./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 906a4fb5 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple_built_from_end.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 279a162aa90145a7316b3266460570a8e3cad8e6 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx12G -Xms1G -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple_built_from_end.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 279a162aa90145a7316b3266460570a8e3cad8e6 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.1.25-906a4fb [2020-10-19 18:14:54,742 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:14:54,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:14:54,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:14:54,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:14:54,794 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:14:54,797 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:14:54,801 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:14:54,804 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:14:54,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:14:54,810 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:14:54,811 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:14:54,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:14:54,815 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:14:54,817 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:14:54,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:14:54,821 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:14:54,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:14:54,825 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:14:54,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:14:54,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:14:54,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:14:54,838 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:14:54,839 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:14:54,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:14:54,850 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:14:54,850 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:14:54,851 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:14:54,852 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:14:54,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:14:54,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:14:54,856 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:14:54,858 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:14:54,859 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:14:54,860 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:14:54,861 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:14:54,862 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:14:54,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:14:54,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:14:54,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:14:54,865 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:14:54,866 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2020-10-19 18:14:54,906 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:14:54,906 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:14:54,908 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:14:54,908 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:14:54,909 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:14:54,909 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:14:54,909 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:14:54,910 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:14:54,910 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:14:54,910 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:14:54,912 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:14:54,912 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:14:54,912 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:14:54,913 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:14:54,913 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:14:54,913 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:14:54,914 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:14:54,914 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:14:54,914 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:14:54,914 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:14:54,915 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:14:54,915 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:14:54,915 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:54,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:14:54,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:14:54,916 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 18:14:54,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 18:14:54,917 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:14:54,917 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 -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-10-19 18:14:55,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:14:55,256 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:14:55,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:14:55,262 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:14:55,262 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:14:55,263 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-19 18:14:55,349 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1265f884e/c7143314593b4489b27c8c8981dc1f9b/FLAG758fc3e0a [2020-10-19 18:14:55,928 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:14:55,929 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-19 18:14:55,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1265f884e/c7143314593b4489b27c8c8981dc1f9b/FLAG758fc3e0a [2020-10-19 18:14:56,252 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1265f884e/c7143314593b4489b27c8c8981dc1f9b [2020-10-19 18:14:56,256 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:14:56,265 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:14:56,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:56,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:14:56,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:14:56,273 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,277 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7468445 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56, skipping insertion in model container [2020-10-19 18:14:56,278 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,291 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:14:56,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:14:56,774 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:56,786 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:14:56,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:14:56,906 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:14:56,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56 WrapperNode [2020-10-19 18:14:56,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:14:56,908 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:14:56,908 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:14:56,908 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:14:56,921 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,921 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,937 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,961 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,965 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... [2020-10-19 18:14:56,971 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:14:56,972 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:14:56,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:14:56,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:14:56,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:14:57,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:14:57,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:14:57,053 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:14:57,053 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:14:57,056 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:14:57,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:14:57,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:14:57,058 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:14:57,058 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:14:57,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:14:57,060 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:14:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:14:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:14:57,061 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:14:57,062 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:14:57,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:14:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:14:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:14:57,066 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:14:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:14:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:14:57,067 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:14:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:14:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:14:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:14:57,068 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:14:57,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:14:57,069 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:14:57,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:14:57,070 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:14:57,071 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:14:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:14:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:14:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:14:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:14:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:14:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:14:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:14:57,073 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:14:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:14:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:14:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:14:57,074 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:14:57,075 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:14:57,075 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:14:57,075 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:14:57,075 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:14:57,075 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:14:57,076 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:14:57,076 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:14:57,076 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:14:57,076 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:14:57,077 