./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/dll2n_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/dll2n_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 429d2952e247c8d1d32d3027545d64f06bfba6cc .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:16:20,989 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 07:16:20,990 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 07:16:21,007 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 07:16:21,008 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 07:16:21,008 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 07:16:21,009 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 07:16:21,014 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 07:16:21,018 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 07:16:21,022 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 07:16:21,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 07:16:21,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 07:16:21,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 07:16:21,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 07:16:21,031 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 07:16:21,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 07:16:21,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 07:16:21,033 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 07:16:21,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 07:16:21,041 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 07:16:21,042 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 07:16:21,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 07:16:21,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 07:16:21,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 07:16:21,079 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 07:16:21,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 07:16:21,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 07:16:21,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 07:16:21,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 07:16:21,084 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 07:16:21,085 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 07:16:21,085 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 07:16:21,086 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 07:16:21,087 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 07:16:21,092 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 07:16:21,092 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 07:16:21,093 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 07:16:21,093 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 07:16:21,093 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 07:16:21,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 07:16:21,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 07:16:21,094 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 07:16:21,139 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 07:16:21,139 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 07:16:21,140 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 07:16:21,140 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 07:16:21,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 07:16:21,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 07:16:21,142 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 07:16:21,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 07:16:21,142 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 07:16:21,142 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 07:16:21,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 07:16:21,143 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 07:16:21,143 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:16:21,144 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 07:16:21,144 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 07:16:21,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 429d2952e247c8d1d32d3027545d64f06bfba6cc [2021-08-27 07:16:21,400 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 07:16:21,418 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 07:16:21,420 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 07:16:21,420 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 07:16:21,421 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 07:16:21,422 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-08-27 07:16:21,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ee1cb0d/1496a773ba3e4984aa6c0cd0d15325c7/FLAGcf5ebac62 [2021-08-27 07:16:21,884 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 07:16:21,884 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2021-08-27 07:16:21,893 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ee1cb0d/1496a773ba3e4984aa6c0cd0d15325c7/FLAGcf5ebac62 [2021-08-27 07:16:21,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8ee1cb0d/1496a773ba3e4984aa6c0cd0d15325c7 [2021-08-27 07:16:21,905 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 07:16:21,906 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 07:16:21,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 07:16:21,908 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 07:16:21,910 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 07:16:21,910 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:16:21" (1/1) ... [2021-08-27 07:16:21,911 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ed0884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:21, skipping insertion in model container [2021-08-27 07:16:21,911 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 07:16:21" (1/1) ... [2021-08-27 07:16:21,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 07:16:21,949 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 07:16:22,143 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/dll2n_remove_all.i[24090,24103] [2021-08-27 07:16:22,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:16:22,150 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 07:16:22,175 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/dll2n_remove_all.i[24090,24103] [2021-08-27 07:16:22,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 07:16:22,194 INFO L208 MainTranslator]: Completed translation [2021-08-27 07:16:22,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22 WrapperNode [2021-08-27 07:16:22,194 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 07:16:22,195 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 07:16:22,195 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 07:16:22,195 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 07:16:22,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,211 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,211 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,220 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,224 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,226 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,237 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 07:16:22,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 07:16:22,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 07:16:22,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 07:16:22,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (1/1) ... [2021-08-27 07:16:22,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 07:16:22,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:22,262 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 07:16:22,288 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 07:16:22,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 07:16:22,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 07:16:22,303 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2021-08-27 07:16:22,304 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2021-08-27 07:16:22,305 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 07:16:22,305 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 07:16:22,306 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 07:16:22,307 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 07:16:22,308 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 07:16:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 07:16:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 07:16:22,311 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 07:16:22,312 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 07:16:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 07:16:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 07:16:22,317 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 07:16:22,318 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 07:16:22,319 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 07:16:22,320 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 07:16:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2021-08-27 07:16:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2021-08-27 07:16:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 07:16:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 07:16:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 07:16:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-08-27 07:16:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 07:16:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 07:16:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 07:16:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 07:16:22,577 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 07:16:22,781 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 07:16:22,781 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-27 07:16:22,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:16:22 BoogieIcfgContainer [2021-08-27 07:16:22,782 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 07:16:22,783 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 07:16:22,783 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 07:16:22,785 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 07:16:22,785 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 07:16:21" (1/3) ... [2021-08-27 07:16:22,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e97723c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:16:22, skipping insertion in model container [2021-08-27 07:16:22,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 07:16:22" (2/3) ... [2021-08-27 07:16:22,786 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e97723c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 07:16:22, skipping insertion in model container [2021-08-27 07:16:22,786 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:16:22" (3/3) ... [2021-08-27 07:16:22,787 INFO L111 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2021-08-27 07:16:22,791 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 07:16:22,791 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-08-27 07:16:22,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 07:16:22,831 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 07:16:22,831 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-08-27 07:16:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 61 states have internal predecessors, (69), 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 07:16:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 07:16:22,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:22,849 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:22,850 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting dll_createErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:22,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:22,854 INFO L82 PathProgramCache]: Analyzing trace with hash 922136398, now seen corresponding path program 1 times [2021-08-27 07:16:22,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:22,866 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953517172] [2021-08-27 07:16:22,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:22,866 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,069 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 07:16:23,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:23,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953517172] [2021-08-27 07:16:23,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953517172] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:23,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:23,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:16:23,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706715210] [2021-08-27 07:16:23,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:16:23,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:23,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:16:23,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:16:23,086 INFO L87 Difference]: Start difference. First operand has 71 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 61 states have internal predecessors, (69), 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) Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:23,240 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2021-08-27 07:16:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:16:23,241 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 07:16:23,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:23,248 INFO L225 Difference]: With dead ends: 72 [2021-08-27 07:16:23,248 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 07:16:23,249 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:16:23,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 07:16:23,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2021-08-27 07:16:23,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 54 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2021-08-27 07:16:23,278 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 11 [2021-08-27 07:16:23,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:23,279 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2021-08-27 07:16:23,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,279 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2021-08-27 07:16:23,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 07:16:23,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:23,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:23,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 07:16:23,280 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting dll_createErr1REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 922136399, now seen corresponding path program 1 times [2021-08-27 07:16:23,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:23,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758861898] [2021-08-27 07:16:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:23,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:23,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,397 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 07:16:23,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:23,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758861898] [2021-08-27 07:16:23,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758861898] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:23,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:23,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 07:16:23,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623026699] [2021-08-27 07:16:23,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:16:23,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:23,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:16:23,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:16:23,399 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:23,495 INFO L93 Difference]: Finished difference Result 63 states and 67 transitions. [2021-08-27 07:16:23,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:16:23,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 07:16:23,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:23,496 INFO L225 Difference]: With dead ends: 63 [2021-08-27 07:16:23,496 INFO L226 Difference]: Without dead ends: 63 [2021-08-27 07:16:23,497 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.1ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:16:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-08-27 07:16:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2021-08-27 07:16:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2021-08-27 07:16:23,507 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 11 [2021-08-27 07:16:23,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:23,507 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2021-08-27 07:16:23,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,508 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2021-08-27 07:16:23,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:16:23,508 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:23,509 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:23,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 07:16:23,509 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:23,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:23,510 INFO L82 PathProgramCache]: Analyzing trace with hash 854735752, now seen corresponding path program 1 times [2021-08-27 07:16:23,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:23,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84373042] [2021-08-27 07:16:23,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:23,511 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:23,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,607 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 07:16:23,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:23,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84373042] [2021-08-27 07:16:23,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84373042] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:23,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:23,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:16:23,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818619052] [2021-08-27 07:16:23,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:16:23,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:23,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:16:23,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:16:23,609 INFO L87 Difference]: Start difference. First operand 59 states and 62 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 07:16:23,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:23,795 INFO L93 Difference]: Finished difference Result 81 states and 85 transitions. [2021-08-27 07:16:23,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:16:23,795 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 07:16:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:23,796 INFO L225 Difference]: With dead ends: 81 [2021-08-27 07:16:23,796 INFO L226 Difference]: Without dead ends: 78 [2021-08-27 07:16:23,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 89.