./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_remove_all.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-simple/sll2n_remove_all.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 f7d8c0c2bedd5f6035fbcd638269863119be7003 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 07:31:43,737 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:31:43,739 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:31:43,768 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:31:43,769 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:31:43,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:31:43,772 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:31:43,776 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:31:43,777 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:31:43,780 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:31:43,781 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:31:43,784 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:31:43,784 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:31:43,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:31:43,787 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:31:43,789 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:31:43,790 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:31:43,790 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:31:43,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:31:43,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:31:43,799 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:31:43,799 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:31:43,800 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:31:43,801 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:31:43,810 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:31:43,810 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:31:43,810 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:31:43,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:31:43,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:31:43,812 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:31:43,812 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:31:43,813 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:31:43,814 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:31:43,814 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:31:43,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:31:43,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:31:43,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:31:43,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:31:43,816 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:31:43,817 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:31:43,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:31:43,819 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:31:43,846 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:31:43,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:31:43,847 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:31:43,847 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:31:43,849 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:31:43,849 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:31:43,849 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:31:43,849 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:31:43,849 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:31:43,850 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:31:43,850 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:31:43,850 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:31:43,850 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:31:43,851 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:31:43,857 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:31:43,857 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:31:43,857 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:31:43,857 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:31:43,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:31:43,857 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:31:43,858 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:31:43,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:31:43,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:31:43,858 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:31:43,858 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d8c0c2bedd5f6035fbcd638269863119be7003 [2021-08-27 07:31:44,093 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:31:44,106 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:31:44,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:31:44,109 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:31:44,109 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:31:44,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-08-27 07:31:44,158 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18ca947f6/5ba14fd469bf413c81c9194ddffc30d0/FLAGda3ae781e [2021-08-27 07:31:44,520 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:31:44,520 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all.i [2021-08-27 07:31:44,536 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18ca947f6/5ba14fd469bf413c81c9194ddffc30d0/FLAGda3ae781e [2021-08-27 07:31:44,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18ca947f6/5ba14fd469bf413c81c9194ddffc30d0 [2021-08-27 07:31:44,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:31:44,904 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:31:44,905 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:31:44,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:31:44,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:31:44,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:31:44" (1/1) ... [2021-08-27 07:31:44,909 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dc331cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:44, skipping insertion in model container [2021-08-27 07:31:44,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:31:44" (1/1) ... [2021-08-27 07:31:44,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:31:44,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:31:45,135 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-08-27 07:31:45,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:31:45,146 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:31:45,185 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_remove_all.i[23806,23819] [2021-08-27 07:31:45,185 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:31:45,204 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:31:45,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45 WrapperNode [2021-08-27 07:31:45,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:31:45,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:31:45,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:31:45,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:31:45,216 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,226 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,235 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,244 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:31:45,245 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:31:45,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:31:45,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:31:45,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (1/1) ... [2021-08-27 07:31:45,260 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:31:45,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:45,278 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 07:31:45,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 07:31:45,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 07:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 07:31:45,317 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 07:31:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 07:31:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-08-27 07:31:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2021-08-27 07:31:45,318 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_remove_first [2021-08-27 07:31:45,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:31:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:31:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 07:31:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 07:31:45,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 07:31:45,321 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 07:31:45,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 07:31:45,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 07:31:45,324 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 07:31:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 07:31:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 07:31:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 07:31:45,325 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 07:31:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 07:31:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 07:31:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 07:31:45,326 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 07:31:45,327 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 07:31:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 07:31:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 07:31:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 07:31:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 07:31:45,328 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 07:31:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 07:31:45,329 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 07:31:45,330 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 07:31:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 07:31:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 07:31:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 07:31:45,331 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 07:31:45,332 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 07:31:45,333 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 07:31:45,334 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 07:31:45,335 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 07:31:45,336 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-08-27 07:31:45,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 07:31:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 07:31:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 07:31:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2021-08-27 07:31:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure sll_remove_first [2021-08-27 07:31:45,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 07:31:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:31:45,340 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:31:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-27 07:31:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:31:45,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 07:31:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:31:45,342 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 07:31:45,757 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 07:31:45,955 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:31:45,959 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 07:31:45,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:31:45 BoogieIcfgContainer [2021-08-27 07:31:45,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:31:45,963 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:31:45,963 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:31:45,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:31:45,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:31:44" (1/3) ... [2021-08-27 07:31:45,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601576b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:31:45, skipping insertion in model container [2021-08-27 07:31:45,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:31:45" (2/3) ... [2021-08-27 07:31:45,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@601576b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:31:45, skipping insertion in model container [2021-08-27 07:31:45,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:31:45" (3/3) ... [2021-08-27 07:31:45,967 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_remove_all.i [2021-08-27 07:31:45,971 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:31:45,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 21 error locations. [2021-08-27 07:31:46,006 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:31:46,012 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 07:31:46,012 INFO L340 AbstractCegarLoop]: Starting to check reachability of 21 error locations. [2021-08-27 07:31:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:31:46,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 07:31:46,028 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:46,028 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:46,028 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:46,032 INFO L82 PathProgramCache]: Analyzing trace with hash 692301555, now seen corresponding path program 1 times [2021-08-27 07:31:46,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:46,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438516779] [2021-08-27 07:31:46,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:46,038 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:46,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:46,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438516779] [2021-08-27 07:31:46,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438516779] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:46,243 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:46,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:31:46,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924969298] [2021-08-27 07:31:46,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:31:46,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:46,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:31:46,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:31:46,261 INFO L87 Difference]: Start difference. First operand has 70 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 58 states have internal