./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.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 -Xmx15G -Xms4m -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 0.1.25-9a8b2e8 [2020-10-20 06:07:43,627 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:07:43,631 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:07:43,661 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:07:43,661 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:07:43,662 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:07:43,663 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:07:43,673 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:07:43,679 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:07:43,679 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:07:43,680 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:07:43,686 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:07:43,686 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:07:43,687 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:07:43,688 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:07:43,690 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:07:43,692 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:07:43,694 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:07:43,697 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:07:43,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:07:43,703 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:07:43,706 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:07:43,707 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:07:43,709 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:07:43,714 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:07:43,716 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:07:43,716 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:07:43,717 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:07:43,718 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:07:43,720 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:07:43,720 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:07:43,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:07:43,721 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:07:43,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:07:43,723 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:07:43,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:07:43,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:07:43,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:07:43,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:07:43,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:07:43,728 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:07:43,730 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-20 06:07:43,770 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:07:43,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:07:43,772 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:07:43,773 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:07:43,773 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:07:43,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:07:43,773 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:07:43,774 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:07:43,774 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:07:43,774 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:07:43,775 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:07:43,776 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:07:43,776 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:07:43,776 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:07:43,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:07:43,777 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:07:43,777 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:07:43,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:07:43,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:07:43,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:07:43,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:07:43,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:07:43,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:07:43,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:07:43,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:07:43,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:07:43,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:07:43,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:07:43,781 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 [2020-10-20 06:07:43,989 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:07:44,008 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:07:44,013 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:07:44,015 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:07:44,015 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:07:44,016 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-20 06:07:44,087 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d477d1cb5/a192301d1207476683f98654fcbd1308/FLAGab664cc8c [2020-10-20 06:07:44,652 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:07:44,653 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-20 06:07:44,677 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d477d1cb5/a192301d1207476683f98654fcbd1308/FLAGab664cc8c [2020-10-20 06:07:44,907 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d477d1cb5/a192301d1207476683f98654fcbd1308 [2020-10-20 06:07:44,910 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:07:44,917 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:07:44,918 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:07:44,918 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:07:44,921 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:07:44,922 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:44" (1/1) ... [2020-10-20 06:07:44,925 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59f72a82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:44, skipping insertion in model container [2020-10-20 06:07:44,925 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:44" (1/1) ... [2020-10-20 06:07:44,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:07:44,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:07:45,372 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:07:45,381 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:07:45,420 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:07:45,490 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:07:45,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45 WrapperNode [2020-10-20 06:07:45,491 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:07:45,492 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:07:45,492 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:07:45,492 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:07:45,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,520 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,543 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,547 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (1/1) ... [2020-10-20 06:07:45,553 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:07:45,554 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:07:45,554 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:07:45,554 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:07:45,555 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (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 [2020-10-20 06:07:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:07:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:07:45,616 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:07:45,617 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 06:07:45,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 06:07:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 06:07:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 06:07:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 06:07:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-20 06:07:45,619 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:07:45,620 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:07:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:07:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-20 06:07:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-20 06:07:45,621 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:07:45,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:07:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:07:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 06:07:45,624 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 06:07:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 06:07:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 06:07:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 06:07:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 06:07:45,625 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 06:07:45,626 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 06:07:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 06:07:45,627 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 06:07:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 06:07:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 06:07:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 06:07:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 06:07:45,628 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 06:07:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 06:07:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 06:07:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 06:07:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 06:07:45,629 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 06:07:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 