./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC --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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:21:53,175 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:21:53,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:21:53,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:21:53,214 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:21:53,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:21:53,217 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:21:53,220 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:21:53,222 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:21:53,224 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:21:53,225 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:21:53,227 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:21:53,227 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:21:53,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:21:53,230 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:21:53,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:21:53,233 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:21:53,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:21:53,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:21:53,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:21:53,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:21:53,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:21:53,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:21:53,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:21:53,248 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:21:53,249 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:21:53,249 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:21:53,250 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:21:53,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:21:53,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:21:53,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:21:53,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:21:53,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:21:53,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:21:53,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:21:53,267 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:21:53,267 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:21:53,267 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:21:53,268 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:21:53,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:21:53,269 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:21:53,270 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-10-11 00:21:53,294 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:21:53,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:21:53,295 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:21:53,295 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:21:53,296 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:21:53,296 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:21:53,296 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:21:53,296 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 00:21:53,296 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:21:53,296 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:21:53,297 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 00:21:53,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:21:53,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:21:53,298 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:21:53,298 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:21:53,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:21:53,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:21:53,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:21:53,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:21:53,299 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:21:53,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:21:53,300 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:21:53,300 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2021-10-11 00:21:53,617 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:21:53,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:21:53,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:21:53,672 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:21:53,673 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:21:53,674 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-11 00:21:53,757 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/data/6ed1c46e3/b12fc53965f347a1b4106b2386e2da70/FLAG94d7ecf8b [2021-10-11 00:21:54,209 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:21:54,209 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-11 00:21:54,215 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/data/6ed1c46e3/b12fc53965f347a1b4106b2386e2da70/FLAG94d7ecf8b [2021-10-11 00:21:54,601 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/data/6ed1c46e3/b12fc53965f347a1b4106b2386e2da70 [2021-10-11 00:21:54,604 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:21:54,605 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-10-11 00:21:54,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:21:54,607 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:21:54,610 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:21:54,611 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,613 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ce2c91e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54, skipping insertion in model container [2021-10-11 00:21:54,613 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:21:54,633 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:21:54,835 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:21:54,847 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:21:54,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:21:54,884 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:21:54,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54 WrapperNode [2021-10-11 00:21:54,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:21:54,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:21:54,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:21:54,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:21:54,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,901 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,911 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,911 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,933 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,940 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... [2021-10-11 00:21:54,942 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:21:54,944 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:21:54,944 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:21:54,944 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:21:54,945 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-10-11 00:21:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:21:55,028 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-10-11 00:21:55,028 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-10-11 00:21:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-10-11 00:21:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-10-11 00:21:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 00:21:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 00:21:55,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 00:21:55,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-10-11 00:21:55,030 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:21:55,030 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 00:21:55,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:21:55,229 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-10-11 00:21:55,231 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:21:55 BoogieIcfgContainer [2021-10-11 00:21:55,231 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:21:55,233 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:21:55,233 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:21:55,245 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:21:55,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:21:54" (1/3) ... [2021-10-11 00:21:55,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55080f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:21:55, skipping insertion in model container [2021-10-11 00:21:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:21:54" (2/3) ... [2021-10-11 00:21:55,247 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55080f5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:21:55, skipping insertion in model container [2021-10-11 00:21:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:21:55" (3/3) ... [2021-10-11 00:21:55,249 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2021-10-11 00:21:55,266 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:21:55,274 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-10-11 00:21:55,285 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-11 00:21:55,302 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:21:55,303 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 00:21:55,303 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:21:55,303 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:21:55,303 