./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/memsafety/cmp-freed-ptr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/memsafety/cmp-freed-ptr.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 3444bab46e3acd40907f623c997f9115bc97543a ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-20ed64e [2021-08-27 05:19:51,055 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 05:19:51,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 05:19:51,093 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 05:19:51,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 05:19:51,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 05:19:51,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 05:19:51,100 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 05:19:51,101 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 05:19:51,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 05:19:51,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 05:19:51,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 05:19:51,103 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 05:19:51,104 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 05:19:51,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 05:19:51,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 05:19:51,120 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 05:19:51,121 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 05:19:51,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 05:19:51,123 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 05:19:51,124 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 05:19:51,125 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 05:19:51,126 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 05:19:51,126 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 05:19:51,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 05:19:51,128 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 05:19:51,128 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 05:19:51,129 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 05:19:51,129 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 05:19:51,130 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 05:19:51,130 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 05:19:51,131 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 05:19:51,131 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 05:19:51,132 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 05:19:51,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 05:19:51,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 05:19:51,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 05:19:51,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 05:19:51,133 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 05:19:51,134 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 05:19:51,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 05:19:51,135 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 05:19:51,150 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 05:19:51,150 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 05:19:51,150 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 05:19:51,150 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 05:19:51,151 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 05:19:51,151 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 05:19:51,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 05:19:51,152 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 05:19:51,153 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 05:19:51,154 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 05:19:51,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 05:19:51,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 05:19:51,154 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 05:19:51,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:19:51,154 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 05:19:51,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 05:19:51,155 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 05:19:51,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 05:19:51,155 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 05:19:51,155 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3444bab46e3acd40907f623c997f9115bc97543a [2021-08-27 05:19:51,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 05:19:51,397 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 05:19:51,399 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 05:19:51,400 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 05:19:51,400 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 05:19:51,401 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-08-27 05:19:51,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979165f19/ae6d1c123188452884d288237bce3f97/FLAG674525df2 [2021-08-27 05:19:51,842 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 05:19:51,843 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/memsafety/cmp-freed-ptr.i [2021-08-27 05:19:51,855 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979165f19/ae6d1c123188452884d288237bce3f97/FLAG674525df2 [2021-08-27 05:19:51,865 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/979165f19/ae6d1c123188452884d288237bce3f97 [2021-08-27 05:19:51,868 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 05:19:51,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 05:19:51,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 05:19:51,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 05:19:51,873 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 05:19:51,874 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:19:51" (1/1) ... [2021-08-27 05:19:51,874 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21539612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:51, skipping insertion in model container [2021-08-27 05:19:51,875 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 05:19:51" (1/1) ... [2021-08-27 05:19:51,879 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 05:19:51,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 05:19:52,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:19:52,156 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 05:19:52,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 05:19:52,206 INFO L208 MainTranslator]: Completed translation [2021-08-27 05:19:52,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52 WrapperNode [2021-08-27 05:19:52,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 05:19:52,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 05:19:52,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 05:19:52,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 05:19:52,215 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,216 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,251 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,256 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,258 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,262 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 05:19:52,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 05:19:52,267 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 05:19:52,267 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 05:19:52,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (1/1) ... [2021-08-27 05:19:52,272 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 05:19:52,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 05:19:52,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 05:19:52,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 05:19:52,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 05:19:52,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 05:19:52,344 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 05:19:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 05:19:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 05:19:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 05:19:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 05:19:52,345 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 05:19:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 05:19:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 05:19:52,345 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 05:19:52,346 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 05:19:52,347 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 05:19:52,348 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 05:19:52,349 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 05:19:52,350 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 