./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 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/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_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:20:46,854 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:20:46,856 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:20:46,908 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:20:46,909 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:20:46,914 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:20:46,916 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:20:46,921 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:20:46,924 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:20:46,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:20:46,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:20:46,935 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:20:46,936 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:20:46,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:20:46,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:20:46,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:20:46,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:20:46,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:20:46,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:20:46,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:20:46,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:20:46,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:20:46,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:20:46,968 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:20:46,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:20:46,980 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:20:46,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:20:46,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:20:46,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:20:46,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:20:46,986 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:20:46,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:20:46,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:20:46,990 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:20:46,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:20:46,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:20:46,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:20:46,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:20:46,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:20:46,994 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:20:46,995 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:20:46,996 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:20:47,043 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:20:47,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:20:47,044 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:20:47,045 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:20:47,053 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:20:47,053 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:20:47,053 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:20:47,054 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:20:47,054 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:20:47,054 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:20:47,055 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:20:47,056 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:20:47,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:20:47,056 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:20:47,056 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:20:47,056 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:20:47,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:20:47,057 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:20:47,057 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:20:47,057 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:20:47,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:20:47,058 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:20:47,058 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:20:47,058 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:47,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:20:47,059 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:20:47,059 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:20:47,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:20:47,060 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:20:47,061 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-02 22:20:47,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:20:47,374 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:20:47,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:20:47,380 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:20:47,381 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:20:47,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:20:47,476 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/37e0caf76/1aaf611d70444ceea5a8e3704ba1c5b2/FLAGaee88ba73 [2021-11-02 22:20:47,987 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:20:47,987 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:20:48,002 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/37e0caf76/1aaf611d70444ceea5a8e3704ba1c5b2/FLAGaee88ba73 [2021-11-02 22:20:48,315 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/37e0caf76/1aaf611d70444ceea5a8e3704ba1c5b2 [2021-11-02 22:20:48,318 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:20:48,319 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:20:48,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:48,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:20:48,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:20:48,333 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,334 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cdff059 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48, skipping insertion in model container [2021-11-02 22:20:48,334 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,342 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:20:48,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:20:48,724 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:20:48,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:48,748 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:20:48,812 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:20:48,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:48,851 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:20:48,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48 WrapperNode [2021-11-02 22:20:48,852 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:48,854 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:20:48,854 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:20:48,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:20:48,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,903 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,903 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,928 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,943 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:20:48,962 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:20:48,962 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:20:48,962 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:20:48,964 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (1/1) ... [2021-11-02 22:20:48,977 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:48,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:49,009 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:20:49,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:20:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:20:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:20:49,061 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:20:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:20:49,062 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:20:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:20:49,063 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:20:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:20:49,064 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:20:49,065 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:20:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:20:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:20:49,065 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:20:49,066 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:20:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:20:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:20:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:20:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:20:49,067 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:20:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:20:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:20:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:20:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:20:49,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:20:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:20:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:20:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:20:49,069 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:20:49,070 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:20:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:20:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:20:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:20:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:20:49,071 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:20:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:20:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:20:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:20:49,072 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:20:49,073 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:20:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:20:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:20:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:20:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:20:49,074 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:20:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:20:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:20:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:20:49,075 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:20:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:20:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:20:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:20:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:20:49,076 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:20:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:20:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:20:49,077 