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:16:23,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-27 07:16:23,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 60. [2021-08-27 07:16:23,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.6470588235294117) internal successors, (56), 52 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2021-08-27 07:16:23,800 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 15 [2021-08-27 07:16:23,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:23,800 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2021-08-27 07:16:23,804 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 07:16:23,804 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2021-08-27 07:16:23,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 07:16:23,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:23,805 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:23,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 07:16:23,805 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:23,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:23,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1920649746, now seen corresponding path program 1 times [2021-08-27 07:16:23,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:23,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863016412] [2021-08-27 07:16:23,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:23,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:23,860 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 07:16:23,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:23,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863016412] [2021-08-27 07:16:23,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863016412] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:23,861 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:23,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 07:16:23,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001653639] [2021-08-27 07:16:23,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:16:23,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:23,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:16:23,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 07:16:23,862 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:23,954 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-08-27 07:16:23,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 07:16:23,954 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-27 07:16:23,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:23,955 INFO L225 Difference]: With dead ends: 66 [2021-08-27 07:16:23,955 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 07:16:23,955 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 07:16:23,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 07:16:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-08-27 07:16:23,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.564102564102564) internal successors, (61), 57 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-08-27 07:16:23,958 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 15 [2021-08-27 07:16:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:23,958 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-08-27 07:16:23,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 07:16:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-08-27 07:16:23,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:16:23,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:23,959 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] [2021-08-27 07:16:23,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 07:16:23,959 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:23,960 INFO L82 PathProgramCache]: Analyzing trace with hash -822231468, now seen corresponding path program 1 times [2021-08-27 07:16:23,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:23,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490563365] [2021-08-27 07:16:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:23,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:23,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,064 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 07:16:24,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:24,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490563365] [2021-08-27 07:16:24,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490563365] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:24,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643033202] [2021-08-27 07:16:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:24,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:24,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:24,069 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 07:16:24,089 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 07:16:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:16:24,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:24,338 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 07:16:24,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643033202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:24,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:24,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-08-27 07:16:24,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144178480] [2021-08-27 07:16:24,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 07:16:24,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 07:16:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:16:24,340 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:24,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:24,531 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2021-08-27 07:16:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 07:16:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 22 [2021-08-27 07:16:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:24,532 INFO L225 Difference]: With dead ends: 88 [2021-08-27 07:16:24,532 INFO L226 Difference]: Without dead ends: 85 [2021-08-27 07:16:24,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:16:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-27 07:16:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2021-08-27 07:16:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 41 states have (on average 1.5365853658536586) internal successors, (63), 59 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2021-08-27 07:16:24,535 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 22 [2021-08-27 07:16:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:24,535 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2021-08-27 07:16:24,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2021-08-27 07:16:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:16:24,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:24,536 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:24,556 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 07:16:24,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:24,743 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting dll_createErr6REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:24,743 INFO L82 PathProgramCache]: Analyzing trace with hash 243682526, now seen corresponding path program 1 times [2021-08-27 07:16:24,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:24,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534409953] [2021-08-27 07:16:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:24,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:24,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,823 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:24,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:24,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534409953] [2021-08-27 07:16:24,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534409953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:24,823 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408135500] [2021-08-27 07:16:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:24,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:24,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:24,833 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 07:16:24,834 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 07:16:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:24,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 07:16:24,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:25,011 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 07:16:25,069 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-08-27 07:16:25,069 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 07:16:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:25,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408135500] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:25,181 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:25,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-08-27 07:16:25,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175799306] [2021-08-27 07:16:25,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 07:16:25,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:25,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 07:16:25,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-27 07:16:25,182 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 07:16:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:25,302 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2021-08-27 07:16:25,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:16:25,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 22 [2021-08-27 07:16:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:25,303 INFO L225 Difference]: With dead ends: 66 [2021-08-27 07:16:25,303 INFO L226 Difference]: Without dead ends: 66 [2021-08-27 07:16:25,304 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 50.8ms TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:16:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-27 07:16:25,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-08-27 07:16:25,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.5121951219512195) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:25,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-08-27 07:16:25,306 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 22 [2021-08-27 07:16:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:25,307 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-08-27 07:16:25,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 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 07:16:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-08-27 07:16:25,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 07:16:25,307 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:25,308 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:25,326 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 07:16:25,512 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,SelfDestructingSolverStorable5 [2021-08-27 07:16:25,513 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting dll_createErr7REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:25,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:25,513 INFO L82 PathProgramCache]: Analyzing trace with hash 243682527, now seen corresponding path program 1 times [2021-08-27 07:16:25,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:25,513 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932665739] [2021-08-27 07:16:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:25,514 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:25,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:25,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:25,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:25,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932665739] [2021-08-27 07:16:25,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932665739] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:25,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466480303] [2021-08-27 07:16:25,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:25,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:25,595 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 07:16:25,627 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 07:16:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:25,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-27 07:16:25,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:25,747 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 07:16:25,752 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 07:16:25,844 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-08-27 07:16:25,845 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 22 treesize of output 24 [2021-08-27 07:16:25,859 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:16:25,859 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 21 treesize of output 21 [2021-08-27 07:16:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:25,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466480303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:25,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:25,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-08-27 07:16:25,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146667904] [2021-08-27 07:16:25,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:16:25,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:25,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:16:25,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:16:25,969 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 07:16:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:26,117 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2021-08-27 07:16:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:16:26,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 22 [2021-08-27 07:16:26,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:26,118 INFO L225 Difference]: With dead ends: 65 [2021-08-27 07:16:26,118 INFO L226 Difference]: Without dead ends: 65 [2021-08-27 07:16:26,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 56.1ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:16:26,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-27 07:16:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-08-27 07:16:26,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 57 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:26,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2021-08-27 07:16:26,121 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 22 [2021-08-27 07:16:26,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:26,121 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2021-08-27 07:16:26,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 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 07:16:26,121 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2021-08-27 07:16:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-27 07:16:26,121 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:26,121 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:26,140 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 07:16:26,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:26,337 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:26,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:26,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1060389368, now seen corresponding path program 2 times [2021-08-27 07:16:26,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:26,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119681699] [2021-08-27 07:16:26,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:26,338 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:26,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:26,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119681699] [2021-08-27 07:16:26,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119681699] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:26,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057115053] [2021-08-27 07:16:26,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:16:26,418 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:26,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:26,429 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 07:16:26,449 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 07:16:26,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-27 07:16:26,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:16:26,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 07:16:26,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:16:26,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057115053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:26,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:16:26,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-08-27 07:16:26,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363466899] [2021-08-27 07:16:26,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 07:16:26,629 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:26,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 07:16:26,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:16:26,630 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:26,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:26,641 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-08-27 07:16:26,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 07:16:26,642 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-08-27 07:16:26,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:26,643 INFO L225 Difference]: With dead ends: 68 [2021-08-27 07:16:26,643 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 07:16:26,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.6ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:16:26,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 07:16:26,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2021-08-27 07:16:26,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 58 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:26,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2021-08-27 07:16:26,647 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 29 [2021-08-27 07:16:26,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:26,647 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2021-08-27 