43,785 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 [2021-10-28 08:52:43,785 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-28 08:52:43,807 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-10-28 08:52:43,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:52:43,831 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:43,831 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:43,832 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:43,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1599181994, now seen corresponding path program 1 times [2021-10-28 08:52:43,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:43,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1888097706] [2021-10-28 08:52:43,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:43,856 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:43,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:43,862 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:43,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-28 08:52:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:44,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:52:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:44,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:44,245 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:44,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1888097706] [2021-10-28 08:52:44,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1888097706] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:44,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:44,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:52:44,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722625044] [2021-10-28 08:52:44,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:52:44,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:44,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:52:44,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:44,271 INFO L87 Difference]: Start difference. First operand has 34 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-10-28 08:52:44,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:44,364 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-10-28 08:52:44,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:52:44,367 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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 9 [2021-10-28 08:52:44,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:44,375 INFO L225 Difference]: With dead ends: 47 [2021-10-28 08:52:44,376 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 08:52:44,377 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:44,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 08:52:44,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-10-28 08:52:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.8095238095238095) internal successors, (38), 30 states have internal predecessors, (38), 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) [2021-10-28 08:52:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-10-28 08:52:44,415 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2021-10-28 08:52:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:44,416 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-10-28 08:52:44,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 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) [2021-10-28 08:52:44,417 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-10-28 08:52:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:52:44,417 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:44,417 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:44,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:44,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:44,631 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:44,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:44,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1599182037, now seen corresponding path program 1 times [2021-10-28 08:52:44,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:44,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1843634823] [2021-10-28 08:52:44,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:44,633 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:44,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:44,636 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-28 08:52:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:44,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:52:44,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:44,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:44,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:44,996 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:44,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1843634823] [2021-10-28 08:52:44,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1843634823] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:44,997 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:44,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 08:52:44,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842910434] [2021-10-28 08:52:44,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:52:44,999 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:45,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:52:45,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:45,000 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:45,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:45,089 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-28 08:52:45,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:52:45,090 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 9 [2021-10-28 08:52:45,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:45,091 INFO L225 Difference]: With dead ends: 38 [2021-10-28 08:52:45,092 INFO L226 Difference]: Without dead ends: 37 [2021-10-28 08:52:45,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:45,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-28 08:52:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-10-28 08:52:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 16 states have (on average 1.6875) internal successors, (27), 25 states have internal predecessors, (27), 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) [2021-10-28 08:52:45,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-10-28 08:52:45,098 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2021-10-28 08:52:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:45,098 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-10-28 08:52:45,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-10-28 08:52:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:52:45,099 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:45,100 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:45,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:45,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:45,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:45,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1599183352, now seen corresponding path program 1 times [2021-10-28 08:52:45,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:45,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411845433] [2021-10-28 08:52:45,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:45,314 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:45,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:45,315 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:45,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-28 08:52:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:45,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-28 08:52:45,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:45,529 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 [2021-10-28 08:52:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:45,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:45,612 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:45,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411845433] [2021-10-28 08:52:45,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1411845433] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:45,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:45,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-28 08:52:45,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704125327] [2021-10-28 08:52:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 08:52:45,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:45,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 08:52:45,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:45,619 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:45,692 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-28 08:52:45,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:52:45,693 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 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 9 [2021-10-28 08:52:45,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:45,694 INFO L225 Difference]: With dead ends: 27 [2021-10-28 08:52:45,695 INFO L226 Difference]: Without dead ends: 27 [2021-10-28 08:52:45,695 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 08:52:45,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-28 08:52:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-28 08:52:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.5625) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-28 08:52:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-28 08:52:45,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-10-28 08:52:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:45,699 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-28 08:52:45,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-28 08:52:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-28 08:52:45,700 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:45,700 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:45,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:45,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:45,901 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:45,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:45,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1599183353, now seen corresponding path program 1 times [2021-10-28 08:52:45,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:45,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [379463040] [2021-10-28 08:52:45,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:45,902 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:45,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:45,904 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:45,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-28 08:52:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:46,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:52:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:46,074 