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:21:55,303 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:21:55,303 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:21:55,303 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:21:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2021-10-11 00:21:55,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:21:55,322 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:55,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:55,323 INFO L429 AbstractCegarLoop]: === Iteration 1 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:55,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:55,329 INFO L82 PathProgramCache]: Analyzing trace with hash 868112163, now seen corresponding path program 1 times [2021-10-11 00:21:55,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:55,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834499471] [2021-10-11 00:21:55,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:55,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:55,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:55,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834499471] [2021-10-11 00:21:55,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:21:55,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:21:55,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268996578] [2021-10-11 00:21:55,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:21:55,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:55,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:21:55,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:21:55,597 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 4 states. [2021-10-11 00:21:55,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:55,765 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-10-11 00:21:55,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:21:55,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 00:21:55,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:55,777 INFO L225 Difference]: With dead ends: 29 [2021-10-11 00:21:55,777 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 00:21:55,786 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 [2021-10-11 00:21:55,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 00:21:55,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-10-11 00:21:55,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:21:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-11 00:21:55,816 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 8 [2021-10-11 00:21:55,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:55,816 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-11 00:21:55,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:21:55,816 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-11 00:21:55,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:21:55,817 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:55,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:55,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:21:55,818 INFO L429 AbstractCegarLoop]: === Iteration 2 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:55,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:55,819 INFO L82 PathProgramCache]: Analyzing trace with hash 868112162, now seen corresponding path program 1 times [2021-10-11 00:21:55,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:55,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880389118] [2021-10-11 00:21:55,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:55,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:55,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:55,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880389118] [2021-10-11 00:21:55,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:21:55,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:21:55,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538674105] [2021-10-11 00:21:55,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:21:55,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:55,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:21:55,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:21:55,917 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 4 states. [2021-10-11 00:21:56,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:56,011 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2021-10-11 00:21:56,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:21:56,012 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2021-10-11 00:21:56,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:56,014 INFO L225 Difference]: With dead ends: 30 [2021-10-11 00:21:56,015 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 00:21:56,016 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 [2021-10-11 00:21:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 00:21:56,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2021-10-11 00:21:56,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 00:21:56,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-10-11 00:21:56,026 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 8 [2021-10-11 00:21:56,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:56,027 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-10-11 00:21:56,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:21:56,028 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-10-11 00:21:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:21:56,029 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:56,030 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:56,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:21:56,034 INFO L429 AbstractCegarLoop]: === Iteration 3 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash -258436314, now seen corresponding path program 1 times [2021-10-11 00:21:56,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:56,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533069344] [2021-10-11 00:21:56,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:56,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:56,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533069344] [2021-10-11 00:21:56,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149039632] [2021-10-11 00:21:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 00:21:56,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:21:56,361 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 00:21:56,362 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 00:21:56,371 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 00:21:56,375 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 00:21:56,375 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 00:21:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:56,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:21:56,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3] total 6 [2021-10-11 00:21:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261702065] [2021-10-11 00:21:56,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:21:56,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:56,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:21:56,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:21:56,445 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 7 states. [2021-10-11 00:21:56,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:56,559 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2021-10-11 00:21:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:21:56,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-10-11 00:21:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:56,562 INFO L225 Difference]: With dead ends: 30 [2021-10-11 00:21:56,562 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 00:21:56,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:21:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 00:21:56,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-11 00:21:56,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-10-11 00:21:56,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-10-11 00:21:56,579 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 12 [2021-10-11 00:21:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:56,579 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-10-11 00:21:56,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:21:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-10-11 00:21:56,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-11 00:21:56,583 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:56,583 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:56,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:21:56,810 INFO L429 AbstractCegarLoop]: === Iteration 4 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1666776813, now seen corresponding path program 1 times [2021-10-11 00:21:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615665321] [2021-10-11 00:21:56,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,884 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:56,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615665321] [2021-10-11 00:21:56,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943200515] [2021-10-11 00:21:56,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:56,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:21:56,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:21:56,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:56,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:21:56,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-10-11 