07:16:26,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:26,647 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2021-08-27 07:16:26,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-27 07:16:26,647 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:26,647 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:26,674 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 07:16:26,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:26,872 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:26,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:26,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1126814843, now seen corresponding path program 1 times [2021-08-27 07:16:26,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:26,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011694692] [2021-08-27 07:16:26,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:26,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:26,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:26,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:26,950 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:26,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:26,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011694692] [2021-08-27 07:16:26,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011694692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:26,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917085377] [2021-08-27 07:16:26,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:26,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:26,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:26,952 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 07:16:27,004 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 07:16:27,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:27,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 07:16:27,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:27,230 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:27,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917085377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:27,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:27,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 6 [2021-08-27 07:16:27,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475390708] [2021-08-27 07:16:27,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 07:16:27,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:27,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 07:16:27,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 07:16:27,231 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:16:27,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:27,357 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2021-08-27 07:16:27,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:16:27,357 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2021-08-27 07:16:27,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:27,358 INFO L225 Difference]: With dead ends: 75 [2021-08-27 07:16:27,358 INFO L226 Difference]: Without dead ends: 75 [2021-08-27 07:16:27,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:16:27,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-27 07:16:27,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-08-27 07:16:27,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 58 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:27,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2021-08-27 07:16:27,370 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 31 [2021-08-27 07:16:27,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:27,370 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2021-08-27 07:16:27,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-08-27 07:16:27,371 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2021-08-27 07:16:27,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:16:27,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:27,373 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:27,392 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 07:16:27,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:27,586 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:27,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:27,586 INFO L82 PathProgramCache]: Analyzing trace with hash 277523133, now seen corresponding path program 1 times [2021-08-27 07:16:27,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:27,586 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166569177] [2021-08-27 07:16:27,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:27,587 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:27,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:27,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:27,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:27,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:27,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166569177] [2021-08-27 07:16:27,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166569177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:27,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247200485] [2021-08-27 07:16:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:27,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:27,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:27,825 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 07:16:27,828 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 07:16:27,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-27 07:16:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:27,985 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 07:16:28,006 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 07:16:28,306 INFO L354 Elim1Store]: treesize reduction 50, result has 9.1 percent of original size [2021-08-27 07:16:28,306 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 24 [2021-08-27 07:16:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:28,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247200485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:28,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:28,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2021-08-27 07:16:28,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514133388] [2021-08-27 07:16:28,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-27 07:16:28,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:28,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-27 07:16:28,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-08-27 07:16:28,453 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:29,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:29,352 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2021-08-27 07:16:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:16:29,353 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2021-08-27 07:16:29,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:29,354 INFO L225 Difference]: With dead ends: 114 [2021-08-27 07:16:29,354 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 07:16:29,354 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 588.3ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-08-27 07:16:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 07:16:29,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 81. [2021-08-27 07:16:29,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 56 states have (on average 1.3571428571428572) internal successors, (76), 71 states have internal predecessors, (76), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:16:29,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-08-27 07:16:29,357 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 32 [2021-08-27 07:16:29,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:29,357 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-08-27 07:16:29,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.6842105263157894) internal successors, (51), 17 states have internal predecessors, (51), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:29,357 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-08-27 07:16:29,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-27 07:16:29,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:29,358 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:29,377 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 07:16:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:29,573 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting dll_remove_firstErr1REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:29,573 INFO L82 PathProgramCache]: Analyzing trace with hash 277523134, now seen corresponding path program 1 times [2021-08-27 07:16:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:29,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466764270] [2021-08-27 07:16:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:29,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:29,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:29,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:29,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:29,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:29,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466764270] [2021-08-27 07:16:29,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466764270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:29,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170353395] [2021-08-27 07:16:29,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:29,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:29,827 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 07:16:29,843 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 07:16:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:30,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-27 07:16:30,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:30,038 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 07:16:30,051 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 11 treesize of output 9 [2021-08-27 07:16:30,360 INFO L354 Elim1Store]: treesize reduction 44, result has 20.0 percent of original size [2021-08-27 07:16:30,361 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 07:16:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:30,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170353395] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:30,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:30,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 17 [2021-08-27 07:16:30,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208120240] [2021-08-27 07:16:30,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-27 07:16:30,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:30,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-27 07:16:30,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-08-27 07:16:30,499 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:31,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:31,187 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2021-08-27 07:16:31,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 07:16:31,189 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2021-08-27 07:16:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:31,189 INFO L225 Difference]: With dead ends: 126 [2021-08-27 07:16:31,190 INFO L226 Difference]: Without dead ends: 126 [2021-08-27 07:16:31,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 421.7ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-08-27 07:16:31,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-08-27 07:16:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 98. [2021-08-27 07:16:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 71 states have (on average 1.4366197183098592) internal successors, (102), 86 states have internal predecessors, (102), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-08-27 07:16:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 114 transitions. [2021-08-27 07:16:31,194 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 114 transitions. Word has length 32 [2021-08-27 07:16:31,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:31,194 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 114 transitions. [2021-08-27 07:16:31,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.125) internal successors, (50), 14 states have internal predecessors, (50), 4 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:31,194 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 114 transitions. [2021-08-27 07:16:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 07:16:31,196 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:31,196 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:31,215 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 07:16:31,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:31,401 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 13282519, now seen corresponding path program 1 times [2021-08-27 07:16:31,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:31,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587684808] [2021-08-27 07:16:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:31,401 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:31,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:31,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:31,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:16:31,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:31,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587684808] [2021-08-27 07:16:31,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587684808] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:31,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:31,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 07:16:31,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042538702] [2021-08-27 07:16:31,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 07:16:31,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 07:16:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:16:31,516 INFO L87 Difference]: Start difference. First operand 98 states and 114 transitions. Second operand has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 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 07:16:31,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:31,871 INFO L93 Difference]: Finished difference Result 138 states and 166 transitions. [2021-08-27 07:16:31,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 07:16:31,872 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 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 33 [2021-08-27 07:16:31,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:31,873 INFO L225 Difference]: With dead ends: 138 [2021-08-27 07:16:31,873 INFO L226 Difference]: Without dead ends: 138 [2021-08-27 07:16:31,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 161.3ms TimeCoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:16:31,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-27 07:16:31,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 103. [2021-08-27 07:16:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.4666666666666666) internal successors, (110), 90 states have internal predecessors, (110), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:31,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 124 transitions. [2021-08-27 07:16:31,876 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 124 transitions. Word has length 33 [2021-08-27 07:16:31,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:31,876 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 124 transitions. [2021-08-27 07:16:31,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.272727272727273) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (4), 4 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 07:16:31,880 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 124 transitions. [2021-08-27 07:16:31,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-27 07:16:31,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:31,882 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:31,882 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-27 07:16:31,882 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting dll_remove_firstErr3REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:31,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:31,882 INFO L82 PathProgramCache]: Analyzing trace with hash 13282520, now seen corresponding path program 1 times [2021-08-27 07:16:31,882 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:31,882 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883617223] [2021-08-27 07:16:31,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:31,882 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:31,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:31,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:32,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:16:32,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:32,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883617223] [2021-08-27 07:16:32,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883617223] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:32,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:32,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 07:16:32,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087638297] [2021-08-27 07:16:32,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 07:16:32,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:32,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 07:16:32,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:16:32,029 INFO L87 Difference]: Start difference. First operand 103 states and 124 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 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 07:16:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:32,398 INFO L93 Difference]: Finished difference Result 141 states and 169 transitions. [2021-08-27 07:16:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 07:16:32,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 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 33 [2021-08-27 07:16:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:32,399 INFO L225 Difference]: With dead ends: 141 [2021-08-27 07:16:32,399 INFO L226 Difference]: Without dead ends: 141 [2021-08-27 07:16:32,400 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:16:32,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-27 07:16:32,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-08-27 07:16:32,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 75 states