06:07:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 06:07:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 06:07:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 06:07:45,630 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 06:07:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 06:07:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 06:07:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 06:07:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 06:07:45,631 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 06:07:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 06:07:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 06:07:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 06:07:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 06:07:45,632 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 06:07:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 06:07:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 06:07:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 06:07:45,633 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 06:07:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 06:07:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 06:07:45,634 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 06:07:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 06:07:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 06:07:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 06:07:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 06:07:45,635 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 06:07:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 06:07:45,636 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 06:07:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 06:07:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 06:07:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 06:07:45,637 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 06:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 06:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 06:07:45,638 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 06:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 06:07:45,639 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 06:07:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 06:07:45,640 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 06:07:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 06:07:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 06:07:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 06:07:45,641 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 06:07:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 06:07:45,642 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 06:07:45,643 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 06:07:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 06:07:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 06:07:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 06:07:45,649 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 06:07:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 06:07:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 06:07:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 06:07:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 06:07:45,650 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 06:07:45,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 06:07:45,651 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 06:07:45,651 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 06:07:45,651 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 06:07:45,651 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 06:07:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 06:07:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 06:07:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 06:07:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 06:07:45,652 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 06:07:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 06:07:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 06:07:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 06:07:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 06:07:45,653 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 06:07:45,654 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 06:07:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 06:07:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 06:07:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 06:07:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 06:07:45,655 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 06:07:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 06:07:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 06:07:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 06:07:45,656 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 06:07:45,657 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 06:07:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-20 06:07:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:07:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:07:45,658 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:07:45,659 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:07:46,003 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-20 06:07:46,195 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:07:46,195 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 06:07:46,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:46 BoogieIcfgContainer [2020-10-20 06:07:46,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:07:46,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:07:46,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:07:46,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:07:46,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:07:44" (1/3) ... [2020-10-20 06:07:46,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584c1551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:46, skipping insertion in model container [2020-10-20 06:07:46,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:45" (2/3) ... [2020-10-20 06:07:46,204 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@584c1551 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:46, skipping insertion in model container [2020-10-20 06:07:46,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:46" (3/3) ... [2020-10-20 06:07:46,206 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-20 06:07:46,217 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:07:46,224 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-20 06:07:46,239 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-20 06:07:46,263 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:07:46,263 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:07:46,263 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:07:46,264 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:07:46,264 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:07:46,264 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:07:46,265 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:07:46,265 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:07:46,282 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-20 06:07:46,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:07:46,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:46,292 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:46,293 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]=== [2020-10-20 06:07:46,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:46,299 INFO L82 PathProgramCache]: Analyzing trace with hash 884508361, now seen corresponding path program 1 times [2020-10-20 06:07:46,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:07:46,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512103610] [2020-10-20 06:07:46,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:07:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:46,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:07:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:46,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512103610] [2020-10-20 06:07:46,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:46,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-20 06:07:46,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102084123] [2020-10-20 06:07:46,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:07:46,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:07:46,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:07:46,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:07:46,545 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 3 states. [2020-10-20 06:07:46,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:46,704 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2020-10-20 06:07:46,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:07:46,706 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-20 06:07:46,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:46,715 INFO L225 Difference]: With dead ends: 64 [2020-10-20 06:07:46,715 INFO L226 Difference]: Without dead ends: 57 [2020-10-20 06:07:46,717 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 [2020-10-20 06:07:46,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-20 06:07:46,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-20 06:07:46,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-20 06:07:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2020-10-20 06:07:46,756 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 10 [2020-10-20 06:07:46,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:46,757 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2020-10-20 06:07:46,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:07:46,757 