./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i -s /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash cbc7a588e1092d0916f2339b4d4b9e0fa8415335 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 00:56:30,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 00:56:30,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 00:56:30,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 00:56:30,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 00:56:30,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 00:56:30,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 00:56:30,964 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 00:56:30,966 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 00:56:30,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 00:56:30,969 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 00:56:30,970 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 00:56:30,971 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 00:56:30,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 00:56:30,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 00:56:30,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 00:56:30,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 00:56:30,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 00:56:30,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 00:56:30,983 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 00:56:30,985 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 00:56:30,992 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 00:56:30,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 00:56:30,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 00:56:31,006 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 00:56:31,013 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 00:56:31,014 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 00:56:31,015 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 00:56:31,016 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 00:56:31,017 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 00:56:31,018 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 00:56:31,019 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 00:56:31,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 00:56:31,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 00:56:31,025 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 00:56:31,025 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 00:56:31,027 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 00:56:31,028 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 00:56:31,028 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 00:56:31,029 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 00:56:31,030 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 00:56:31,033 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-11-30 00:56:31,066 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 00:56:31,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 00:56:31,068 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 00:56:31,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 00:56:31,069 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 00:56:31,069 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 00:56:31,069 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 00:56:31,069 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 00:56:31,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 00:56:31,070 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 00:56:31,070 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 00:56:31,070 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 00:56:31,070 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 00:56:31,071 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 00:56:31,071 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 00:56:31,071 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 00:56:31,071 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 00:56:31,071 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 00:56:31,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 00:56:31,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 00:56:31,072 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 00:56:31,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 00:56:31,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:56:31,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 00:56:31,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 00:56:31,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 00:56:31,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 00:56:31,074 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 00:56:31,074 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-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cbc7a588e1092d0916f2339b4d4b9e0fa8415335 [2020-11-30 00:56:31,414 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 00:56:31,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 00:56:31,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 00:56:31,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 00:56:31,467 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 00:56:31,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/../../sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-11-30 00:56:31,540 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/data/edfb5e3ae/ec6a590eb8ec464a844fe8b8e50ff2ff/FLAG97daa264d [2020-11-30 00:56:32,121 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 00:56:32,122 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/sv-benchmarks/c/list-ext-properties/960521-1_1-3.i [2020-11-30 00:56:32,141 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/data/edfb5e3ae/ec6a590eb8ec464a844fe8b8e50ff2ff/FLAG97daa264d [2020-11-30 00:56:32,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/data/edfb5e3ae/ec6a590eb8ec464a844fe8b8e50ff2ff [2020-11-30 00:56:32,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 00:56:32,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-30 00:56:32,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 00:56:32,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 00:56:32,402 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 00:56:32,403 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:32,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@453ec987 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32, skipping insertion in model container [2020-11-30 00:56:32,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:32,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 00:56:32,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 00:56:32,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:56:32,899 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 00:56:32,935 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 00:56:32,986 INFO L208 MainTranslator]: Completed translation [2020-11-30 00:56:32,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32 WrapperNode [2020-11-30 00:56:32,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 00:56:32,988 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 00:56:32,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 00:56:32,989 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 00:56:33,001 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... [2020-11-30 00:56:33,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 00:56:33,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 00:56:33,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 00:56:33,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 00:56:33,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 00:56:33,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-30 00:56:33,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 00:56:33,135 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-30 00:56:33,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-30 00:56:33,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-30 00:56:33,135 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-11-30 00:56:33,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-11-30 00:56:33,137 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-11-30 00:56:33,137 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2020-11-30 00:56:33,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-30 00:56:33,138 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-30 00:56:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-30 00:56:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-30 00:56:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-30 00:56:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-30 00:56:33,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 00:56:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-30 00:56:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-30 00:56:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-30 