have (on average 1.44) internal successors, (108), 90 states have internal predecessors, (108), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:32,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 122 transitions. [2021-08-27 07:16:32,402 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 122 transitions. Word has length 33 [2021-08-27 07:16:32,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:32,403 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 122 transitions. [2021-08-27 07:16:32,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 8 states have internal predecessors, (27), 2 states have call successors, (4), 4 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 07:16:32,403 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 122 transitions. [2021-08-27 07:16:32,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 07:16:32,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:32,403 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:32,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-27 07:16:32,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting dll_remove_firstErr4REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:32,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:32,404 INFO L82 PathProgramCache]: Analyzing trace with hash 562523457, now seen corresponding path program 1 times [2021-08-27 07:16:32,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:32,404 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344348237] [2021-08-27 07:16:32,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:32,404 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:32,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:32,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:32,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:32,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:32,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344348237] [2021-08-27 07:16:32,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344348237] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:32,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840909668] [2021-08-27 07:16:32,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:32,666 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:32,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:32,671 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 07:16:32,673 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 07:16:32,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:32,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 60 conjunts are in the unsatisfiable core [2021-08-27 07:16:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:32,903 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 07:16:32,935 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:16:32,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-08-27 07:16:32,955 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 07:16:32,980 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 0 case distinctions, treesize of input 28 treesize of output 23 [2021-08-27 07:16:33,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:33,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:33,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 22 [2021-08-27 07:16:33,009 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 07:16:33,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:33,075 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-08-27 07:16:33,076 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 3 case distinctions, treesize of input 90 treesize of output 65 [2021-08-27 07:16:33,087 INFO L354 Elim1Store]: treesize reduction 47, result has 16.1 percent of original size [2021-08-27 07:16:33,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 73 [2021-08-27 07:16:33,699 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-08-27 07:16:33,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 131 treesize of output 64 [2021-08-27 07:16:33,715 INFO L354 Elim1Store]: treesize reduction 62, result has 1.6 percent of original size [2021-08-27 07:16:33,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 27 [2021-08-27 07:16:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:33,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840909668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:33,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:33,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 27 [2021-08-27 07:16:33,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721771642] [2021-08-27 07:16:33,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-27 07:16:33,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-27 07:16:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=690, Unknown=0, NotChecked=0, Total=756 [2021-08-27 07:16:33,725 INFO L87 Difference]: Start difference. First operand 103 states and 122 transitions. Second operand has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:35,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:35,089 INFO L93 Difference]: Finished difference Result 136 states and 162 transitions. [2021-08-27 07:16:35,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-27 07:16:35,089 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-08-27 07:16:35,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:35,090 INFO L225 Difference]: With dead ends: 136 [2021-08-27 07:16:35,090 INFO L226 Difference]: Without dead ends: 136 [2021-08-27 07:16:35,091 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1174.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1903, Unknown=0, NotChecked=0, Total=2162 [2021-08-27 07:16:35,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-08-27 07:16:35,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 109. [2021-08-27 07:16:35,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 81 states have (on average 1.4567901234567902) internal successors, (118), 96 states have internal predecessors, (118), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:35,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-08-27 07:16:35,094 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 36 [2021-08-27 07:16:35,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:35,094 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-08-27 07:16:35,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 22 states have internal predecessors, (48), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:35,094 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-08-27 07:16:35,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-27 07:16:35,094 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:35,094 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:35,116 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 07:16:35,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-27 07:16:35,305 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting dll_remove_firstErr5REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:35,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:35,305 INFO L82 PathProgramCache]: Analyzing trace with hash 562523458, now seen corresponding path program 1 times [2021-08-27 07:16:35,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:35,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432818636] [2021-08-27 07:16:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:35,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:35,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:35,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:35,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:35,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:35,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:35,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432818636] [2021-08-27 07:16:35,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432818636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:35,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467000187] [2021-08-27 07:16:35,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:35,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:35,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:35,665 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 07:16:35,711 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 07:16:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:35,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-27 07:16:35,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:35,983 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 07:16:36,083 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:16:36,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-08-27 07:16:36,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 07:16:36,138 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 07:16:36,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:36,197 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 22 [2021-08-27 07:16:36,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:36,206 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 22 [2021-08-27 07:16:36,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:36,290 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:36,296 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-27 07:16:36,297 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 2 case distinctions, treesize of input 105 treesize of output 74 [2021-08-27 07:16:36,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:36,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:36,308 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 07:16:36,308 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 2 case distinctions, treesize of input 95 treesize of output 91 [2021-08-27 07:16:36,949 INFO L354 Elim1Store]: treesize reduction 65, result has 11.0 percent of original size [2021-08-27 07:16:36,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 73 [2021-08-27 07:16:36,959 INFO L354 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2021-08-27 07:16:36,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 55 treesize of output 37 [2021-08-27 07:16:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:37,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467000187] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:37,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:37,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 34 [2021-08-27 07:16:37,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266840530] [2021-08-27 07:16:37,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-27 07:16:37,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:37,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-27 07:16:37,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2021-08-27 07:16:37,031 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:39,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:39,705 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-08-27 07:16:39,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-27 07:16:39,705 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2021-08-27 07:16:39,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:39,706 INFO L225 Difference]: With dead ends: 143 [2021-08-27 07:16:39,706 INFO L226 Difference]: Without dead ends: 143 [2021-08-27 07:16:39,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2405.9ms TimeCoverageRelationStatistics Valid=348, Invalid=2958, Unknown=0, NotChecked=0, Total=3306 [2021-08-27 07:16:39,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-08-27 07:16:39,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 123. [2021-08-27 07:16:39,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4623655913978495) internal successors, (136), 110 states have internal predecessors, (136), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:39,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 150 transitions. [2021-08-27 07:16:39,710 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 150 transitions. Word has length 36 [2021-08-27 07:16:39,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:39,710 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 150 transitions. [2021-08-27 07:16:39,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 29 states have internal predecessors, (59), 4 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-08-27 07:16:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 150 transitions. [2021-08-27 07:16:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-27 07:16:39,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:39,711 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:16:39,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-27 07:16:39,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-27 07:16:39,932 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:39,932 INFO L82 PathProgramCache]: Analyzing trace with hash -580837085, now seen corresponding path program 1 times [2021-08-27 07:16:39,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:39,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260129602] [2021-08-27 07:16:39,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:39,932 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:39,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:39,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:40,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:40,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:40,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:16:40,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:40,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260129602] [2021-08-27 07:16:40,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260129602] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:40,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:40,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-08-27 07:16:40,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183441176] [2021-08-27 07:16:40,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-27 07:16:40,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:40,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-27 07:16:40,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:16:40,034 INFO L87 Difference]: Start difference. First operand 123 states and 150 transitions. Second operand has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 07:16:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:40,408 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2021-08-27 07:16:40,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:16:40,408 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 38 [2021-08-27 07:16:40,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:40,409 INFO L225 Difference]: With dead ends: 142 [2021-08-27 07:16:40,409 INFO L226 Difference]: Without dead ends: 142 [2021-08-27 07:16:40,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-08-27 07:16:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-08-27 07:16:40,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 123. [2021-08-27 07:16:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4408602150537635) internal successors, (134), 110 states have internal predecessors, (134), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:40,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 148 transitions. [2021-08-27 07:16:40,413 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 148 transitions. Word has length 38 [2021-08-27 07:16:40,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:40,413 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 148 transitions. [2021-08-27 07:16:40,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.909090909090909) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 07:16:40,413 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 148 transitions. [2021-08-27 07:16:40,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-27 07:16:40,414 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:40,414 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:16:40,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-27 07:16:40,414 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:40,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:40,415 INFO L82 PathProgramCache]: Analyzing trace with hash -826080384, now seen corresponding path program 1 times [2021-08-27 07:16:40,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:40,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129066886] [2021-08-27 07:16:40,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:40,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:40,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:40,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:40,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:40,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:40,609 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:16:40,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:40,609 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129066886] [2021-08-27 07:16:40,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129066886] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:40,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:40,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-08-27 07:16:40,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031745217] [2021-08-27 07:16:40,610 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-27 07:16:40,610 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:40,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-27 07:16:40,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-08-27 07:16:40,611 INFO L87 Difference]: Start difference. First operand 123 states and 148 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:41,085 INFO L93 Difference]: Finished difference Result 141 states and 161 transitions. [2021-08-27 07:16:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-27 07:16:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-08-27 07:16:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:41,086 INFO L225 Difference]: With dead ends: 141 [2021-08-27 07:16:41,086 INFO L226 Difference]: Without dead ends: 141 [2021-08-27 07:16:41,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 314.3ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-08-27 07:16:41,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-08-27 07:16:41,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 123. [2021-08-27 07:16:41,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.4193548387096775) internal successors, (132), 110 states have internal predecessors, (132), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:41,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 146 