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:14:57,077 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:14:57,077 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:14:57,078 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:14:57,078 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:14:57,078 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:14:57,079 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:14:57,079 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:14:57,080 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:14:57,080 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:14:57,080 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:14:57,081 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:14:57,081 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:14:57,081 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:14:57,082 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:14:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:14:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:14:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:14:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:14:57,083 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:14:57,084 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:14:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:14:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:14:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:14:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:14:57,085 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:14:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:14:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:14:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:14:57,086 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:14:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:14:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:14:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:14:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:14:57,087 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:14:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:14:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:14:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:14:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:14:57,088 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:14:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:14:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:14:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:14:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:14:57,089 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:14:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:14:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:14:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:14:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:14:57,090 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:14:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:14:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:14:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:14:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:14:57,091 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:14:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:14:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:14:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:14:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:14:57,092 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:14:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:14:57,093 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:14:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:14:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:14:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:14:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:14:57,094 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:14:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:14:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:14:57,095 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:14:57,096 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:14:57,096 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:14:57,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:14:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:14:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 18:14:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:14:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 18:14:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:14:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:14:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 18:14:57,103 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:14:57,104 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:14:57,522 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:14:57,660 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:14:57,660 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 18:14:57,663 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:57 BoogieIcfgContainer [2020-10-19 18:14:57,663 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:14:57,664 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:14:57,665 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:14:57,668 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:14:57,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:14:56" (1/3) ... [2020-10-19 18:14:57,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374053e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:14:57, skipping insertion in model container [2020-10-19 18:14:57,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:14:56" (2/3) ... [2020-10-19 18:14:57,670 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3374053e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:14:57, skipping insertion in model container [2020-10-19 18:14:57,670 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:57" (3/3) ... [2020-10-19 18:14:57,672 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-19 18:14:57,684 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:14:57,693 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-19 18:14:57,706 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-19 18:14:57,723 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:14:57,724 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:14:57,724 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:14:57,724 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:14:57,724 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:14:57,725 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:14:57,725 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:14:57,725 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:14:57,740 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states. [2020-10-19 18:14:57,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:14:57,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:57,751 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:57,752 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:57,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash 691471212, now seen corresponding path program 1 times [2020-10-19 18:14:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:57,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397847214] [2020-10-19 18:14:57,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:57,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:57,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:57,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:57,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397847214] [2020-10-19 18:14:57,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:57,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:14:57,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313590956] [2020-10-19 18:14:57,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:14:57,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:57,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:14:57,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:14:57,992 INFO L87 Difference]: Start difference. First operand 40 states. Second operand 3 states. [2020-10-19 18:14:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:58,129 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2020-10-19 18:14:58,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:14:58,131 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:14:58,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:58,143 INFO L225 Difference]: With dead ends: 51 [2020-10-19 18:14:58,144 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:14:58,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:14:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:14:58,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2020-10-19 18:14:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-19 18:14:58,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2020-10-19 18:14:58,193 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 9 [2020-10-19 18:14:58,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:58,193 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2020-10-19 18:14:58,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:14:58,194 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2020-10-19 18:14:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:14:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:58,195 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:58,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 18:14:58,196 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:58,197 INFO L82 PathProgramCache]: Analyzing trace with hash -39877821, now seen corresponding path program 1 times [2020-10-19 18:14:58,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:58,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772033923] [2020-10-19 18:14:58,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:58,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772033923] [2020-10-19 18:14:58,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:58,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:14:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304872108] [2020-10-19 18:14:58,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:14:58,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:58,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:14:58,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:14:58,335 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 4 states. [2020-10-19 18:14:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:58,465 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2020-10-19 18:14:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:14:58,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:14:58,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:58,468 INFO L225 Difference]: With dead ends: 41 [2020-10-19 18:14:58,468 