predecessors, (64), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:31:46,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:46,409 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2021-08-27 07:31:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:31:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 07:31:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:46,418 INFO L225 Difference]: With dead ends: 73 [2021-08-27 07:31:46,418 INFO L226 Difference]: Without dead ends: 67 [2021-08-27 07:31:46,420 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:31:46,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-08-27 07:31:46,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2021-08-27 07:31:46,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:31:46,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2021-08-27 07:31:46,454 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 13 [2021-08-27 07:31:46,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:46,454 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2021-08-27 07:31:46,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:31:46,455 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2021-08-27 07:31:46,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-27 07:31:46,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:46,455 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:46,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:31:46,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:46,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:46,456 INFO L82 PathProgramCache]: Analyzing trace with hash 692301556, now seen corresponding path program 1 times [2021-08-27 07:31:46,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:46,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790005589] [2021-08-27 07:31:46,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:46,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:46,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:46,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:46,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:46,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790005589] [2021-08-27 07:31:46,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790005589] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:46,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:46,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:31:46,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035929830] [2021-08-27 07:31:46,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:31:46,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:31:46,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:31:46,578 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:31:46,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:46,696 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-08-27 07:31:46,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:31:46,697 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-08-27 07:31:46,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:46,700 INFO L225 Difference]: With dead ends: 65 [2021-08-27 07:31:46,700 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 07:31:46,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.3ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:31:46,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 07:31:46,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2021-08-27 07:31:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.5294117647058822) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:31:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-27 07:31:46,713 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 13 [2021-08-27 07:31:46,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:46,714 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-27 07:31:46,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:31:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-27 07:31:46,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:31:46,714 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:46,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:46,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:31:46,715 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:46,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:46,716 INFO L82 PathProgramCache]: Analyzing trace with hash -44128920, now seen corresponding path program 1 times [2021-08-27 07:31:46,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:46,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848814357] [2021-08-27 07:31:46,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:46,717 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:46,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:46,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:46,843 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:46,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848814357] [2021-08-27 07:31:46,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848814357] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:46,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:46,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:31:46,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450403847] [2021-08-27 07:31:46,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:31:46,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:46,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:31:46,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:31:46,846 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:31:47,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:47,035 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-08-27 07:31:47,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:31:47,036 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2021-08-27 07:31:47,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:47,038 INFO L225 Difference]: With dead ends: 71 [2021-08-27 07:31:47,038 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 07:31:47,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:31:47,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 07:31:47,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2021-08-27 07:31:47,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 35 states have (on average 1.5142857142857142) internal successors, (53), 51 states have internal predecessors, (53), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:31:47,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-08-27 07:31:47,047 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 15 [2021-08-27 07:31:47,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:47,048 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-08-27 07:31:47,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:31:47,048 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-08-27 07:31:47,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:31:47,049 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:47,049 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:47,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:31:47,049 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting sll_createErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:47,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:47,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1141220174, now seen corresponding path program 1 times [2021-08-27 07:31:47,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:47,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542065610] [2021-08-27 07:31:47,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:47,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:47,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 07:31:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:47,152 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:47,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542065610] [2021-08-27 07:31:47,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542065610] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:47,155 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:47,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:31:47,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086294224] [2021-08-27 07:31:47,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:31:47,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:47,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:31:47,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:31:47,157 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:31:47,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:47,345 INFO L93 Difference]: Finished difference Result 61 states and 63 transitions. [2021-08-27 07:31:47,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:31:47,345 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-08-27 07:31:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:47,346 INFO L225 Difference]: With dead ends: 61 [2021-08-27 07:31:47,346 INFO L226 Difference]: Without dead ends: 61 [2021-08-27 07:31:47,346 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:31:47,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-27 07:31:47,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2021-08-27 07:31:47,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.4857142857142858) internal successors, (52), 50 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:31:47,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-27 07:31:47,352 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 19 [2021-08-27 07:31:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-27 07:31:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:31:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-27 07:31:47,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 07:31:47,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:47,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:47,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:31:47,353 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting sll_createErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:47,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:47,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1141220173, now seen corresponding path program 1 times [2021-08-27 07:31:47,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:47,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71618637] [2021-08-27 07:31:47,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:47,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-08-27 07:31:47,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:47,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:47,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71618637] [2021-08-27 07:31:47,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71618637] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:47,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:47,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:31:47,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662231706] [2021-08-27 07:31:47,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:31:47,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:47,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:31:47,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:31:47,455 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:31:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:47,623 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2021-08-27 07:31:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:31:47,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2021-08-27 07:31:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:47,625 INFO L225 Difference]: With dead ends: 60 [2021-08-27 07:31:47,625 INFO L226 Difference]: Without dead ends: 60 [2021-08-27 07:31:47,626 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:31:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-27 07:31:47,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-08-27 07:31:47,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 35 states have (on average 1.457142857142857) internal successors, (51), 49 states have internal predecessors, (51), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:31:47,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-08-27 07:31:47,638 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 19 [2021-08-27 07:31:47,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:47,638 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-08-27 07:31:47,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:31:47,639 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-08-27 07:31:47,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-27 07:31:47,640 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:47,640 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:47,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 07:31:47,640 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:47,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:47,641 INFO L82 PathProgramCache]: Analyzing trace with hash 716638674, now seen corresponding path program 1 times [2021-08-27 07:31:47,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:47,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938287014] [2021-08-27 07:31:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:47,643 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:47,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:47,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:47,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938287014] [2021-08-27 07:31:47,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938287014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:47,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171360900] [2021-08-27 07:31:47,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:47,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:47,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:47,785 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:47,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-27 07:31:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:47,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:31:47,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:48,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:31:48,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171360900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:48,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:31:48,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-08-27 