transitions. [2021-08-27 07:16:41,089 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 146 transitions. Word has length 39 [2021-08-27 07:16:41,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:41,090 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 146 transitions. [2021-08-27 07:16:41,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 11 states have internal predecessors, (33), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:41,090 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 146 transitions. [2021-08-27 07:16:41,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 07:16:41,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:41,090 INFO L512 BasicCegarLoop]: trace histogram [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] [2021-08-27 07:16:41,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-27 07:16:41,091 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:41,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:41,091 INFO L82 PathProgramCache]: Analyzing trace with hash 161311941, now seen corresponding path program 1 times [2021-08-27 07:16:41,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:41,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882460509] [2021-08-27 07:16:41,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:41,092 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:41,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,200 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-27 07:16:41,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:41,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882460509] [2021-08-27 07:16:41,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882460509] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:41,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:41,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-08-27 07:16:41,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179498158] [2021-08-27 07:16:41,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-27 07:16:41,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:41,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-27 07:16:41,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:16:41,202 INFO L87 Difference]: Start difference. First operand 123 states and 146 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 07:16:41,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:41,555 INFO L93 Difference]: Finished difference Result 138 states and 159 transitions. [2021-08-27 07:16:41,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 07:16:41,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 40 [2021-08-27 07:16:41,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:41,556 INFO L225 Difference]: With dead ends: 138 [2021-08-27 07:16:41,556 INFO L226 Difference]: Without dead ends: 138 [2021-08-27 07:16:41,557 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-27 07:16:41,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-08-27 07:16:41,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 123. [2021-08-27 07:16:41,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 93 states have (on average 1.3978494623655915) internal successors, (130), 110 states have internal predecessors, (130), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:16:41,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 144 transitions. [2021-08-27 07:16:41,559 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 144 transitions. Word has length 40 [2021-08-27 07:16:41,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:41,559 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 144 transitions. [2021-08-27 07:16:41,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 4 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 07:16:41,560 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 144 transitions. [2021-08-27 07:16:41,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-27 07:16:41,560 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:41,560 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:16:41,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-27 07:16:41,560 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting dll_remove_firstErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:41,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:41,561 INFO L82 PathProgramCache]: Analyzing trace with hash 649158825, now seen corresponding path program 2 times [2021-08-27 07:16:41,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:41,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750936155] [2021-08-27 07:16:41,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:41,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:41,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:41,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:41,631 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:41,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:41,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750936155] [2021-08-27 07:16:41,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750936155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:41,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682299324] [2021-08-27 07:16:41,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-27 07:16:41,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:41,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:41,633 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 07:16:41,660 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 07:16:41,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-27 07:16:41,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-27 07:16:41,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-27 07:16:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:42,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:42,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682299324] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:42,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:42,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 11 [2021-08-27 07:16:42,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988562313] [2021-08-27 07:16:42,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:16:42,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:42,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:16:42,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:16:42,026 INFO L87 Difference]: Start difference. First operand 123 states and 144 transitions. Second operand has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:42,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:42,185 INFO L93 Difference]: Finished difference Result 93 states and 96 transitions. [2021-08-27 07:16:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:16:42,194 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 40 [2021-08-27 07:16:42,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:42,195 INFO L225 Difference]: With dead ends: 93 [2021-08-27 07:16:42,195 INFO L226 Difference]: Without dead ends: 82 [2021-08-27 07:16:42,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.4ms TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:16:42,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-08-27 07:16:42,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2021-08-27 07:16:42,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 66 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:16:42,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2021-08-27 07:16:42,199 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 40 [2021-08-27 07:16:42,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:42,199 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2021-08-27 07:16:42,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-27 07:16:42,199 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2021-08-27 07:16:42,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-27 07:16:42,200 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:42,200 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:42,220 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 07:16:42,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:42,407 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting dll_remove_firstErr11REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:42,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:42,408 INFO L82 PathProgramCache]: Analyzing trace with hash 705702947, now seen corresponding path program 1 times [2021-08-27 07:16:42,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:42,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094116104] [2021-08-27 07:16:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:42,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:42,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:16:42,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:42,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094116104] [2021-08-27 07:16:42,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094116104] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:42,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:42,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 07:16:42,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508018654] [2021-08-27 07:16:42,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-27 07:16:42,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:42,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-27 07:16:42,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-08-27 07:16:42,504 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:42,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:42,771 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-08-27 07:16:42,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-27 07:16:42,772 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2021-08-27 07:16:42,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:42,772 INFO L225 Difference]: With dead ends: 81 [2021-08-27 07:16:42,772 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 07:16:42,773 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-08-27 07:16:42,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 07:16:42,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-08-27 07:16:42,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 65 states have internal predecessors, (66), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:16:42,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-08-27 07:16:42,774 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 41 [2021-08-27 07:16:42,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:42,774 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-08-27 07:16:42,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 07:16:42,774 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-08-27 07:16:42,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-27 07:16:42,775 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:42,775 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2021-08-27 07:16:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-27 07:16:42,775 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash -237952112, now seen corresponding path program 1 times [2021-08-27 07:16:42,775 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:42,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208969673] [2021-08-27 07:16:42,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:42,775 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:42,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:16:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:16:42,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:42,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208969673] [2021-08-27 07:16:42,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208969673] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:16:42,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:16:42,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 07:16:42,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953913501] [2021-08-27 07:16:42,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-27 07:16:42,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:42,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-27 07:16:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:16:42,848 INFO L87 Difference]: Start difference. First operand 74 states and 75 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:16:43,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:43,042 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2021-08-27 07:16:43,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 07:16:43,043 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 46 [2021-08-27 07:16:43,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:43,044 INFO L225 Difference]: With dead ends: 79 [2021-08-27 07:16:43,044 INFO L226 Difference]: Without dead ends: 79 [2021-08-27 07:16:43,044 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 127.5ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-08-27 07:16:43,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-27 07:16:43,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2021-08-27 07:16:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 63 states have internal predecessors, (64), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:16:43,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2021-08-27 07:16:43,046 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 46 [2021-08-27 07:16:43,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:43,047 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2021-08-27 07:16:43,047 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, (4), 4 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:16:43,047 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2021-08-27 07:16:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-27 07:16:43,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:43,047 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-08-27 07:16:43,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-27 07:16:43,048 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:43,048 INFO L82 PathProgramCache]: Analyzing trace with hash -1038711118, now seen corresponding path program 1 times [2021-08-27 07:16:43,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:43,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34764623] [2021-08-27 07:16:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:43,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:43,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:43,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:16:43,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,127 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:16:43,127 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34764623] [2021-08-27 07:16:43,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34764623] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:43,127 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040868821] [2021-08-27 07:16:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:43,127 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:43,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:43,129 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 07:16:43,164 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 07:16:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-27 07:16:43,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:43,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-08-27 07:16:43,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040868821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:43,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:43,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 9 [2021-08-27 07:16:43,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001763774] [2021-08-27 07:16:43,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:16:43,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:43,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:16:43,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:16:43,522 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:16:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:43,650 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2021-08-27 07:16:43,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 07:16:43,652 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 48 [2021-08-27 07:16:43,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:43,653 INFO L225 Difference]: With dead ends: 81 [2021-08-27 07:16:43,653 INFO L226 Difference]: Without dead ends: 81 [2021-08-27 07:16:43,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-27 07:16:43,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-27 07:16:43,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2021-08-27 07:16:43,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 64 states have internal predecessors, (66), 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 07:16:43,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2021-08-27 07:16:43,655 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 48 [2021-08-27 07:16:43,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:43,655 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2021-08-27 07:16:43,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 6 states have internal predecessors, (40), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:16:43,655 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2021-08-27 07:16:43,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 07:16:43,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:43,656 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:43,675 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 07:16:43,868 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,SelfDestructingSolverStorable21 [2021-08-27 07:16:43,869 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:43,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:43,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2131651961, now seen corresponding path program 1 times [2021-08-27 07:16:43,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:43,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518746452] [2021-08-27 07:16:43,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:43,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:43,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:44,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:16:44,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:44,508 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:44,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:44,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518746452] [2021-08-27 