00:56:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-30 00:56:33,142 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-30 00:56:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-30 00:56:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-30 00:56:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-30 00:56:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-30 00:56:33,143 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-30 00:56:33,144 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-30 00:56:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-30 00:56:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-30 00:56:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-11-30 00:56:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-11-30 00:56:33,145 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-11-30 00:56:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-30 00:56:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-30 00:56:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-30 00:56:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-30 00:56:33,146 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-30 00:56:33,147 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-30 00:56:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-30 00:56:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-30 00:56:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-30 00:56:33,148 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-30 00:56:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-30 00:56:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-30 00:56:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-30 00:56:33,149 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-30 00:56:33,150 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-30 00:56:33,150 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-30 00:56:33,150 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-30 00:56:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-30 00:56:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-30 00:56:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-30 00:56:33,151 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-30 00:56:33,152 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-30 00:56:33,153 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-30 00:56:33,153 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-30 00:56:33,154 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-30 00:56:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-30 00:56:33,155 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-30 00:56:33,156 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-30 00:56:33,157 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-30 00:56:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-30 00:56:33,158 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-30 00:56:33,159 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-30 00:56:33,160 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-30 00:56:33,161 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-30 00:56:33,162 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-30 00:56:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-30 00:56:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-30 00:56:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-30 00:56:33,163 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-30 00:56:33,164 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 00:56:33,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 00:56:33,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-30 00:56:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 00:56:33,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 00:56:33,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 00:56:33,940 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-30 00:56:33,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:56:33 BoogieIcfgContainer [2020-11-30 00:56:33,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 00:56:33,947 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 00:56:33,948 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 00:56:33,952 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 00:56:33,953 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 12:56:32" (1/3) ... [2020-11-30 00:56:33,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243ca80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:56:33, skipping insertion in model container [2020-11-30 00:56:33,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 12:56:32" (2/3) ... [2020-11-30 00:56:33,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@243ca80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 12:56:33, skipping insertion in model container [2020-11-30 00:56:33,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:56:33" (3/3) ... [2020-11-30 00:56:33,967 INFO L111 eAbstractionObserver]: Analyzing ICFG 960521-1_1-3.i [2020-11-30 00:56:33,984 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 00:56:33,990 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-11-30 00:56:34,003 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-11-30 00:56:34,038 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 00:56:34,038 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 00:56:34,038 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 00:56:34,039 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 00:56:34,039 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 00:56:34,039 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 00:56:34,039 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 00:56:34,040 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 00:56:34,067 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-11-30 00:56:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 00:56:34,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:34,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:34,081 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:34,091 INFO L82 PathProgramCache]: Analyzing trace with hash -334073084, now seen corresponding path program 1 times [2020-11-30 00:56:34,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:34,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434515905] [2020-11-30 00:56:34,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:34,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:34,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:34,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:34,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434515905] [2020-11-30 00:56:34,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:34,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:56:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412141858] [2020-11-30 00:56:34,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 00:56:34,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:34,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 00:56:34,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 00:56:34,406 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 3 states. [2020-11-30 00:56:34,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:34,779 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2020-11-30 00:56:34,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 00:56:34,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 00:56:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:34,796 INFO L225 Difference]: With dead ends: 62 [2020-11-30 00:56:34,797 INFO L226 Difference]: Without dead ends: 59 [2020-11-30 00:56:34,799 INFO L677 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 [2020-11-30 00:56:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-30 00:56:34,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-11-30 00:56:34,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 00:56:34,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-11-30 00:56:34,840 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 9 [2020-11-30 00:56:34,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:34,840 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-11-30 00:56:34,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 00:56:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-11-30 00:56:34,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:56:34,841 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:34,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:34,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 00:56:34,842 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:34,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:34,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545344, now seen corresponding path program 1 times [2020-11-30 00:56:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:34,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260343033] [2020-11-30 