05:19:52,351 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 05:19:52,352 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 05:19:52,353 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 05:19:52,354 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 05:19:52,363 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 05:19:52,364 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 05:19:52,365 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 05:19:52,366 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 05:19:52,367 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 05:19:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 05:19:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 05:19:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 05:19:52,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 05:19:52,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 05:19:52,632 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-27 05:19:52,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:19:52 BoogieIcfgContainer [2021-08-27 05:19:52,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 05:19:52,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 05:19:52,645 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 05:19:52,647 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 05:19:52,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 05:19:51" (1/3) ... [2021-08-27 05:19:52,648 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ace3ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:19:52, skipping insertion in model container [2021-08-27 05:19:52,648 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 05:19:52" (2/3) ... [2021-08-27 05:19:52,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ace3ca5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 05:19:52, skipping insertion in model container [2021-08-27 05:19:52,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:19:52" (3/3) ... [2021-08-27 05:19:52,649 INFO L111 eAbstractionObserver]: Analyzing ICFG cmp-freed-ptr.i [2021-08-27 05:19:52,653 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 05:19:52,653 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-08-27 05:19:52,677 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 05:19:52,681 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 05:19:52,681 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-08-27 05:19:52,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 05:19:52,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 05:19:52,693 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:52,693 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:52,694 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:52,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:52,697 INFO L82 PathProgramCache]: Analyzing trace with hash 542822380, now seen corresponding path program 1 times [2021-08-27 05:19:52,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:52,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960310250] [2021-08-27 05:19:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:52,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:52,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:52,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:52,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:52,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960310250] [2021-08-27 05:19:52,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960310250] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:52,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:52,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:52,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892709777] [2021-08-27 05:19:52,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:52,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:52,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:52,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:52,823 INFO L87 Difference]: Start difference. First operand has 30 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 25 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:52,881 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-08-27 05:19:52,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 05:19:52,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-08-27 05:19:52,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:52,886 INFO L225 Difference]: With dead ends: 29 [2021-08-27 05:19:52,887 INFO L226 Difference]: Without dead ends: 26 [2021-08-27 05:19:52,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 05:19:52,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-27 05:19:52,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-27 05:19:52,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 22 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-08-27 05:19:52,914 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 7 [2021-08-27 05:19:52,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:52,914 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-08-27 05:19:52,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:52,914 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-08-27 05:19:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-08-27 05:19:52,915 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:52,915 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:52,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 05:19:52,915 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -352375362, now seen corresponding path program 1 times [2021-08-27 05:19:52,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:52,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050579662] [2021-08-27 05:19:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:52,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:52,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:52,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:52,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:52,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050579662] [2021-08-27 05:19:52,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050579662] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:52,987 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:52,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:52,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177652628] [2021-08-27 05:19:52,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:52,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:52,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:52,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:52,992 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,027 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-08-27 05:19:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:19:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 8 [2021-08-27 05:19:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,029 INFO L225 Difference]: With dead ends: 25 [2021-08-27 05:19:53,029 INFO L226 Difference]: Without dead ends: 25 [2021-08-27 05:19:53,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-27 05:19:53,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-27 05:19:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 21 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-08-27 05:19:53,034 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 8 [2021-08-27 05:19:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,034 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-08-27 05:19:53,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-08-27 05:19:53,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-27 05:19:53,035 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,035 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 05:19:53,036 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1961265710, now seen corresponding path program 1 times [2021-08-27 05:19:53,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589088216] [2021-08-27 05:19:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,037 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:53,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:53,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589088216] [2021-08-27 05:19:53,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589088216] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:53,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:53,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:53,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211480149] [2021-08-27 