07:16:44,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518746452] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:44,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420108732] [2021-08-27 07:16:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:44,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:44,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:44,509 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:16:44,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-27 07:16:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:44,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 87 conjunts are in the unsatisfiable core [2021-08-27 07:16:44,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:44,836 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 07:16:45,065 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 13 treesize of output 9 [2021-08-27 07:16:45,070 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 13 treesize of output 9 [2021-08-27 07:16:45,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:45,136 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:16:45,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:45,146 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:16:45,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:45,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:45,237 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-27 07:16:45,238 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 2 case distinctions, treesize of input 99 treesize of output 74 [2021-08-27 07:16:45,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:45,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:45,249 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-08-27 07:16:45,251 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 2 case distinctions, treesize of input 89 treesize of output 85 [2021-08-27 07:16:45,532 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-27 07:16:45,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:16:46,247 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-08-27 07:16:46,248 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 16 treesize of output 26 [2021-08-27 07:16:46,492 INFO L354 Elim1Store]: treesize reduction 271, result has 11.4 percent of original size [2021-08-27 07:16:46,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 504 treesize of output 236 [2021-08-27 07:16:46,513 INFO L354 Elim1Store]: treesize reduction 54, result has 5.3 percent of original size [2021-08-27 07:16:46,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 244 treesize of output 178 [2021-08-27 07:16:47,011 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-08-27 07:16:47,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 71 treesize of output 38 [2021-08-27 07:16:47,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:47,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420108732] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:47,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:47,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 27] total 50 [2021-08-27 07:16:47,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708498481] [2021-08-27 07:16:47,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-27 07:16:47,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:47,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-27 07:16:47,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=2406, Unknown=0, NotChecked=0, Total=2550 [2021-08-27 07:16:47,063 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:16:49,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:49,354 INFO L93 Difference]: Finished difference Result 101 states and 105 transitions. [2021-08-27 07:16:49,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-27 07:16:49,355 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-08-27 07:16:49,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:49,355 INFO L225 Difference]: With dead ends: 101 [2021-08-27 07:16:49,355 INFO L226 Difference]: Without dead ends: 101 [2021-08-27 07:16:49,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1135 ImplicationChecksByTransitivity, 2822.8ms TimeCoverageRelationStatistics Valid=449, Invalid=5251, Unknown=0, NotChecked=0, Total=5700 [2021-08-27 07:16:49,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-08-27 07:16:49,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2021-08-27 07:16:49,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 67 states have internal predecessors, (70), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:16:49,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2021-08-27 07:16:49,359 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 49 [2021-08-27 07:16:49,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:49,359 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2021-08-27 07:16:49,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 49 states have (on average 1.653061224489796) internal successors, (81), 43 states have internal predecessors, (81), 6 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:16:49,359 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2021-08-27 07:16:49,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-27 07:16:49,360 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:49,360 INFO L512 BasicCegarLoop]: trace histogram [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 07:16:49,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-08-27 07:16:49,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-27 07:16:49,567 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting dll_remove_firstErr3REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:49,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:49,567 INFO L82 PathProgramCache]: Analyzing trace with hash -2131651960, now seen corresponding path program 1 times [2021-08-27 07:16:49,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:49,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525794994] [2021-08-27 07:16:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:49,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:49,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:49,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:49,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:49,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:49,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:16:49,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:50,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:50,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525794994] [2021-08-27 07:16:50,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525794994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:50,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318688007] [2021-08-27 07:16:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:50,099 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:50,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:50,100 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:16:50,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-27 07:16:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 72 conjunts are in the unsatisfiable core [2021-08-27 07:16:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:50,542 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 07:16:50,599 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:16:50,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-08-27 07:16:50,626 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 07:16:50,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:50,664 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 22 [2021-08-27 07:16:50,718 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:50,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:50,724 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-27 07:16:50,724 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 2 case distinctions, treesize of input 34 treesize of output 36 [2021-08-27 07:16:51,296 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 33 treesize of output 29 [2021-08-27 07:16:51,300 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 25 treesize of output 21 [2021-08-27 07:16:51,358 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 107 treesize of output 87 [2021-08-27 07:16:51,378 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-27 07:16:51,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 53 [2021-08-27 07:16:51,532 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 37 treesize of output 29 [2021-08-27 07:16:51,534 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 26 treesize of output 14 [2021-08-27 07:16:51,565 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:51,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318688007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:51,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:51,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 42 [2021-08-27 07:16:51,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561140935] [2021-08-27 07:16:51,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-27 07:16:51,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:51,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-27 07:16:51,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-08-27 07:16:51,566 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:16:53,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:16:53,555 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2021-08-27 07:16:53,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-27 07:16:53,556 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 49 [2021-08-27 07:16:53,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:16:53,557 INFO L225 Difference]: With dead ends: 118 [2021-08-27 07:16:53,557 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 07:16:53,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 1898.7ms TimeCoverageRelationStatistics Valid=424, Invalid=4406, Unknown=0, NotChecked=0, Total=4830 [2021-08-27 07:16:53,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 07:16:53,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2021-08-27 07:16:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 73 states have (on average 1.2328767123287672) internal successors, (90), 83 states have internal predecessors, (90), 6 states have call successors, (6), 6 states have call predecessors, (6), 6 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-08-27 07:16:53,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 103 transitions. [2021-08-27 07:16:53,560 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 103 transitions. Word has length 49 [2021-08-27 07:16:53,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:16:53,560 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 103 transitions. [2021-08-27 07:16:53,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 35 states have internal predecessors, (74), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:16:53,560 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 103 transitions. [2021-08-27 07:16:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-27 07:16:53,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:16:53,561 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] [2021-08-27 07:16:53,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-27 07:16:53,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-27 07:16:53,769 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting dll_remove_firstErr4REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:16:53,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:16:53,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1342859665, now seen corresponding path program 1 times [2021-08-27 07:16:53,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:16:53,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101098578] [2021-08-27 07:16:53,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:53,769 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:16:53,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:53,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:16:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:54,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:16:54,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:54,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:16:54,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:55,250 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:16:55,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101098578] [2021-08-27 07:16:55,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101098578] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:55,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172079712] [2021-08-27 07:16:55,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:16:55,251 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:16:55,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:16:55,251 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:16:55,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-27 07:16:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:16:55,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 104 conjunts are in the unsatisfiable core [2021-08-27 07:16:55,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:16:55,723 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 07:16:55,928 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 13 treesize of output 9 [2021-08-27 07:16:55,932 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 13 treesize of output 9 [2021-08-27 07:16:55,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:55,996 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:16:56,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,002 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:16:56,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-08-27 07:16:56,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 21 [2021-08-27 07:16:56,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:16:56,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:16:56,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-08-27 07:16:56,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,415 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 42 [2021-08-27 07:16:56,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:56,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:56,573 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-08-27 07:16:56,573 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 151 treesize of output 101 [2021-08-27 07:16:56,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:16:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:56,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:16:56,584 INFO L354 Elim1Store]: treesize reduction 59, result has 13.2 percent of original size [2021-08-27 07:16:56,584 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 4 new quantified variables, introduced 7 case distinctions, treesize of input 128 treesize of output 117 [2021-08-27 07:16:56,950 INFO L354 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2021-08-27 07:16:56,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2021-08-27 07:16:58,009 INFO L354 Elim1Store]: treesize reduction 321, result has 11.6 percent of original size [2021-08-27 07:16:58,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 436 treesize of output 209 [2021-08-27 07:16:58,080 INFO L354 Elim1Store]: treesize reduction 349, result has 10.3 percent of original size [2021-08-27 07:16:58,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 210 treesize of output 147 [2021-08-27 07:16:58,735 INFO L354 Elim1Store]: treesize reduction 99, result has 7.5 percent of original size [2021-08-27 07:16:58,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 142 treesize of output 93 [2021-08-27 07:16:58,747 INFO L354 Elim1Store]: treesize reduction 66, result has 4.3 percent of original size [2021-08-27 07:16:58,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 46 [2021-08-27 07:16:58,762 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:16:58,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172079712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:16:58,763 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:16:58,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 57 [2021-08-27 07:16:58,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247521053] [2021-08-27 07:16:58,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-27 07:16:58,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:16:58,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-27 07:16:58,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=3049, Unknown=0, NotChecked=0, Total=3192 [2021-08-27 07:16:58,764 INFO L87 Difference]: Start difference. First operand 94 states and 103 transitions. Second operand has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:17:04,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:04,062 INFO L93 Difference]: Finished difference Result 100 states and 101 transitions. [2021-08-27 07:17:04,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-27 07:17:04,063 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 52 [2021-08-27 07:17:04,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:04,063 INFO L225 Difference]: With dead ends: 100 [2021-08-27 07:17:04,063 INFO L226 Difference]: Without dead ends: 100 [2021-08-27 07:17:04,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1148 ImplicationChecksByTransitivity, 5548.5ms TimeCoverageRelationStatistics Valid=467, Invalid=7543, Unknown=0, NotChecked=0, Total=8010 [2021-08-27 07:17:04,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-27 07:17:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 87. [2021-08-27 07:17:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 76 states have internal predecessors, (80), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:17:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2021-08-27 07:17:04,067 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 52 [2021-08-27 07:17:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:04,067 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2021-08-27 07:17:04,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 1.5272727272727273) internal successors, (84), 48 states have internal predecessors, (84), 7 states have call successors, (9), 8 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-08-27 07:17:04,068 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2021-08-27 07:17:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-27 07:17:04,068 