00:56:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:34,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:34,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260343033] [2020-11-30 00:56:34,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:34,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:56:34,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771169472] [2020-11-30 00:56:35,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:56:35,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:35,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:56:35,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:56:35,001 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 4 states. [2020-11-30 00:56:35,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:35,260 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2020-11-30 00:56:35,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 00:56:35,260 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 00:56:35,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:35,261 INFO L225 Difference]: With dead ends: 58 [2020-11-30 00:56:35,262 INFO L226 Difference]: Without dead ends: 58 [2020-11-30 00:56:35,262 INFO L677 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 [2020-11-30 00:56:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-30 00:56:35,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-11-30 00:56:35,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-30 00:56:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2020-11-30 00:56:35,270 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 10 [2020-11-30 00:56:35,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:35,270 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2020-11-30 00:56:35,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:56:35,271 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2020-11-30 00:56:35,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 00:56:35,271 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:35,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:35,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 00:56:35,272 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1766545343, now seen corresponding path program 1 times [2020-11-30 00:56:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:35,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299315414] [2020-11-30 00:56:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:35,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:35,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:35,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299315414] [2020-11-30 00:56:35,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:35,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:56:35,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883347140] [2020-11-30 00:56:35,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:56:35,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:35,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:56:35,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:56:35,482 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand 5 states. [2020-11-30 00:56:35,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:35,793 INFO L93 Difference]: Finished difference Result 109 states and 115 transitions. [2020-11-30 00:56:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:56:35,794 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-11-30 00:56:35,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:35,796 INFO L225 Difference]: With dead ends: 109 [2020-11-30 00:56:35,796 INFO L226 Difference]: Without dead ends: 109 [2020-11-30 00:56:35,796 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 00:56:35,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-30 00:56:35,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-30 00:56:35,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-30 00:56:35,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-11-30 00:56:35,805 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 10 [2020-11-30 00:56:35,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:35,806 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-11-30 00:56:35,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:56:35,806 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-11-30 00:56:35,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-30 00:56:35,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:35,807 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:35,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 00:56:35,807 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:35,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:35,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1136421434, now seen corresponding path program 1 times [2020-11-30 00:56:35,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:35,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738613411] [2020-11-30 00:56:35,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:35,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:35,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:35,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738613411] [2020-11-30 00:56:35,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484129495] [2020-11-30 00:56:35,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:36,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 00:56:36,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:36,364 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-30 00:56:36,364 INFO L384 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-11-30 00:56:36,365 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:56:36,391 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:56:36,405 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:56:36,405 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:29 [2020-11-30 00:56:36,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:36,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:56:36,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2020-11-30 00:56:36,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919722835] [2020-11-30 00:56:36,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:56:36,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:36,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:56:36,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-30 00:56:36,445 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 5 states. [2020-11-30 00:56:36,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:36,583 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-11-30 00:56:36,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:56:36,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-11-30 00:56:36,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:36,587 INFO L225 Difference]: With dead ends: 108 [2020-11-30 00:56:36,587 INFO L226 Difference]: Without dead ends: 108 [2020-11-30 00:56:36,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:56:36,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-30 00:56:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2020-11-30 00:56:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-30 00:56:36,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-11-30 00:56:36,595 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 12 [2020-11-30 00:56:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:36,595 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-11-30 00:56:36,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:56:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-11-30 00:56:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 00:56:36,596 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:36,596 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:36,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:36,819 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:36,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:36,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184100, now seen corresponding path program 1 times [2020-11-30 00:56:36,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:36,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375998970] [2020-11-30 00:56:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:36,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:36,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:36,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:36,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375998970] [2020-11-30 00:56:36,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:36,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 00:56:36,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327988592] [2020-11-30 00:56:36,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 00:56:36,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:36,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 00:56:36,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 