05:19:53,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:53,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:53,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:53,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,106 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,148 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-08-27 05:19:53,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:19:53,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2021-08-27 05:19:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,149 INFO L225 Difference]: With dead ends: 24 [2021-08-27 05:19:53,150 INFO L226 Difference]: Without dead ends: 24 [2021-08-27 05:19:53,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-27 05:19:53,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-27 05:19:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.5) internal successors, (21), 20 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-08-27 05:19:53,154 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 9 [2021-08-27 05:19:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,154 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-08-27 05:19:53,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-08-27 05:19:53,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 05:19:53,157 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,157 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 05:19:53,158 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr3ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash -714294128, now seen corresponding path program 1 times [2021-08-27 05:19:53,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25699665] [2021-08-27 05:19:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:53,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:53,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25699665] [2021-08-27 05:19:53,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25699665] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:53,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:53,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:53,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715902144] [2021-08-27 05:19:53,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:53,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:53,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:53,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,213 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,258 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-08-27 05:19:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:19:53,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 05:19:53,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,259 INFO L225 Difference]: With dead ends: 22 [2021-08-27 05:19:53,259 INFO L226 Difference]: Without dead ends: 22 [2021-08-27 05:19:53,259 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-27 05:19:53,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-27 05:19:53,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-27 05:19:53,261 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 11 [2021-08-27 05:19:53,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,261 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-27 05:19:53,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,262 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-27 05:19:53,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-27 05:19:53,262 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,262 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 05:19:53,263 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr4ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,263 INFO L82 PathProgramCache]: Analyzing trace with hash -668281437, now seen corresponding path program 1 times [2021-08-27 05:19:53,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,263 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438934322] [2021-08-27 05:19:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,264 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:53,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:53,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:53,299 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438934322] [2021-08-27 05:19:53,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438934322] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:53,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:53,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:53,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174550046] [2021-08-27 05:19:53,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:53,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:53,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:53,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,301 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,341 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-08-27 05:19:53,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:19:53,342 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-27 05:19:53,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,342 INFO L225 Difference]: With dead ends: 20 [2021-08-27 05:19:53,342 INFO L226 Difference]: Without dead ends: 20 [2021-08-27 05:19:53,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-27 05:19:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-27 05:19:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-08-27 05:19:53,348 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 12 [2021-08-27 05:19:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-08-27 05:19:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-08-27 05:19:53,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 05:19:53,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,350 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 05:19:53,350 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr5ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,350 INFO L82 PathProgramCache]: Analyzing trace with hash 758111986, now seen corresponding path program 1 times [2021-08-27 05:19:53,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797014489] [2021-08-27 05:19:53,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:53,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:53,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:53,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797014489] [2021-08-27 05:19:53,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797014489] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:53,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:53,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 05:19:53,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519036677] [2021-08-27 05:19:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 05:19:53,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 05:19:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,399 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,426 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-08-27 05:19:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 05:19:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 05:19:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,428 INFO L225 Difference]: With dead ends: 22 [2021-08-27 05:19:53,428 INFO L226 Difference]: Without dead ends: 22 [2021-08-27 05:19:53,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 05:19:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-27 05:19:53,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-27 05:19:53,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-08-27 05:19:53,436 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 13 [2021-08-27 05:19:53,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,437 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-08-27 05:19:53,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,437 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-08-27 05:19:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-27 05:19:53,438 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,438 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 05:19:53,439 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr9ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2034300366, now seen corresponding path program 1 times [2021-08-27 05:19:53,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,441 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362938106] [2021-08-27 05:19:53,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 05:19:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 05:19:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 