./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/list_flag-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/list-properties/list_flag-2.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 e2748dac41bc6cdd06fa5d8793326edbc7d40c79 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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/list-properties/list_flag-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 e2748dac41bc6cdd06fa5d8793326edbc7d40c79 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:14:51,035 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:14:51,038 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:14:51,078 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:14:51,079 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:14:51,089 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:14:51,091 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:14:51,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:14:51,098 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:14:51,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:14:51,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:14:51,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:14:51,106 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:14:51,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:14:51,111 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:14:51,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:14:51,115 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:14:51,116 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:14:51,119 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:14:51,126 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:14:51,128 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:14:51,129 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:14:51,132 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:14:51,133 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:14:51,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:14:51,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:14:51,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:14:51,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:14:51,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:14:51,152 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:14:51,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:14:51,158 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:14:51,159 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:14:51,160 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:14:51,161 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:14:51,161 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:14:51,162 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:14:51,162 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:14:51,162 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:14:51,163 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:14:51,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:14:51,165 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:14:51,189 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:14:51,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:14:51,191 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:14:51,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:14:51,191 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:14:51,192 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:14:51,192 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:14:51,192 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:14:51,192 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:14:51,193 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:14:51,193 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:14:51,193 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:14:51,194 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:14:51,194 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:14:51,194 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:14:51,194 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:14:51,195 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:14:51,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:14:51,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:14:51,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:14:51,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:14:51,197 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:14:51,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:51,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:14:51,198 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:14:51,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:14:51,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:14:51,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:14:51,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> e2748dac41bc6cdd06fa5d8793326edbc7d40c79 [2020-10-19 18:14:51,526 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:14:51,542 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:14:51,546 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:14:51,549 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:14:51,554 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:14:51,556 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-19 18:14:51,628 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08f237d8/2e583e338c704537a790aaf9bdc4576b/FLAG12f1cd09c [2020-10-19 18:14:52,158 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:14:52,159 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-19 18:14:52,180 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08f237d8/2e583e338c704537a790aaf9bdc4576b/FLAG12f1cd09c [2020-10-19 18:14:52,481 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e08f237d8/2e583e338c704537a790aaf9bdc4576b [2020-10-19 18:14:52,485 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:14:52,492 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:14:52,494 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:52,494 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:14:52,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:14:52,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:52" (1/1) ... [2020-10-19 18:14:52,501 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7468445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:52, skipping insertion in model container [2020-10-19 18:14:52,502 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:52" (1/1) ... [2020-10-19 18:14:52,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:14:52,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:14:52,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:53,008 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:14:53,047 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:53,116 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:14:53,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53 WrapperNode [2020-10-19 18:14:53,117 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:53,118 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:14:53,118 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:14:53,118 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:14:53,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,169 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... [2020-10-19 18:14:53,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:14:53,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:14:53,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:14:53,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:14:53,182 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:53,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:14:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:14:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:14:53,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:14:53,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:14:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:14:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:14:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:14:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:14:53,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:14:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:14:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:14:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:14:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:14:53,252 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:14:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:14:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:14:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:14:53,253 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:14:53,254 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:14:53,255 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:14:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:14:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:14:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:14:53,256 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:14:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:14:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:14:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:14:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:14:53,257 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:14:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:14:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:14:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:14:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:14:53,258 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:14:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:14:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:14:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:14:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:14:53,259 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:14:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:14:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:14:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:14:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:14:53,260 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:14:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:14:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:14:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:14:53,261 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:14:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:14:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:14:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:14:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:14:53,262 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:14:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:14:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:14:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:14:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:14:53,263 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:14:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:14:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:14:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:14:53,264 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:14:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:14:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:14:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:14:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:14:53,265 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:14:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:14:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:14:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:14:53,266 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:14:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:14:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:14:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:14:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:14:53,267 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:14:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:14:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:14:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:14:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:14:53,268 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:14:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:14:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:14:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:14:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:14:53,269 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:14:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:14:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:14:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:14:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:14:53,270 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:14:53,271 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:14:53,272 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:14:53,273 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:14:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:14:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:14:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:14:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:14:53,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:14:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:14:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:14:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:14:53,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:14:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:14:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:14:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:14:53,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:14:53,622 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:14:53,854 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:14:53,855 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:14:53,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:53 BoogieIcfgContainer [2020-10-19 18:14:53,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:14:53,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:14:53,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:14:53,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:14:53,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:14:52" (1/3) ... [2020-10-19 18:14:53,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e37877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:14:53, skipping insertion in model container [2020-10-19 18:14:53,864 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:53" (2/3) ... [2020-10-19 18:14:53,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76e37877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:14:53, skipping insertion in model container [2020-10-19 18:14:53,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:53" (3/3) ... [2020-10-19 18:14:53,866 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-19 18:14:53,879 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:14:53,888 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-19 18:14:53,903 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-19 18:14:53,922 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:14:53,923 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:14:53,923 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:14:53,923 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:14:53,924 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:14:53,924 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:14:53,924 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:14:53,924 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:14:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-19 18:14:53,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:14:53,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:53,954 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:53,955 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:14:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash 884508361, now seen corresponding path program 1 times [2020-10-19 18:14:53,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:53,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227552760] [2020-10-19 18:14:53,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:54,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:54,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227552760] [2020-10-19 18:14:54,198 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:54,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:14:54,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661380649] [2020-10-19 18:14:54,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:14:54,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:54,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:14:54,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:14:54,226 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 3 states. [2020-10-19 18:14:54,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:54,398 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-19 18:14:54,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:14:54,401 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-19 18:14:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:54,411 INFO L225 Difference]: With dead ends: 64 [2020-10-19 18:14:54,411 INFO L226 Difference]: Without dead ends: 57 [2020-10-19 18:14:54,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:14:54,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-19 18:14:54,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-19 18:14:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-19 18:14:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-19 18:14:54,457 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2020-10-19 18:14:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:54,458 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-19 18:14:54,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:14:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-19 18:14:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:14:54,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:54,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:54,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:14:54,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:14:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1649921759, now seen corresponding path program 1 times [2020-10-19 18:14:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:54,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436059209] [2020-10-19 18:14:54,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:54,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:54,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436059209] [2020-10-19 18:14:54,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:54,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:14:54,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859063864] [2020-10-19 18:14:54,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:14:54,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:54,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:14:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:54,594 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 5 states. [2020-10-19 18:14:54,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:54,780 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-19 18:14:54,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:54,781 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 18:14:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:54,785 INFO L225 Difference]: With dead ends: 65 [2020-10-19 18:14:54,785 INFO L226 Difference]: Without dead ends: 65 [2020-10-19 18:14:54,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:54,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-19 18:14:54,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-19 18:14:54,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-19 18:14:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-19 18:14:54,796 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 11 [2020-10-19 18:14:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:54,797 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-19 18:14:54,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:14:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-19 18:14:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-19 18:14:54,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:54,798 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:54,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:14:54,799 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:14:54,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:54,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1649921760, now seen corresponding path program 1 times [2020-10-19 18:14:54,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:54,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922526285] [2020-10-19 18:14:54,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:54,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:54,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922526285] [2020-10-19 18:14:54,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:54,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:14:54,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788945982] [2020-10-19 18:14:54,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:14:54,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:54,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:14:54,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:54,906 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 5 states. [2020-10-19 18:14:55,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:55,092 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-19 18:14:55,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:55,093 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-19 18:14:55,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:55,096 INFO L225 Difference]: With dead ends: 77 [2020-10-19 18:14:55,096 INFO L226 Difference]: Without dead ends: 77 [2020-10-19 18:14:55,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:55,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-19 18:14:55,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-19 18:14:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-19 18:14:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-19 18:14:55,106 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 11 [2020-10-19 18:14:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:55,106 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-19 18:14:55,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:14:55,107 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-19 18:14:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:14:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:55,108 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:55,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:14:55,109 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:14:55,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:55,110 INFO L82 PathProgramCache]: Analyzing trace with hash -590364418, now seen corresponding path program 1 times [2020-10-19 18:14:55,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:55,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362673022] [2020-10-19 18:14:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:14:55,135 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:14:55,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:14:55,155 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:14:55,187 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:14:55,189 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:14:55,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:14:55,214 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:14:55,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:14:55 BoogieIcfgContainer [2020-10-19 18:14:55,240 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:14:55,241 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:14:55,241 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:14:55,241 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:14:55,242 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:53" (3/4) ... [2020-10-19 18:14:55,246 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:14:55,246 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:14:55,249 INFO L168 Benchmark]: Toolchain (without parser) took 2760.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 961.3 MB in the beginning and 919.7 MB in the end (delta: 41.6 MB). Peak memory consumption was 172.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:14:55,249 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:14:55,250 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 955.9 MB in the beginning and 1.1 GB in the end (delta: -137.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:14:55,251 INFO L168 Benchmark]: Boogie Preprocessor took 62.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:14:55,252 INFO L168 Benchmark]: RCFGBuilder took 677.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:14:55,253 INFO L168 Benchmark]: TraceAbstraction took 1381.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 926.4 MB in the end (delta: 114.8 MB). Peak memory consumption was 114.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:14:55,254 INFO L168 Benchmark]: Witness Printer took 5.42 ms. Allocated memory is still 1.2 GB. Free memory was 926.4 MB in the beginning and 919.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. [2020-10-19 18:14:55,259 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 623.80 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 130.5 MB). Free memory was 955.9 MB in the beginning and 1.1 GB in the end (delta: -137.3 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 62.01 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 677.22 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.0 MB). Peak memory consumption was 52.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1381.89 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 926.4 MB in the end (delta: 114.8 MB). Peak memory consumption was 114.8 MB. Max. memory is 11.5 GB. * Witness Printer took 5.42 ms. Allocated memory is still 1.2 GB. Free memory was 926.4 MB in the beginning and 919.7 MB in the end (delta: 6.7 MB). Peak memory consumption was 6.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}] [L535] COND FALSE !(a == 0) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}] [L536] p = a VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L549] p = a VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L550] COND FALSE !(\read(flag)) VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L554] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={-1:0}, flag=0, malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 83 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 122 SDtfs, 194 SDslu, 42 SDs, 0 SdLazy, 277 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 50 NumberOfCodeBlocks, 50 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 29 ConstructedInterpolants, 0 QuantifiedInterpolants, 1577 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-906a4fb [2020-10-19 18:14:57,186 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:14:57,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:14:57,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:14:57,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:14:57,252 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:14:57,254 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:14:57,257 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:14:57,260 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:14:57,262 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:14:57,263 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:14:57,266 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:14:57,267 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:14:57,273 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:14:57,274 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:14:57,275 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:14:57,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:14:57,280 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:14:57,284 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:14:57,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:14:57,290 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:14:57,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:14:57,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:14:57,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:14:57,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:14:57,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:14:57,304 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:14:57,306 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:14:57,307 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:14:57,308 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:14:57,309 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:14:57,310 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:14:57,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:14:57,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:14:57,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:14:57,314 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:14:57,315 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:14:57,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:14:57,316 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:14:57,317 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:14:57,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:14:57,320 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-19 18:14:57,370 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:14:57,371 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:14:57,373 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:14:57,373 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:14:57,374 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:14:57,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:14:57,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:14:57,374 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:14:57,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:14:57,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:14:57,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:14:57,377 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:14:57,377 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:14:57,378 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:14:57,378 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:14:57,378 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:14:57,378 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 18:14:57,379 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 18:14:57,379 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:14:57,379 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:14:57,380 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:14:57,380 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:14:57,380 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:14:57,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:14:57,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:57,381 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:14:57,381 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:14:57,382 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 18:14:57,382 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 18:14:57,383 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:14:57,383 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 18:14:57,383 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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 -> e2748dac41bc6cdd06fa5d8793326edbc7d40c79 [2020-10-19 18:14:57,720 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:14:57,740 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:14:57,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:14:57,748 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:14:57,751 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:14:57,752 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-19 18:14:57,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d725219/e82d88ad0fd5407990ea1196e1b2abbb/FLAG73992b08e [2020-10-19 18:14:58,393 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:14:58,394 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-19 18:14:58,408 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d725219/e82d88ad0fd5407990ea1196e1b2abbb/FLAG73992b08e [2020-10-19 18:14:58,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e6d725219/e82d88ad0fd5407990ea1196e1b2abbb [2020-10-19 18:14:58,664 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:14:58,670 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:14:58,671 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:58,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:14:58,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:14:58,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:58" (1/1) ... [2020-10-19 18:14:58,681 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a795622 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:58, skipping insertion in model container [2020-10-19 18:14:58,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:58" (1/1) ... [2020-10-19 18:14:58,691 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:14:58,743 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:14:59,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:59,156 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:14:59,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:59,288 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:14:59,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59 WrapperNode [2020-10-19 18:14:59,289 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:59,290 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:14:59,290 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:14:59,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:14:59,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,354 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,356 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,413 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... [2020-10-19 18:14:59,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:14:59,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:14:59,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:14:59,433 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:14:59,434 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:59,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:14:59,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:14:59,504 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 18:14:59,504 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:14:59,505 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:14:59,506 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:14:59,506 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:14:59,507 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:14:59,508 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:14:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:14:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:14:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:14:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:14:59,509 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:14:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:14:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:14:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:14:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:14:59,510 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:14:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:14:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:14:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:14:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:14:59,511 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:14:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:14:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:14:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:14:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:14:59,512 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:14:59,513 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:14:59,513 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:14:59,513 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:14:59,513 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:14:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:14:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:14:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:14:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:14:59,514 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:14:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:14:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:14:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:14:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:14:59,515 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:14:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:14:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:14:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:14:59,516 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:14:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:14:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:14:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:14:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:14:59,517 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:14:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:14:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:14:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:14:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:14:59,518 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:14:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:14:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:14:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:14:59,519 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:14:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:14:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:14:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:14:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:14:59,520 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:14:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:14:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:14:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:14:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:14:59,521 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:14:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:14:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:14:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:14:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:14:59,522 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:14:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:14:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:14:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:14:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:14:59,523 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:14:59,524 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:14:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:14:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:14:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:14:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:14:59,525 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:14:59,526 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:14:59,526 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:14:59,526 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:14:59,526 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:14:59,526 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:14:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:14:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:14:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:14:59,527 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:14:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:14:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:14:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:14:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:14:59,528 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:14:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:14:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:14:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:14:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 18:14:59,529 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:14:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:14:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 18:14:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:14:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 18:14:59,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:14:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 18:14:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-19 18:14:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-19 18:14:59,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:14:59,913 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:15:00,209 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:15:00,210 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-19 18:15:00,212 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:00 BoogieIcfgContainer [2020-10-19 18:15:00,212 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:15:00,213 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:15:00,213 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:15:00,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:15:00,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:14:58" (1/3) ... [2020-10-19 18:15:00,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88d50ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:15:00, skipping insertion in model container [2020-10-19 18:15:00,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:59" (2/3) ... [2020-10-19 18:15:00,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@88d50ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:15:00, skipping insertion in model container [2020-10-19 18:15:00,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:00" (3/3) ... [2020-10-19 18:15:00,221 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-19 18:15:00,233 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:15:00,240 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-19 18:15:00,254 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-19 18:15:00,273 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:15:00,273 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:15:00,274 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:15:00,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:15:00,274 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:15:00,274 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:15:00,274 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:15:00,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:15:00,289 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-19 18:15:00,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:15:00,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:00,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:00,299 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:15:00,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:00,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1710436202, now seen corresponding path program 1 times [2020-10-19 18:15:00,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:00,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [784975889] [2020-10-19 18:15:00,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:00,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 18:15:00,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:00,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:00,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [784975889] [2020-10-19 18:15:00,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:00,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 18:15:00,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054057985] [2020-10-19 18:15:00,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 18:15:00,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:00,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 18:15:00,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 18:15:00,582 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2020-10-19 18:15:00,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:00,606 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-19 18:15:00,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 18:15:00,608 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-19 18:15:00,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:00,617 INFO L225 Difference]: With dead ends: 63 [2020-10-19 18:15:00,618 INFO L226 Difference]: Without dead ends: 56 [2020-10-19 18:15:00,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 18:15:00,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-19 18:15:00,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-19 18:15:00,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-19 18:15:00,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-19 18:15:00,663 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 10 [2020-10-19 18:15:00,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:00,664 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-19 18:15:00,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 18:15:00,664 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-19 18:15:00,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:15:00,665 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:00,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:00,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 18:15:00,873 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:15:00,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:00,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1710435241, now seen corresponding path program 1 times [2020-10-19 18:15:00,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:00,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786472000] [2020-10-19 18:15:00,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:15:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:01,068 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:01,069 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:01,073 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:01,074 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:01,074 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-19 18:15:01,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:01,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:01,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:01,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786472000] [2020-10-19 18:15:01,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:01,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-19 18:15:01,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451790660] [2020-10-19 18:15:01,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:15:01,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:01,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:15:01,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:15:01,116 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-10-19 18:15:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:01,387 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-19 18:15:01,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:15:01,389 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:15:01,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:01,392 INFO L225 Difference]: With dead ends: 63 [2020-10-19 18:15:01,392 INFO L226 Difference]: Without dead ends: 63 [2020-10-19 18:15:01,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:15:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-19 18:15:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2020-10-19 18:15:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-19 18:15:01,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-19 18:15:01,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 10 [2020-10-19 18:15:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:01,403 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-19 18:15:01,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:15:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-19 18:15:01,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:15:01,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:01,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:01,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-19 18:15:01,619 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:15:01,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:01,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1710435242, now seen corresponding path program 1 times [2020-10-19 18:15:01,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:01,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [376649790] [2020-10-19 18:15:01,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:01,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:15:01,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:01,767 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:01,768 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:01,776 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:01,776 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:01,777 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 18:15:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:01,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:01,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:01,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [376649790] [2020-10-19 18:15:01,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:01,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-19 18:15:01,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709620619] [2020-10-19 18:15:01,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:15:01,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:15:01,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:15:01,924 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 6 states. [2020-10-19 18:15:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:02,351 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-19 18:15:02,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:15:02,353 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-19 18:15:02,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:02,355 INFO L225 Difference]: With dead ends: 74 [2020-10-19 18:15:02,355 INFO L226 Difference]: Without dead ends: 74 [2020-10-19 18:15:02,356 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:15:02,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-19 18:15:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-19 18:15:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-19 18:15:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-19 18:15:02,364 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 10 [2020-10-19 18:15:02,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:02,365 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-19 18:15:02,365 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:15:02,365 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-19 18:15:02,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-19 18:15:02,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:02,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:02,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-19 18:15:02,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr19REQUIRES_VIOLATION, mainErr18REQUIRES_VIOLATION, mainErr8REQUIRES_VIOLATION, mainErr9REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr16REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr17REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr13REQUIRES_VIOLATION, mainErr15REQUIRES_VIOLATION, mainErr14REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr20ENSURES_VIOLATIONMEMORY_LEAK, mainErr10REQUIRES_VIOLATION, mainErr11REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr12REQUIRES_VIOLATION]=== [2020-10-19 18:15:02,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:02,581 INFO L82 PathProgramCache]: Analyzing trace with hash -544900418, now seen corresponding path program 1 times [2020-10-19 18:15:02,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:02,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [277814048] [2020-10-19 18:15:02,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:02,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:15:02,697 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:15:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:15:02,733 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:15:02,766 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-19 18:15:02,767 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:15:02,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-19 18:15:02,982 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:15:03,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:15:03 BoogieIcfgContainer [2020-10-19 18:15:03,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:15:03,005 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:15:03,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:15:03,006 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:15:03,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:00" (3/4) ... [2020-10-19 18:15:03,010 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:15:03,010 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:15:03,013 INFO L168 Benchmark]: Toolchain (without parser) took 4346.40 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 955.9 MB in the beginning and 813.6 MB in the end (delta: 142.3 MB). Peak memory consumption was 244.6 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:03,014 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:03,015 INFO L168 Benchmark]: CACSL2BoogieTranslator took 618.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -118.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:03,017 INFO L168 Benchmark]: Boogie Preprocessor took 141.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:03,020 INFO L168 Benchmark]: RCFGBuilder took 779.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:03,021 INFO L168 Benchmark]: TraceAbstraction took 2791.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 813.6 MB in the end (delta: 196.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:03,022 INFO L168 Benchmark]: Witness Printer took 4.95 ms. Allocated memory is still 1.1 GB. Free memory is still 813.6 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:03,025 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 618.27 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 102.2 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -118.4 MB). Peak memory consumption was 15.2 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 141.73 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 779.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 59.0 MB). Peak memory consumption was 59.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2791.91 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 813.6 MB in the end (delta: 196.4 MB). Peak memory consumption was 196.4 MB. Max. memory is 11.5 GB. * Witness Printer took 4.95 ms. Allocated memory is still 1.1 GB. Free memory is still 813.6 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}] [L535] COND FALSE !(a == 0) VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}] [L536] p = a VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}] [L549] p = a VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}] [L550] COND TRUE \read(flag) VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}] [L551] EXPR p->h VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3] [L551] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={1:0}, flag=2147483648, malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 88 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.6s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 215 SDslu, 46 SDs, 0 SdLazy, 108 SolverSat, 43 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 14 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 47 NumberOfCodeBlocks, 47 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 54 ConstructedInterpolants, 0 QuantifiedInterpolants, 1494 SizeOfPredicates, 8 NumberOfNonLiveVariables, 192 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 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 could not prove your program: unable to determine feasibility of some traces Received shutdown request...