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:14:58,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:14:58,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:14:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-19 18:14:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 18:14:58,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-19 18:14:58,477 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 10 [2020-10-19 18:14:58,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:58,477 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-19 18:14:58,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:14:58,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-19 18:14:58,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:14:58,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:58,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:58,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-19 18:14:58,480 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:58,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:58,480 INFO L82 PathProgramCache]: Analyzing trace with hash -39877820, now seen corresponding path program 1 times [2020-10-19 18:14:58,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:58,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130875118] [2020-10-19 18:14:58,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:58,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:58,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130875118] [2020-10-19 18:14:58,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:58,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 18:14:58,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753479127] [2020-10-19 18:14:58,586 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:14:58,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:58,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:14:58,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:14:58,588 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 4 states. [2020-10-19 18:14:58,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:58,700 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2020-10-19 18:14:58,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:14:58,701 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:14:58,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:58,702 INFO L225 Difference]: With dead ends: 39 [2020-10-19 18:14:58,702 INFO L226 Difference]: Without dead ends: 39 [2020-10-19 18:14:58,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:14:58,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-19 18:14:58,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-10-19 18:14:58,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 18:14:58,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-19 18:14:58,710 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 10 [2020-10-19 18:14:58,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:58,710 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-19 18:14:58,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:14:58,711 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-19 18:14:58,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-19 18:14:58,712 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:58,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:58,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-19 18:14:58,713 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:58,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:58,713 INFO L82 PathProgramCache]: Analyzing trace with hash -39879136, now seen corresponding path program 1 times [2020-10-19 18:14:58,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:58,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786590222] [2020-10-19 18:14:58,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:58,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:58,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786590222] [2020-10-19 18:14:58,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:58,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:14:58,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898250048] [2020-10-19 18:14:58,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:14:58,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:58,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:14:58,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:14:58,792 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2020-10-19 18:14:58,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:58,880 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-10-19 18:14:58,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:58,881 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-19 18:14:58,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:58,882 INFO L225 Difference]: With dead ends: 34 [2020-10-19 18:14:58,882 INFO L226 Difference]: Without dead ends: 33 [2020-10-19 18:14:58,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:58,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-19 18:14:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2020-10-19 18:14:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:14:58,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-19 18:14:58,889 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 10 [2020-10-19 18:14:58,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:58,890 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-19 18:14:58,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:14:58,890 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-19 18:14:58,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:14:58,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:58,892 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:58,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-19 18:14:58,892 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:58,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:58,893 INFO L82 PathProgramCache]: Analyzing trace with hash -905845953, now seen corresponding path program 1 times [2020-10-19 18:14:58,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:58,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088207225] [2020-10-19 18:14:58,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:58,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:58,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:58,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088207225] [2020-10-19 18:14:58,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:58,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-19 18:14:58,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225927157] [2020-10-19 18:14:58,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:14:58,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:58,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:14:58,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:58,989 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 5 states. [2020-10-19 18:14:59,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:59,101 INFO L93 Difference]: Finished difference Result 43 states and 45 transitions. [2020-10-19 18:14:59,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:59,102 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 18:14:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:59,103 INFO L225 Difference]: With dead ends: 43 [2020-10-19 18:14:59,104 INFO L226 Difference]: Without dead ends: 43 [2020-10-19 18:14:59,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:59,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-19 18:14:59,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-10-19 18:14:59,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:14:59,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-19 18:14:59,110 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 16 [2020-10-19 18:14:59,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:59,111 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-19 18:14:59,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:14:59,112 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-19 18:14:59,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:14:59,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:59,113 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:59,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-19 18:14:59,114 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash -905845910, now seen corresponding path program 1 times [2020-10-19 18:14:59,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:59,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400997792] [2020-10-19 18:14:59,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:59,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:59,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400997792] [2020-10-19 18:14:59,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:59,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:14:59,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589112679] [2020-10-19 18:14:59,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:14:59,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:59,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:14:59,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:59,221 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 5 states. [2020-10-19 18:14:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:59,354 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-19 18:14:59,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:59,355 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 18:14:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:59,356 INFO L225 Difference]: With dead ends: 35 [2020-10-19 18:14:59,357 INFO L226 Difference]: Without dead ends: 35 [2020-10-19 18:14:59,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:59,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-19 18:14:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-19 18:14:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:14:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-19 18:14:59,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 16 [2020-10-19 18:14:59,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:59,371 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-19 18:14:59,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:14:59,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-19 18:14:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-19 18:14:59,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:59,375 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:59,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-19 18:14:59,376 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:59,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:59,377 INFO L82 PathProgramCache]: Analyzing trace with hash -905845909, now seen corresponding path program 1 times [2020-10-19 