./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 5fbdf5bf 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/array-memsafety/reverse_array_alloca_unsafe.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 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-30 16:40:20,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-30 16:40:20,674 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-30 16:40:20,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-30 16:40:20,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-30 16:40:20,695 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-30 16:40:20,697 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-30 16:40:20,701 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-30 16:40:20,702 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-30 16:40:20,705 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-30 16:40:20,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-30 16:40:20,715 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-30 16:40:20,715 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-30 16:40:20,716 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-30 16:40:20,718 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-30 16:40:20,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-30 16:40:21,028 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-30 16:40:21,029 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-30 16:40:21,030 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-30 16:40:21,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-30 16:40:21,032 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-30 16:40:21,034 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-30 16:40:21,034 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-30 16:40:21,035 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-30 16:40:21,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-30 16:40:21,040 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-30 16:40:21,041 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-30 16:40:21,041 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-30 16:40:21,042 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-30 16:40:21,043 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-30 16:40:21,043 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-30 16:40:21,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-30 16:40:21,044 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-30 16:40:21,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-30 16:40:21,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-30 16:40:21,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-30 16:40:21,046 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-30 16:40:21,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-30 16:40:21,047 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-30 16:40:21,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-30 16:40:21,048 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-30 16:40:21,051 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-30 16:40:21,095 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-30 16:40:21,095 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-30 16:40:21,096 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-30 16:40:21,096 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-30 16:40:21,097 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-30 16:40:21,097 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-30 16:40:21,097 INFO L138 SettingsManager]: * Use SBE=true [2021-08-30 16:40:21,097 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-30 16:40:21,098 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-30 16:40:21,099 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-30 16:40:21,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-30 16:40:21,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:40:21,100 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-30 16:40:21,100 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-30 16:40:21,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-30 16:40:21,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-30 16:40:21,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-30 16:40:21,100 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 016c9c68c49c3eaa925dd855e3c8f320ab9c50c9 [2021-08-30 16:40:21,372 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-30 16:40:21,388 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-30 16:40:21,389 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-30 16:40:21,390 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-30 16:40:21,391 INFO L275 PluginConnector]: CDTParser initialized [2021-08-30 16:40:21,392 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-08-30 16:40:21,449 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ababd9fc2/6292b89dd0384cca87d29abc5c7af76b/FLAGe70832743 [2021-08-30 16:40:21,836 INFO L306 CDTParser]: Found 1 translation units. [2021-08-30 16:40:21,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-memsafety/reverse_array_alloca_unsafe.i [2021-08-30 16:40:21,857 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ababd9fc2/6292b89dd0384cca87d29abc5c7af76b/FLAGe70832743 [2021-08-30 16:40:21,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ababd9fc2/6292b89dd0384cca87d29abc5c7af76b [2021-08-30 16:40:21,873 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-30 16:40:21,874 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-30 16:40:21,877 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-30 16:40:21,877 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-30 16:40:21,879 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-30 16:40:21,880 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:40:21" (1/1) ... [2021-08-30 16:40:21,883 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4444f91c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:21, skipping insertion in model container [2021-08-30 16:40:21,883 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 04:40:21" (1/1) ... [2021-08-30 16:40:21,887 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-30 16:40:21,908 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-30 16:40:22,145 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:40:22,150 INFO L203 MainTranslator]: Completed pre-run [2021-08-30 16:40:22,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-30 16:40:22,206 INFO L208 MainTranslator]: Completed translation [2021-08-30 16:40:22,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22 WrapperNode [2021-08-30 16:40:22,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-30 16:40:22,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-30 16:40:22,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-30 16:40:22,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-30 16:40:22,214 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,215 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,236 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,237 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,258 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,260 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-30 16:40:22,263 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-30 16:40:22,263 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-30 16:40:22,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-30 16:40:22,267 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (1/1) ... [2021-08-30 16:40:22,271 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-30 16:40:22,278 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:22,290 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) [2021-08-30 16:40:22,310 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 [2021-08-30 16:40:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-30 16:40:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-30 16:40:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-30 16:40:22,319 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-30 16:40:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-30 16:40:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-30 16:40:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-30 16:40:22,320 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-30 16:40:22,321 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-30 16:40:22,322 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-30 16:40:22,323 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-30 16:40:22,324 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-30 16:40:22,325 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-30 16:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-30 16:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-30 16:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-30 16:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-30 16:40:22,326 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-30 16:40:22,327 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-30 16:40:22,328 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-30 16:40:22,329 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-30 16:40:22,330 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-30 16:40:22,331 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-30 16:40:22,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-30 16:40:22,598 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-08-30 16:40:22,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:22 BoogieIcfgContainer [2021-08-30 16:40:22,599 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-30 16:40:22,608 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-30 16:40:22,609 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-30 16:40:22,610 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-30 16:40:22,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 04:40:21" (1/3) ... [2021-08-30 16:40:22,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3182e060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:40:22, skipping insertion in model container [2021-08-30 16:40:22,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 04:40:22" (2/3) ... [2021-08-30 16:40:22,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3182e060 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 04:40:22, skipping insertion in model container [2021-08-30 16:40:22,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:22" (3/3) ... [2021-08-30 16:40:22,612 INFO L111 eAbstractionObserver]: Analyzing ICFG reverse_array_alloca_unsafe.i [2021-08-30 16:40:22,615 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-30 16:40:22,615 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 23 error locations. [2021-08-30 16:40:22,640 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-30 16:40:22,643 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 [2021-08-30 16:40:22,644 INFO L340 AbstractCegarLoop]: Starting to check reachability of 23 error locations. [2021-08-30 16:40:22,652 INFO L276 IsEmpty]: Start isEmpty. Operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-30 16:40:22,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:40:22,656 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:22,656 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:22,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:22,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:22,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953401, now seen corresponding path program 1 times [2021-08-30 16:40:22,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:22,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980032184] [2021-08-30 16:40:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:22,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:22,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:22,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:22,869 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:22,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980032184] [2021-08-30 16:40:22,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980032184] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:22,870 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:22,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-30 16:40:22,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304202847] [2021-08-30 16:40:22,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-30 16:40:22,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:22,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-30 16:40:22,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:40:22,897 INFO L87 Difference]: Start difference. First operand has 65 states, 37 states have (on average 1.8918918918918919) internal successors, (70), 60 states have internal predecessors, (70), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:23,240 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-08-30 16:40:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:40:23,243 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:40:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:23,248 INFO L225 Difference]: With dead ends: 125 [2021-08-30 16:40:23,248 INFO L226 Difference]: Without dead ends: 121 [2021-08-30 16:40:23,251 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 47.19ms TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-08-30 16:40:23,254 INFO L928 BasicCegarLoop]: 5 mSDtfsCounter, 125 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 553 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 233.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.86ms SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 291.86ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:23,255 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 26 Invalid, 563 Unknown, 0 Unchecked, 6.86ms Time], IncrementalHoareTripleChecker [10 Valid, 553 Invalid, 0 Unknown, 0 Unchecked, 291.86ms Time] [2021-08-30 16:40:23,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-30 16:40:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 65. [2021-08-30 16:40:23,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 61 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-08-30 16:40:23,284 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 11 [2021-08-30 16:40:23,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:23,284 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-08-30 16:40:23,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,285 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-08-30 16:40:23,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:40:23,285 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:23,285 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:23,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-30 16:40:23,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:23,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:23,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1096953402, now seen corresponding path program 1 times [2021-08-30 16:40:23,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:23,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063847576] [2021-08-30 16:40:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:23,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:23,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:23,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:23,346 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:23,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063847576] [2021-08-30 16:40:23,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063847576] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:23,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:23,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-30 16:40:23,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816755492] [2021-08-30 16:40:23,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:40:23,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:40:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:40:23,348 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:23,425 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-08-30 16:40:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-30 16:40:23,426 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:40:23,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:23,428 INFO L225 Difference]: With dead ends: 60 [2021-08-30 16:40:23,428 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:40:23,428 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.35ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:40:23,433 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 54 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.78ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.29ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:23,433 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 7 Invalid, 129 Unknown, 0 Unchecked, 0.78ms Time], IncrementalHoareTripleChecker [5 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 72.29ms Time] [2021-08-30 16:40:23,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:40:23,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-30 16:40:23,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-30 16:40:23,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 11 [2021-08-30 16:40:23,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:23,447 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-30 