07:31:48,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30811856] [2021-08-27 07:31:48,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 07:31:48,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:48,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 07:31:48,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:31:48,097 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:31:48,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:48,297 INFO L93 Difference]: Finished difference Result 73 states and 76 transitions. [2021-08-27 07:31:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:31:48,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2021-08-27 07:31:48,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:48,298 INFO L225 Difference]: With dead ends: 73 [2021-08-27 07:31:48,299 INFO L226 Difference]: Without dead ends: 70 [2021-08-27 07:31:48,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:31:48,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-08-27 07:31:48,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 65. [2021-08-27 07:31:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 40 states have (on average 1.4) internal successors, (56), 54 states have internal predecessors, (56), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:31:48,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-08-27 07:31:48,305 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 28 [2021-08-27 07:31:48,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:48,306 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-08-27 07:31:48,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:31:48,307 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-08-27 07:31:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 07:31:48,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:48,309 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:48,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-27 07:31:48,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-27 07:31:48,517 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1795776088, now seen corresponding path program 2 times [2021-08-27 07:31:48,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:48,518 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160313930] [2021-08-27 07:31:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:48,518 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:48,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:48,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:48,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:48,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,605 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:31:48,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:48,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160313930] [2021-08-27 07:31:48,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160313930] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:48,606 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:48,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 07:31:48,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682262346] [2021-08-27 07:31:48,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:31:48,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:48,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:31:48,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:31:48,607 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:31:48,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:48,715 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2021-08-27 07:31:48,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 07:31:48,715 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-08-27 07:31:48,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:48,717 INFO L225 Difference]: With dead ends: 68 [2021-08-27 07:31:48,717 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 07:31:48,717 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:31:48,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 07:31:48,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-08-27 07:31:48,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 55 states have internal predecessors, (57), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:31:48,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-08-27 07:31:48,720 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 41 [2021-08-27 07:31:48,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:48,722 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-08-27 07:31:48,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:31:48,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-08-27 07:31:48,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 07:31:48,724 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:48,724 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:48,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 07:31:48,725 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:48,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:48,725 INFO L82 PathProgramCache]: Analyzing trace with hash 836136051, now seen corresponding path program 1 times [2021-08-27 07:31:48,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:48,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717036092] [2021-08-27 07:31:48,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:48,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:48,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:48,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:49,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:49,108 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 07:31:49,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717036092] [2021-08-27 07:31:49,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717036092] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:49,109 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984245422] [2021-08-27 07:31:49,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:49,109 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:49,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:49,110 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:49,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-27 07:31:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:49,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-27 07:31:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:49,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:31:49,627 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 07:31:49,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 20 treesize of output 19 [2021-08-27 07:31:49,654 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:31:49,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984245422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:49,654 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:31:49,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-27 07:31:49,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386409426] [2021-08-27 07:31:49,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 07:31:49,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:49,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 07:31:49,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-27 07:31:49,657 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 07:31:50,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:50,321 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2021-08-27 07:31:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:31:50,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2021-08-27 07:31:50,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:50,322 INFO L225 Difference]: With dead ends: 94 [2021-08-27 07:31:50,322 INFO L226 Difference]: Without dead ends: 94 [2021-08-27 07:31:50,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 464.1ms TimeCoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2021-08-27 07:31:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-08-27 07:31:50,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2021-08-27 07:31:50,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 65 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2021-08-27 07:31:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 85 transitions. [2021-08-27 07:31:50,325 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 85 transitions. Word has length 43 [2021-08-27 07:31:50,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:50,325 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 85 transitions. [2021-08-27 07:31:50,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 14 states have internal predecessors, (53), 5 states have call successors, (10), 5 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 07:31:50,326 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 85 transitions. [2021-08-27 07:31:50,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-27 07:31:50,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:50,326 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:50,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-27 07:31:50,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-08-27 07:31:50,529 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting sll_remove_firstErr1REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:50,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:50,529 INFO L82 PathProgramCache]: Analyzing trace with hash 836136052, now seen corresponding path program 1 times [2021-08-27 07:31:50,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:50,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531531768] [2021-08-27 07:31:50,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:50,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:50,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:50,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:50,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:50,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:50,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:50,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:50,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:50,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 07:31:50,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:50,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531531768] [2021-08-27 07:31:50,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531531768] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:50,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796987457] [2021-08-27 07:31:50,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:50,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:50,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:50,864 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:50,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-27 07:31:51,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:51,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-27 07:31:51,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:51,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:31:51,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 7 [2021-08-27 07:31:51,522 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 07:31:51,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 25 treesize of output 29 [2021-08-27 07:31:51,652 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-27 07:31:51,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796987457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:51,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:31:51,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-08-27 07:31:51,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802655052] [2021-08-27 07:31:51,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-27 07:31:51,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:51,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-27 07:31:51,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:31:51,654 INFO L87 Difference]: Start difference. First operand 79 states and 85 transitions. Second operand has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:31:52,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:52,226 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-08-27 07:31:52,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-27 07:31:52,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 43 [2021-08-27 07:31:52,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:52,228 INFO L225 Difference]: With dead ends: 107 [2021-08-27 07:31:52,228 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 07:31:52,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=132, Invalid=518, Unknown=0, NotChecked=0, Total=650 [2021-08-27 07:31:52,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 07:31:52,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 94. [2021-08-27 07:31:52,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 65 states have (on average 1.3846153846153846) internal successors, (90), 78 states have internal predecessors, (90), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-08-27 07:31:52,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 108 transitions. [2021-08-27 07:31:52,231 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 108 transitions. Word has length 43 [2021-08-27 07:31:52,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:52,231 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 108 transitions. [2021-08-27 07:31:52,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 8 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:31:52,231 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 108 transitions. [2021-08-27 07:31:52,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:31:52,232 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:52,232 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:52,261 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-27 07:31:52,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:52,433 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:52,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:52,433 INFO L82 PathProgramCache]: Analyzing trace with hash 150413864, now seen corresponding path program 1 times [2021-08-27 