18:14:59,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:59,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198398714] [2020-10-19 18:14:59,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:59,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198398714] [2020-10-19 18:14:59,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:59,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 18:14:59,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353764304] [2020-10-19 18:14:59,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 18:14:59,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:59,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 18:14:59,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:14:59,563 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 5 states. [2020-10-19 18:14:59,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:59,686 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-10-19 18:14:59,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:14:59,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-19 18:14:59,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:59,687 INFO L225 Difference]: With dead ends: 38 [2020-10-19 18:14:59,687 INFO L226 Difference]: Without dead ends: 38 [2020-10-19 18:14:59,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:59,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-19 18:14:59,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-10-19 18:14:59,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 18:14:59,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-10-19 18:14:59,692 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-10-19 18:14:59,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:59,692 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-10-19 18:14:59,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 18:14:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-10-19 18:14:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 18:14:59,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:59,694 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:59,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-19 18:14:59,694 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:59,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:59,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1715336483, now seen corresponding path program 1 times [2020-10-19 18:14:59,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:59,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148220242] [2020-10-19 18:14:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:59,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-19 18:14:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:14:59,785 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:14:59,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148220242] [2020-10-19 18:14:59,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:14:59,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-19 18:14:59,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700141178] [2020-10-19 18:14:59,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:14:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 18:14:59,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:14:59,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:14:59,787 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-10-19 18:14:59,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:14:59,895 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-10-19 18:14:59,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:14:59,895 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-19 18:14:59,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:14:59,896 INFO L225 Difference]: With dead ends: 36 [2020-10-19 18:14:59,896 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 18:14:59,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:14:59,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 18:14:59,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2020-10-19 18:14:59,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-19 18:14:59,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-10-19 18:14:59,900 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 20 [2020-10-19 18:14:59,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:14:59,901 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-10-19 18:14:59,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:14:59,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-10-19 18:14:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-19 18:14:59,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:14:59,902 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:14:59,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-19 18:14:59,902 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:14:59,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:14:59,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1639972725, now seen corresponding path program 1 times [2020-10-19 18:14:59,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 18:14:59,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147565556] [2020-10-19 18:14:59,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 18:14:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:14:59,920 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:14:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:14:59,933 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:14:59,991 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 18:14:59,991 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:14:59,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-19 18:15:00,030 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:15:00,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:15:00 BoogieIcfgContainer [2020-10-19 18:15:00,058 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:15:00,058 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:15:00,059 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:15:00,059 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:15:00,059 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:14:57" (3/4) ... [2020-10-19 18:15:00,064 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:15:00,064 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:15:00,067 INFO L168 Benchmark]: Toolchain (without parser) took 3808.23 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 958.6 MB in the beginning and 865.2 MB in the end (delta: 93.4 MB). Peak memory consumption was 234.9 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:00,068 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:00,069 INFO L168 Benchmark]: CACSL2BoogieTranslator took 640.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -162.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:00,069 INFO L168 Benchmark]: Boogie Preprocessor took 64.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:00,070 INFO L168 Benchmark]: RCFGBuilder took 690.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:00,071 INFO L168 Benchmark]: TraceAbstraction took 2393.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 865.2 MB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:00,071 INFO L168 Benchmark]: Witness Printer took 5.78 ms. Allocated memory is still 1.2 GB. Free memory is still 865.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:00,075 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 640.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 141.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -162.8 MB). Peak memory consumption was 26.0 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 64.12 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 690.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 50.8 MB). Peak memory consumption was 50.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 2393.69 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 865.2 MB in the end (delta: 200.0 MB). Peak memory consumption was 200.0 MB. Max. memory is 11.5 GB. * Witness Printer took 5.78 ms. Allocated memory is still 1.2 GB. Free memory is still 865.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L536] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L537] t->h = 1 VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L538] t->n = p VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] [L539] p = t VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, t={-1:0}] [L542] EXPR p->h VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->h=1, t={-1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [malloc(sizeof(struct node))={-1:0}, p={-1:0}, p->n={0:0}, t={-1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={-1:0}, p={0:0}, t={-1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 56 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.2s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 175 SDtfs, 224 SDslu, 98 SDs, 0 SdLazy, 458 SolverSat, 37 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=40occurred 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, 8 MinimizatonAttempts, 47 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 128 NumberOfCodeBlocks, 128 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 99 ConstructedInterpolants, 0 QuantifiedInterpolants, 6454 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.25-906a4fb [2020-10-19 18:15:02,242 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 18:15:02,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 18:15:02,293 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 18:15:02,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 18:15:02,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 18:15:02,308 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 18:15:02,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 18:15:02,315 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 18:15:02,320 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 18:15:02,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 18:15:02,324 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 18:15:02,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 18:15:02,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 18:15:02,331 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 18:15:02,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 18:15:02,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 18:15:02,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 18:15:02,341 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 18:15:02,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 18:15:02,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 18:15:02,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 18:15:02,355 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 18:15:02,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 18:15:02,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 18:15:02,365 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 18:15:02,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 