16:40:23,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,447 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-30 16:40:23,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-30 16:40:23,447 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:23,447 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:23,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-30 16:40:23,448 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:23,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:23,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1096893819, now seen corresponding path program 1 times [2021-08-30 16:40:23,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:23,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813899399] [2021-08-30 16:40:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:23,448 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:23,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:23,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813899399] [2021-08-30 16:40:23,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813899399] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:23,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:23,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:40:23,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814687541] [2021-08-30 16:40:23,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-30 16:40:23,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:23,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-30 16:40:23,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:23,508 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:23,613 INFO L93 Difference]: Finished difference Result 64 states and 70 transitions. [2021-08-30 16:40:23,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:40:23,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-30 16:40:23,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:23,614 INFO L225 Difference]: With dead ends: 64 [2021-08-30 16:40:23,614 INFO L226 Difference]: Without dead ends: 64 [2021-08-30 16:40:23,615 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.83ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-30 16:40:23,615 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 64 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.85ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.97ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 94.06ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:23,616 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 10 Invalid, 185 Unknown, 0 Unchecked, 0.97ms Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 94.06ms Time] [2021-08-30 16:40:23,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-30 16:40:23,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-08-30 16:40:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 38 states have (on average 1.631578947368421) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2021-08-30 16:40:23,619 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 11 [2021-08-30 16:40:23,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:23,619 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2021-08-30 16:40:23,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,619 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2021-08-30 16:40:23,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:40:23,619 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:23,620 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:23,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-30 16:40:23,620 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:23,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:23,620 INFO L82 PathProgramCache]: Analyzing trace with hash -1271599478, now seen corresponding path program 1 times [2021-08-30 16:40:23,620 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:23,620 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748080732] [2021-08-30 16:40:23,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:23,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:23,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-30 16:40:23,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:23,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748080732] [2021-08-30 16:40:23,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748080732] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:23,673 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:23,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-30 16:40:23,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937686651] [2021-08-30 16:40:23,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-30 16:40:23,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:23,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-30 16:40:23,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-30 16:40:23,674 INFO L87 Difference]: Start difference. First operand 59 states and 65 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:23,764 INFO L93 Difference]: Finished difference Result 60 states and 66 transitions. [2021-08-30 16:40:23,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:40:23,764 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 16:40:23,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:23,765 INFO L225 Difference]: With dead ends: 60 [2021-08-30 16:40:23,765 INFO L226 Difference]: Without dead ends: 60 [2021-08-30 16:40:23,765 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.48ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:23,765 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 59 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.64ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 77.01ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:23,766 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 7 Invalid, 123 Unknown, 0 Unchecked, 0.64ms Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 77.01ms Time] [2021-08-30 16:40:23,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-30 16:40:23,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-30 16:40:23,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.6153846153846154) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2021-08-30 16:40:23,768 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 15 [2021-08-30 16:40:23,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:23,769 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2021-08-30 16:40:23,769 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, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:23,769 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2021-08-30 16:40:23,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:40:23,769 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:23,769 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:23,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-30 16:40:23,769 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2080946104, now seen corresponding path program 1 times [2021-08-30 16:40:23,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:23,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706916315] [2021-08-30 16:40:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:23,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:23,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:23,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:23,821 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:23,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706916315] [2021-08-30 16:40:23,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706916315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:23,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715138221] [2021-08-30 16:40:23,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:23,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:23,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:23,824 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) [2021-08-30 16:40:23,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-30 16:40:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:23,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-30 16:40:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:24,075 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-08-30 16:40:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715138221] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:24,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-30 16:40:24,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 8 [2021-08-30 16:40:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888416348] [2021-08-30 16:40:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:40:24,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:40:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:40:24,076 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:24,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:24,176 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-08-30 16:40:24,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-30 16:40:24,176 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-08-30 16:40:24,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:24,177 INFO L225 Difference]: With dead ends: 109 [2021-08-30 16:40:24,177 INFO L226 Difference]: Without dead ends: 109 [2021-08-30 16:40:24,177 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 22.60ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-30 16:40:24,180 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 145 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 72.