07:31:52,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:52,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627067385] [2021-08-27 07:31:52,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:52,434 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:52,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:52,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:52,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:52,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:52,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:52,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:52,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:52,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:52,603 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-27 07:31:52,604 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:52,604 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627067385] [2021-08-27 07:31:52,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627067385] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:52,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:52,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:31:52,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457137421] [2021-08-27 07:31:52,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:31:52,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:52,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:31:52,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:31:52,605 INFO L87 Difference]: Start difference. First operand 94 states and 108 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:53,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:53,014 INFO L93 Difference]: Finished difference Result 116 states and 135 transitions. [2021-08-27 07:31:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 07:31:53,015 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-08-27 07:31:53,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:53,016 INFO L225 Difference]: With dead ends: 116 [2021-08-27 07:31:53,016 INFO L226 Difference]: Without dead ends: 116 [2021-08-27 07:31:53,016 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 235.5ms TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-08-27 07:31:53,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-27 07:31:53,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 99. [2021-08-27 07:31:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.4202898550724639) internal successors, (98), 82 states have internal predecessors, (98), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2021-08-27 07:31:53,020 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 44 [2021-08-27 07:31:53,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:53,021 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2021-08-27 07:31:53,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 10 states have internal predecessors, (31), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:53,021 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2021-08-27 07:31:53,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-27 07:31:53,024 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:53,024 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:53,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 07:31:53,024 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:53,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:53,025 INFO L82 PathProgramCache]: Analyzing trace with hash 150413865, now seen corresponding path program 1 times [2021-08-27 07:31:53,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:53,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077486881] [2021-08-27 07:31:53,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:53,025 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:53,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:53,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,252 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:31:53,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:53,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077486881] [2021-08-27 07:31:53,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077486881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:53,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:53,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:31:53,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136112453] [2021-08-27 07:31:53,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:31:53,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:31:53,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:31:53,254 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:53,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:53,725 INFO L93 Difference]: Finished difference Result 119 states and 138 transitions. [2021-08-27 07:31:53,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-27 07:31:53,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-08-27 07:31:53,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:53,726 INFO L225 Difference]: With dead ends: 119 [2021-08-27 07:31:53,726 INFO L226 Difference]: Without dead ends: 119 [2021-08-27 07:31:53,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 294.4ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-27 07:31:53,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-08-27 07:31:53,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 99. [2021-08-27 07:31:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 69 states have (on average 1.391304347826087) internal successors, (96), 82 states have internal predecessors, (96), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:53,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2021-08-27 07:31:53,731 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 44 [2021-08-27 07:31:53,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:53,732 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2021-08-27 07:31:53,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 10 states have internal predecessors, (33), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:53,732 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2021-08-27 07:31:53,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-27 07:31:53,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:53,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:53,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-27 07:31:53,734 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:53,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:53,734 INFO L82 PathProgramCache]: Analyzing trace with hash 1328594296, now seen corresponding path program 1 times [2021-08-27 07:31:53,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:53,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625190134] [2021-08-27 07:31:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:53,735 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:53,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:53,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:53,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:53,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:31:53,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:53,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625190134] [2021-08-27 07:31:53,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625190134] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:53,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:53,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:31:53,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608021039] [2021-08-27 07:31:53,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:31:53,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:53,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:31:53,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:31:53,872 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:54,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:54,285 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2021-08-27 07:31:54,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:31:54,285 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 47 [2021-08-27 07:31:54,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:54,286 INFO L225 Difference]: With dead ends: 118 [2021-08-27 07:31:54,286 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 07:31:54,286 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 264.7ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-08-27 07:31:54,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 07:31:54,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2021-08-27 07:31:54,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 75 states have (on average 1.3733333333333333) internal successors, (103), 88 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:54,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 123 transitions. [2021-08-27 07:31:54,289 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 123 transitions. Word has length 47 [2021-08-27 07:31:54,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:54,290 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 123 transitions. [2021-08-27 07:31:54,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 123 transitions. [2021-08-27 07:31:54,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 07:31:54,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:54,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:54,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:31:54,291 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1763249655, now seen corresponding path program 1 times [2021-08-27 07:31:54,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:54,291 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819326381] [2021-08-27 07:31:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:54,292 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:54,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:54,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:54,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:54,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:54,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:54,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:54,453 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:31:54,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:54,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819326381] [2021-08-27 07:31:54,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819326381] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:54,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:54,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:31:54,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305068603] [2021-08-27 07:31:54,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:31:54,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:54,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:31:54,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:31:54,456 INFO L87 Difference]: Start difference. First operand 105 states and 123 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:54,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:54,956 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-08-27 07:31:54,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-27 07:31:54,956 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-08-27 07:31:54,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:54,957 INFO L225 Difference]: With dead ends: 117 [2021-08-27 07:31:54,957 INFO L226 Difference]: Without dead ends: 117 [2021-08-27 07:31:54,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 289.5ms TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-08-27 07:31:54,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-08-27 07:31:54,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 107. [2021-08-27 07:31:54,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 77 states have (on average 1.3636363636363635) internal successors, (105), 90 states have internal predecessors, (105), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:54,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 125 transitions. [2021-08-27 07:31:54,960 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 125 transitions. Word has length 48 [2021-08-27 07:31:54,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:54,961 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 125 transitions. [2021-08-27 07:31:54,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:54,961 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 125 transitions. [2021-08-27 07:31:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 07:31:54,961 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:54,962 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:54,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 07:31:54,962 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1173835674, now seen corresponding path program 1 times [2021-08-27 07:31:54,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:54,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152109710] [2021-08-27 07:31:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:54,963 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:54,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:55,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:55,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:31:55,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:55,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152109710] [2021-08-27 07:31:55,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152109710] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:55,060 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:55,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 07:31:55,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024015804] [2021-08-27 07:31:55,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:31:55,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:55,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:31:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:31:55,062 INFO L87 Difference]: Start difference. First operand 107 states and 125 transitions. Second operand has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:31:55,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:55,252 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-08-27 