00:56:36,957 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 4 states. [2020-11-30 00:56:37,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:37,171 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2020-11-30 00:56:37,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:56:37,171 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-30 00:56:37,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:37,172 INFO L225 Difference]: With dead ends: 54 [2020-11-30 00:56:37,172 INFO L226 Difference]: Without dead ends: 54 [2020-11-30 00:56:37,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:56:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-30 00:56:37,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-11-30 00:56:37,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 00:56:37,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2020-11-30 00:56:37,178 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 15 [2020-11-30 00:56:37,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:37,179 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2020-11-30 00:56:37,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 00:56:37,179 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2020-11-30 00:56:37,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 00:56:37,179 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:37,179 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:37,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 00:56:37,180 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:37,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:37,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1785184099, now seen corresponding path program 1 times [2020-11-30 00:56:37,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:37,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799878455] [2020-11-30 00:56:37,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:37,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799878455] [2020-11-30 00:56:37,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:37,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:56:37,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276338761] [2020-11-30 00:56:37,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:56:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:56:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:56:37,294 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand 6 states. [2020-11-30 00:56:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:37,753 INFO L93 Difference]: Finished difference Result 99 states and 104 transitions. [2020-11-30 00:56:37,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:56:37,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-11-30 00:56:37,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:37,755 INFO L225 Difference]: With dead ends: 99 [2020-11-30 00:56:37,755 INFO L226 Difference]: Without dead ends: 99 [2020-11-30 00:56:37,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:56:37,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-30 00:56:37,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 74. [2020-11-30 00:56:37,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-30 00:56:37,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 83 transitions. [2020-11-30 00:56:37,770 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 83 transitions. Word has length 15 [2020-11-30 00:56:37,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:37,771 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 83 transitions. [2020-11-30 00:56:37,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:56:37,771 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 83 transitions. [2020-11-30 00:56:37,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 00:56:37,772 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:37,772 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:37,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 00:56:37,772 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:37,773 INFO L82 PathProgramCache]: Analyzing trace with hash 139066936, now seen corresponding path program 1 times [2020-11-30 00:56:37,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:37,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199494904] [2020-11-30 00:56:37,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:37,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:37,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199494904] [2020-11-30 00:56:37,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632159587] [2020-11-30 00:56:37,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:56:38,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:38,142 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-30 00:56:38,143 INFO L384 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-11-30 00:56:38,143 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:56:38,159 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:56:38,164 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:56:38,164 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-30 00:56:38,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:38,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:56:38,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-30 00:56:38,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129724152] [2020-11-30 00:56:38,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:56:38,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:38,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:56:38,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 00:56:38,245 INFO L87 Difference]: Start difference. First operand 74 states and 83 transitions. Second operand 6 states. [2020-11-30 00:56:38,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:38,432 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-11-30 00:56:38,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 00:56:38,433 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-11-30 00:56:38,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:38,434 INFO L225 Difference]: With dead ends: 104 [2020-11-30 00:56:38,434 INFO L226 Difference]: Without dead ends: 104 [2020-11-30 00:56:38,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:56:38,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-30 00:56:38,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-11-30 00:56:38,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 00:56:38,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2020-11-30 00:56:38,442 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 17 [2020-11-30 00:56:38,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:38,442 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2020-11-30 00:56:38,442 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:56:38,442 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2020-11-30 00:56:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 00:56:38,443 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:38,443 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:38,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:38,667 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:38,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:38,668 INFO L82 PathProgramCache]: Analyzing trace with hash -2134408578, now seen corresponding path program 1 times [2020-11-30 00:56:38,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:38,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136251916] [2020-11-30 00:56:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:38,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:38,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:38,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136251916] [2020-11-30 00:56:38,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454480486] [2020-11-30 00:56:38,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:38,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:38,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 00:56:38,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:38,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:38,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:56:38,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-11-30 00:56:38,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802293217] [2020-11-30 00:56:38,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:56:38,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:38,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:56:38,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:56:38,990 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand 5 states. [2020-11-30 00:56:39,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:39,065 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2020-11-30 00:56:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 