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.21ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 91.87ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:24,180 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 6 Invalid, 127 Unknown, 0 Unchecked, 1.21ms Time], IncrementalHoareTripleChecker [2 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 91.87ms Time] [2021-08-30 16:40:24,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-30 16:40:24,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 66. [2021-08-30 16:40:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 45 states have (on average 1.5333333333333334) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2021-08-30 16:40:24,203 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 15 [2021-08-30 16:40:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:24,203 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2021-08-30 16:40:24,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2021-08-30 16:40:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:40:24,204 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:24,204 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:24,240 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:24,423 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 [2021-08-30 16:40:24,423 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:24,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:24,427 INFO L82 PathProgramCache]: Analyzing trace with hash -591541108, now seen corresponding path program 1 times [2021-08-30 16:40:24,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:24,427 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577500418] [2021-08-30 16:40:24,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:24,427 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:24,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:24,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:24,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577500418] [2021-08-30 16:40:24,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577500418] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:24,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893330321] [2021-08-30 16:40:24,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:24,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:24,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:24,513 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) [2021-08-30 16:40:24,536 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-30 16:40:24,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:24,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-30 16:40:24,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:24,675 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 12 treesize of output 11 [2021-08-30 16:40:24,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:24,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:24,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893330321] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:24,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:24,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2021-08-30 16:40:24,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980899274] [2021-08-30 16:40:24,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-30 16:40:24,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:24,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-30 16:40:24,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-08-30 16:40:24,845 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-08-30 16:40:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:25,294 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2021-08-30 16:40:25,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-30 16:40:25,295 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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 [2021-08-30 16:40:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:25,295 INFO L225 Difference]: With dead ends: 123 [2021-08-30 16:40:25,295 INFO L226 Difference]: Without dead ends: 123 [2021-08-30 16:40:25,295 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 124.96ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-30 16:40:25,296 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 119 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 310.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.43ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 388.59ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:25,296 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 22 Invalid, 861 Unknown, 0 Unchecked, 2.43ms Time], IncrementalHoareTripleChecker [14 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 388.59ms Time] [2021-08-30 16:40:25,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-08-30 16:40:25,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 71. [2021-08-30 16:40:25,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 50 states have (on average 1.48) internal successors, (74), 67 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 77 transitions. [2021-08-30 16:40:25,299 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 77 transitions. Word has length 15 [2021-08-30 16:40:25,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:25,299 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 77 transitions. [2021-08-30 16:40:25,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 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) [2021-08-30 16:40:25,299 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 77 transitions. [2021-08-30 16:40:25,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-30 16:40:25,300 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:25,300 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:25,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:25,508 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 [2021-08-30 16:40:25,509 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:25,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:25,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1400887734, now seen corresponding path program 1 times [2021-08-30 16:40:25,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:25,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018717788] [2021-08-30 16:40:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:25,510 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:25,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:25,567 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:25,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018717788] [2021-08-30 16:40:25,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018717788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:25,567 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499625035] [2021-08-30 16:40:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:25,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:25,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:25,568 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) [2021-08-30 16:40:25,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-30 16:40:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-08-30 16:40:25,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:25,663 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 8 treesize of output 7 [2021-08-30 16:40:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:25,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:25,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:25,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499625035] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:25,858 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:25,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2021-08-30 16:40:25,859 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321941482] [2021-08-30 