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2020-10-20 06:07:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:07:46,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:46,758 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:46,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:07:46,759 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]=== [2020-10-20 06:07:46,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:46,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1649921759, now seen corresponding path program 1 times [2020-10-20 06:07:46,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:07:46,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323361432] [2020-10-20 06:07:46,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:07:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:07:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:46,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:46,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323361432] [2020-10-20 06:07:46,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:46,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:07:46,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008321243] [2020-10-20 06:07:46,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:07:46,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:07:46,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:07:46,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:07:46,893 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 5 states. [2020-10-20 06:07:47,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:47,086 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-10-20 06:07:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:07:47,087 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 06:07:47,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:47,090 INFO L225 Difference]: With dead ends: 65 [2020-10-20 06:07:47,090 INFO L226 Difference]: Without dead ends: 65 [2020-10-20 06:07:47,091 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 [2020-10-20 06:07:47,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-20 06:07:47,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-20 06:07:47,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-20 06:07:47,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-10-20 06:07:47,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 11 [2020-10-20 06:07:47,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:47,101 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-10-20 06:07:47,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:07:47,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-10-20 06:07:47,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:07:47,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:47,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:47,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:07:47,103 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]=== [2020-10-20 06:07:47,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:47,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1649921760, now seen corresponding path program 1 times [2020-10-20 06:07:47,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:07:47,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443645771] [2020-10-20 06:07:47,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:07:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:47,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-20 06:07:47,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:47,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443645771] [2020-10-20 06:07:47,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:47,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-20 06:07:47,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981051832] [2020-10-20 06:07:47,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-20 06:07:47,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:07:47,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-20 06:07:47,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-20 06:07:47,221 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 5 states. [2020-10-20 06:07:47,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:47,433 INFO L93 Difference]: Finished difference Result 77 states and 85 transitions. [2020-10-20 06:07:47,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:07:47,434 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-10-20 06:07:47,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:47,437 INFO L225 Difference]: With dead ends: 77 [2020-10-20 06:07:47,437 INFO L226 Difference]: Without dead ends: 77 [2020-10-20 06:07:47,437 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 [2020-10-20 06:07:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-20 06:07:47,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 69. [2020-10-20 06:07:47,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-20 06:07:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2020-10-20 06:07:47,445 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 11 [2020-10-20 06:07:47,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:47,446 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2020-10-20 06:07:47,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-20 06:07:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2020-10-20 06:07:47,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:07:47,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:47,448 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:47,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:07:47,448 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]=== [2020-10-20 06:07:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:47,449 INFO L82 PathProgramCache]: Analyzing trace with hash -590364418, now seen corresponding path program 1 times [2020-10-20 06:07:47,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:07:47,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223522207] [2020-10-20 06:07:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:07:47,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:07:47,494 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:07:47,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:07:47,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:07:47,537 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-20 06:07:47,538 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:07:47,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:07:47,552 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-20 06:07:47,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:07:47 BoogieIcfgContainer [2020-10-20 06:07:47,568 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:07:47,568 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:07:47,569 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:07:47,569 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:07:47,570 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:46" (3/4) ... [2020-10-20 06:07:47,575 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:07:47,576 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:07:47,579 INFO L168 Benchmark]: Toolchain (without parser) took 2666.27 ms. Allocated memory was 34.1 MB in the beginning and 55.6 MB in the end (delta: 21.5 MB). Free memory was 10.0 MB in the beginning and 29.9 MB in the end (delta: -19.9 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:47,581 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.0 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:07:47,583 INFO L168 Benchmark]: CACSL2BoogieTranslator took 573.93 ms. Allocated memory was 34.1 MB in the beginning and 44.0 MB in the end (delta: 10.0 MB). Free memory was 9.2 MB in the beginning and 24.3 MB in the end (delta: -15.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:47,585 INFO L168 Benchmark]: Boogie Preprocessor took 61.73 ms. Allocated memory is still 44.0 MB. Free memory was 24.3 MB in the beginning and 21.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:47,586 INFO L168 Benchmark]: RCFGBuilder took 643.39 ms. Allocated memory was 44.0 MB in the beginning and 46.7 MB in the end (delta: 2.6 MB). Free memory was 21.3 MB in the beginning and 17.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:47,590 INFO L168 Benchmark]: TraceAbstraction took 1369.28 ms. Allocated memory was 46.7 MB in the beginning and 55.6 MB in the end (delta: 8.9 MB). Free memory was 17.3 MB in the beginning and 30.4 MB in the end (delta: -13.1 MB). There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:07:47,592 INFO L168 Benchmark]: Witness Printer took 7.89 ms. Allocated memory is still 55.6 MB. Free memory is still 29.9 MB. There was no memory consumed. Max. memory is 14.3 GB. [2020-10-20 06:07:47,597 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 33.0 MB. Free memory was 18.1 MB in the beginning and 18.0 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 573.93 ms. Allocated memory was 34.1 MB in the beginning and 44.0 MB in the end (delta: 10.0 MB). Free memory was 9.2 MB in the beginning and 24.3 MB in the end (delta: -15.1 MB). Peak memory consumption was 8.9 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 61.73 ms. Allocated memory is still 44.0 MB. Free memory was 24.3 MB in the beginning and 21.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 14.3 GB. * RCFGBuilder took 643.39 ms. Allocated memory was 44.0 MB in the beginning and 46.7 MB in the end (delta: 2.6 MB). Free memory was 21.3 MB in the beginning and 17.6 MB in the end (delta: 3.7 MB). Peak memory consumption was 12.