00:56:39,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-11-30 00:56:39,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:39,066 INFO L225 Difference]: With dead ends: 97 [2020-11-30 00:56:39,066 INFO L226 Difference]: Without dead ends: 97 [2020-11-30 00:56:39,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:56:39,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-30 00:56:39,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-11-30 00:56:39,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-30 00:56:39,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-11-30 00:56:39,073 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 18 [2020-11-30 00:56:39,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:39,074 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-11-30 00:56:39,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:56:39,074 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-11-30 00:56:39,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 00:56:39,075 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:39,075 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:39,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:39,276 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:39,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:39,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1700324605, now seen corresponding path program 1 times [2020-11-30 00:56:39,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:39,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402240300] [2020-11-30 00:56:39,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:39,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:39,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:39,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:39,453 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:39,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402240300] [2020-11-30 00:56:39,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745361460] [2020-11-30 00:56:39,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:39,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 00:56:39,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:39,637 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-30 00:56:39,638 INFO L384 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-11-30 00:56:39,638 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:56:39,651 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:56:39,655 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:56:39,655 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:35 [2020-11-30 00:56:39,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:39,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:56:39,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2020-11-30 00:56:39,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306462878] [2020-11-30 00:56:39,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 00:56:39,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:39,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 00:56:39,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:56:39,772 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 12 states. [2020-11-30 00:56:40,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:40,491 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2020-11-30 00:56:40,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 00:56:40,491 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2020-11-30 00:56:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:40,494 INFO L225 Difference]: With dead ends: 112 [2020-11-30 00:56:40,494 INFO L226 Difference]: Without dead ends: 112 [2020-11-30 00:56:40,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-11-30 00:56:40,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-30 00:56:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 73. [2020-11-30 00:56:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-30 00:56:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2020-11-30 00:56:40,501 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 20 [2020-11-30 00:56:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:40,502 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2020-11-30 00:56:40,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 00:56:40,502 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2020-11-30 00:56:40,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:56:40,503 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:40,503 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:40,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:40,704 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash -247582013, now seen corresponding path program 1 times [2020-11-30 00:56:40,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:40,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188343492] [2020-11-30 00:56:40,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:40,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:40,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 00:56:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:56:40,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188343492] [2020-11-30 00:56:40,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:40,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:56:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434717523] [2020-11-30 00:56:40,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:56:40,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:40,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:56:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:56:40,827 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 6 states. [2020-11-30 00:56:41,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:41,178 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2020-11-30 00:56:41,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 00:56:41,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-30 00:56:41,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:41,179 INFO L225 Difference]: With dead ends: 71 [2020-11-30 00:56:41,179 INFO L226 Difference]: Without dead ends: 71 [2020-11-30 00:56:41,179 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:56:41,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-30 00:56:41,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-11-30 00:56:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-30 00:56:41,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-11-30 00:56:41,187 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 22 [2020-11-30 00:56:41,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:41,187 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-11-30 00:56:41,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:56:41,187 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-11-30 00:56:41,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 00:56:41,188 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:41,188 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:41,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-30 00:56:41,188 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:41,189 INFO L82 PathProgramCache]: Analyzing trace with hash -247582012, now seen corresponding path program 1 times [2020-11-30 00:56:41,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:41,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768048421] [2020-11-30 00:56:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:41,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:41,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:41,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 00:56:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:41,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:56:41,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768048421] [2020-11-30 00:56:41,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:41,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 00:56:41,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661381717] [2020-11-30 00:56:41,316 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 00:56:41,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:41,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 00:56:41,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 00:56:41,317 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 6 states. [2020-11-30 00:56:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:41,668 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2020-11-30 00:56:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 00:56:41,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-11-30 00:56:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:41,669 INFO L225 Difference]: With dead ends: 74 [2020-11-30 00:56:41,669 INFO L226 Difference]: Without dead ends: 74 [2020-11-30 00:56:41,670 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-11-30 00:56:41,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-30 