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:20:49,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:20:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:20:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:20:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:20:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:20:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:20:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:20:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:20:49,081 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:20:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:20:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:20:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:20:49,082 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:20:49,083 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:20:49,083 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:20:49,083 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:20:49,084 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:20:49,085 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:20:49,086 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:20:49,086 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:20:49,086 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:20:49,086 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:20:49,086 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:20:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:20:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:20:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:20:49,087 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:20:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:20:49,088 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:20:49,089 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:20:49,090 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:20:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:20:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:20:49,091 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:20:49,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:20:49,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:20:49,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:20:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:20:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:20:49,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:20:49,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:20:49,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:20:49,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:20:49,418 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:20:49,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:20:49,560 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-02 22:20:49,562 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:49 BoogieIcfgContainer [2021-11-02 22:20:49,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:20:49,564 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:20:49,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:20:49,568 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:20:49,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:20:48" (1/3) ... [2021-11-02 22:20:49,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6626f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:49, skipping insertion in model container [2021-11-02 22:20:49,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:48" (2/3) ... [2021-11-02 22:20:49,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c6626f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:49, skipping insertion in model container [2021-11-02 22:20:49,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:49" (3/3) ... [2021-11-02 22:20:49,572 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-02 22:20:49,578 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:20:49,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-02 22:20:49,626 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:20:49,633 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 [2021-11-02 22:20:49,633 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-02 22:20:49,648 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) [2021-11-02 22:20:49,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:20:49,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:49,657 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:49,657 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:49,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:49,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1752578520, now seen corresponding path program 1 times [2021-11-02 22:20:49,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:49,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779526665] [2021-11-02 22:20:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:49,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:49,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:49,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:49,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:49,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779526665] [2021-11-02 22:20:49,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779526665] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:49,860 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:49,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:49,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55329046] [2021-11-02 22:20:49,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:49,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:49,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:49,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:49,884 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) [2021-11-02 22:20:49,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:49,973 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-11-02 22:20:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:49,975 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 [2021-11-02 22:20:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,009 INFO L225 Difference]: With dead ends: 50 [2021-11-02 22:20:50,009 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:20:50,011 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 [2021-11-02 22:20:50,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:20:50,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 36. [2021-11-02 22:20:50,042 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) [2021-11-02 22:20:50,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2021-11-02 22:20:50,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2021-11-02 22:20:50,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,046 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2021-11-02 22:20:50,046 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) [2021-11-02 22:20:50,046 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2021-11-02 22:20:50,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:20:50,047 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,047 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:20:50,048 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1503990498, now seen corresponding path program 1 times [2021-11-02 22:20:50,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254256692] [2021-11-02 22:20:50,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:50,173 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:50,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254256692] [2021-11-02 22:20:50,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254256692] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:50,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:50,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:20:50,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537082448] [2021-11-02 22:20:50,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:50,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:50,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:50,178 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) [2021-11-02 22:20:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,254 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-02 22:20:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:50,255 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 [2021-11-02 22:20:50,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,256 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:20:50,256 INFO L226 Difference]: Without dead ends: 39 [2021-11-02 22:20:50,257 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 [2021-11-02 22:20:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-02 22:20:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2021-11-02 22:20:50,260 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) [2021-11-02 22:20:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-11-02 22:20:50,262 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 10 [2021-11-02 22:20:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,262 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-11-02 22:20:50,263 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) [2021-11-02 22:20:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-11-02 22:20:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:20:50,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,264 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:20:50,264 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1503991813, now seen corresponding path program 1 times [2021-11-02 22:20:50,265 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,265 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581060569] [2021-11-02 22:20:50,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:50,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:50,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581060569] [2021-11-02 22:20:50,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581060569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:50,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:50,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:50,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365519962] [2021-11-02 22:20:50,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:50,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:50,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:50,338 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) [2021-11-02 22:20:50,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,395 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-11-02 22:20:50,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:50,395 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 [2021-11-02 22:20:50,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,396 INFO L225 Difference]: With dead ends: 29 [2021-11-02 22:20:50,397 INFO L226 Difference]: Without dead ends: 29 [2021-11-02 22:20:50,397 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 [2021-11-02 22:20:50,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-02 22:20:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-11-02 22:20:50,400 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) [2021-11-02 22:20:50,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-02 