07:31:55,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:31:55,253 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2021-08-27 07:31:55,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:55,253 INFO L225 Difference]: With dead ends: 106 [2021-08-27 07:31:55,254 INFO L226 Difference]: Without dead ends: 106 [2021-08-27 07:31:55,254 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:31:55,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-08-27 07:31:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-08-27 07:31:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 89 states have internal predecessors, (103), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 123 transitions. [2021-08-27 07:31:55,257 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 123 transitions. Word has length 49 [2021-08-27 07:31:55,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:55,258 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 123 transitions. [2021-08-27 07:31:55,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 1 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:31:55,258 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 123 transitions. [2021-08-27 07:31:55,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-27 07:31:55,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:55,258 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:55,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-27 07:31:55,259 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting sll_remove_firstErr9REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:55,259 INFO L82 PathProgramCache]: Analyzing trace with hash 2029167660, now seen corresponding path program 1 times [2021-08-27 07:31:55,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:55,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367696675] [2021-08-27 07:31:55,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:55,260 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:55,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:55,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:55,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:31:55,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:55,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367696675] [2021-08-27 07:31:55,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367696675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:55,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844828579] [2021-08-27 07:31:55,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:55,582 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:55,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:55,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:55,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-27 07:31:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:55,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-27 07:31:55,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:56,025 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:31:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 19 [2021-08-27 07:31:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:31:56,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844828579] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:56,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:31:56,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [21] total 27 [2021-08-27 07:31:56,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066386482] [2021-08-27 07:31:56,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:31:56,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:56,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:31:56,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-08-27 07:31:56,060 INFO L87 Difference]: Start difference. First operand 106 states and 123 transitions. Second operand has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:31:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:56,210 INFO L93 Difference]: Finished difference Result 105 states and 121 transitions. [2021-08-27 07:31:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:31:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 50 [2021-08-27 07:31:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:56,212 INFO L225 Difference]: With dead ends: 105 [2021-08-27 07:31:56,212 INFO L226 Difference]: Without dead ends: 105 [2021-08-27 07:31:56,214 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 357.1ms TimeCoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-08-27 07:31:56,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-27 07:31:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-08-27 07:31:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 77 states have (on average 1.3116883116883118) internal successors, (101), 88 states have internal predecessors, (101), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 121 transitions. [2021-08-27 07:31:56,222 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 121 transitions. Word has length 50 [2021-08-27 07:31:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:56,222 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 121 transitions. [2021-08-27 07:31:56,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:31:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 121 transitions. [2021-08-27 07:31:56,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 07:31:56,223 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:56,223 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:56,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-27 07:31:56,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 07:31:56,429 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:56,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:56,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2020712695, now seen corresponding path program 1 times [2021-08-27 07:31:56,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:56,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741006968] [2021-08-27 07:31:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:56,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:56,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:56,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:31:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,534 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:31:56,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:56,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741006968] [2021-08-27 07:31:56,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741006968] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:31:56,534 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:31:56,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:31:56,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718978927] [2021-08-27 07:31:56,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:31:56,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:56,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:31:56,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:31:56,536 INFO L87 Difference]: Start difference. First operand 105 states and 121 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:56,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:56,720 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-08-27 07:31:56,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:31:56,720 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 55 [2021-08-27 07:31:56,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:56,721 INFO L225 Difference]: With dead ends: 105 [2021-08-27 07:31:56,721 INFO L226 Difference]: Without dead ends: 105 [2021-08-27 07:31:56,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:31:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-27 07:31:56,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-08-27 07:31:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 77 states have (on average 1.2597402597402598) internal successors, (97), 87 states have internal predecessors, (97), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-08-27 07:31:56,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2021-08-27 07:31:56,724 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 55 [2021-08-27 07:31:56,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:56,724 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2021-08-27 07:31:56,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 5 states have internal predecessors, (33), 1 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:31:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2021-08-27 07:31:56,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-27 07:31:56,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:56,725 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:56,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 07:31:56,725 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting sll_remove_firstErr0REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1148883491, now seen corresponding path program 2 times [2021-08-27 07:31:56,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:56,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639033322] [2021-08-27 07:31:56,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:56,726 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-08-27 07:31:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 07:31:56,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:56,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639033322] [2021-08-27 07:31:56,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639033322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:56,837 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150527704] [2021-08-27 07:31:56,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:31:56,837 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:56,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:56,841 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:56,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-27 07:31:57,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:31:57,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:31:57,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 07:31:57,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 07:31:57,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150527704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:57,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:31:57,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-08-27 07:31:57,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671524382] [2021-08-27 07:31:57,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:31:57,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:31:57,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:31:57,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:31:57,257 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:31:57,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:31:57,446 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2021-08-27 07:31:57,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:31:57,447 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) Word has length 56 [2021-08-27 07:31:57,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:31:57,447 INFO L225 Difference]: With dead ends: 74 [2021-08-27 07:31:57,447 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 07:31:57,447 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:31:57,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 07:31:57,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-27 07:31:57,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 48 states have (on average 1.125) internal successors, (54), 53 states have internal predecessors, (54), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 07:31:57,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-08-27 07:31:57,450 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 56 [2021-08-27 07:31:57,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:31:57,450 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-08-27 07:31:57,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.555555555555555) internal successors, (41), 9 states have internal predecessors, (41), 8 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:31:57,450 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-08-27 07:31:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 07:31:57,451 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:31:57,451 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:31:57,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-27 07:31:57,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-27 07:31:57,661 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:31:57,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:31:57,661 INFO L82 PathProgramCache]: Analyzing trace with hash 793488505, now seen corresponding path program 1 times [2021-08-27 07:31:57,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:31:57,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108339324] [2021-08-27 07:31:57,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:57,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:31:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:57,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:31:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:57,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:31:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:57,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:31:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:57,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:31:57,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:58,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:31:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:58,482 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:31:58,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:31:58,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108339324] [2021-08-27 07:31:58,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108339324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:31:58,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158622524] [2021-08-27 07:31:58,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:31:58,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:31:58,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:31:58,484 