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 [2021-10-28 08:52:46,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,232 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:46,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [379463040] [2021-10-28 08:52:46,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [379463040] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:46,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:46,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-28 08:52:46,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491996528] [2021-10-28 08:52:46,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:46,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:46,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:46,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:46,236 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:46,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:46,309 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-28 08:52:46,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 08:52:46,312 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 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 9 [2021-10-28 08:52:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:46,313 INFO L225 Difference]: With dead ends: 25 [2021-10-28 08:52:46,313 INFO L226 Difference]: Without dead ends: 25 [2021-10-28 08:52:46,313 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:46,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-28 08:52:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-28 08:52:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 16 states have (on average 1.4375) internal successors, (23), 21 states have internal predecessors, (23), 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) [2021-10-28 08:52:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-28 08:52:46,316 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2021-10-28 08:52:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:46,316 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-28 08:52:46,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-28 08:52:46,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:52:46,317 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:46,317 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:46,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:46,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:46,518 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:46,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:46,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042382, now seen corresponding path program 1 times [2021-10-28 08:52:46,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:46,519 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320168649] [2021-10-28 08:52:46,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:46,520 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:46,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:46,521 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:46,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-28 08:52:46,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:46,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:52:46,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:46,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:46,827 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:46,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320168649] [2021-10-28 08:52:46,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320168649] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:46,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:46,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-28 08:52:46,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732333131] [2021-10-28 08:52:46,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:46,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:46,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:46,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:46,829 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:46,957 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-10-28 08:52:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:52:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 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 14 [2021-10-28 08:52:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:46,959 INFO L225 Difference]: With dead ends: 40 [2021-10-28 08:52:46,959 INFO L226 Difference]: Without dead ends: 40 [2021-10-28 08:52:46,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:46,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-28 08:52:46,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-10-28 08:52:46,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.411764705882353) internal successors, (24), 22 states have internal predecessors, (24), 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) [2021-10-28 08:52:46,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-10-28 08:52:46,970 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-10-28 08:52:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-10-28 08:52:46,971 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-10-28 08:52:46,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:52:46,972 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:46,972 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:46,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:47,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:47,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:47,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042425, now seen corresponding path program 1 times [2021-10-28 08:52:47,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:47,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1480367254] [2021-10-28 08:52:47,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:47,184 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:47,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:47,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:47,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-28 08:52:47,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-28 08:52:47,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:47,393 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 [2021-10-28 08:52:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:47,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:47,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:47,525 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:47,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1480367254] [2021-10-28 08:52:47,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1480367254] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:47,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:47,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-28 08:52:47,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412335410] [2021-10-28 08:52:47,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 08:52:47,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:47,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 08:52:47,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-28 08:52:47,527 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:47,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:47,660 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-28 08:52:47,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 08:52:47,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 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 14 [2021-10-28 08:52:47,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:47,662 INFO L225 Difference]: With dead ends: 31 [2021-10-28 08:52:47,662 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 08:52:47,663 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:47,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 08:52:47,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-10-28 08:52:47,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-10-28 08:52:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-28 08:52:47,667 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-10-28 08:52:47,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:47,668 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-28 08:52:47,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:47,668 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-28 08:52:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-28 08:52:47,669 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:47,669 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:47,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:47,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:47,880 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:47,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:47,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042426, now seen corresponding path program 1 times [2021-10-28 08:52:47,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:47,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2081439253] [2021-10-28 08:52:47,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:47,881 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:47,881 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:47,882 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:47,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-28 08:52:48,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:48,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 08:52:48,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:48,082 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 [2021-10-28 08:52:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:48,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:48,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:48,452 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:48,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2081439253] [2021-10-28 08:52:48,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2081439253] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:48,452 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:48,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-28 08:52:48,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406872526] [2021-10-28 08:52:48,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 08:52:48,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:48,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 08:52:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-28 08:52:48,455 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:48,690 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-10-28 08:52:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 08:52:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 14 [2021-10-28 08:52:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:48,692 INFO L225 Difference]: With dead ends: 35 [2021-10-28 08:52:48,693 INFO L226 Difference]: Without