22:20:50,402 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2021-11-02 22:20:50,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,402 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-02 22:20:50,402 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) [2021-11-02 22:20:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-02 22:20:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-02 22:20:50,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,403 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:20:50,404 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1503991814, now seen corresponding path program 1 times [2021-11-02 22:20:50,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475414430] [2021-11-02 22:20:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:50,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:50,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:50,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475414430] [2021-11-02 22:20:50,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475414430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:50,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:50,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:20:50,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527445735] [2021-11-02 22:20:50,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:50,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:50,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:50,492 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) [2021-11-02 22:20:50,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,549 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-02 22:20:50,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:20:50,550 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 [2021-11-02 22:20:50,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,551 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:20:50,551 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:20:50,552 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 [2021-11-02 22:20:50,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:20:50,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 22:20:50,566 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) [2021-11-02 22:20:50,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-02 22:20:50,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 10 [2021-11-02 22:20:50,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,572 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-02 22:20:50,572 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) [2021-11-02 22:20:50,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-02 22:20:50,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:20:50,573 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,573 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:20:50,574 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,574 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629249, now seen corresponding path program 1 times [2021-11-02 22:20:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674914924] [2021-11-02 22:20:50,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:50,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,648 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:50,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:50,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674914924] [2021-11-02 22:20:50,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674914924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:50,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:50,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:20:50,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914861523] [2021-11-02 22:20:50,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:50,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:50,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:50,650 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) [2021-11-02 22:20:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,727 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2021-11-02 22:20:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:50,728 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 [2021-11-02 22:20:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,730 INFO L225 Difference]: With dead ends: 42 [2021-11-02 22:20:50,730 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 22:20:50,730 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 [2021-11-02 22:20:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 22:20:50,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 28. [2021-11-02 22:20:50,734 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) [2021-11-02 22:20:50,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-02 22:20:50,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-11-02 22:20:50,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,736 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-02 22:20:50,736 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) [2021-11-02 22:20:50,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-02 22:20:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:20:50,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,737 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:20:50,737 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,738 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629292, now seen corresponding path program 1 times [2021-11-02 22:20:50,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113454874] [2021-11-02 22:20:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:50,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:50,865 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:50,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:50,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113454874] [2021-11-02 22:20:50,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113454874] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:50,868 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:50,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:20:50,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602896057] [2021-11-02 22:20:50,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:50,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:50,870 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) [2021-11-02 22:20:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:50,951 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-11-02 22:20:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:50,952 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 [2021-11-02 22:20:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:50,953 INFO L225 Difference]: With dead ends: 33 [2021-11-02 22:20:50,953 INFO L226 Difference]: Without dead ends: 33 [2021-11-02 22:20:50,954 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 [2021-11-02 22:20:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-02 22:20:50,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2021-11-02 22:20:50,959 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) [2021-11-02 22:20:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-02 22:20:50,960 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 16 [2021-11-02 22:20:50,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:50,961 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-02 22:20:50,961 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) [2021-11-02 22:20:50,962 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-02 22:20:50,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:20:50,963 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:50,963 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:50,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:20:50,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:50,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:50,964 INFO L85 PathProgramCache]: Analyzing trace with hash 2071629293, now seen corresponding path program 1 times [2021-11-02 22:20:50,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:50,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000657263] [2021-11-02 22:20:50,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:50,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:51,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:51,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:51,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:51,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000657263] [2021-11-02 22:20:51,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000657263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:51,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:51,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:20:51,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287957711] [2021-11-02 22:20:51,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:20:51,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:51,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:20:51,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:20:51,122 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) [2021-11-02 22:20:51,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:51,209 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-11-02 22:20:51,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:20:51,210 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 [2021-11-02 22:20:51,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:51,213 INFO L225 Difference]: With dead ends: 37 [2021-11-02 22:20:51,213 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 22:20:51,213 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 [2021-11-02 22:20:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 22:20:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2021-11-02 22:20:51,218 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) [2021-11-02 22:20:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-11-02 22:20:51,222 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2021-11-02 22:20:51,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:51,222 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-11-02 22:20:51,223 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) [2021-11-02 22:20:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-11-02 22:20:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 22:20:51,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:51,224 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:51,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:20:51,224 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:51,225 INFO L85 PathProgramCache]: Analyzing trace with hash -2029074739, now seen corresponding path program 1 times [2021-11-02 22:20:51,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:51,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587418139] [2021-11-02 22:20:51,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:51,226 