18:15:02,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 18:15:02,369 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 18:15:02,370 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 18:15:02,370 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 18:15:02,371 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 18:15:02,375 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 18:15:02,375 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 18:15:02,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 18:15:02,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 18:15:02,381 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 18:15:02,381 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 18:15:02,381 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 18:15:02,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 18:15:02,384 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 18:15:02,385 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2020-10-19 18:15:02,431 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 18:15:02,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 18:15:02,434 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 18:15:02,434 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 18:15:02,435 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 18:15:02,435 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 18:15:02,435 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 18:15:02,436 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-19 18:15:02,436 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 18:15:02,436 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 18:15:02,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 18:15:02,438 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-10-19 18:15:02,438 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-10-19 18:15:02,439 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-10-19 18:15:02,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 18:15:02,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-10-19 18:15:02,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-10-19 18:15:02,440 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-10-19 18:15:02,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 18:15:02,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 18:15:02,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 18:15:02,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 18:15:02,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 18:15:02,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 18:15:02,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:15:02,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 18:15:02,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 18:15:02,443 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2020-10-19 18:15:02,443 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-10-19 18:15:02,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 18:15:02,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-19 18:15:02,444 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 -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-10-19 18:15:02,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 18:15:02,852 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 18:15:02,857 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 18:15:02,859 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 18:15:02,859 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 18:15:02,860 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-19 18:15:02,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d72605842/22a0c35e948746e29dc136a11ffc14c9/FLAGd19f17f77 [2020-10-19 18:15:03,471 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 18:15:03,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-10-19 18:15:03,487 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d72605842/22a0c35e948746e29dc136a11ffc14c9/FLAGd19f17f77 [2020-10-19 18:15:03,766 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d72605842/22a0c35e948746e29dc136a11ffc14c9 [2020-10-19 18:15:03,770 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 18:15:03,778 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-19 18:15:03,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 18:15:03,780 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 18:15:03,784 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 18:15:03,785 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:15:03" (1/1) ... [2020-10-19 18:15:03,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2850a46e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:03, skipping insertion in model container [2020-10-19 18:15:03,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 06:15:03" (1/1) ... [2020-10-19 18:15:03,799 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 18:15:03,850 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 18:15:04,459 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:15:04,488 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 18:15:04,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 18:15:04,623 INFO L208 MainTranslator]: Completed translation [2020-10-19 18:15:04,624 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04 WrapperNode [2020-10-19 18:15:04,624 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 18:15:04,625 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 18:15:04,626 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 18:15:04,626 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 18:15:04,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,642 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,695 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... [2020-10-19 18:15:04,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 18:15:04,704 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 18:15:04,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 18:15:04,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 18:15:04,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 18:15:04,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-19 18:15:04,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 18:15:04,779 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 18:15:04,779 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2020-10-19 18:15:04,780 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-19 18:15:04,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-19 18:15:04,781 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-19 18:15:04,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-19 18:15:04,781 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-19 18:15:04,782 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-19 18:15:04,783 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-19 18:15:04,788 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-19 18:15:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-19 18:15:04,790 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-19 18:15:04,791 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2020-10-19 18:15:04,792 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-19 18:15:04,793 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-19 18:15:04,794 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-19 18:15:04,795 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-19 18:15:04,796 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-19 18:15:04,797 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-19 18:15:04,798 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-19 18:15:04,799 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-19 18:15:04,800 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-19 18:15:04,801 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-19 18:15:04,802 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-19 18:15:04,803 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-19 18:15:04,804 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-19 18:15:04,805 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-10-19 18:15:04,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 18:15:04,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2020-10-19 18:15:04,806 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-10-19 18:15:04,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-10-19 18:15:04,806 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 18:15:05,186 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-19 18:15:05,397 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 18:15:05,397 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-19 18:15:05,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:05 BoogieIcfgContainer [2020-10-19 18:15:05,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 18:15:05,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 18:15:05,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 18:15:05,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 18:15:05,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 06:15:03" (1/3) ... [2020-10-19 18:15:05,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122cbd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:15:05, skipping insertion in model container [2020-10-19 18:15:05,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 06:15:04" (2/3) ... [2020-10-19 18:15:05,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122cbd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 06:15:05, skipping insertion in model container [2020-10-19 18:15:05,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:05" (3/3) ... [2020-10-19 18:15:05,411 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-10-19 18:15:05,425 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 18:15:05,433 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-10-19 18:15:05,447 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-10-19 18:15:05,466 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 18:15:05,466 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-19 18:15:05,467 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 18:15:05,467 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 18:15:05,467 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 18:15:05,467 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 18:15:05,467 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 18:15:05,467 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 18:15:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-10-19 18:15:05,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:15:05,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:05,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:05,497 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:05,505 INFO L82 PathProgramCache]: Analyzing trace with hash -251734950, now seen corresponding path program 1 times [2020-10-19 18:15:05,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:05,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [312492105] [2020-10-19 