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:04,068 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] [2021-08-27 07:17:04,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-27 07:17:04,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:04,281 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:04,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:04,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1321018351, now seen corresponding path program 1 times [2021-08-27 07:17:04,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:04,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395339588] [2021-08-27 07:17:04,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:04,282 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:04,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:04,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:04,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:17:04,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:04,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395339588] [2021-08-27 07:17:04,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395339588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:04,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171776550] [2021-08-27 07:17:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:04,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:04,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:17:04,738 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:17:04,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-27 07:17:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:05,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-27 07:17:05,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:17:05,333 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 07:17:05,372 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:17:05,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-08-27 07:17:05,407 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 07:17:05,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:05,443 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 22 [2021-08-27 07:17:05,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:05,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-27 07:17:05,511 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-08-27 07:17:05,512 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 2 case distinctions, treesize of input 34 treesize of output 36 [2021-08-27 07:17:05,997 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 25 treesize of output 21 [2021-08-27 07:17:06,040 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 82 treesize of output 66 [2021-08-27 07:17:06,055 INFO L354 Elim1Store]: treesize reduction 94, result has 3.1 percent of original size [2021-08-27 07:17:06,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 10 case distinctions, treesize of input 66 treesize of output 42 [2021-08-27 07:17:06,173 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 15 treesize of output 7 [2021-08-27 07:17:06,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:17:06,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171776550] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:06,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:17:06,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-08-27 07:17:06,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450670317] [2021-08-27 07:17:06,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 07:17:06,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:06,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 07:17:06,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1525, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 07:17:06,178 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:17:08,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:08,539 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2021-08-27 07:17:08,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-27 07:17:08,540 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 53 [2021-08-27 07:17:08,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:08,540 INFO L225 Difference]: With dead ends: 128 [2021-08-27 07:17:08,540 INFO L226 Difference]: Without dead ends: 128 [2021-08-27 07:17:08,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2345.5ms TimeCoverageRelationStatistics Valid=647, Invalid=5515, Unknown=0, NotChecked=0, Total=6162 [2021-08-27 07:17:08,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-08-27 07:17:08,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2021-08-27 07:17:08,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.2409638554216869) internal successors, (103), 92 states have internal predecessors, (103), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:17:08,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2021-08-27 07:17:08,544 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 53 [2021-08-27 07:17:08,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:08,544 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2021-08-27 07:17:08,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.076923076923077) internal successors, (81), 33 states have internal predecessors, (81), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:17:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2021-08-27 07:17:08,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-27 07:17:08,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:08,545 INFO L512 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-08-27 07:17:08,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-27 07:17:08,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-27 07:17:08,749 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:08,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1998104146, now seen corresponding path program 1 times [2021-08-27 07:17:08,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:08,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882901489] [2021-08-27 07:17:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:08,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:08,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:08,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:08,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:09,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:09,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:09,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:17:09,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:09,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882901489] [2021-08-27 07:17:09,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882901489] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:09,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810905583] [2021-08-27 07:17:09,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:09,249 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:09,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:17:09,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:17:09,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-27 07:17:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-27 07:17:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:17:09,902 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 07:17:09,950 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-08-27 07:17:09,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 11 treesize of output 11 [2021-08-27 07:17:09,973 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 07:17:10,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:10,012 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 22 [2021-08-27 07:17:10,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:10,084 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-08-27 07:17:10,084 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 3 case distinctions, treesize of input 56 treesize of output 43 [2021-08-27 07:17:10,391 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-08-27 07:17:10,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 29 [2021-08-27 07:17:10,602 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 25 treesize of output 21 [2021-08-27 07:17:10,652 INFO L354 Elim1Store]: treesize reduction 106, result has 2.8 percent of original size [2021-08-27 07:17:10,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 39 [2021-08-27 07:17:10,654 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 17 treesize of output 13 [2021-08-27 07:17:10,784 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 17 treesize of output 9 [2021-08-27 07:17:10,789 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 07:17:10,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810905583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:10,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:17:10,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22] total 40 [2021-08-27 07:17:10,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499224739] [2021-08-27 07:17:10,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-27 07:17:10,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:10,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-27 07:17:10,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2021-08-27 07:17:10,790 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:17:12,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:12,651 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-08-27 07:17:12,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-27 07:17:12,651 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2021-08-27 07:17:12,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:12,652 INFO L225 Difference]: With dead ends: 114 [2021-08-27 07:17:12,652 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 07:17:12,653 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1869.3ms TimeCoverageRelationStatistics Valid=407, Invalid=4015, Unknown=0, NotChecked=0, Total=4422 [2021-08-27 07:17:12,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 07:17:12,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 105. [2021-08-27 07:17:12,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 92 states have internal predecessors, (102), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:17:12,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2021-08-27 07:17:12,656 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 54 [2021-08-27 07:17:12,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:12,656 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2021-08-27 07:17:12,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 39 states have (on average 2.1025641025641026) internal successors, (82), 33 states have internal predecessors, (82), 6 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-08-27 07:17:12,656 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2021-08-27 07:17:12,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-27 07:17:12,656 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:12,657 INFO L512 BasicCegarLoop]: trace histogram [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, 1] [2021-08-27 07:17:12,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-27 07:17:12,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-27 07:17:12,873 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:12,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:12,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1811686451, now seen corresponding path program 1 times [2021-08-27 07:17:12,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:12,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527591118] [2021-08-27 07:17:12,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:12,873 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:12,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:12,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:12,941 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 07:17:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527591118] [2021-08-27 07:17:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527591118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161203060] [2021-08-27 07:17:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:12,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:17:12,943 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:17:12,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-27 07:17:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:13,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 07:17:13,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:17:13,803 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 17 treesize of output 9 [2021-08-27 07:17:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-08-27 07:17:13,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161203060] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:17:13,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-27 07:17:13,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 7 [2021-08-27 07:17:13,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838566998] [2021-08-27 07:17:13,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 07:17:13,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 07:17:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-27 07:17:13,810 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:17:13,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:13,856 INFO L93 Difference]: Finished difference Result 111 states and 120 transitions. [2021-08-27 07:17:13,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 07:17:13,857 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-08-27 07:17:13,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:13,857 INFO L225 Difference]: With dead ends: 111 [2021-08-27 07:17:13,857 INFO L226 Difference]: Without dead ends: 111 [2021-08-27 07:17:13,857 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.7ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:17:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-27 07:17:13,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2021-08-27 07:17:13,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 96 states have internal predecessors, (106), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-08-27 07:17:13,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2021-08-27 07:17:13,860 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 55 [2021-08-27 07:17:13,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:13,860 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2021-08-27 07:17:13,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.75) internal successors, (39), 5 states have internal predecessors, (39), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-08-27 07:17:13,860 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2021-08-27 07:17:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-27 07:17:13,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:13,861 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, 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 07:17:13,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-27 07:17:14,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-27 07:17:14,061 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr2ASSERT_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:14,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:14,061 INFO L82 PathProgramCache]: Analyzing trace with hash -2026508256, now seen corresponding path program 1 times [2021-08-27 07:17:14,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:14,062 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575195755] [2021-08-27 07:17:14,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:14,062 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:14,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:14,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:14,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 07:17:14,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,171 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-08-27 07:17:14,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:14,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575195755] [2021-08-27 07:17:14,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575195755] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:17:14,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:17:14,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-08-27 07:17:14,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013513232] [2021-08-27 07:17:14,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 07:17:14,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:14,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 07:17:14,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-08-27 07:17:14,173 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:17:14,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:14,540 INFO L93 Difference]: Finished difference Result 144 states and 157 transitions. [2021-08-27 07:17:14,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-27 07:17:14,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 63 [2021-08-27 07:17:14,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:14,542 INFO L225 Difference]: With dead ends: 144 [2021-08-27 07:17:14,542 INFO L226 Difference]: Without dead ends: 144 [2021-08-27 07:17:14,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-08-27 07:17:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-08-27 07:17:14,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 116. [2021-08-27 07:17:14,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 102 states have internal predecessors, (113), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 07:17:14,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 128 transitions. [2021-08-27 07:17:14,545 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 128 transitions. Word has length 63 [2021-08-27 07:17:14,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:14,545 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 128 transitions. [2021-08-27 07:17:14,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 7 states have internal predecessors, (47), 1 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-08-27 07:17:14,545 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 128 transitions. [2021-08-27 07:17:14,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-08-27 07:17:14,545 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:14,545 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, 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 07:17:14,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-08-27 07:17:14,546 