dead ends: 35 [2021-10-28 08:52:48,693 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-28 08:52:48,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-28 08:52:48,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-28 08:52:48,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.35) internal successors, (27), 24 states have internal predecessors, (27), 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) [2021-10-28 08:52:48,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-28 08:52:48,701 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-10-28 08:52:48,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:48,701 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-28 08:52:48,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:48,702 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-28 08:52:48,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-28 08:52:48,704 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:48,704 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:48,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:48,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:48,915 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:48,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash 52831098, now seen corresponding path program 1 times [2021-10-28 08:52:48,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:48,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [649313703] [2021-10-28 08:52:48,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:48,917 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:48,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:48,918 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:48,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-28 08:52:49,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 08:52:49,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 08:52:49,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 08:52:49,130 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 [2021-10-28 08:52:49,184 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-28 08:52:49,185 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 27 treesize of output 11 [2021-10-28 08:52:49,228 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 15 treesize of output 7 [2021-10-28 08:52:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:49,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-28 08:52:49,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 08:52:49,320 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-28 08:52:49,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [649313703] [2021-10-28 08:52:49,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [649313703] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-28 08:52:49,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-28 08:52:49,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-28 08:52:49,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117403373] [2021-10-28 08:52:49,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 08:52:49,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-28 08:52:49,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 08:52:49,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-28 08:52:49,323 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 08:52:49,464 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-28 08:52:49,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 08:52:49,467 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 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 16 [2021-10-28 08:52:49,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 08:52:49,467 INFO L225 Difference]: With dead ends: 32 [2021-10-28 08:52:49,468 INFO L226 Difference]: Without dead ends: 32 [2021-10-28 08:52:49,468 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-28 08:52:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-28 08:52:49,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-10-28 08:52:49,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.3) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-10-28 08:52:49,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-10-28 08:52:49,474 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-10-28 08:52:49,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 08:52:49,475 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-10-28 08:52:49,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-10-28 08:52:49,475 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-10-28 08:52:49,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 08:52:49,476 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 08:52:49,476 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:49,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:49,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:49,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-10-28 08:52:49,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 08:52:49,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1938067545, now seen corresponding path program 1 times [2021-10-28 08:52:49,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-28 08:52:49,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [706292777] [2021-10-28 08:52:49,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 08:52:49,683 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-28 08:52:49,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat [2021-10-28 08:52:49,684 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-28 08:52:49,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-28 08:52:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:49,883 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 08:52:49,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 08:52:49,989 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-10-28 08:52:49,989 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 08:52:49,990 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-10-28 08:52:49,992 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-10-28 08:52:49,992 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-10-28 08:52:49,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-10-28 08:52:49,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-10-28 08:52:49,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-10-28 08:52:49,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-10-28 08:52:49,993 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-28 08:52:49,994 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-10-28 08:52:49,994 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-10-28 08:52:50,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-28 08:52:50,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/mathsat -unsat_core_generation=3 [2021-10-28 08:52:50,197 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 08:52:50,200 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 08:52:50,209 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-10-28 08:52:50,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 08:52:50 BoogieIcfgContainer [2021-10-28 08:52:50,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 08:52:50,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 08:52:50,224 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 08:52:50,225 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 08:52:50,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:52:43" (3/4) ... [2021-10-28 08:52:50,229 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-28 08:52:50,229 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 08:52:50,230 INFO L168 Benchmark]: Toolchain (without parser) took 8227.47 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 52.7 MB in the beginning and 72.4 MB in the end (delta: -19.7 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:50,231 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 69.2 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:50,232 INFO L168 Benchmark]: CACSL2BoogieTranslator took 675.46 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 46.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:50,232 INFO L168 Benchmark]: Boogie Preprocessor took 127.09 ms. Allocated memory is still 69.2 MB. Free memory was 46.2 MB in the beginning and 43.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:50,233 INFO L168 Benchmark]: RCFGBuilder took 876.19 ms. Allocated memory is still 69.2 MB. Free memory was 43.2 MB in the beginning and 44.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:50,233 INFO L168 Benchmark]: TraceAbstraction took 6530.59 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 44.4 MB in the beginning and 72.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. [2021-10-28 08:52:50,234 INFO L168 Benchmark]: Witness Printer took 5.02 ms. Allocated memory is still 96.5 MB. Free memory is still 72.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 08:52:50,236 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 69.2 MB. Free memory is still 51.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 675.46 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 46.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 11.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 127.09 ms. Allocated memory is still 69.2 MB. Free memory was 46.2 MB in the beginning and 43.2 MB in the end (delta: 3.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 876.19 ms. Allocated memory is still 69.2 MB. Free memory was 43.2 MB in the beginning and 44.7 MB in the end (delta: -1.5 MB). Peak memory consumption was 19.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6530.59 ms. Allocated memory was 69.2 MB in the beginning and 96.5 MB in the end (delta: 27.3 MB). Free memory was 44.4 MB in the beginning and 72.4 MB in the end (delta: -28.0 MB). Peak memory consumption was 39.7 MB. Max. memory is 16.1 GB. * Witness Printer took 5.02 ms. Allocated memory is still 96.5 MB. Free memory is still 72.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) VAL [p={0:0}, t={1:0}] [L537] t->h = 1 VAL [p={0:0}, t={1:0}] [L538] t->n = p VAL [p={0:0}, t={1:0}] [L539] p = t VAL [p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [p={1:0}, t={1:0}] [L542] EXPR p->h VAL [p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [p={0:0}, t={1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 59 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 6.4s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 153 SDtfs, 203 SDslu, 118 SDs, 0 SdLazy, 193 SolverSat, 15 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 186 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 113 NumberOfCodeBlocks, 113 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 172 ConstructedInterpolants, 0 QuantifiedInterpolants, 648 SizeOfPredicates, 9 NumberOfNonLiveVariables, 556 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-28 08:52:50,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0b6dea35-c195-48d7-9687-7b03104d0bc8/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...