16:40:25,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 16:40:25,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:25,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 16:40:25,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:40:25,860 INFO L87 Difference]: Start difference. First operand 71 states and 77 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-30 16:40:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:26,024 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2021-08-30 16:40:26,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-30 16:40:26,025 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 [2021-08-30 16:40:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:26,025 INFO L225 Difference]: With dead ends: 74 [2021-08-30 16:40:26,026 INFO L226 Difference]: Without dead ends: 74 [2021-08-30 16:40:26,026 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 97.34ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-30 16:40:26,026 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 159 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 106.19ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.66ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.84ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:26,026 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 13 Invalid, 307 Unknown, 0 Unchecked, 1.66ms Time], IncrementalHoareTripleChecker [6 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 128.84ms Time] [2021-08-30 16:40:26,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-30 16:40:26,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 69. [2021-08-30 16:40:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 49 states have (on average 1.469387755102041) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:26,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-08-30 16:40:26,029 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 15 [2021-08-30 16:40:26,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:26,029 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-08-30 16:40:26,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-30 16:40:26,029 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-08-30 16:40:26,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:40:26,030 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:26,030 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:26,048 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:26,230 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 [2021-08-30 16:40:26,230 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:26,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:26,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502603, now seen corresponding path program 1 times [2021-08-30 16:40:26,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:26,231 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089986686] [2021-08-30 16:40:26,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:26,231 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:26,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:26,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-30 16:40:26,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:26,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089986686] [2021-08-30 16:40:26,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089986686] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-30 16:40:26,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-30 16:40:26,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-30 16:40:26,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928576281] [2021-08-30 16:40:26,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-30 16:40:26,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:26,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-30 16:40:26,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-30 16:40:26,262 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:26,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:26,337 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-08-30 16:40:26,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-30 16:40:26,338 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-30 16:40:26,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:26,338 INFO L225 Difference]: With dead ends: 80 [2021-08-30 16:40:26,338 INFO L226 Difference]: Without dead ends: 80 [2021-08-30 16:40:26,339 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 11.27ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-08-30 16:40:26,339 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 72 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.54ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 67.35ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:26,340 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 7 Invalid, 176 Unknown, 0 Unchecked, 0.54ms Time], IncrementalHoareTripleChecker [5 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 67.35ms Time] [2021-08-30 16:40:26,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-30 16:40:26,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2021-08-30 16:40:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 50 states have (on average 1.46) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2021-08-30 16:40:26,342 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 17 [2021-08-30 16:40:26,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:26,342 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2021-08-30 16:40:26,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:26,343 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2021-08-30 16:40:26,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-30 16:40:26,343 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:26,343 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:26,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-30 16:40:26,343 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr3REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:26,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:26,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1665502644, now seen corresponding path program 1 times [2021-08-30 16:40:26,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:26,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238316054] [2021-08-30 16:40:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:26,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:26,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-30 16:40:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:26,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-30 16:40:26,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238316054] [2021-08-30 16:40:26,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238316054] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-30 16:40:26,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58693024] [2021-08-30 16:40:26,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:26,393 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:26,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-30 16:40:26,397 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) [2021-08-30 16:40:26,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-30 16:40:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-30 16:40:26,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-30 16:40:26,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-30 16:40:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-30 16:40:26,590 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 27 treesize of output 23 [2021-08-30 16:40:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-30 16:40:26,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58693024] provided 0 perfect and 2 imperfect interpolant sequences [2021-08-30 16:40:26,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-08-30 16:40:26,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2021-08-30 16:40:26,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422773621] [2021-08-30 16:40:26,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-30 16:40:26,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-30 16:40:26,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-30 16:40:26,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-30 16:40:26,624 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-30 16:40:26,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-30 16:40:26,802 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-08-30 16:40:26,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-30 16:40:26,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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 17 [2021-08-30 16:40:26,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-30 16:40:26,803 INFO L225 Difference]: With dead ends: 79 [2021-08-30 16:40:26,803 INFO L226 Difference]: Without dead ends: 79 [2021-08-30 16:40:26,804 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 84.31ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-08-30 16:40:26,804 INFO L928 BasicCegarLoop]: 3 mSDtfsCounter, 138 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 111.