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:31:58,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-27 07:31:58,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:31:58,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-27 07:31:58,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:31:58,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:31:59,006 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:31:59,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-08-27 07:31:59,104 INFO L388 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 21 treesize of output 17 [2021-08-27 07:31:59,652 INFO L388 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 25 treesize of output 17 [2021-08-27 07:31:59,889 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:31:59,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 38 [2021-08-27 07:31:59,899 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-08-27 07:31:59,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 40 [2021-08-27 07:32:00,153 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:00,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-08-27 07:32:00,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:32:00,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158622524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:00,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:00,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 52 [2021-08-27 07:32:00,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758507266] [2021-08-27 07:32:00,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-27 07:32:00,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:00,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-27 07:32:00,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2594, Unknown=0, NotChecked=0, Total=2756 [2021-08-27 07:32:00,208 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 07:32:02,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:02,342 INFO L93 Difference]: Finished difference Result 83 states and 87 transitions. [2021-08-27 07:32:02,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 07:32:02,342 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) Word has length 58 [2021-08-27 07:32:02,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:02,343 INFO L225 Difference]: With dead ends: 83 [2021-08-27 07:32:02,343 INFO L226 Difference]: Without dead ends: 83 [2021-08-27 07:32:02,345 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 2575.5ms TimeCoverageRelationStatistics Valid=514, Invalid=5186, Unknown=0, NotChecked=0, Total=5700 [2021-08-27 07:32:02,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-27 07:32:02,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 71. [2021-08-27 07:32:02,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.150943396226415) internal successors, (61), 57 states have internal predecessors, (61), 8 states have call successors, (8), 7 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:32:02,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 76 transitions. [2021-08-27 07:32:02,347 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 76 transitions. Word has length 58 [2021-08-27 07:32:02,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:02,347 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 76 transitions. [2021-08-27 07:32:02,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 51 states have (on average 1.588235294117647) internal successors, (81), 41 states have internal predecessors, (81), 7 states have call successors, (13), 8 states have call predecessors, (13), 8 states have return successors, (8), 8 states have call predecessors, (8), 5 states have call successors, (8) [2021-08-27 07:32:02,347 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 76 transitions. [2021-08-27 07:32:02,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-27 07:32:02,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:02,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:02,367 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-27 07:32:02,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-27 07:32:02,561 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting sll_remove_firstErr3REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:02,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:02,562 INFO L82 PathProgramCache]: Analyzing trace with hash 793488506, now seen corresponding path program 1 times [2021-08-27 07:32:02,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:02,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529425546] [2021-08-27 07:32:02,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:02,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:02,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:02,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:02,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:02,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:03,295 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:32:03,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529425546] [2021-08-27 07:32:03,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529425546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:03,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581878472] [2021-08-27 07:32:03,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:03,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:03,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:32:03,301 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:32:03,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-27 07:32:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:03,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 92 conjunts are in the unsatisfiable core [2021-08-27 07:32:03,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:32:03,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:32:04,099 INFO L354 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2021-08-27 07:32:04,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 14 [2021-08-27 07:32:04,208 INFO L388 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 20 treesize of output 16 [2021-08-27 07:32:04,214 INFO L388 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 17 treesize of output 13 [2021-08-27 07:32:04,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:04,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 30 [2021-08-27 07:32:04,554 INFO L388 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 27 treesize of output 19 [2021-08-27 07:32:05,325 INFO L354 Elim1Store]: treesize reduction 85, result has 3.4 percent of original size [2021-08-27 07:32:05,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 75 [2021-08-27 07:32:05,340 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-08-27 07:32:05,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 70 treesize of output 63 [2021-08-27 07:32:05,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:05,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 47 [2021-08-27 07:32:05,711 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:05,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 25 [2021-08-27 07:32:05,773 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:32:05,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581878472] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:05,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:05,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 31] total 58 [2021-08-27 07:32:05,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326245563] [2021-08-27 07:32:05,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-27 07:32:05,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:05,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-27 07:32:05,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3243, Unknown=0, NotChecked=0, Total=3422 [2021-08-27 07:32:05,776 INFO L87 Difference]: Start difference. First operand 71 states and 76 transitions. Second operand has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-08-27 07:32:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:09,105 INFO L93 Difference]: Finished difference Result 87 states and 90 transitions. [2021-08-27 07:32:09,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-27 07:32:09,106 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) Word has length 58 [2021-08-27 07:32:09,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:09,107 INFO L225 Difference]: With dead ends: 87 [2021-08-27 07:32:09,107 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 07:32:09,108 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 3852.4ms TimeCoverageRelationStatistics Valid=666, Invalid=8076, Unknown=0, NotChecked=0, Total=8742 [2021-08-27 07:32:09,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 07:32:09,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 79. [2021-08-27 07:32:09,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1333333333333333) internal successors, (68), 65 states have internal predecessors, (68), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:32:09,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2021-08-27 07:32:09,110 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 58 [2021-08-27 07:32:09,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:09,111 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2021-08-27 07:32:09,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 57 states have (on average 1.5263157894736843) internal successors, (87), 46 states have internal predecessors, (87), 8 states have call successors, (13), 8 states have call predecessors, (13), 9 states have return successors, (9), 9 states have call predecessors, (9), 6 states have call successors, (9) [2021-08-27 07:32:09,111 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2021-08-27 07:32:09,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-27 07:32:09,111 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:09,111 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:09,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-27 07:32:09,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:09,329 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:09,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:09,329 INFO L82 PathProgramCache]: Analyzing trace with hash 579683577, now seen corresponding path program 1 times [2021-08-27 07:32:09,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:09,329 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651570998] [2021-08-27 07:32:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:09,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:09,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:09,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:09,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:09,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:32:09,420 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:09,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651570998] [2021-08-27 07:32:09,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651570998] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:09,420 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907720428] [2021-08-27 07:32:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:09,421 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:09,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:32:09,422 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:32:09,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-27 07:32:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 07:32:09,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:32:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-08-27 07:32:09,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907720428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:09,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:09,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-08-27 07:32:09,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455276013] [2021-08-27 07:32:09,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:32:09,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:09,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:32:09,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:32:09,945 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:32:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:10,051 INFO L93 Difference]: Finished difference Result 79 states and 82 transitions. [2021-08-27 07:32:10,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:32:10,051 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-08-27 07:32:10,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:10,052 INFO L225 Difference]: With dead ends: 79 [2021-08-27 07:32:10,052 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 07:32:10,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:32:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 07:32:10,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-08-27 07:32:10,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 60 states have (on average 1.1166666666666667) internal successors, (67), 65 states have internal predecessors, (67), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:32:10,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2021-08-27 07:32:10,055 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 57 [2021-08-27 07:32:10,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:10,055 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2021-08-27 07:32:10,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 6 states have internal predecessors, (41), 4 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:32:10,056 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2021-08-27 07:32:10,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-08-27 07:32:10,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:10,056 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:10,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-27 07:32:10,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:10,266 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:10,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:10,266 INFO L82 PathProgramCache]: Analyzing trace with hash 274459610, now seen corresponding path program 1 times [2021-08-27 07:32:10,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:10,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993151635] [2021-08-27 