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 1369.28 ms. Allocated memory was 46.7 MB in the beginning and 55.6 MB in the end (delta: 8.9 MB). Free memory was 17.3 MB in the beginning and 30.4 MB in the end (delta: -13.1 MB). There was no memory consumed. Max. memory is 14.3 GB. * Witness Printer took 7.89 ms. Allocated memory is still 55.6 MB. Free memory is still 29.9 MB. There was no memory consumed. Max. memory is 14.3 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: 0.6s, 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 0.1.25-9a8b2e8 [2020-10-20 06:07:49,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:07:49,665 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:07:49,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:07:49,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:07:49,706 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:07:49,707 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:07:49,709 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:07:49,711 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:07:49,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:07:49,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:07:49,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:07:49,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:07:49,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:07:49,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:07:49,717 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:07:49,718 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:07:49,719 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:07:49,721 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:07:49,730 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:07:49,732 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:07:49,733 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:07:49,734 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:07:49,735 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:07:49,738 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:07:49,738 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:07:49,738 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:07:49,739 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:07:49,740 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:07:49,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:07:49,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:07:49,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:07:49,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:07:49,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:07:49,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:07:49,744 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:07:49,745 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:07:49,745 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:07:49,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:07:49,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:07:49,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:07:49,748 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-20 06:07:49,769 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:07:49,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:07:49,771 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:07:49,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:07:49,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:07:49,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:07:49,772 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:07:49,772 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:07:49,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:07:49,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:07:49,773 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:07:49,773 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-20 06:07:49,773 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-20 06:07:49,773 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-20 06:07:49,774 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:07:49,774 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-20 06:07:49,774 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-20 06:07:49,774 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-20 06:07:49,775 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:07:49,775 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:07:49,775 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:07:49,775 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:07:49,776 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:07:49,776 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:07:49,776 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:07:49,777 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:07:49,777 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:07:49,777 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-20 06:07:49,777 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-20 06:07:49,778 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:07:49,778 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-20 06:07:49,778 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 [2020-10-20 06:07:49,974 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:07:49,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:07:49,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:07:49,990 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:07:49,990 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:07:49,991 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-20 06:07:50,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc924f6b5/300fa04168d047c695a324019d43c7a6/FLAG29cbe8aa2 [2020-10-20 06:07:50,563 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:07:50,564 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-2.i [2020-10-20 06:07:50,577 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc924f6b5/300fa04168d047c695a324019d43c7a6/FLAG29cbe8aa2 [2020-10-20 06:07:50,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dc924f6b5/300fa04168d047c695a324019d43c7a6 [2020-10-20 06:07:50,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:07:50,870 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-20 06:07:50,871 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:07:50,871 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:07:50,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:07:50,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:50" (1/1) ... [2020-10-20 06:07:50,878 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47ebff8f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:50, skipping insertion in model container [2020-10-20 06:07:50,879 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:07:50" (1/1) ... [2020-10-20 06:07:50,886 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:07:50,944 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:07:51,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:07:51,332 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:07:51,380 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:07:51,468 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:07:51,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51 WrapperNode [2020-10-20 06:07:51,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:07:51,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:07:51,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:07:51,472 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:07:51,486 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,523 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,524 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,553 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (1/1) ... [2020-10-20 06:07:51,575 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:07:51,578 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:07:51,580 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:07:51,580 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:07:51,581 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (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 [2020-10-20 06:07:51,643 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-20 06:07:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:07:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-20 06:07:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-20 06:07:51,644 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-20 06:07:51,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-20 06:07:51,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-20 06:07:51,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-20 06:07:51,645 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-20 06:07:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-20 06:07:51,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-20 06:07:51,646 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-20 06:07:51,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-20 06:07:51,646 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-20 06:07:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-20 06:07:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-20 06:07:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:07:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-20 06:07:51,647 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-20 06:07:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-20 06:07:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-20 06:07:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-20 06:07:51,648 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-20 06:07:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-20 06:07:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-20 06:07:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-20 06:07:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-20 06:07:51,649 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-20 06:07:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-20 06:07:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-20 06:07:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-20 