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:51,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:51,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:20:51,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:51,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:20:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587418139] [2021-11-02 22:20:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587418139] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:51,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:51,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:20:51,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232557009] [2021-11-02 22:20:51,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:20:51,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:20:51,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:20:51,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:20:51,341 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) [2021-11-02 22:20:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:51,427 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-11-02 22:20:51,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 22:20:51,428 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 [2021-11-02 22:20:51,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:51,430 INFO L225 Difference]: With dead ends: 34 [2021-11-02 22:20:51,430 INFO L226 Difference]: Without dead ends: 34 [2021-11-02 22:20:51,431 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 [2021-11-02 22:20:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-02 22:20:51,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2021-11-02 22:20:51,440 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) [2021-11-02 22:20:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-11-02 22:20:51,442 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2021-11-02 22:20:51,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:51,442 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-11-02 22:20:51,442 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) [2021-11-02 22:20:51,443 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-11-02 22:20:51,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:20:51,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:51,443 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] [2021-11-02 22:20:51,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:20:51,444 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:51,444 INFO L85 PathProgramCache]: Analyzing trace with hash -790989135, now seen corresponding path program 1 times [2021-11-02 22:20:51,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:20:51,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098710033] [2021-11-02 22:20:51,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:51,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:20:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:20:51,479 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:20:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:20:51,527 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-02 22:20:51,527 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:20:51,528 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 22:20:51,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-02 22:20:51,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-02 22:20:51,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-02 22:20:51,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-02 22:20:51,531 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-02 22:20:51,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-02 22:20:51,532 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-11-02 22:20:51,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-02 22:20:51,534 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-02 22:20:51,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:20:51,538 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:51,540 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:20:51,556 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-02 22:20:51,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:20:51 BoogieIcfgContainer [2021-11-02 22:20:51,576 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:20:51,577 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:20:51,577 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:20:51,577 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:20:51,578 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:49" (3/4) ... [2021-11-02 22:20:51,581 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:20:51,581 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:20:51,584 INFO L168 Benchmark]: Toolchain (without parser) took 3262.41 ms. Allocated memory was 113.2 MB in the beginning and 153.1 MB in the end (delta: 39.8 MB). Free memory was 71.9 MB in the beginning and 80.9 MB in the end (delta: -9.0 MB). Peak memory consumption was 29.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:20:51,585 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 90.1 MB in the beginning and 90.0 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:20:51,587 INFO L168 Benchmark]: CACSL2BoogieTranslator took 525.53 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 82.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-11-02 22:20:51,588 INFO L168 Benchmark]: Boogie Preprocessor took 106.82 ms. Allocated memory is still 113.2 MB. Free memory was 82.5 MB in the beginning and 80.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-02 22:20:51,588 INFO L168 Benchmark]: RCFGBuilder took 601.01 ms. Allocated memory is still 113.2 MB. Free memory was 79.7 MB in the beginning and 60.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-11-02 22:20:51,589 INFO L168 Benchmark]: TraceAbstraction took 2011.76 ms. Allocated memory was 113.2 MB in the beginning and 153.1 MB in the end (delta: 39.8 MB). Free memory was 60.2 MB in the beginning and 81.9 MB in the end (delta: -21.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:20:51,589 INFO L168 Benchmark]: Witness Printer took 3.99 ms. Allocated memory is still 153.1 MB. Free memory is still 80.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:20:51,593 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 113.2 MB. Free memory was 90.1 MB in the beginning and 90.0 MB in the end (delta: 62.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 525.53 ms. Allocated memory is still 113.2 MB. Free memory was 71.7 MB in the beginning and 82.5 MB in the end (delta: -10.8 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 106.82 ms. Allocated memory is still 113.2 MB. Free memory was 82.5 MB in the beginning and 80.0 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 601.01 ms. Allocated memory is still 113.2 MB. Free memory was 79.7 MB in the beginning and 60.5 MB in the end (delta: 19.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2011.76 ms. Allocated memory was 113.2 MB in the beginning and 153.1 MB in the end (delta: 39.8 MB). Free memory was 60.2 MB in the beginning and 81.9 MB in the end (delta: -21.8 MB). Peak memory consumption was 21.2 MB. Max. memory is 16.1 GB. * Witness Printer took 3.99 ms. Allocated memory is still 153.1 MB. Free memory is still 80.9 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: 1.9s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s 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, 0.6s 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 [2021-11-02 22:20:51,644 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/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_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:20:54,093 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:20:54,096 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:20:54,150 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:20:54,151 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:20:54,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:20:54,158 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:20:54,164 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:20:54,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:20:54,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:20:54,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:20:54,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:20:54,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:20:54,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:20:54,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:20:54,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:20:54,189 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:20:54,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:20:54,196 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:20:54,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:20:54,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:20:54,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:20:54,210 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:20:54,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:20:54,221 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:20:54,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:20:54,222 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:20:54,224 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:20:54,225 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:20:54,226 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:20:54,227 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:20:54,228 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:20:54,230 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:20:54,231 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:20:54,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:20:54,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:20:54,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:20:54,235 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:20:54,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:20:54,237 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:20:54,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:20:54,243 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-11-02 22:20:54,286 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:20:54,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:20:54,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:20:54,288 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:20:54,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:20:54,290 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:20:54,290 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:20:54,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:20:54,291 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:20:54,291 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:20:54,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:20:54,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:20:54,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:20:54,293 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:20:54,293 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:20:54,294 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:20:54,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:20:54,294 