07:32:10,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:10,267 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:10,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:10,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:10,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:10,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:10,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:10,823 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:32:10,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:10,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993151635] [2021-08-27 07:32:10,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993151635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:10,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266549790] [2021-08-27 07:32:10,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:10,824 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:10,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:32:10,837 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:32:10,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-27 07:32:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:11,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 61 conjunts are in the unsatisfiable core [2021-08-27 07:32:11,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:32:11,373 INFO L388 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 17 treesize of output 13 [2021-08-27 07:32:11,497 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:11,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 9 [2021-08-27 07:32:11,698 INFO L388 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 25 treesize of output 17 [2021-08-27 07:32:12,391 WARN L860 $PredicateComparison]: unable to prove that (exists ((sll_remove_first_~temp~1.base Int)) (let ((.cse0 (select |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base|))) (and (<= sll_remove_first_~temp~1.base (select (select |c_old(#memory_$Pointer$.base)| (select .cse0 |c_sll_remove_first_#in~head.offset|)) 4)) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_sll_remove_first_#in~head.base| (store .cse0 |c_sll_remove_first_#in~head.offset| sll_remove_first_~temp~1.base)))))) is different from true [2021-08-27 07:32:12,407 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:12,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 26 [2021-08-27 07:32:12,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-08-27 07:32:12,622 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:32:12,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266549790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:12,622 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:12,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 43 [2021-08-27 07:32:12,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352108288] [2021-08-27 07:32:12,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-27 07:32:12,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:12,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-27 07:32:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1693, Unknown=1, NotChecked=82, Total=1892 [2021-08-27 07:32:12,624 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 07:32:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:15,805 INFO L93 Difference]: Finished difference Result 81 states and 83 transitions. [2021-08-27 07:32:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 07:32:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2021-08-27 07:32:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:15,806 INFO L225 Difference]: With dead ends: 81 [2021-08-27 07:32:15,806 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 07:32:15,807 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3799.5ms TimeCoverageRelationStatistics Valid=449, Invalid=4523, Unknown=2, NotChecked=138, Total=5112 [2021-08-27 07:32:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 07:32:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-08-27 07:32:15,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 59 states have internal predecessors, (59), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:32:15,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2021-08-27 07:32:15,809 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 62 [2021-08-27 07:32:15,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:15,810 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2021-08-27 07:32:15,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 1.8095238095238095) internal successors, (76), 34 states have internal predecessors, (76), 7 states have call successors, (13), 7 states have call predecessors, (13), 6 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 07:32:15,810 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2021-08-27 07:32:15,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-08-27 07:32:15,810 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:15,810 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:15,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-08-27 07:32:16,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:16,018 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting sll_remove_firstErr2REQUIRES_VIOLATION === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:16,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:16,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1750291722, now seen corresponding path program 2 times [2021-08-27 07:32:16,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:16,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854676896] [2021-08-27 07:32:16,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:16,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:16,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:16,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:16,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-08-27 07:32:16,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-08-27 07:32:16,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:16,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854676896] [2021-08-27 07:32:16,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854676896] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:32:16,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:32:16,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 07:32:16,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035706192] [2021-08-27 07:32:16,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:32:16,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:16,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:32:16,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:32:16,113 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:32:16,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:16,229 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-08-27 07:32:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:32:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 72 [2021-08-27 07:32:16,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:16,232 INFO L225 Difference]: With dead ends: 56 [2021-08-27 07:32:16,232 INFO L226 Difference]: Without dead ends: 56 [2021-08-27 07:32:16,233 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:32:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-27 07:32:16,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-27 07:32:16,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 07:32:16,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-08-27 07:32:16,237 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 72 [2021-08-27 07:32:16,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:16,237 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-08-27 07:32:16,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 5 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:32:16,237 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-08-27 07:32:16,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 07:32:16,238 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:16,238 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:16,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-08-27 07:32:16,238 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:16,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:16,239 INFO L82 PathProgramCache]: Analyzing trace with hash -359283128, now seen corresponding path program 2 times [2021-08-27 07:32:16,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:16,239 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568185187] [2021-08-27 07:32:16,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:16,239 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:16,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:16,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:16,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:17,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:17,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:17,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:17,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:18,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-08-27 07:32:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:18,665 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:32:18,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:18,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568185187] [2021-08-27 07:32:18,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568185187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:18,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455098474] [2021-08-27 07:32:18,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:32:18,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:18,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:32:18,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:32:18,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-27 07:32:19,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:32:19,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:32:19,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 139 conjunts are in the unsatisfiable core [2021-08-27 07:32:19,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:32:19,142 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 07:32:19,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 24 [2021-08-27 07:32:19,253 INFO L354 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2021-08-27 07:32:19,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2021-08-27 07:32:19,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-27 07:32:19,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-27 07:32:19,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-27 07:32:19,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-08-27 07:32:19,970 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-27 07:32:19,970 INFO L388 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 1 case distinctions, treesize of input 41 treesize of output 40 [2021-08-27 07:32:19,980 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-08-27 07:32:19,980 INFO L388 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 1 case distinctions, treesize of input 37 treesize of output 36 [2021-08-27 07:32:20,685 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 07:32:20,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-08-27 07:32:20,701 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-08-27 07:32:20,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2021-08-27 07:32:20,915 INFO L354 Elim1Store]: treesize reduction 48, result has 32.4 percent of original size [2021-08-27 07:32:20,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 78 [2021-08-27 07:32:20,935 INFO L354 Elim1Store]: treesize reduction 66, result has 34.7 percent of original size [2021-08-27 07:32:20,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 109 [2021-08-27 07:32:22,211 INFO L354 Elim1Store]: treesize reduction 166, result has 14.0 percent of original size [2021-08-27 07:32:22,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 117 treesize of output 127 [2021-08-27 07:32:24,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:32:24,324 INFO L354 Elim1Store]: treesize reduction 170, result has 17.9 percent of original size [2021-08-27 07:32:24,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 214 treesize of output 156 [2021-08-27 07:32:24,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:32:24,333 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 07:32:24,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 143 [2021-08-27 07:32:24,363 INFO L354 Elim1Store]: treesize reduction 82, result has 22.6 percent of original size [2021-08-27 07:32:24,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 127 treesize of output 141 [2021-08-27 07:32:28,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:32:28,356 INFO L354 Elim1Store]: treesize reduction 198, result has 7.9 percent of original size [2021-08-27 07:32:28,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 206 treesize of output 166 [2021-08-27 07:32:28,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:32:28,382 INFO L354 Elim1Store]: treesize reduction 89, result has 11.0 percent of original size [2021-08-27 07:32:28,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 181 treesize of output 177 [2021-08-27 07:32:28,405 INFO L354 Elim1Store]: treesize reduction 40, result has 34.4 percent of original size [2021-08-27 07:32:28,405 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 159 [2021-08-27 07:32:28,641 INFO L354 Elim1Store]: treesize reduction 29, result has 12.1 percent of original size [2021-08-27 07:32:28,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 64 [2021-08-27 07:32:28,655 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-08-27 07:32:28,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 27 [2021-08-27 07:32:28,662 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:32:28,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455098474] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:28,662 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:28,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 43] total 80 [2021-08-27 07:32:28,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724931707] [2021-08-27 07:32:28,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-27 07:32:28,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:28,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-27 