18:15:05,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:05,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:05,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 1 conjunts are in the unsatisfiable core [2020-10-19 18:15:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:05,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:05,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:05,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [312492105] [2020-10-19 18:15:05,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:05,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 18:15:05,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516332350] [2020-10-19 18:15:05,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 18:15:05,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 18:15:05,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 18:15:05,788 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 2 states. [2020-10-19 18:15:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:05,811 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-19 18:15:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 18:15:05,813 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-10-19 18:15:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:05,825 INFO L225 Difference]: With dead ends: 36 [2020-10-19 18:15:05,826 INFO L226 Difference]: Without dead ends: 30 [2020-10-19 18:15:05,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 18:15:05,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-19 18:15:05,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-19 18:15:05,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:15:05,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-19 18:15:05,877 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 9 [2020-10-19 18:15:05,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:05,878 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-19 18:15:05,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 18:15:05,878 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-19 18:15:05,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:15:05,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:05,879 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:06,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-19 18:15:06,094 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:06,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:06,095 INFO L82 PathProgramCache]: Analyzing trace with hash -251735570, now seen corresponding path program 1 times [2020-10-19 18:15:06,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:06,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1160158929] [2020-10-19 18:15:06,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:06,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 18:15:06,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:06,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:06,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:06,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1160158929] [2020-10-19 18:15:06,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:06,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 18:15:06,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603423861] [2020-10-19 18:15:06,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:15:06,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:06,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:15:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:06,271 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 3 states. [2020-10-19 18:15:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:06,394 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2020-10-19 18:15:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:15:06,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:15:06,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:06,401 INFO L225 Difference]: With dead ends: 42 [2020-10-19 18:15:06,403 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:15:06,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:06,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:15:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2020-10-19 18:15:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-19 18:15:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2020-10-19 18:15:06,423 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 9 [2020-10-19 18:15:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:06,425 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2020-10-19 18:15:06,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:15:06,426 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2020-10-19 18:15:06,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:15:06,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:06,427 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:06,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-19 18:15:06,642 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:06,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -251735527, now seen corresponding path program 1 times [2020-10-19 18:15:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:06,645 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [119763216] [2020-10-19 18:15:06,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:06,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:06,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:15:06,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:06,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:06,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:06,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [119763216] [2020-10-19 18:15:06,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:06,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-19 18:15:06,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81893325] [2020-10-19 18:15:06,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:15:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:06,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:15:06,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:06,813 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand 3 states. [2020-10-19 18:15:06,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:06,871 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-10-19 18:15:06,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:15:06,872 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:15:06,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:06,873 INFO L225 Difference]: With dead ends: 40 [2020-10-19 18:15:06,873 INFO L226 Difference]: Without dead ends: 39 [2020-10-19 18:15:06,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:06,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-19 18:15:06,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-10-19 18:15:06,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-19 18:15:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-10-19 18:15:06,879 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 9 [2020-10-19 18:15:06,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:06,879 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-10-19 18:15:06,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:15:06,879 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-10-19 18:15:06,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:15:06,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:06,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:07,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-19 18:15:07,092 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:07,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:07,093 INFO L82 PathProgramCache]: Analyzing trace with hash -251734212, now seen corresponding path program 1 times [2020-10-19 18:15:07,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:07,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80728194] [2020-10-19 18:15:07,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:07,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 18:15:07,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:07,271 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:07,272 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:07,275 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:07,276 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:07,276 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-19 18:15:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:07,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:07,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80728194] [2020-10-19 18:15:07,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:07,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-10-19 18:15:07,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643577615] [2020-10-19 18:15:07,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 18:15:07,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:07,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 18:15:07,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:07,324 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 3 states. [2020-10-19 18:15:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:07,389 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-10-19 18:15:07,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:15:07,391 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-10-19 18:15:07,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:07,392 INFO L225 Difference]: With dead ends: 29 [2020-10-19 18:15:07,392 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 18:15:07,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 18:15:07,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 18:15:07,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-19 18:15:07,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-19 18:15:07,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-10-19 18:15:07,397 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 9 [2020-10-19 18:15:07,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:07,398 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-10-19 18:15:07,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 18:15:07,398 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-10-19 18:15:07,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-19 18:15:07,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:07,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:07,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-19 18:15:07,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:07,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash -251734211, now seen corresponding path program 1 times [2020-10-19 18:15:07,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:07,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715452652] [2020-10-19 18:15:07,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:07,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:07,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 