00:56:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 61. [2020-11-30 00:56:41,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-30 00:56:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-11-30 00:56:41,673 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 22 [2020-11-30 00:56:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:41,673 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-11-30 00:56:41,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 00:56:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-11-30 00:56:41,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 00:56:41,674 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:41,674 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:41,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-30 00:56:41,675 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:41,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:41,675 INFO L82 PathProgramCache]: Analyzing trace with hash 474007128, now seen corresponding path program 2 times [2020-11-30 00:56:41,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:41,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158606154] [2020-11-30 00:56:41,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:41,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 00:56:41,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158606154] [2020-11-30 00:56:41,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182109857] [2020-11-30 00:56:41,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:41,955 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-30 00:56:41,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 00:56:41,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-30 00:56:41,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:41,984 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-30 00:56:41,984 INFO L384 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-11-30 00:56:41,985 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:56:41,991 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:56:41,992 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:56:41,992 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:18 [2020-11-30 00:56:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 00:56:42,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-30 00:56:42,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 13 [2020-11-30 00:56:42,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871736664] [2020-11-30 00:56:42,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 00:56:42,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:42,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 00:56:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-11-30 00:56:42,158 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 13 states. [2020-11-30 00:56:43,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:43,654 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2020-11-30 00:56:43,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-30 00:56:43,654 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 23 [2020-11-30 00:56:43,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:43,655 INFO L225 Difference]: With dead ends: 120 [2020-11-30 00:56:43,655 INFO L226 Difference]: Without dead ends: 120 [2020-11-30 00:56:43,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-30 00:56:43,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-11-30 00:56:43,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 80. [2020-11-30 00:56:43,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-11-30 00:56:43,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-11-30 00:56:43,661 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 23 [2020-11-30 00:56:43,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:43,661 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-11-30 00:56:43,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 00:56:43,662 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-11-30 00:56:43,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:56:43,671 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:43,672 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:43,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-30 00:56:43,895 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1256876169, now seen corresponding path program 1 times [2020-11-30 00:56:43,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:43,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259514367] [2020-11-30 00:56:43,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:43,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:43,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-11-30 00:56:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 00:56:43,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259514367] [2020-11-30 00:56:43,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 00:56:43,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 00:56:43,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351608681] [2020-11-30 00:56:43,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 00:56:43,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:43,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 00:56:43,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 00:56:43,998 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 5 states. [2020-11-30 00:56:44,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:44,213 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2020-11-30 00:56:44,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:56:44,213 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-11-30 00:56:44,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:44,214 INFO L225 Difference]: With dead ends: 78 [2020-11-30 00:56:44,214 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 00:56:44,214 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 00:56:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 00:56:44,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-30 00:56:44,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 00:56:44,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-30 00:56:44,219 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 25 [2020-11-30 00:56:44,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:44,219 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-30 00:56:44,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 00:56:44,219 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-30 00:56:44,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 00:56:44,220 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:44,220 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:44,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-30 00:56:44,221 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:44,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:44,221 INFO L82 PathProgramCache]: Analyzing trace with hash 254265955, now seen corresponding path program 1 times [2020-11-30 00:56:44,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:44,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008129371] [2020-11-30 00:56:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:44,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-30 00:56:44,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:44,339 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:56:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008129371] [2020-11-30 00:56:44,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523452291] [2020-11-30 00:56:44,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 00:56:44,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-30 00:56:44,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 00:56:44,495 INFO L350 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2020-11-30 00:56:44,496 INFO L384 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 1 case distinctions, treesize of input 13 treesize of output 15 [2020-11-30 00:56:44,496 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 00:56:44,509 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 00:56:44,512 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 00:56:44,512 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:25, output treesize:34 [2020-11-30 00:56:44,583 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 00:56:44,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-30 00:56:44,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 10 [2020-11-30 00:56:44,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812398101] [2020-11-30 00:56:44,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-30 00:56:44,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 00:56:44,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-30 00:56:44,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-30 00:56:44,585 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 7 