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.39ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 134.57ms IncrementalHoareTripleChecker+Time [2021-08-30 16:40:26,804 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 19 Invalid, 324 Unknown, 0 Unchecked, 2.39ms Time], IncrementalHoareTripleChecker [14 Valid, 310 Invalid, 0 Unknown, 0 Unchecked, 134.57ms Time] [2021-08-30 16:40:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-08-30 16:40:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2021-08-30 16:40:26,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 51 states have (on average 1.411764705882353) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-30 16:40:26,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2021-08-30 16:40:26,806 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 17 [2021-08-30 16:40:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-30 16:40:26,806 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2021-08-30 16:40:26,807 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 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) [2021-08-30 16:40:26,807 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2021-08-30 16:40:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-30 16:40:26,807 INFO L505 BasicCegarLoop]: Found error trace [2021-08-30 16:40:26,807 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-30 16:40:26,831 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-30 16:40:27,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-30 16:40:27,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 18 more)] === [2021-08-30 16:40:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-30 16:40:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash 94437838, now seen corresponding path program 1 times [2021-08-30 16:40:27,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-30 16:40:27,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274956940] [2021-08-30 16:40:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-30 16:40:27,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-30 16:40:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:40:27,029 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-30 16:40:27,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-30 16:40:27,047 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-30 16:40:27,052 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-30 16:40:27,053 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr9REQUIRES_VIOLATION (22 of 23 remaining) [2021-08-30 16:40:27,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION (21 of 23 remaining) [2021-08-30 16:40:27,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION (20 of 23 remaining) [2021-08-30 16:40:27,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION (19 of 23 remaining) [2021-08-30 16:40:27,054 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION (18 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION (17 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION (16 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION (15 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION (14 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION (13 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION (12 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION (11 of 23 remaining) [2021-08-30 16:40:27,055 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION (10 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION (9 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION (8 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION (7 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION (6 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION (5 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION (4 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION (3 of 23 remaining) [2021-08-30 16:40:27,056 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION (2 of 23 remaining) [2021-08-30 16:40:27,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION (1 of 23 remaining) [2021-08-30 16:40:27,057 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22ENSURES_VIOLATIONMEMORY_LEAK (0 of 23 remaining) [2021-08-30 16:40:27,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-30 16:40:27,061 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-30 16:40:27,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 04:40:27 BoogieIcfgContainer [2021-08-30 16:40:27,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-30 16:40:27,079 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-30 16:40:27,079 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-30 16:40:27,080 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-30 16:40:27,080 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 04:40:22" (3/4) ... [2021-08-30 16:40:27,081 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-30 16:40:27,112 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-30 16:40:27,113 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-30 16:40:27,113 INFO L158 Benchmark]: Toolchain (without parser) took 5238.67ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 28.8MB in the beginning and 35.9MB in the end (delta: -7.1MB). Peak memory consumption was 16.9MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,113 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 34.0MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-30 16:40:27,113 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.14ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 40.9MB in the end (delta: -12.3MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,113 INFO L158 Benchmark]: Boogie Preprocessor took 55.14ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 38.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,113 INFO L158 Benchmark]: RCFGBuilder took 336.12ms. Allocated memory is still 62.9MB. Free memory was 38.6MB in the beginning and 35.1MB in the end (delta: 3.5MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,114 INFO L158 Benchmark]: TraceAbstraction took 4470.02ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.6MB in the beginning and 37.9MB in the end (delta: -3.3MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,114 INFO L158 Benchmark]: Witness Printer took 33.62ms. Allocated memory is still 75.5MB. Free memory was 37.9MB in the beginning and 35.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-30 16:40:27,115 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 34.0MB in the beginning and 34.0MB in the end (delta: 39.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.14ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 28.6MB in the beginning and 40.9MB in the end (delta: -12.3MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.14ms. Allocated memory is still 62.9MB. Free memory was 40.9MB in the beginning and 38.6MB in the end (delta: 2.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 336.12ms. Allocated memory is still 62.9MB. Free memory was 38.6MB in the beginning and 35.1MB in the end (delta: 3.5MB). Peak memory consumption was 12.5MB. Max. memory is 16.1GB. * TraceAbstraction took 4470.02ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.6MB in the beginning and 37.9MB in the end (delta: -3.3MB). Peak memory consumption was 8.9MB. Max. memory is 16.1GB. * Witness Printer took 33.62ms. Allocated memory is still 75.5MB. Free memory was 37.9MB in the beginning and 35.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 529]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int i, j, tmp; [L516] int length = __VERIFIER_nondet_int(); [L517] COND TRUE length < 1 [L517] length = 1 VAL [length=1] [L518] COND FALSE !(length % 2 == 0) VAL [length=1] [L519] int *arr = __builtin_alloca (length*sizeof(int)); [L521] int i = 0; VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=0, length=1] [L521] COND TRUE i < length [L523] arr[i] = __VERIFIER_nondet_int() VAL [__builtin_alloca (length*sizeof(int))={2:0}, __VERIFIER_nondet_int()=-1, arr={2:0}, i=0, length=1] [L521] i++ VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L521] COND FALSE !(i < length) VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, length=1] [L526] i=0 VAL [__builtin_alloca (length*sizeof(int))={2:0}, arr={2:0}, i=1, i=0, length=1] [L526] COND TRUE i