07:32:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=6046, Unknown=0, NotChecked=0, Total=6320 [2021-08-27 07:32:28,665 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-27 07:32:33,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:33,423 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2021-08-27 07:32:33,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-27 07:32:33,424 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) Word has length 71 [2021-08-27 07:32:33,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:33,424 INFO L225 Difference]: With dead ends: 54 [2021-08-27 07:32:33,424 INFO L226 Difference]: Without dead ends: 54 [2021-08-27 07:32:33,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1693 ImplicationChecksByTransitivity, 8288.6ms TimeCoverageRelationStatistics Valid=559, Invalid=10783, Unknown=0, NotChecked=0, Total=11342 [2021-08-27 07:32:33,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-27 07:32:33,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-27 07:32:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 42 states have (on average 1.0) internal successors, (42), 42 states have internal predecessors, (42), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-08-27 07:32:33,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-27 07:32:33,428 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 71 [2021-08-27 07:32:33,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:33,428 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-27 07:32:33,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 1.4230769230769231) internal successors, (111), 69 states have internal predecessors, (111), 12 states have call successors, (14), 7 states have call predecessors, (14), 12 states have return successors, (12), 12 states have call predecessors, (12), 11 states have call successors, (12) [2021-08-27 07:32:33,429 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-27 07:32:33,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-08-27 07:32:33,429 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:32:33,429 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:32:33,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-27 07:32:33,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 07:32:33,630 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [sll_createErr0REQUIRES_VIOLATION, sll_createErr1REQUIRES_VIOLATION, node_createErr0REQUIRES_VIOLATION, node_createErr1REQUIRES_VIOLATION (and 17 more)] === [2021-08-27 07:32:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:32:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash -359283063, now seen corresponding path program 1 times [2021-08-27 07:32:33,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:32:33,630 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995549870] [2021-08-27 07:32:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:33,631 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:32:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:33,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:32:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:33,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:32:33,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:34,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-08-27 07:32:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:34,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-08-27 07:32:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:34,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-08-27 07:32:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:34,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-08-27 07:32:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:34,936 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:32:34,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:32:34,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995549870] [2021-08-27 07:32:34,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995549870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:34,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506176999] [2021-08-27 07:32:34,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:32:34,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:32:34,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:32:34,941 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:32:34,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-27 07:32:35,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:32:35,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-27 07:32:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:32:36,077 INFO L388 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 34 treesize of output 30 [2021-08-27 07:32:36,683 INFO L388 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 25 treesize of output 17 [2021-08-27 07:32:36,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:36,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 56 [2021-08-27 07:32:37,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-27 07:32:37,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 53 [2021-08-27 07:32:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:32:37,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506176999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:32:37,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:32:37,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 61 [2021-08-27 07:32:37,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397393213] [2021-08-27 07:32:37,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-27 07:32:37,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:32:37,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-27 07:32:37,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3593, Unknown=0, NotChecked=0, Total=3782 [2021-08-27 07:32:37,642 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-08-27 07:32:39,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:32:39,565 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-08-27 07:32:39,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 07:32:39,565 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 71 [2021-08-27 07:32:39,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:32:39,565 INFO L225 Difference]: With dead ends: 53 [2021-08-27 07:32:39,566 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:32:39,567 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 3067.8ms TimeCoverageRelationStatistics Valid=354, Invalid=5966, Unknown=0, NotChecked=0, Total=6320 [2021-08-27 07:32:39,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:32:39,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:32:39,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-27 07:32:39,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:32:39,567 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 71 [2021-08-27 07:32:39,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:32:39,568 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:32:39,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 1.8983050847457628) internal successors, (112), 52 states have internal predecessors, (112), 10 states have call successors, (13), 6 states have call predecessors, (13), 11 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2021-08-27 07:32:39,568 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:32:39,568 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr0REQUIRES_VIOLATION [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_createErr1REQUIRES_VIOLATION [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-08-27 07:32:39,570 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr0REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr1REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr2REQUIRES_VIOLATION [2021-08-27 07:32:39,571 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr3REQUIRES_VIOLATION [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr4REQUIRES_VIOLATION [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr5REQUIRES_VIOLATION [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr6ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr7ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr9REQUIRES_VIOLATION [2021-08-27 07:32:39,572 INFO L764 garLoopResultBuilder]: Registering result SAFE for location sll_remove_firstErr10REQUIRES_VIOLATION [2021-08-27 07:32:39,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-27 07:32:39,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 07:32:39,784 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:32:39,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:32:39 BoogieIcfgContainer [2021-08-27 07:32:39,785 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:32:39,786 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:32:39,786 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:32:39,786 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:32:39,786 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:31:45" (3/4) ... [2021-08-27 07:32:39,788 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_create [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:32:39,792 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure sll_remove_first [2021-08-27 07:32:39,793 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-08-27 07:32:39,795 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2021-08-27 07:32:39,795 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-27 07:32:39,796 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 07:32:39,796 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:32:39,827 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:32:39,827 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:32:39,827 INFO L168 Benchmark]: Toolchain (without parser) took 54923.22 ms. Allocated memory was 58.7 MB in the beginning and 413.1 MB in the end (delta: 354.4 MB). Free memory was 36.5 MB in the beginning and 261.0 MB in the end (delta: -224.5 MB). Peak memory consumption was 129.5 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,828 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:32:39,828 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.97 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 36.3 MB in the beginning and 55.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,829 INFO L168 Benchmark]: Boogie Preprocessor took 35.10 ms. Allocated memory is still 77.6 MB. Free memory was 55.2 MB in the beginning and 52.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,829 INFO L168 Benchmark]: RCFGBuilder took 716.33 ms. Allocated memory is still 77.6 MB. Free memory was 52.6 MB in the beginning and 49.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,830 INFO L168 Benchmark]: TraceAbstraction took 53822.54 ms. Allocated memory was 77.6 MB in the beginning and 413.1 MB in the end (delta: 335.5 MB). Free memory was 49.0 MB in the beginning and 265.2 MB in the end (delta: -216.2 MB). Peak memory consumption was 118.9 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,830 INFO L168 Benchmark]: Witness Printer took 41.02 ms. Allocated memory is still 413.1 MB. Free memory was 265.2 MB in the beginning and 261.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:32:39,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 58.7 MB. Free memory was 40.7 MB in the beginning and 40.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 303.97 ms. Allocated memory was 58.7 MB in the beginning and 77.6 MB in the end (delta: 18.9 MB). Free memory was 36.3 MB in the beginning and 55.2 MB in the end (delta: -19.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.10 ms. Allocated memory is still 77.6 MB. Free memory was 55.2 MB in the beginning and 52.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 716.33 ms. Allocated memory is still 77.6 MB. Free memory was 52.6 MB in the beginning and 49.4 MB in the end (delta: 3.2 MB). Peak memory consumption was 21.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 53822.54 ms. Allocated memory was 77.6 MB in the beginning and 413.1 MB in the end (delta: 335.5 MB). Free memory was 49.0 MB in the beginning and 265.2 MB in the end (delta: -216.2 MB). Peak memory consumption was 118.9 MB. Max. memory is 16.1 GB. * Witness Printer took 41.02 ms. Allocated memory is still 413.1 MB. Free memory was 265.2 MB in the beginning and 261.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 587]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 579]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 580]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 605]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 597]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 593]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 594]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 595]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 80 locations, 21 error locations. Started 1 CEGAR loops. OverallTime: 53778.6ms, OverallIterations: 24, TraceHistogramMax: 3, EmptinessCheckTime: 24.7ms, AutomataDifference: 20494.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 904 SDtfs, 1887 SDslu, 5631 SDs, 0 SdLazy, 14037 SolverSat, 523 SolverUnsat, 13 SolverUnknown, 0 SolverNotchecked, 7079.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1300 GetRequests, 600 SyntacticMatches, 13 SemanticMatches, 687 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 6963 ImplicationChecksByTransitivity, 24756.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=107occurred in iteration=13, InterpolantAutomatonStates: 354, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 121.3ms AutomataMinimizationTime, 24 MinimizatonAttempts, 144 StatesRemovedByMinimization, 17 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 218.3ms SsaConstructionTime, 612.3ms SatisfiabilityAnalysisTime, 26881.5ms InterpolantComputationTime, 1673 NumberOfCodeBlocks, 1673 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 1638 ConstructedInterpolants, 114 QuantifiedInterpolants, 21724 SizeOfPredicates, 138 NumberOfNonLiveVariables, 3429 ConjunctsInSsa, 542 ConjunctsInUnsatCore, 35 InterpolantComputations, 14 PerfectInterpolantSequences, 358/605 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 - AllSpecificationsHoldResult: All specifications hold 21 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 07:32:39,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...