18:15:07,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:07,731 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:07,732 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:07,739 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:07,739 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:07,740 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 18:15:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:07,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:07,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:07,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715452652] [2020-10-19 18:15:07,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:07,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-10-19 18:15:07,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96766271] [2020-10-19 18:15:07,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:15:07,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:07,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:15:07,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:15:07,824 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 4 states. [2020-10-19 18:15:07,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:07,898 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-10-19 18:15:07,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 18:15:07,899 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-10-19 18:15:07,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:07,900 INFO L225 Difference]: With dead ends: 27 [2020-10-19 18:15:07,900 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 18:15:07,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:15:07,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 18:15:07,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-19 18:15:07,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 18:15:07,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-10-19 18:15:07,905 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2020-10-19 18:15:07,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:07,906 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-10-19 18:15:07,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:15:07,906 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-10-19 18:15:07,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 18:15:07,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:07,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:08,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-19 18:15:08,120 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:08,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128460, now seen corresponding path program 1 times [2020-10-19 18:15:08,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:08,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [289551857] [2020-10-19 18:15:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:08,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:15:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:08,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:08,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [289551857] [2020-10-19 18:15:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:08,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-10-19 18:15:08,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860912829] [2020-10-19 18:15:08,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:15:08,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:08,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:15:08,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:15:08,264 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 4 states. [2020-10-19 18:15:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:08,419 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2020-10-19 18:15:08,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:15:08,420 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-19 18:15:08,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:08,420 INFO L225 Difference]: With dead ends: 41 [2020-10-19 18:15:08,421 INFO L226 Difference]: Without dead ends: 41 [2020-10-19 18:15:08,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:15:08,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-19 18:15:08,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2020-10-19 18:15:08,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 18:15:08,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-10-19 18:15:08,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 14 [2020-10-19 18:15:08,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:08,425 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-10-19 18:15:08,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:15:08,426 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-10-19 18:15:08,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 18:15:08,426 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:08,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:08,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-19 18:15:08,632 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:08,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:08,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128503, now seen corresponding path program 1 times [2020-10-19 18:15:08,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:08,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1163196219] [2020-10-19 18:15:08,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:08,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 18:15:08,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:08,754 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:08,754 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:08,764 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:08,764 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:08,764 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-10-19 18:15:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:08,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:08,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:08,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1163196219] [2020-10-19 18:15:08,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:08,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-10-19 18:15:08,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53554286] [2020-10-19 18:15:08,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 18:15:08,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:08,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 18:15:08,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-19 18:15:08,797 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 4 states. [2020-10-19 18:15:08,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:08,936 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-10-19 18:15:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 18:15:08,937 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-19 18:15:08,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:08,938 INFO L225 Difference]: With dead ends: 33 [2020-10-19 18:15:08,938 INFO L226 Difference]: Without dead ends: 33 [2020-10-19 18:15:08,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-19 18:15:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-19 18:15:08,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-10-19 18:15:08,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 18:15:08,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-19 18:15:08,942 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 14 [2020-10-19 18:15:08,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:08,942 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-19 18:15:08,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 18:15:08,942 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-19 18:15:08,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-19 18:15:08,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:08,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:09,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-19 18:15:09,153 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:09,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:09,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1208128504, now seen corresponding path program 1 times [2020-10-19 18:15:09,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:09,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1744876468] [2020-10-19 18:15:09,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-19 18:15:09,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:09,266 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-10-19 18:15:09,266 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:09,271 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:09,272 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:09,272 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-10-19 18:15:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:09,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:09,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1744876468] [2020-10-19 18:15:09,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:09,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-10-19 18:15:09,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050769001] [2020-10-19 18:15:09,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 18:15:09,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:09,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 18:15:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-19 18:15:09,396 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 6 states. [2020-10-19 18:15:09,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:09,625 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-10-19 18:15:09,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 18:15:09,627 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-10-19 18:15:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:09,628 INFO L225 Difference]: With dead ends: 36 [2020-10-19 18:15:09,628 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 18:15:09,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:15:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 18:15:09,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-10-19 18:15:09,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:15:09,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-10-19 18:15:09,633 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 14 [2020-10-19 18:15:09,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:09,634 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-10-19 18:15:09,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 18:15:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-10-19 18:15:09,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 18:15:09,634 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:09,634 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:09,841 