00:21:56,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681069767] [2021-10-11 00:21:56,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:21:56,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:56,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:21:56,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:21:56,999 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 7 states. [2021-10-11 00:21:57,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:57,053 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-10-11 00:21:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:21:57,053 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2021-10-11 00:21:57,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:57,054 INFO L225 Difference]: With dead ends: 33 [2021-10-11 00:21:57,054 INFO L226 Difference]: Without dead ends: 33 [2021-10-11 00:21:57,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:21:57,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-11 00:21:57,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-11 00:21:57,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:21:57,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-11 00:21:57,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 19 [2021-10-11 00:21:57,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:57,060 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-11 00:21:57,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:21:57,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-11 00:21:57,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-11 00:21:57,061 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:57,061 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:57,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:21:57,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:57,287 INFO L82 PathProgramCache]: Analyzing trace with hash -242667132, now seen corresponding path program 1 times [2021-10-11 00:21:57,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:57,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257531425] [2021-10-11 00:21:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:57,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:57,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257531425] [2021-10-11 00:21:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918871245] [2021-10-11 00:21:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:57,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:21:57,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:21:57,463 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:57,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:21:57,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-10-11 00:21:57,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251153486] [2021-10-11 00:21:57,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:21:57,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:57,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:21:57,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:21:57,466 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 8 states. [2021-10-11 00:21:57,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:57,541 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-10-11 00:21:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:21:57,541 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-10-11 00:21:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:57,545 INFO L225 Difference]: With dead ends: 37 [2021-10-11 00:21:57,545 INFO L226 Difference]: Without dead ends: 37 [2021-10-11 00:21:57,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:21:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-11 00:21:57,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-10-11 00:21:57,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:21:57,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-11 00:21:57,558 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 21 [2021-10-11 00:21:57,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:57,558 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-11 00:21:57,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:21:57,558 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-11 00:21:57,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-11 00:21:57,559 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:57,559 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:57,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:21:57,786 INFO L429 AbstractCegarLoop]: === Iteration 6 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:57,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:57,787 INFO L82 PathProgramCache]: Analyzing trace with hash 130667105, now seen corresponding path program 2 times [2021-10-11 00:21:57,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:57,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942784435] [2021-10-11 00:21:57,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:57,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942784435] [2021-10-11 00:21:57,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316977572] [2021-10-11 00:21:57,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:57,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:21:57,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:21:57,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:21:57,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:21:58,008 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:58,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:21:58,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-10-11 00:21:58,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445728136] [2021-10-11 00:21:58,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:21:58,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:58,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:21:58,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:21:58,010 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 9 states. [2021-10-11 00:21:58,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:58,096 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-11 00:21:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:21:58,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2021-10-11 00:21:58,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:58,099 INFO L225 Difference]: With dead ends: 41 [2021-10-11 00:21:58,099 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 00:21:58,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:21:58,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 00:21:58,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2021-10-11 00:21:58,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-10-11 00:21:58,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-10-11 00:21:58,109 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 25 [2021-10-11 00:21:58,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:58,109 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-10-11 00:21:58,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:21:58,110 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-10-11 00:21:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-11 00:21:58,113 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:58,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:58,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:21:58,334 INFO L429 AbstractCegarLoop]: === Iteration 7 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:58,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:58,335 INFO L82 PathProgramCache]: Analyzing trace with hash -656098114, now seen corresponding path program 3 times [2021-10-11 00:21:58,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:58,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748249232] [2021-10-11 00:21:58,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:58,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:58,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:58,457 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748249232] [2021-10-11 00:21:58,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126680104] [2021-10-11 00:21:58,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/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 [2021-10-11 00:21:58,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-11 00:21:58,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:21:58,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:21:58,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:21:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:21:58,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:21:58,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-10-11 00:21:58,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637510751] [2021-10-11 00:21:58,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:21:58,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:58,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:21:58,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:21:58,596 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand 10 states. [2021-10-11 00:21:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:58,683 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-11 