05:19:53,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 05:19:53,495 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362938106] [2021-08-27 05:19:53,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362938106] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 05:19:53,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 05:19:53,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 05:19:53,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154483491] [2021-08-27 05:19:53,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 05:19:53,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 05:19:53,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 05:19:53,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-27 05:19:53,496 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 05:19:53,530 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-08-27 05:19:53,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 05:19:53,531 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-27 05:19:53,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 05:19:53,531 INFO L225 Difference]: With dead ends: 21 [2021-08-27 05:19:53,531 INFO L226 Difference]: Without dead ends: 17 [2021-08-27 05:19:53,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-27 05:19:53,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-27 05:19:53,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-27 05:19:53,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.0) internal successors, (13), 13 states have internal predecessors, (13), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 16 transitions. [2021-08-27 05:19:53,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 16 transitions. Word has length 14 [2021-08-27 05:19:53,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 05:19:53,534 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 16 transitions. [2021-08-27 05:19:53,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 05:19:53,534 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 16 transitions. [2021-08-27 05:19:53,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 05:19:53,534 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 05:19:53,534 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 05:19:53,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 05:19:53,535 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr8ASSERT_VIOLATIONMEMORY_FREE === [mainErr0ASSERT_VIOLATIONMEMORY_FREE, mainErr1ASSERT_VIOLATIONMEMORY_FREE, mainErr2ASSERT_VIOLATIONMEMORY_FREE, mainErr3ASSERT_VIOLATIONMEMORY_FREE (and 6 more)] === [2021-08-27 05:19:53,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 05:19:53,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1976190218, now seen corresponding path program 1 times [2021-08-27 05:19:53,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 05:19:53,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249891412] [2021-08-27 05:19:53,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 05:19:53,536 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 05:19:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:19:53,543 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 05:19:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 05:19:53,560 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 05:19:53,560 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 05:19:53,561 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,562 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 05:19:53,563 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 05:19:53,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 05:19:53,567 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 05:19:53,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 05:19:53 BoogieIcfgContainer [2021-08-27 05:19:53,578 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 05:19:53,579 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 05:19:53,579 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 05:19:53,579 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 05:19:53,579 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 05:19:52" (3/4) ... [2021-08-27 05:19:53,580 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 05:19:53,599 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 05:19:53,599 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 05:19:53,600 INFO L168 Benchmark]: Toolchain (without parser) took 1730.10 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 41.9 MB in the beginning and 34.1 MB in the end (delta: 7.8 MB). Peak memory consumption was 29.3 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,600 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 46.1 MB. Free memory is still 28.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 05:19:53,601 INFO L168 Benchmark]: CACSL2BoogieTranslator took 336.74 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 36.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,601 INFO L168 Benchmark]: Boogie Preprocessor took 54.69 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 34.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,601 INFO L168 Benchmark]: RCFGBuilder took 370.58 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 34.1 MB in the beginning and 60.5 MB in the end (delta: -26.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,601 INFO L168 Benchmark]: TraceAbstraction took 932.97 ms. Allocated memory is still 79.7 MB. Free memory was 60.0 MB in the beginning and 35.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,601 INFO L168 Benchmark]: Witness Printer took 20.28 ms. Allocated memory is still 79.7 MB. Free memory was 35.6 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 05:19:53,603 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 46.1 MB. Free memory is still 28.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 336.74 ms. Allocated memory is still 58.7 MB. Free memory was 41.7 MB in the beginning and 36.2 MB in the end (delta: 5.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 54.69 ms. Allocated memory is still 58.7 MB. Free memory was 36.2 MB in the beginning and 34.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 370.58 ms. Allocated memory was 58.7 MB in the beginning and 79.7 MB in the end (delta: 21.0 MB). Free memory was 34.1 MB in the beginning and 60.5 MB in the end (delta: -26.4 MB). Peak memory consumption was 11.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 932.97 ms. Allocated memory is still 79.7 MB. Free memory was 60.0 MB in the beginning and 35.6 MB in the end (delta: 24.4 MB). Peak memory consumption was 23.6 MB. Max. memory is 16.1 GB. * Witness Printer took 20.28 ms. Allocated memory is still 79.7 MB. Free memory was 35.6 MB in the beginning and 34.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 554]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L543] struct T* x = ((void *)0); [L544] struct T* y = ((void *)0); [L545] y = malloc(sizeof(*y)) [L546] intptr_t adressY = (intptr_t) y; VAL [adressY=2, x={0:0}, y={2:0}] [L547] free(y) VAL [adressY=2, x={0:0}, y={2:0}] [L547] free(y) VAL [adressY=2, x={0:0}, y={2:0}] [L547] free(y) [L548] x = malloc(sizeof(*x)) [L549] intptr_t adressX = (intptr_t) x; VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L550] COND TRUE adressX == adressY VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L552] free(x) VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L552] free(x) VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L552] free(x) [L554] free(x) VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L554] free(x) VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] [L554] free(x) VAL [adressX=2, adressY=2, x={2:0}, y={2:0}] - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 539]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 45 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 889.9ms, OverallIterations: 8, TraceHistogramMax: 1, EmptinessCheckTime: 10.5ms, AutomataDifference: 314.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 5.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 115 SDtfs, 72 SDslu, 71 SDs, 0 SdLazy, 212 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 172.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=0, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 11.6ms SsaConstructionTime, 71.1ms SatisfiabilityAnalysisTime, 266.7ms InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 213 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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! [2021-08-27 05:19:53,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...