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-10-19 18:15:09,842 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:09,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:09,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1674350128, now seen corresponding path program 1 times [2020-10-19 18:15:09,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:09,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686518404] [2020-10-19 18:15:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:09,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 18:15:09,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:09,971 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-10-19 18:15:09,971 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:09,974 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:09,974 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:09,974 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-10-19 18:15:10,003 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-10-19 18:15:10,003 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-10-19 18:15:10,004 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,007 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,008 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-10-19 18:15:10,026 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-10-19 18:15:10,028 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,031 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,031 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-10-19 18:15:10,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686518404] [2020-10-19 18:15:10,048 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2020-10-19 18:15:10,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [977756809] [2020-10-19 18:15:10,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 18:15:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 18:15:10,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-19 18:15:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 18:15:10,343 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 11 treesize of output 7 [2020-10-19 18:15:10,343 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,349 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,349 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,349 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-10-19 18:15:10,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-10-19 18:15:10,373 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-10-19 18:15:10,373 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,378 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,379 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:11 [2020-10-19 18:15:10,407 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-10-19 18:15:10,408 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,413 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,413 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-10-19 18:15:10,413 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2020-10-19 18:15:10,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:10,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-19 18:15:10,441 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:15:10,444 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-10-19 18:15:10,445 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-10-19 18:15:10,445 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2020-10-19 18:15:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 18:15:10,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-19 18:15:10,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 5] imperfect sequences [] total 8 [2020-10-19 18:15:10,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261764048] [2020-10-19 18:15:10,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 18:15:10,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2020-10-19 18:15:10,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 18:15:10,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-19 18:15:10,458 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-10-19 18:15:10,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 18:15:10,662 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-10-19 18:15:10,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 18:15:10,663 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-10-19 18:15:10,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 18:15:10,664 INFO L225 Difference]: With dead ends: 35 [2020-10-19 18:15:10,664 INFO L226 Difference]: Without dead ends: 35 [2020-10-19 18:15:10,664 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-19 18:15:10,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-19 18:15:10,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-10-19 18:15:10,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-19 18:15:10,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-10-19 18:15:10,668 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 18 [2020-10-19 18:15:10,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 18:15:10,668 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-10-19 18:15:10,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 18:15:10,668 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-10-19 18:15:10,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-19 18:15:10,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 18:15:10,669 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 18:15:11,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-19 18:15:11,071 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONMEMORY_LEAK, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION, mainErr5REQUIRES_VIOLATION, mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr6REQUIRES_VIOLATION, mainErr7REQUIRES_VIOLATION, mainErr8ENSURES_VIOLATIONMEMORY_LEAK]=== [2020-10-19 18:15:11,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 18:15:11,071 INFO L82 PathProgramCache]: Analyzing trace with hash -361076259, now seen corresponding path program 1 times [2020-10-19 18:15:11,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy WOLF [2020-10-19 18:15:11,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1954050572] [2020-10-19 18:15:11,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-19 18:15:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:15:11,180 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:15:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 18:15:11,223 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 18:15:11,252 INFO L173 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2020-10-19 18:15:11,253 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 18:15:11,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 mathsat -unsat_core_generation=3 [2020-10-19 18:15:11,470 WARN L417 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2020-10-19 18:15:11,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 06:15:11 BoogieIcfgContainer [2020-10-19 18:15:11,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 18:15:11,486 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 18:15:11,486 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 18:15:11,486 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 18:15:11,487 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 06:15:05" (3/4) ... [2020-10-19 18:15:11,490 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-10-19 18:15:11,491 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 18:15:11,492 INFO L168 Benchmark]: Toolchain (without parser) took 7720.22 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 210.2 MB). Free memory was 958.6 MB in the beginning and 952.5 MB in the end (delta: 6.1 MB). Peak memory consumption was 216.4 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:11,493 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:11,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 845.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:11,494 INFO L168 Benchmark]: Boogie Preprocessor took 78.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:11,494 INFO L168 Benchmark]: RCFGBuilder took 696.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:11,495 INFO L168 Benchmark]: TraceAbstraction took 6083.48 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.0 GB in the beginning and 952.5 MB in the end (delta: 94.5 MB). Peak memory consumption was 172.1 MB. Max. memory is 11.5 GB. [2020-10-19 18:15:11,496 INFO L168 Benchmark]: Witness Printer took 5.09 ms. Allocated memory is still 1.2 GB. Free memory is still 952.5 MB. There was no memory consumed. Max. memory is 11.5 GB. [2020-10-19 18:15:11,498 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 1.0 GB. Free memory is still 985.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 845.73 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 132.6 MB). Free memory was 953.2 MB in the beginning and 1.1 GB in the end (delta: -146.5 MB). Peak memory consumption was 20.5 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 78.51 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 696.01 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 52.8 MB). Peak memory consumption was 52.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 6083.48 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 77.6 MB). Free memory was 1.0 GB in the beginning and 952.5 MB in the end (delta: 94.5 MB). Peak memory consumption was 172.1 MB. Max. memory is 11.5 GB. * Witness Printer took 5.09 ms. Allocated memory is still 1.2 GB. Free memory is still 952.5 MB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; VAL [p={0:0}] [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L536] COND FALSE !(t == 0) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L537] t->h = 1 VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L538] t->n = p VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] [L539] p = t VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, t={1:0}] [L542] EXPR p->h VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, p->h=1, t={1:0}] [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n VAL [malloc(sizeof(struct node))={1:0}, p={1:0}, p->n={0:0}, t={1:0}] [L545] p = p->n [L541] COND FALSE !(p!=0) VAL [malloc(sizeof(struct node))={1:0}, p={0:0}, t={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 61 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.9s, OverallIterations: 10, TraceHistogramMax: 1, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 198 SDtfs, 202 SDslu, 156 SDs, 0 SdLazy, 228 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 222 GetRequests, 192 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred 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, 9 MinimizatonAttempts, 42 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 192 ConstructedInterpolants, 0 QuantifiedInterpolants, 8348 SizeOfPredicates, 24 NumberOfNonLiveVariables, 627 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 8/8 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...