06:07:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-20 06:07:51,650 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-20 06:07:51,651 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-20 06:07:51,652 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-20 06:07:51,653 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-20 06:07:51,654 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-20 06:07:51,655 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-20 06:07:51,655 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-20 06:07:51,655 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-20 06:07:51,655 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-20 06:07:51,655 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-20 06:07:51,656 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-20 06:07:51,656 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-20 06:07:51,656 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-20 06:07:51,656 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-20 06:07:51,656 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-20 06:07:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-20 06:07:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-20 06:07:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-20 06:07:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-20 06:07:51,657 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-20 06:07:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-20 06:07:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-20 06:07:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-20 06:07:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-20 06:07:51,658 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-20 06:07:51,665 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-20 06:07:51,665 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-20 06:07:51,665 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-20 06:07:51,665 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-20 06:07:51,666 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-20 06:07:51,667 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-20 06:07:51,668 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-20 06:07:51,669 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-20 06:07:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-20 06:07:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-20 06:07:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-20 06:07:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-20 06:07:51,670 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-20 06:07:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-20 06:07:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-20 06:07:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-20 06:07:51,671 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-20 06:07:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-20 06:07:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-20 06:07:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-20 06:07:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-20 06:07:51,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-20 06:07:51,673 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-20 06:07:51,674 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-20 06:07:51,674 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-20 06:07:52,036 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-20 06:07:52,336 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:07:52,336 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-20 06:07:52,338 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:52 BoogieIcfgContainer [2020-10-20 06:07:52,338 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:07:52,340 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:07:52,340 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:07:52,343 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:07:52,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:07:50" (1/3) ... [2020-10-20 06:07:52,344 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa774c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:52, skipping insertion in model container [2020-10-20 06:07:52,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:07:51" (2/3) ... [2020-10-20 06:07:52,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa774c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:07:52, skipping insertion in model container [2020-10-20 06:07:52,345 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:52" (3/3) ... [2020-10-20 06:07:52,347 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-10-20 06:07:52,358 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:07:52,365 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-10-20 06:07:52,379 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-10-20 06:07:52,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:07:52,400 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-20 06:07:52,400 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:07:52,400 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:07:52,401 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:07:52,401 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:07:52,401 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:07:52,401 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:07:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-10-20 06:07:52,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:07:52,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:52,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:52,440 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]=== [2020-10-20 06:07:52,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1710436202, now seen corresponding path program 1 times [2020-10-20 06:07:52,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:07:52,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [913348328] [2020-10-20 06:07:52,461 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 [2020-10-20 06:07:52,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:52,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-20 06:07:52,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:07:52,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:52,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:07:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:52,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [913348328] [2020-10-20 06:07:52,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:52,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-20 06:07:52,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340520830] [2020-10-20 06:07:52,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-20 06:07:52,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:07:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-20 06:07:52,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-20 06:07:52,701 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 2 states. [2020-10-20 06:07:52,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:52,723 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-20 06:07:52,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-20 06:07:52,724 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-20 06:07:52,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:52,733 INFO L225 Difference]: With dead ends: 63 [2020-10-20 06:07:52,733 INFO L226 Difference]: Without dead ends: 56 [2020-10-20 06:07:52,735 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 [2020-10-20 06:07:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-20 06:07:52,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-10-20 06:07:52,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-20 06:07:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-20 06:07:52,775 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 10 [2020-10-20 06:07:52,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:52,776 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-20 06:07:52,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-20 06:07:52,776 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-20 06:07:52,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:07:52,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:52,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:52,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-20 06:07:53,000 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]=== [2020-10-20 06:07:53,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1710435241, now seen corresponding path program 1 times [2020-10-20 06:07:53,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:07:53,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1571116874] [2020-10-20 06:07:53,003 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 [2020-10-20 06:07:53,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:53,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-20 06:07:53,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:07:53,240 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 [2020-10-20 06:07:53,241 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:07:53,245 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:07:53,245 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:07:53,245 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-20 06:07:53,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:53,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:07:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:53,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1571116874] [2020-10-20 06:07:53,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:53,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-20 06:07:53,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835392109] [2020-10-20 06:07:53,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-20 06:07:53,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:07:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-20 06:07:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-20 06:07:53,279 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 4 states. [2020-10-20 06:07:53,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:53,492 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2020-10-20 06:07:53,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-20 06:07:53,494 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-20 06:07:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:53,497 INFO L225 Difference]: With dead ends: 63 [2020-10-20 06:07:53,497 INFO L226 Difference]: Without dead ends: 63 [2020-10-20 06:07:53,498 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 [2020-10-20 06:07:53,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-20 06:07:53,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2020-10-20 06:07:53,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-20 06:07:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-20 06:07:53,507 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 10 [2020-10-20 06:07:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:53,508 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-20 06:07:53,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-20 06:07:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-20 06:07:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-20 06:07:53,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:53,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:53,722 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-20 06:07:53,722 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]=== [2020-10-20 06:07:53,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:53,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1710435242, now seen corresponding path program 1 times [2020-10-20 06:07:53,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:07:53,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1411444179] [2020-10-20 06:07:53,741 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 [2020-10-20 06:07:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:07:53,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-20 06:07:53,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:07:53,849 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 [2020-10-20 06:07:53,850 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-20 06:07:53,872 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-20 06:07:53,873 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-20 06:07:53,873 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-20 06:07:53,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:53,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-20 06:07:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:07:53,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1411444179] [2020-10-20 06:07:53,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:07:53,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-20 06:07:53,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413056908] [2020-10-20 06:07:53,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:07:53,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-20 06:07:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:07:53,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:07:53,998 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 6 states. [2020-10-20 06:07:54,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:07:54,355 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-10-20 06:07:54,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-20 06:07:54,370 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-20 06:07:54,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:07:54,373 INFO L225 Difference]: With dead ends: 74 [2020-10-20 06:07:54,373 INFO L226 Difference]: Without dead ends: 74 [2020-10-20 06:07:54,373 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 [2020-10-20 06:07:54,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-20 06:07:54,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-10-20 06:07:54,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-20 06:07:54,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-10-20 06:07:54,381 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 10 [2020-10-20 06:07:54,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:07:54,381 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-10-20 06:07:54,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:07:54,381 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-10-20 06:07:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 06:07:54,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:07:54,382 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:07:54,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-20 06:07:54,594 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]=== [2020-10-20 06:07:54,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:07:54,595 INFO L82 PathProgramCache]: Analyzing trace with hash -544900418, now seen corresponding path program 1 times [2020-10-20 06:07:54,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-20 06:07:54,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1243387573] [2020-10-20 06:07:54,597 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 [2020-10-20 06:07:54,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:07:54,717 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:07:54,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-20 06:07:54,768 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-20 06:07:54,802 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-20 06:07:54,803 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-20 06:07:55,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-20 06:07:55,016 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-20 06:07:55,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:07:55 BoogieIcfgContainer [2020-10-20 06:07:55,031 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:07:55,031 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:07:55,031 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:07:55,032 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:07:55,032 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:07:52" (3/4) ... [2020-10-20 06:07:55,036 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-20 06:07:55,036 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:07:55,038 INFO L168 Benchmark]: Toolchain (without parser) took 4173.03 ms. Allocated memory was 35.1 MB in the beginning and 63.4 MB in the end (delta: 28.3 MB). Free memory was 13.5 MB in the beginning and 36.4 MB in the end (delta: -22.9 MB). Peak memory consumption was 5.5 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,039 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 33.6 MB. Free memory was 9.1 MB in the beginning and 9.0 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,040 INFO L168 Benchmark]: CACSL2BoogieTranslator took 598.40 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 12.6 MB in the beginning and 22.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,041 INFO L168 Benchmark]: Boogie Preprocessor took 107.24 ms. Allocated memory is still 45.1 MB. Free memory was 22.7 MB in the beginning and 19.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,042 INFO L168 Benchmark]: RCFGBuilder took 760.57 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 19.2 MB in the beginning and 14.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,043 INFO L168 Benchmark]: TraceAbstraction took 2691.33 ms. Allocated memory was 47.7 MB in the beginning and 63.4 MB in the end (delta: 15.7 MB). Free memory was 13.5 MB in the beginning and 37.0 MB in the end (delta: -23.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,043 INFO L168 Benchmark]: Witness Printer took 5.02 ms. Allocated memory is still 63.4 MB. Free memory was 37.0 MB in the beginning and 36.4 MB in the end (delta: 610.6 kB). Peak memory consumption was 610.6 kB. Max. memory is 14.3 GB. [2020-10-20 06:07:55,048 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 33.6 MB. Free memory was 9.1 MB in the beginning and 9.0 MB in the end (delta: 63.1 kB). Peak memory consumption was 63.1 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 598.40 ms. Allocated memory was 35.1 MB in the beginning and 45.1 MB in the end (delta: 10.0 MB). Free memory was 12.6 MB in the beginning and 22.7 MB in the end (delta: -10.0 MB). Peak memory consumption was 12.4 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 107.24 ms. Allocated memory is still 45.1 MB. Free memory was 22.7 MB in the beginning and 19.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 14.3 GB. * RCFGBuilder took 760.57 ms. Allocated memory was 45.1 MB in the beginning and 47.7 MB in the end (delta: 2.6 MB). Free memory was 19.2 MB in the beginning and 14.1 MB in the end (delta: 5.1 MB). Peak memory consumption was 12.3 MB. Max. memory is 14.3 GB. * TraceAbstraction took 2691.33 ms. Allocated memory was 47.7 MB in the beginning and 63.4 MB in the end (delta: 15.7 MB). Free memory was 13.5 MB in the beginning and 37.0 MB in the end (delta: -23.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 14.3 GB. * Witness Printer took 5.02 ms. Allocated memory is still 63.4 MB. Free memory was 37.0 MB in the beginning and 36.4 MB in the end (delta: 610.6 kB). Peak memory consumption was 610.6 kB. Max. memory is 14.3 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: 0.6s, 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, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 60 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s 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...