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:20:54,294 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-02 22:20:54,295 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-02 22:20:54,295 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:20:54,295 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:20:54,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:20:54,296 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:20:54,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:20:54,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:54,297 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:20:54,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:20:54,297 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-02 22:20:54,297 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-02 22:20:54,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:20:54,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-02 22:20:54,298 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-11-02 22:20:54,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:20:54,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:20:54,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:20:54,765 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:20:54,765 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:20:54,766 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:20:54,849 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/eb2299236/a09c9d13cb684424b56fce6daadf5c79/FLAGc65228c70 [2021-11-02 22:20:55,433 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:20:55,437 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-11-02 22:20:55,456 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/eb2299236/a09c9d13cb684424b56fce6daadf5c79/FLAGc65228c70 [2021-11-02 22:20:55,729 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/data/eb2299236/a09c9d13cb684424b56fce6daadf5c79 [2021-11-02 22:20:55,734 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:20:55,736 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:20:55,740 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:55,740 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:20:55,744 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:20:55,744 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:55" (1/1) ... [2021-11-02 22:20:55,746 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@557b48b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:55, skipping insertion in model container [2021-11-02 22:20:55,747 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:20:55" (1/1) ... [2021-11-02 22:20:55,754 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:20:55,811 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:20:56,224 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:20:56,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:56,246 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:20:56,304 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_90a75843-7193-45f9-a474-e8fff3cc9e9c/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-11-02 22:20:56,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:20:56,359 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:20:56,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56 WrapperNode [2021-11-02 22:20:56,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:20:56,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:20:56,363 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:20:56,363 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:20:56,375 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,375 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:20:56,493 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:20:56,493 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:20:56,493 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:20:56,494 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (1/1) ... [2021-11-02 22:20:56,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:20:56,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:20:56,523 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:20:56,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:20:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:20:56,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:20:56,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:20:56,576 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:20:56,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-02 22:20:56,577 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-02 22:20:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-02 22:20:56,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-02 22:20:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-02 22:20:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-11-02 22:20:56,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:20:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:20:56,580 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:20:56,581 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:20:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:20:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:20:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:20:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:20:56,582 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:20:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:20:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:20:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:20:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:20:56,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:20:56,584 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-02 22:20:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-02 22:20:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-02 22:20:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-02 22:20:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-02 22:20:56,585 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:20:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:20:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:20:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:20:56,586 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:20:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:20:56,587 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:20:56,588 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:20:56,589 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:20:56,590 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:20:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:20:56,591 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:20:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:20:56,592 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:20:56,593 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:20:56,593 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:20:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:20:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:20:56,594 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:20:56,595 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:20:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:20:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:20:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:20:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:20:56,596 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:20:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:20:56,597 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:20:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:20:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:20:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:20:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:20:56,598 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:20:56,599 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:20:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:20:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:20:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:20:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:20:56,600 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:20:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:20:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:20:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:20:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:20:56,601 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:20:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:20:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:20:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:20:56,602 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:20:56,603 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:20:56,604 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:20:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:20:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:20:56,605 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:20:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:20:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:20:56,606 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:20:56,607 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-11-02 22:20:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:20:56,610 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:20:56,611 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-02 22:20:56,612 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:20:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-02 22:20:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:20:56,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:20:56,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-02 22:20:56,615 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:20:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-11-02 22:20:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-02 22:20:56,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-02 22:20:56,621 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:20:56,990 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-11-02 22:20:57,156 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:20:57,156 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-02 22:20:57,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:57 BoogieIcfgContainer [2021-11-02 22:20:57,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:20:57,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:20:57,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:20:57,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:20:57,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:20:55" (1/3) ... [2021-11-02 22:20:57,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b08d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:57, skipping insertion in model container [2021-11-02 22:20:57,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:20:56" (2/3) ... [2021-11-02 22:20:57,167 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63b08d96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:20:57, skipping