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr3ENSURES_VIOLATIONMEMORY_LEAK === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:14,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2026508191, now seen corresponding path program 1 times [2021-08-27 07:17:14,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:14,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151552232] [2021-08-27 07:17:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:14,546 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:14,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:15,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:15,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 07:17:15,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-27 07:17:15,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:15,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151552232] [2021-08-27 07:17:15,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151552232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:15,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021791527] [2021-08-27 07:17:15,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:15,594 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:15,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 07:17:15,597 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-27 07:17:15,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-27 07:17:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:16,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 93 conjunts are in the unsatisfiable core [2021-08-27 07:17:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 07:17:16,486 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 13 treesize of output 9 [2021-08-27 07:17:16,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:16,542 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 0 case distinctions, treesize of input 23 treesize of output 22 [2021-08-27 07:17:16,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-27 07:17:16,629 INFO L354 Elim1Store]: treesize reduction 68, result has 21.8 percent of original size [2021-08-27 07:17:16,629 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 3 case distinctions, treesize of input 77 treesize of output 64 [2021-08-27 07:17:17,661 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 184 treesize of output 180 [2021-08-27 07:17:17,824 INFO L354 Elim1Store]: treesize reduction 406, result has 11.7 percent of original size [2021-08-27 07:17:17,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 319 treesize of output 183 [2021-08-27 07:17:17,828 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 232 treesize of output 196 [2021-08-27 07:17:18,606 INFO L354 Elim1Store]: treesize reduction 54, result has 1.8 percent of original size [2021-08-27 07:17:18,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 108 treesize of output 69 [2021-08-27 07:17:18,608 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 57 treesize of output 53 [2021-08-27 07:17:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-27 07:17:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021791527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-27 07:17:18,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-27 07:17:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 55 [2021-08-27 07:17:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860961496] [2021-08-27 07:17:18,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-27 07:17:18,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:18,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-27 07:17:18,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=2911, Unknown=0, NotChecked=0, Total=3080 [2021-08-27 07:17:18,930 INFO L87 Difference]: Start difference. First operand 116 states and 128 transitions. Second operand has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:17:21,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:21,427 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2021-08-27 07:17:21,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-27 07:17:21,428 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 63 [2021-08-27 07:17:21,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:21,428 INFO L225 Difference]: With dead ends: 124 [2021-08-27 07:17:21,428 INFO L226 Difference]: Without dead ends: 121 [2021-08-27 07:17:21,429 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1301 ImplicationChecksByTransitivity, 2886.1ms TimeCoverageRelationStatistics Valid=371, Invalid=5179, Unknown=0, NotChecked=0, Total=5550 [2021-08-27 07:17:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-27 07:17:21,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2021-08-27 07:17:21,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 103 states have internal predecessors, (115), 7 states have call successors, (7), 7 states have call predecessors, (7), 7 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-08-27 07:17:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 130 transitions. [2021-08-27 07:17:21,432 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 130 transitions. Word has length 63 [2021-08-27 07:17:21,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:21,432 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 130 transitions. [2021-08-27 07:17:21,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 54 states have (on average 1.8888888888888888) internal successors, (102), 50 states have internal predecessors, (102), 7 states have call successors, (9), 6 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-08-27 07:17:21,433 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 130 transitions. [2021-08-27 07:17:21,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-27 07:17:21,433 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 07:17:21,433 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 07:17:21,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2021-08-27 07:17:21,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-27 07:17:21,650 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting dll_remove_firstErr2REQUIRES_VIOLATION === [dll_remove_firstErr0REQUIRES_VIOLATION, dll_remove_firstErr1REQUIRES_VIOLATION, dll_remove_firstErr2REQUIRES_VIOLATION, dll_remove_firstErr3REQUIRES_VIOLATION (and 27 more)] === [2021-08-27 07:17:21,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 07:17:21,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1606375129, now seen corresponding path program 1 times [2021-08-27 07:17:21,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 07:17:21,651 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430087668] [2021-08-27 07:17:21,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 07:17:21,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 07:17:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:21,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 07:17:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:21,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-08-27 07:17:21,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:21,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-08-27 07:17:21,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:21,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-08-27 07:17:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 07:17:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-08-27 07:17:21,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 07:17:21,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430087668] [2021-08-27 07:17:21,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430087668] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 07:17:21,735 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 07:17:21,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-08-27 07:17:21,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216714175] [2021-08-27 07:17:21,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 07:17:21,736 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 07:17:21,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 07:17:21,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-08-27 07:17:21,736 INFO L87 Difference]: Start difference. First operand 118 states and 130 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:17:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 07:17:21,830 INFO L93 Difference]: Finished difference Result 60 states and 59 transitions. [2021-08-27 07:17:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 07:17:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 64 [2021-08-27 07:17:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 07:17:21,831 INFO L225 Difference]: With dead ends: 60 [2021-08-27 07:17:21,831 INFO L226 Difference]: Without dead ends: 0 [2021-08-27 07:17:21,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 07:17:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-27 07:17:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-27 07:17:21,832 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 07:17:21,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-27 07:17:21,832 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 64 [2021-08-27 07:17:21,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 07:17:21,832 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-27 07:17:21,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 6 states have internal predecessors, (38), 5 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-27 07:17:21,832 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-27 07:17:21,833 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-27 07:17:21,834 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr0REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr1REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr2REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr3REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr4REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr5REQUIRES_VIOLATION [2021-08-27 07:17:21,835 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr6REQUIRES_VIOLATION [2021-08-27 07:17:21,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr7REQUIRES_VIOLATION [2021-08-27 07:17:21,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr8ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:17:21,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr9ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:17:21,836 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr10ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr11REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_remove_firstErr12REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr0REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr1REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr2REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr3REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr4REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location node_createErr5REQUIRES_VIOLATION [2021-08-27 07:17:21,837 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr1REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr3ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr0REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr1REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr2REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr3REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr4REQUIRES_VIOLATION [2021-08-27 07:17:21,838 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr5REQUIRES_VIOLATION [2021-08-27 07:17:21,839 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr6REQUIRES_VIOLATION [2021-08-27 07:17:21,839 INFO L764 garLoopResultBuilder]: Registering result SAFE for location dll_createErr7REQUIRES_VIOLATION [2021-08-27 07:17:21,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-08-27 07:17:21,844 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 07:17:21,846 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 07:17:21 BoogieIcfgContainer [2021-08-27 07:17:21,846 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 07:17:21,847 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 07:17:21,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 07:17:21,847 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 07:17:21,848 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 07:16:22" (3/4) ... [2021-08-27 07:17:21,849 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-27 07:17:21,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure reach_error [2021-08-27 07:17:21,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2021-08-27 07:17:21,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure myexit [2021-08-27 07:17:21,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_create [2021-08-27 07:17:21,854 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_32 [2021-08-27 07:17:21,855 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure __bswap_64 [2021-08-27 07:17:21,855 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2021-08-27 07:17:21,855 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure node_create [2021-08-27 07:17:21,855 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure dll_remove_first [2021-08-27 07:17:21,859 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2021-08-27 07:17:21,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-08-27 07:17:21,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-08-27 07:17:21,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-27 07:17:21,889 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 07:17:21,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 07:17:21,891 INFO L168 Benchmark]: Toolchain (without parser) took 59984.69 ms. Allocated memory was 56.6 MB in the beginning and 469.8 MB in the end (delta: 413.1 MB). Free memory was 33.4 MB in the beginning and 316.8 MB in the end (delta: -283.4 MB). Peak memory consumption was 130.7 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,891 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.0 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 07:17:21,891 INFO L168 Benchmark]: CACSL2BoogieTranslator took 287.29 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 32.6 MB in the end (delta: 592.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,892 INFO L168 Benchmark]: Boogie Preprocessor took 46.01 ms. Allocated memory is still 56.6 MB. Free memory was 32.6 MB in the beginning and 30.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,892 INFO L168 Benchmark]: RCFGBuilder took 540.59 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 30.0 MB in the beginning and 42.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,892 INFO L168 Benchmark]: TraceAbstraction took 59063.24 ms. Allocated memory was 69.2 MB in the beginning and 469.8 MB in the end (delta: 400.6 MB). Free memory was 42.0 MB in the beginning and 319.9 MB in the end (delta: -277.9 MB). Peak memory consumption was 121.7 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,892 INFO L168 Benchmark]: Witness Printer took 43.25 ms. Allocated memory is still 469.8 MB. Free memory was 319.9 MB in the beginning and 316.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 07:17:21,894 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 56.6 MB. Free memory was 38.1 MB in the beginning and 38.0 MB in the end (delta: 44.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 287.29 ms. Allocated memory is still 56.6 MB. Free memory was 33.2 MB in the beginning and 32.6 MB in the end (delta: 592.3 kB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.01 ms. Allocated memory is still 56.6 MB. Free memory was 32.6 MB in the beginning and 30.0 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 540.59 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 30.0 MB in the beginning and 42.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 18.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 59063.24 ms. Allocated memory was 69.2 MB in the beginning and 469.8 MB in the end (delta: 400.6 MB). Free memory was 42.0 MB in the beginning and 319.9 MB in the end (delta: -277.9 MB). Peak memory consumption was 121.7 MB. Max. memory is 16.1 GB. * Witness Printer took 43.25 ms. Allocated memory is still 469.8 MB. Free memory was 319.9 MB in the beginning and 316.8 MB in the end (delta: 3.1 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: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 604]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 606]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 608]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 609]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 609]: 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: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 581]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 582]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 619]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 623]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 611]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 592]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 592]: 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: 596]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 596]: 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, 96 locations, 31 error locations. Started 1 CEGAR loops. OverallTime: 59018.7ms, OverallIterations: 31, TraceHistogramMax: 3, EmptinessCheckTime: 23.9ms, AutomataDifference: 26319.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1123 SDtfs, 3740 SDslu, 5985 SDs, 0 SdLazy, 20837 SolverSat, 756 SolverUnsat, 10 SolverUnknown, 0 SolverNotchecked, 10134.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1532 GetRequests, 671 SyntacticMatches, 18 SemanticMatches, 843 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8086 ImplicationChecksByTransitivity, 24257.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=123occurred in iteration=15, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 112.1ms AutomataMinimizationTime, 31 MinimizatonAttempts, 442 StatesRemovedByMinimization, 28 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 242.5ms SsaConstructionTime, 752.4ms SatisfiabilityAnalysisTime, 22084.5ms InterpolantComputationTime, 1899 NumberOfCodeBlocks, 1885 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 1850 ConstructedInterpolants, 121 QuantifiedInterpolants, 29924 SizeOfPredicates, 196 NumberOfNonLiveVariables, 4554 ConjunctsInSsa, 692 ConjunctsInUnsatCore, 49 InterpolantComputations, 15 PerfectInterpolantSequences, 251/584 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 31 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-08-27 07:17:21,938 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...