states. [2020-11-30 00:56:44,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 00:56:44,768 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2020-11-30 00:56:44,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 00:56:44,769 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-11-30 00:56:44,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 00:56:44,770 INFO L225 Difference]: With dead ends: 90 [2020-11-30 00:56:44,770 INFO L226 Difference]: Without dead ends: 90 [2020-11-30 00:56:44,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-11-30 00:56:44,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-30 00:56:44,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-30 00:56:44,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 00:56:44,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2020-11-30 00:56:44,774 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 25 [2020-11-30 00:56:44,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 00:56:44,774 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2020-11-30 00:56:44,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-30 00:56:44,774 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2020-11-30 00:56:44,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 00:56:44,776 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 00:56:44,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 00:56:44,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 00:56:44,976 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, fooErr1REQUIRES_VIOLATION, fooErr0REQUIRES_VIOLATION, fooErr2REQUIRES_VIOLATION, fooErr3REQUIRES_VIOLATION, mainErr14ASSERT_VIOLATIONMEMORY_FREE, mainErr13ASSERT_VIOLATIONMEMORY_FREE, mainErr12ASSERT_VIOLATIONMEMORY_FREE, mainErr15ASSERT_VIOLATIONMEMORY_FREE, mainErr2REQUIRES_VIOLATION, mainErr10ASSERT_VIOLATIONMEMORY_FREE, mainErr3REQUIRES_VIOLATION, mainErr11ASSERT_VIOLATIONMEMORY_FREE, mainErr5ASSERT_VIOLATIONMEMORY_FREE, mainErr8ASSERT_VIOLATIONMEMORY_FREE, mainErr16ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr9ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION, mainErr6ASSERT_VIOLATIONMEMORY_FREE, mainErr7ASSERT_VIOLATIONMEMORY_FREE]=== [2020-11-30 00:56:44,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 00:56:44,977 INFO L82 PathProgramCache]: Analyzing trace with hash -972185287, now seen corresponding path program 1 times [2020-11-30 00:56:44,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 00:56:44,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232094798] [2020-11-30 00:56:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 00:56:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:56:45,004 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:56:45,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 00:56:45,019 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 00:56:45,049 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 00:56:45,050 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 00:56:45,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-30 00:56:45,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 12:56:45 BoogieIcfgContainer [2020-11-30 00:56:45,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 00:56:45,090 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 00:56:45,090 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 00:56:45,090 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 00:56:45,091 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 12:56:33" (3/4) ... [2020-11-30 00:56:45,092 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 00:56:45,137 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_dde0a7bd-5518-41d4-9edc-0d20fbb86a0d/bin/uautomizer/witness.graphml [2020-11-30 00:56:45,138 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 00:56:45,139 INFO L168 Benchmark]: Toolchain (without parser) took 12741.91 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 63.6 MB in the beginning and 125.7 MB in the end (delta: -62.1 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,139 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 98.6 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 00:56:45,139 INFO L168 Benchmark]: CACSL2BoogieTranslator took 589.50 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 63.8 MB in the end (delta: -318.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,140 INFO L168 Benchmark]: Boogie Preprocessor took 60.72 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 61.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,140 INFO L168 Benchmark]: RCFGBuilder took 893.26 ms. Allocated memory is still 98.6 MB. Free memory was 61.1 MB in the beginning and 55.0 MB in the end (delta: 6.1 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,141 INFO L168 Benchmark]: TraceAbstraction took 11142.37 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 54.2 MB in the beginning and 128.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 395.1 kB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,141 INFO L168 Benchmark]: Witness Printer took 47.68 ms. Allocated memory is still 174.1 MB. Free memory was 128.9 MB in the beginning and 125.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 00:56:45,143 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 98.6 MB. Free memory was 71.1 MB in the beginning and 71.0 MB in the end (delta: 25.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 589.50 ms. Allocated memory is still 98.6 MB. Free memory was 63.4 MB in the beginning and 63.8 MB in the end (delta: -318.0 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 60.72 ms. Allocated memory is still 98.6 MB. Free memory was 63.8 MB in the beginning and 61.1 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 893.26 ms. Allocated memory is still 98.6 MB. Free memory was 61.1 MB in the beginning and 55.0 MB in the end (delta: 6.1 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11142.37 ms. Allocated memory was 98.6 MB in the beginning and 174.1 MB in the end (delta: 75.5 MB). Free memory was 54.2 MB in the beginning and 128.9 MB in the end (delta: -74.7 MB). Peak memory consumption was 395.1 kB. Max. memory is 16.1 GB. * Witness Printer took 47.68 ms. Allocated memory is still 174.1 MB. Free memory was 128.9 MB in the beginning and 125.7 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 547]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L523] int *a, *b; [L524] int n; VAL [\old(a)=56, \old(a)=53, \old(b)=50, \old(b)=57, \old(n)=55, a={0:0}, b={0:0}, n=0] [L536] n = 1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={0:0}, b={0:0}, n=1] [L537] COND FALSE !(__VERIFIER_nondet_int() && n < 30) [L540] a = malloc(n * sizeof(*a)) [L541] b = malloc(n * sizeof(*b)) [L542] EXPR b++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L542] *b++ = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b++={-2:0}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L543] CALL foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, n=1] [L528] int i; [L529] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L529] COND TRUE i < n VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L530] a[i] = -1 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L529] i++ VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L529] COND FALSE !(i < n) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=1, n=1] [L531] i = 0 VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L531] COND FALSE !(i < n - 1) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, i=0, n=1] [L543] RET foo() VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] b[-1] VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, b[-1]=0, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L544] COND FALSE !(b[-1]) [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L547] free(a) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] [L547] free(a) [L547] free(b) VAL [\old(a)=0, \old(a)=0, \old(b)=0, \old(b)=0, \old(n)=0, a={1:0}, b={-2:4}, malloc(n * sizeof(*a))={1:0}, malloc(n * sizeof(*b))={-2:0}, n=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 82 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 11.0s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 671 SDtfs, 1231 SDslu, 955 SDs, 0 SdLazy, 1689 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 254 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 3.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=80occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 288 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 385 NumberOfCodeBlocks, 385 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 338 ConstructedInterpolants, 0 QuantifiedInterpolants, 44965 SizeOfPredicates, 27 NumberOfNonLiveVariables, 1011 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 20 InterpolantComputations, 12 PerfectInterpolantSequences, 34/55 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 proved your program to be incorrect! Received shutdown request...