insertion in model container [2021-11-02 22:20:57,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:57" (3/3) ... [2021-11-02 22:20:57,171 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-11-02 22:20:57,177 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:20:57,177 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-11-02 22:20:57,235 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:20:57,244 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 [2021-11-02 22:20:57,244 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-11-02 22:20:57,260 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) [2021-11-02 22:20:57,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:20:57,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:57,276 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:57,276 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:57,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:57,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1599181994, now seen corresponding path program 1 times [2021-11-02 22:20:57,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:20:57,295 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801712416] [2021-11-02 22:20:57,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:57,296 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:20:57,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:20:57,303 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:20:57,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-02 22:20:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:57,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:57,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:57,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:57,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:20:57,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:57,611 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:20:57,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1801712416] [2021-11-02 22:20:57,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1801712416] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:57,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:57,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:20:57,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693726552] [2021-11-02 22:20:57,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:57,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:20:57,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:57,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:57,636 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) [2021-11-02 22:20:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:57,716 INFO L93 Difference]: Finished difference Result 47 states and 51 transitions. [2021-11-02 22:20:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:57,718 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 [2021-11-02 22:20:57,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:57,726 INFO L225 Difference]: With dead ends: 47 [2021-11-02 22:20:57,726 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:20:57,728 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 [2021-11-02 22:20:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:20:57,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2021-11-02 22:20:57,757 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) [2021-11-02 22:20:57,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-11-02 22:20:57,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 9 [2021-11-02 22:20:57,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:57,760 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-11-02 22:20:57,760 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) [2021-11-02 22:20:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-11-02 22:20:57,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:20:57,761 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:57,761 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:57,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:57,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:20:57,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1599182037, now seen corresponding path program 1 times [2021-11-02 22:20:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:20:57,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [235148603] [2021-11-02 22:20:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:57,964 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:20:57,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:20:57,965 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:20:57,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-02 22:20:58,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:58,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:20:58,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:58,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:58,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:20:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:58,250 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:20:58,251 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [235148603] [2021-11-02 22:20:58,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [235148603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:58,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:58,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:20:58,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000366393] [2021-11-02 22:20:58,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:58,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:20:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:58,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:58,254 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) [2021-11-02 22:20:58,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:58,333 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-11-02 22:20:58,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:58,334 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 [2021-11-02 22:20:58,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:58,335 INFO L225 Difference]: With dead ends: 38 [2021-11-02 22:20:58,335 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 22:20:58,336 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 [2021-11-02 22:20:58,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 22:20:58,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2021-11-02 22:20:58,339 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) [2021-11-02 22:20:58,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-11-02 22:20:58,340 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2021-11-02 22:20:58,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:58,341 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-11-02 22:20:58,341 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) [2021-11-02 22:20:58,341 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-11-02 22:20:58,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:20:58,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:58,342 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:58,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-02 22:20:58,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:20:58,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:58,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:58,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1599183352, now seen corresponding path program 1 times [2021-11-02 22:20:58,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:20:58,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1759007914] [2021-11-02 22:20:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:58,544 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:20:58,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:20:58,546 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:20:58,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-02 22:20:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:58,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-02 22:20:58,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:58,757 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 [2021-11-02 22:20:58,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:58,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:20:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:58,828 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:20:58,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1759007914] [2021-11-02 22:20:58,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1759007914] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:58,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:58,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-02 22:20:58,830 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261532231] [2021-11-02 22:20:58,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 22:20:58,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:20:58,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 22:20:58,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 22:20:58,831 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) [2021-11-02 22:20:58,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:58,888 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-11-02 22:20:58,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:58,890 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 [2021-11-02 22:20:58,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:58,891 INFO L225 Difference]: With dead ends: 27 [2021-11-02 22:20:58,891 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 22:20:58,891 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 [2021-11-02 22:20:58,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 22:20:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 22:20:58,894 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) [2021-11-02 22:20:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-11-02 22:20:58,896 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-11-02 22:20:58,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:58,896 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-11-02 22:20:58,896 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) [2021-11-02 22:20:58,897 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-11-02 22:20:58,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-02 22:20:58,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:58,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:58,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-02 22:20:59,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:20:59,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:59,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:59,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1599183353, now seen corresponding path program 1 times [2021-11-02 22:20:59,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:20:59,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959169208] [2021-11-02 