00:21:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:21:58,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 29 [2021-10-11 00:21:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:58,684 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:21:58,684 INFO L226 Difference]: Without dead ends: 44 [2021-10-11 00:21:58,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:21:58,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-11 00:21:58,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-11 00:21:58,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-10-11 00:21:58,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-10-11 00:21:58,689 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 29 [2021-10-11 00:21:58,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:58,689 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-10-11 00:21:58,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:21:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-10-11 00:21:58,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-11 00:21:58,691 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:58,691 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:58,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-11 00:21:58,898 INFO L429 AbstractCegarLoop]: === Iteration 8 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:58,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:58,899 INFO L82 PathProgramCache]: Analyzing trace with hash 851171268, now seen corresponding path program 2 times [2021-10-11 00:21:58,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:58,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872849272] [2021-10-11 00:21:58,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-10-11 00:21:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:21:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-10-11 00:21:58,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872849272] [2021-10-11 00:21:58,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:21:58,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:21:58,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339460775] [2021-10-11 00:21:58,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:21:58,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:21:58,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:21:58,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:21:58,984 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 4 states. [2021-10-11 00:21:59,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:21:59,012 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-10-11 00:21:59,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:21:59,013 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2021-10-11 00:21:59,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:21:59,014 INFO L225 Difference]: With dead ends: 43 [2021-10-11 00:21:59,014 INFO L226 Difference]: Without dead ends: 43 [2021-10-11 00:21:59,015 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 [2021-10-11 00:21:59,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-11 00:21:59,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-11 00:21:59,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-10-11 00:21:59,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-10-11 00:21:59,019 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 31 [2021-10-11 00:21:59,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:21:59,019 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-10-11 00:21:59,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:21:59,020 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-10-11 00:21:59,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-11 00:21:59,021 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:21:59,021 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:21:59,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-11 00:21:59,021 INFO L429 AbstractCegarLoop]: === Iteration 9 === [mainErr3ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr5ENSURES_VIOLATIONMEMORY_LEAK, mainErr0REQUIRES_VIOLATION, mainErr4ASSERT_VIOLATIONMEMORY_FREE, mainErr1REQUIRES_VIOLATION]=== [2021-10-11 00:21:59,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:21:59,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1037842699, now seen corresponding path program 1 times [2021-10-11 00:21:59,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:21:59,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294747775] [2021-10-11 00:21:59,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:21:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:21:59,042 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:21:59,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 00:21:59,059 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 00:21:59,082 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-11 00:21:59,082 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 00:21:59,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-11 00:21:59,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:21:59 BoogieIcfgContainer [2021-10-11 00:21:59,110 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:21:59,111 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:21:59,111 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:21:59,111 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:21:59,112 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:21:55" (3/4) ... [2021-10-11 00:21:59,114 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 00:21:59,157 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7af5739c-3660-4439-8f8c-17005db627c2/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:21:59,157 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:21:59,158 INFO L168 Benchmark]: Toolchain (without parser) took 4552.77 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 55.1 MB in the beginning and 69.6 MB in the end (delta: -14.6 MB). Peak memory consumption was 8.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:21:59,159 INFO L168 Benchmark]: CDTParser took 0.60 ms. Allocated memory is still 88.1 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:21:59,160 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.36 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 66.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:21:59,160 INFO L168 Benchmark]: Boogie Preprocessor took 55.66 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:21:59,161 INFO L168 Benchmark]: RCFGBuilder took 287.59 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 52.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:21:59,161 INFO L168 Benchmark]: TraceAbstraction took 3877.67 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 52.6 MB in the beginning and 71.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:21:59,162 INFO L168 Benchmark]: Witness Printer took 46.19 ms. Allocated memory is still 111.1 MB. Free memory was 71.7 MB in the beginning and 69.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:21:59,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.60 ms. Allocated memory is still 88.1 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 25.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 279.36 ms. Allocated memory is still 88.1 MB. Free memory was 54.8 MB in the beginning and 66.5 MB in the end (delta: -11.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 55.66 ms. Allocated memory is still 88.1 MB. Free memory was 66.5 MB in the beginning and 65.2 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 287.59 ms. Allocated memory is still 88.1 MB. Free memory was 65.2 MB in the beginning and 52.8 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3877.67 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 52.6 MB in the beginning and 71.7 MB in the end (delta: -19.1 MB). Peak memory consumption was 7.1 MB. Max. memory is 16.1 GB. * Witness Printer took 46.19 ms. Allocated memory is still 111.1 MB. Free memory was 71.7 MB in the beginning and 69.6 MB in the end (delta: 2.1 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: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=0, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=1, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=2, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=3, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND FALSE !(i == 5) VAL [i=4, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] i++ VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L10] COND TRUE i == 5 VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) VAL [i=5, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L11] free(p) [L8] i++ VAL [i=6, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L8] COND TRUE i < 10 VAL [i=6, malloc(10 * sizeof(int))={2:0}, p={2:0}] [L9] p[i] = 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 24 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 101 SDslu, 244 SDs, 0 SdLazy, 380 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 153 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 9 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 294 NumberOfCodeBlocks, 294 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 246 ConstructedInterpolants, 0 QuantifiedInterpolants, 17224 SizeOfPredicates, 2 NumberOfNonLiveVariables, 370 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 55/255 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...