22:20:59,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:59,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:20:59,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:20:59,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:20:59,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-02 22:20:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:59,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:20:59,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:59,333 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 [2021-11-02 22:20:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:59,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:20:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:59,483 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:20:59,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959169208] [2021-11-02 22:20:59,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959169208] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:20:59,484 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:20:59,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-11-02 22:20:59,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704497166] [2021-11-02 22:20:59,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:20:59,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:20:59,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:20:59,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:20:59,486 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) [2021-11-02 22:20:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:20:59,550 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-11-02 22:20:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 22:20:59,553 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 [2021-11-02 22:20:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:20:59,554 INFO L225 Difference]: With dead ends: 25 [2021-11-02 22:20:59,554 INFO L226 Difference]: Without dead ends: 25 [2021-11-02 22:20:59,554 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 [2021-11-02 22:20:59,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-02 22:20:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-11-02 22:20:59,557 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) [2021-11-02 22:20:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-11-02 22:20:59,558 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 9 [2021-11-02 22:20:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:20:59,558 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-11-02 22:20:59,559 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) [2021-11-02 22:20:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-11-02 22:20:59,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:20:59,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:20:59,559 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:20:59,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:20:59,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:20:59,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:20:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:20:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042382, now seen corresponding path program 1 times [2021-11-02 22:20:59,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:20:59,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378844081] [2021-11-02 22:20:59,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:20:59,770 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:20:59,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:20:59,771 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:20:59,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-02 22:20:59,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:20:59,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:20:59,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:20:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:20:59,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:21:00,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:00,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:21:00,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378844081] [2021-11-02 22:21:00,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378844081] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:00,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:00,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-02 22:21:00,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420810178] [2021-11-02 22:21:00,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:00,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:21:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:00,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:00,058 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) [2021-11-02 22:21:00,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:00,180 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2021-11-02 22:21:00,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:00,182 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 [2021-11-02 22:21:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:00,182 INFO L225 Difference]: With dead ends: 40 [2021-11-02 22:21:00,183 INFO L226 Difference]: Without dead ends: 40 [2021-11-02 22:21:00,183 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 [2021-11-02 22:21:00,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-02 22:21:00,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 26. [2021-11-02 22:21:00,186 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) [2021-11-02 22:21:00,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-11-02 22:21:00,187 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2021-11-02 22:21:00,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:00,187 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-11-02 22:21:00,188 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) [2021-11-02 22:21:00,188 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-11-02 22:21:00,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:21:00,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:00,188 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:00,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:00,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:21:00,389 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr4REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:21:00,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:00,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042425, now seen corresponding path program 1 times [2021-11-02 22:21:00,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:21:00,390 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [478993089] [2021-11-02 22:21:00,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:00,390 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:21:00,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:21:00,392 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:21:00,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-02 22:21:00,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:00,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-02 22:21:00,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:00,560 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 [2021-11-02 22:21:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:00,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:21:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:00,676 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:21:00,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [478993089] [2021-11-02 22:21:00,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [478993089] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:00,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:00,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-02 22:21:00,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894329515] [2021-11-02 22:21:00,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:21:00,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:21:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:21:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:21:00,679 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) [2021-11-02 22:21:00,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:00,801 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-11-02 22:21:00,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:21:00,801 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 [2021-11-02 22:21:00,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:00,802 INFO L225 Difference]: With dead ends: 31 [2021-11-02 22:21:00,802 INFO L226 Difference]: Without dead ends: 31 [2021-11-02 22:21:00,803 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 [2021-11-02 22:21:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-02 22:21:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-11-02 22:21:00,805 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) [2021-11-02 22:21:00,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-11-02 22:21:00,806 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 14 [2021-11-02 22:21:00,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:00,806 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-11-02 22:21:00,806 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) [2021-11-02 22:21:00,806 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-11-02 22:21:00,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 22:21:00,807 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:00,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:00,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:01,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:21:01,019 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr5REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:21:01,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:01,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1238042426, now seen corresponding path program 1 times [2021-11-02 22:21:01,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:21:01,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1376855154] [2021-11-02 22:21:01,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:01,020 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:21:01,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:21:01,021 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:21:01,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-02 22:21:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-02 22:21:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:01,194 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 [2021-11-02 22:21:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:01,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:21:01,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:01,504 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:21:01,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1376855154] [2021-11-02 22:21:01,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1376855154] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:01,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:01,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-02 22:21:01,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199762959] [2021-11-02 22:21:01,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:21:01,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:21:01,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:21:01,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:21:01,506 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) [2021-11-02 22:21:01,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:01,705 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-11-02 22:21:01,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:21:01,705 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 [2021-11-02 22:21:01,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:01,706 INFO L225 Difference]: With dead ends: 35 [2021-11-02 22:21:01,706 INFO L226 Difference]: Without dead ends: 35 [2021-11-02 22:21:01,707 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 [2021-11-02 22:21:01,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-02 22:21:01,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-11-02 22:21:01,709 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) [2021-11-02 22:21:01,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-11-02 22:21:01,710 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2021-11-02 22:21:01,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:01,710 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-11-02 22:21:01,711 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) [2021-11-02 22:21:01,711 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-11-02 22:21:01,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:21:01,712 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:01,712 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:01,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-02 22:21:01,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:21:01,916 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr6ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:21:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 52831098, now seen corresponding path program 1 times [2021-11-02 22:21:01,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:21:01,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1802648040] [2021-11-02 22:21:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:01,922 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:21:01,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:21:01,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:21:01,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-02 22:21:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:21:02,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 22:21:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:21:02,121 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 [2021-11-02 22:21:02,161 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:21:02,162 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 [2021-11-02 22:21:02,210 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 [2021-11-02 22:21:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:02,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-02 22:21:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:21:02,308 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-02 22:21:02,308 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1802648040] [2021-11-02 22:21:02,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1802648040] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-02 22:21:02,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:21:02,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-02 22:21:02,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713437368] [2021-11-02 22:21:02,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:21:02,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-02 22:21:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:21:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:21:02,312 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) [2021-11-02 22:21:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:21:02,449 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-11-02 22:21:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:21:02,450 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 [2021-11-02 22:21:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:21:02,451 INFO L225 Difference]: With dead ends: 32 [2021-11-02 22:21:02,451 INFO L226 Difference]: Without dead ends: 32 [2021-11-02 22:21:02,451 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 [2021-11-02 22:21:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-02 22:21:02,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2021-11-02 22:21:02,454 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) [2021-11-02 22:21:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-02 22:21:02,456 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 16 [2021-11-02 22:21:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:21:02,456 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-02 22:21:02,457 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) [2021-11-02 22:21:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-02 22:21:02,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-02 22:21:02,457 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:21:02,457 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:02,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:02,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:21:02,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 5 more)] === [2021-11-02 22:21:02,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:21:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1938067545, now seen corresponding path program 1 times [2021-11-02 22:21:02,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-02 22:21:02,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [296287424] [2021-11-02 22:21:02,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:21:02,659 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-02 22:21:02,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat [2021-11-02 22:21:02,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-02 22:21:02,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-02 22:21:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:21:02,830 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-02 22:21:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-02 22:21:02,905 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-02 22:21:02,906 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-02 22:21:02,906 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-11-02 22:21:02,908 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-11-02 22:21:02,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-11-02 22:21:02,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-11-02 22:21:02,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-11-02 22:21:02,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-11-02 22:21:02,909 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-11-02 22:21:02,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-11-02 22:21:02,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-11-02 22:21:02,910 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-11-02 22:21:02,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:21:03,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/mathsat -unsat_core_generation=3 [2021-11-02 22:21:03,121 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:21:03,124 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-02 22:21:03,132 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-11-02 22:21:03,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.11 10:21:03 BoogieIcfgContainer [2021-11-02 22:21:03,145 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-02 22:21:03,146 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-02 22:21:03,146 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-02 22:21:03,146 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-02 22:21:03,147 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:20:57" (3/4) ... [2021-11-02 22:21:03,150 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-02 22:21:03,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-02 22:21:03,151 INFO L168 Benchmark]: Toolchain (without parser) took 7414.84 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 39.5 MB in the beginning and 55.9 MB in the end (delta: -16.4 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2021-11-02 22:21:03,151 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 60.8 MB. Free memory is still 42.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:21:03,152 INFO L168 Benchmark]: CACSL2BoogieTranslator took 621.85 ms. Allocated memory is still 60.8 MB. Free memory was 39.4 MB in the beginning and 37.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-02 22:21:03,152 INFO L168 Benchmark]: Boogie Preprocessor took 129.68 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:21:03,153 INFO L168 Benchmark]: RCFGBuilder took 665.71 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 33.8 MB in the beginning and 52.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. [2021-11-02 22:21:03,153 INFO L168 Benchmark]: TraceAbstraction took 5985.30 ms. Allocated memory is still 81.8 MB. Free memory was 52.1 MB in the beginning and 56.5 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:21:03,154 INFO L168 Benchmark]: Witness Printer took 4.12 ms. Allocated memory is still 81.8 MB. Free memory is still 55.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-02 22:21:03,156 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 60.8 MB. Free memory is still 42.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 621.85 ms. Allocated memory is still 60.8 MB. Free memory was 39.4 MB in the beginning and 37.0 MB in the end (delta: 2.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 129.68 ms. Allocated memory is still 60.8 MB. Free memory was 37.0 MB in the beginning and 34.0 MB in the end (delta: 2.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 665.71 ms. Allocated memory was 60.8 MB in the beginning and 81.8 MB in the end (delta: 21.0 MB). Free memory was 33.8 MB in the beginning and 52.9 MB in the end (delta: -19.0 MB). Peak memory consumption was 15.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5985.30 ms. Allocated memory is still 81.8 MB. Free memory was 52.1 MB in the beginning and 56.5 MB in the end (delta: -4.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 4.12 ms. Allocated memory is still 81.8 MB. Free memory is still 55.9 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 11 procedures, 59 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, 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, 0.5s 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, 1.4s 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 [2021-11-02 22:21:03,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_90a75843-7193-45f9-a474-e8fff3cc9e9c/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample