./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memcleanup.prp --file ../sv-benchmarks/c/forester-heap/sll-optional-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (memcleanup) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/forester-heap/sll-optional-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-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-memcleanup) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4817866b64d47a0885045d682a213ce065b00b0f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-memcleanup) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 04:26:18,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 04:26:18,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 04:26:18,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 04:26:18,376 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 04:26:18,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 04:26:18,381 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 04:26:18,383 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 04:26:18,386 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 04:26:18,387 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 04:26:18,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 04:26:18,391 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 04:26:18,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 04:26:18,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 04:26:18,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 04:26:18,395 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 04:26:18,401 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 04:26:18,404 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 04:26:18,405 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 04:26:18,408 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 04:26:18,410 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 04:26:18,411 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 04:26:18,412 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 04:26:18,412 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 04:26:18,414 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 04:26:18,416 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 04:26:18,416 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 04:26:18,417 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 04:26:18,418 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 04:26:18,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 04:26:18,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 04:26:18,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 04:26:18,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 04:26:18,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 04:26:18,421 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 04:26:18,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 04:26:18,422 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 04:26:18,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 04:26:18,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 04:26:18,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 04:26:18,424 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 04:26:18,426 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-MemCleanup-32bit-Automizer_Default.epf [2021-08-27 04:26:18,445 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 04:26:18,445 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 04:26:18,445 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 04:26:18,445 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 04:26:18,446 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 04:26:18,446 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 04:26:18,446 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 04:26:18,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 04:26:18,447 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 04:26:18,448 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 04:26:18,448 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 04:26:18,448 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 04:26:18,448 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 04:26:18,454 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 04:26:18,454 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 04:26:18,454 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 04:26:18,454 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 04:26:18,455 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:26:18,455 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 04:26:18,455 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 04:26:18,455 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 04:26:18,456 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 04:26:18,456 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 04:26:18,456 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-memcleanup) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4817866b64d47a0885045d682a213ce065b00b0f [2021-08-27 04:26:18,688 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 04:26:18,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 04:26:18,706 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 04:26:18,707 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 04:26:18,708 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 04:26:18,709 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-optional-2.i [2021-08-27 04:26:18,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89f8f00e/6a495a067a0f4c5c8cee421abd53802c/FLAGd356b5e33 [2021-08-27 04:26:19,171 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 04:26:19,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-optional-2.i [2021-08-27 04:26:19,183 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89f8f00e/6a495a067a0f4c5c8cee421abd53802c/FLAGd356b5e33 [2021-08-27 04:26:19,195 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f89f8f00e/6a495a067a0f4c5c8cee421abd53802c [2021-08-27 04:26:19,198 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 04:26:19,199 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 04:26:19,202 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 04:26:19,202 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 04:26:19,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 04:26:19,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,206 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b05b5ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19, skipping insertion in model container [2021-08-27 04:26:19,206 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 04:26:19,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 04:26:19,477 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-optional-2.i[22641,22654] [2021-08-27 04:26:19,487 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:26:19,494 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 04:26:19,523 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-optional-2.i[22641,22654] [2021-08-27 04:26:19,527 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 04:26:19,547 INFO L208 MainTranslator]: Completed translation [2021-08-27 04:26:19,548 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19 WrapperNode [2021-08-27 04:26:19,548 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 04:26:19,549 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 04:26:19,550 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 04:26:19,550 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 04:26:19,557 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,557 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,581 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,581 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 04:26:19,608 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 04:26:19,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 04:26:19,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 04:26:19,609 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (1/1) ... [2021-08-27 04:26:19,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 04:26:19,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 04:26:19,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-27 04:26:19,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-27 04:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 04:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 04:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 04:26:19,654 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 04:26:19,655 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 04:26:19,656 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 04:26:19,657 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 04:26:19,658 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 04:26:19,659 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 04:26:19,660 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 04:26:19,661 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 04:26:19,662 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 04:26:19,663 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 04:26:19,664 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 04:26:19,665 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 04:26:19,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 04:26:19,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 04:26:19,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 04:26:20,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 04:26:20,221 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-08-27 04:26:20,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:20 BoogieIcfgContainer [2021-08-27 04:26:20,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 04:26:20,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 04:26:20,227 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 04:26:20,230 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 04:26:20,231 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 04:26:19" (1/3) ... [2021-08-27 04:26:20,231 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0686a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:26:20, skipping insertion in model container [2021-08-27 04:26:20,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 04:26:19" (2/3) ... [2021-08-27 04:26:20,232 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d0686a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 04:26:20, skipping insertion in model container [2021-08-27 04:26:20,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:20" (3/3) ... [2021-08-27 04:26:20,234 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-2.i [2021-08-27 04:26:20,238 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 04:26:20,239 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 60 error locations. [2021-08-27 04:26:20,274 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 04:26:20,280 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-27 04:26:20,280 INFO L340 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2021-08-27 04:26:20,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 133 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 128 states have internal predecessors, (143), 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) [2021-08-27 04:26:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 04:26:20,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:20,299 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:20,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:20,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:20,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1129373335, now seen corresponding path program 1 times [2021-08-27 04:26:20,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:20,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517936870] [2021-08-27 04:26:20,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:20,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:20,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:20,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:20,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:20,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:20,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517936870] [2021-08-27 04:26:20,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517936870] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:20,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:20,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:20,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493954094] [2021-08-27 04:26:20,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:20,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:20,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:20,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:20,453 INFO L87 Difference]: Start difference. First operand has 133 states, 68 states have (on average 2.1029411764705883) internal successors, (143), 128 states have internal predecessors, (143), 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 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-27 04:26:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:20,646 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2021-08-27 04:26:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:20,647 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-27 04:26:20,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:20,653 INFO L225 Difference]: With dead ends: 134 [2021-08-27 04:26:20,653 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 04:26:20,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:20,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 04:26:20,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 124. [2021-08-27 04:26:20,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 120 states have internal predecessors, (131), 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) [2021-08-27 04:26:20,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2021-08-27 04:26:20,678 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 7 [2021-08-27 04:26:20,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:20,679 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2021-08-27 04:26:20,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-27 04:26:20,679 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2021-08-27 04:26:20,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-27 04:26:20,679 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:20,680 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:20,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 04:26:20,680 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:20,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:20,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1129373336, now seen corresponding path program 1 times [2021-08-27 04:26:20,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:20,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66428661] [2021-08-27 04:26:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:20,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:20,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:20,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:20,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66428661] [2021-08-27 04:26:20,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66428661] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:20,732 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:20,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-27 04:26:20,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505574212] [2021-08-27 04:26:20,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 04:26:20,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:20,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 04:26:20,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:20,734 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-27 04:26:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:20,892 INFO L93 Difference]: Finished difference Result 120 states and 130 transitions. [2021-08-27 04:26:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 04:26:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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 7 [2021-08-27 04:26:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:20,894 INFO L225 Difference]: With dead ends: 120 [2021-08-27 04:26:20,895 INFO L226 Difference]: Without dead ends: 120 [2021-08-27 04:26:20,895 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 04:26:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-27 04:26:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2021-08-27 04:26:20,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 70 states have (on average 1.7571428571428571) internal successors, (123), 112 states have internal predecessors, (123), 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) [2021-08-27 04:26:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2021-08-27 04:26:20,917 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 7 [2021-08-27 04:26:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:20,918 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2021-08-27 04:26:20,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 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) [2021-08-27 04:26:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2021-08-27 04:26:20,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:26:20,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:20,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:20,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 04:26:20,919 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:20,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:20,919 INFO L82 PathProgramCache]: Analyzing trace with hash -559610461, now seen corresponding path program 1 times [2021-08-27 04:26:20,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:20,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209529135] [2021-08-27 04:26:20,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:20,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:21,028 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:21,028 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209529135] [2021-08-27 04:26:21,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209529135] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:21,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:21,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:26:21,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580649653] [2021-08-27 04:26:21,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:26:21,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:21,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:26:21,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:21,032 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-08-27 04:26:21,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:21,257 INFO L93 Difference]: Finished difference Result 145 states and 158 transitions. [2021-08-27 04:26:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:26:21,260 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 [2021-08-27 04:26:21,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:21,261 INFO L225 Difference]: With dead ends: 145 [2021-08-27 04:26:21,261 INFO L226 Difference]: Without dead ends: 145 [2021-08-27 04:26:21,262 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:26:21,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-27 04:26:21,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 115. [2021-08-27 04:26:21,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.7428571428571429) internal successors, (122), 111 states have internal predecessors, (122), 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) [2021-08-27 04:26:21,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2021-08-27 04:26:21,272 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 15 [2021-08-27 04:26:21,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:21,273 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2021-08-27 04:26:21,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-08-27 04:26:21,273 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2021-08-27 04:26:21,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-27 04:26:21,273 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:21,274 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:21,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 04:26:21,274 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:21,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:21,274 INFO L82 PathProgramCache]: Analyzing trace with hash -559610460, now seen corresponding path program 1 times [2021-08-27 04:26:21,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:21,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981905351] [2021-08-27 04:26:21,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:21,275 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:21,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:21,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981905351] [2021-08-27 04:26:21,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981905351] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:21,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:21,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:26:21,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100515559] [2021-08-27 04:26:21,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 04:26:21,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:21,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 04:26:21,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:21,355 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-08-27 04:26:21,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:21,552 INFO L93 Difference]: Finished difference Result 114 states and 124 transitions. [2021-08-27 04:26:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 04:26:21,552 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 [2021-08-27 04:26:21,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:21,553 INFO L225 Difference]: With dead ends: 114 [2021-08-27 04:26:21,553 INFO L226 Difference]: Without dead ends: 114 [2021-08-27 04:26:21,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.3ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:26:21,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-08-27 04:26:21,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2021-08-27 04:26:21,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 70 states have (on average 1.7285714285714286) internal successors, (121), 110 states have internal predecessors, (121), 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) [2021-08-27 04:26:21,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2021-08-27 04:26:21,556 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 15 [2021-08-27 04:26:21,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:21,556 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2021-08-27 04:26:21,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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) [2021-08-27 04:26:21,556 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2021-08-27 04:26:21,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:26:21,557 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:21,557 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:21,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 04:26:21,557 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash -417241276, now seen corresponding path program 1 times [2021-08-27 04:26:21,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:21,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717823776] [2021-08-27 04:26:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:21,558 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:21,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:21,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:21,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717823776] [2021-08-27 04:26:21,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717823776] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:21,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:21,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 04:26:21,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715752499] [2021-08-27 04:26:21,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:26:21,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:21,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:26:21,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:26:21,627 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-08-27 04:26:21,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:21,821 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-08-27 04:26:21,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:26:21,821 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 16 [2021-08-27 04:26:21,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:21,822 INFO L225 Difference]: With dead ends: 118 [2021-08-27 04:26:21,822 INFO L226 Difference]: Without dead ends: 118 [2021-08-27 04:26:21,822 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 04:26:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-27 04:26:21,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2021-08-27 04:26:21,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 76 states have (on average 1.5921052631578947) internal successors, (121), 105 states have internal predecessors, (121), 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) [2021-08-27 04:26:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2021-08-27 04:26:21,825 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 16 [2021-08-27 04:26:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:21,826 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2021-08-27 04:26:21,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2021-08-27 04:26:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2021-08-27 04:26:21,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-27 04:26:21,826 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:21,826 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:21,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 04:26:21,827 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:21,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:21,827 INFO L82 PathProgramCache]: Analyzing trace with hash -417241275, now seen corresponding path program 1 times [2021-08-27 04:26:21,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:21,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551800214] [2021-08-27 04:26:21,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:21,828 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:21,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:21,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:21,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:21,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551800214] [2021-08-27 04:26:21,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551800214] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:21,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:21,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:21,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055914392] [2021-08-27 04:26:21,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:21,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:21,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:21,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:21,915 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-08-27 04:26:22,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:22,118 INFO L93 Difference]: Finished difference Result 130 states and 144 transitions. [2021-08-27 04:26:22,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-27 04:26:22,118 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 16 [2021-08-27 04:26:22,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:22,119 INFO L225 Difference]: With dead ends: 130 [2021-08-27 04:26:22,119 INFO L226 Difference]: Without dead ends: 130 [2021-08-27 04:26:22,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-27 04:26:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-08-27 04:26:22,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 121. [2021-08-27 04:26:22,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 88 states have (on average 1.5227272727272727) internal successors, (134), 117 states have internal predecessors, (134), 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) [2021-08-27 04:26:22,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-08-27 04:26:22,122 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 16 [2021-08-27 04:26:22,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:22,122 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-08-27 04:26:22,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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) [2021-08-27 04:26:22,122 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-08-27 04:26:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:26:22,123 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:22,123 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:22,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 04:26:22,123 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:22,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:22,124 INFO L82 PathProgramCache]: Analyzing trace with hash 501551750, now seen corresponding path program 1 times [2021-08-27 04:26:22,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:22,124 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129935757] [2021-08-27 04:26:22,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:22,124 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:22,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:22,184 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:22,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129935757] [2021-08-27 04:26:22,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129935757] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:22,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:22,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:22,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765592236] [2021-08-27 04:26:22,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:22,185 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:22,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:22,185 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:26:22,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:22,430 INFO L93 Difference]: Finished difference Result 121 states and 137 transitions. [2021-08-27 04:26:22,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 04:26:22,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 20 [2021-08-27 04:26:22,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:22,431 INFO L225 Difference]: With dead ends: 121 [2021-08-27 04:26:22,431 INFO L226 Difference]: Without dead ends: 121 [2021-08-27 04:26:22,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-27 04:26:22,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-27 04:26:22,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2021-08-27 04:26:22,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 88 states have (on average 1.5113636363636365) internal successors, (133), 116 states have internal predecessors, (133), 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) [2021-08-27 04:26:22,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 136 transitions. [2021-08-27 04:26:22,434 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 136 transitions. Word has length 20 [2021-08-27 04:26:22,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:22,435 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 136 transitions. [2021-08-27 04:26:22,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:26:22,435 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 136 transitions. [2021-08-27 04:26:22,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 04:26:22,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:22,435 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:22,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 04:26:22,436 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 501551751, now seen corresponding path program 1 times [2021-08-27 04:26:22,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:22,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266487939] [2021-08-27 04:26:22,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:22,437 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:22,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:22,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266487939] [2021-08-27 04:26:22,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266487939] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:22,508 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:22,508 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 04:26:22,508 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018444693] [2021-08-27 04:26:22,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 04:26:22,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:22,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 04:26:22,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 04:26:22,509 INFO L87 Difference]: Start difference. First operand 120 states and 136 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:26:22,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:22,764 INFO L93 Difference]: Finished difference Result 112 states and 128 transitions. [2021-08-27 04:26:22,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 04:26:22,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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 20 [2021-08-27 04:26:22,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:22,765 INFO L225 Difference]: With dead ends: 112 [2021-08-27 04:26:22,765 INFO L226 Difference]: Without dead ends: 112 [2021-08-27 04:26:22,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-27 04:26:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-08-27 04:26:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 105. [2021-08-27 04:26:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.4096385542168675) internal successors, (117), 101 states have internal predecessors, (117), 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) [2021-08-27 04:26:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 120 transitions. [2021-08-27 04:26:22,767 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 120 transitions. Word has length 20 [2021-08-27 04:26:22,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:22,767 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 120 transitions. [2021-08-27 04:26:22,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 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) [2021-08-27 04:26:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 120 transitions. [2021-08-27 04:26:22,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 04:26:22,768 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:22,768 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:22,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 04:26:22,769 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr59ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:22,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:22,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1833764694, now seen corresponding path program 1 times [2021-08-27 04:26:22,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:22,769 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580026100] [2021-08-27 04:26:22,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:22,770 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 04:26:22,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 04:26:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 04:26:22,840 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 04:26:22,840 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580026100] [2021-08-27 04:26:22,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580026100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 04:26:22,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 04:26:22,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-27 04:26:22,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165232682] [2021-08-27 04:26:22,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 04:26:22,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 04:26:22,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 04:26:22,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:26:22,842 INFO L87 Difference]: Start difference. First operand 105 states and 120 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-27 04:26:22,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 04:26:22,962 INFO L93 Difference]: Finished difference Result 137 states and 153 transitions. [2021-08-27 04:26:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 04:26:22,962 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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 21 [2021-08-27 04:26:22,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 04:26:22,963 INFO L225 Difference]: With dead ends: 137 [2021-08-27 04:26:22,963 INFO L226 Difference]: Without dead ends: 137 [2021-08-27 04:26:22,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-27 04:26:22,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-08-27 04:26:22,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2021-08-27 04:26:22,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 83 states have (on average 1.3855421686746987) internal successors, (115), 101 states have internal predecessors, (115), 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) [2021-08-27 04:26:22,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2021-08-27 04:26:22,965 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 21 [2021-08-27 04:26:22,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 04:26:22,966 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2021-08-27 04:26:22,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 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) [2021-08-27 04:26:22,966 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2021-08-27 04:26:22,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 04:26:22,967 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 04:26:22,967 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 04:26:22,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 04:26:22,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr44ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 55 more)] === [2021-08-27 04:26:22,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 04:26:22,967 INFO L82 PathProgramCache]: Analyzing trace with hash -989375032, now seen corresponding path program 1 times [2021-08-27 04:26:22,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 04:26:22,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196453888] [2021-08-27 04:26:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 04:26:22,968 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 04:26:22,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:26:22,976 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 04:26:22,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 04:26:22,997 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 04:26:22,998 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 04:26:22,998 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr44ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 04:26:22,999 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 04:26:23,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 04:26:23,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 04:26:23,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 04:26:23,002 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 04:26:23,003 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 04:26:23,004 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 04:26:23,005 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 04:26:23,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 04:26:23,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24REQUIRES_VIOLATION [2021-08-27 04:26:23,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr25REQUIRES_VIOLATION [2021-08-27 04:26:23,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr26REQUIRES_VIOLATION [2021-08-27 04:26:23,006 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr27REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr28REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr29REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr30REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr31REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr32REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr33REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr34REQUIRES_VIOLATION [2021-08-27 04:26:23,007 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr35REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr36REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr37REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr38REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr39REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr40REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr41REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr42REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr43REQUIRES_VIOLATION [2021-08-27 04:26:23,008 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr45REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr46REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr47REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr48REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr49REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr50REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr51REQUIRES_VIOLATION [2021-08-27 04:26:23,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr52REQUIRES_VIOLATION [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr53ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr54ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr55ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr56ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr57ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr58ASSERT_VIOLATIONMEMORY_FREE [2021-08-27 04:26:23,010 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr59ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 04:26:23,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 04:26:23,015 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 04:26:23,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 04:26:23 BoogieIcfgContainer [2021-08-27 04:26:23,029 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 04:26:23,029 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 04:26:23,030 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 04:26:23,030 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 04:26:23,030 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 04:26:20" (3/4) ... [2021-08-27 04:26:23,031 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-27 04:26:23,051 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-27 04:26:23,051 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 04:26:23,052 INFO L168 Benchmark]: Toolchain (without parser) took 3852.72 ms. Allocated memory was 52.4 MB in the beginning and 136.3 MB in the end (delta: 83.9 MB). Free memory was 27.9 MB in the beginning and 58.1 MB in the end (delta: -30.2 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,053 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.4 MB in the beginning and 34.4 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 04:26:23,053 INFO L168 Benchmark]: CACSL2BoogieTranslator took 346.77 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 27.8 MB in the beginning and 38.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,053 INFO L168 Benchmark]: Boogie Preprocessor took 59.08 ms. Allocated memory is still 62.9 MB. Free memory was 38.8 MB in the beginning and 36.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,053 INFO L168 Benchmark]: RCFGBuilder took 615.22 ms. Allocated memory is still 62.9 MB. Free memory was 36.0 MB in the beginning and 29.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,053 INFO L168 Benchmark]: TraceAbstraction took 2802.90 ms. Allocated memory was 62.9 MB in the beginning and 136.3 MB in the end (delta: 73.4 MB). Free memory was 29.2 MB in the beginning and 60.2 MB in the end (delta: -31.1 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,054 INFO L168 Benchmark]: Witness Printer took 22.04 ms. Allocated memory is still 136.3 MB. Free memory was 60.2 MB in the beginning and 58.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 04:26:23,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 52.4 MB. Free memory was 34.4 MB in the beginning and 34.4 MB in the end (delta: 71.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 346.77 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 27.8 MB in the beginning and 38.8 MB in the end (delta: -11.0 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.08 ms. Allocated memory is still 62.9 MB. Free memory was 38.8 MB in the beginning and 36.0 MB in the end (delta: 2.8 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 615.22 ms. Allocated memory is still 62.9 MB. Free memory was 36.0 MB in the beginning and 29.8 MB in the end (delta: 6.2 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2802.90 ms. Allocated memory was 62.9 MB in the beginning and 136.3 MB in the end (delta: 73.4 MB). Free memory was 29.2 MB in the beginning and 60.2 MB in the end (delta: -31.1 MB). Peak memory consumption was 41.2 MB. Max. memory is 16.1 GB. * Witness Printer took 22.04 ms. Allocated memory is still 136.3 MB. Free memory was 60.2 MB in the beginning and 58.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1007]: not all allocated memory was freed not all allocated memory was freed We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = ((void*)0) VAL [head={-1:0}] [L998] COND FALSE !(__VERIFIER_nondet_int()) [L998] COND TRUE __VERIFIER_nondet_int() [L998] head->data = 1 VAL [head={-1:0}] [L998] head->opt = head VAL [head={-1:0}] [L999] SLL* x = head; VAL [head={-1:0}, x={-1:0}] [L1001] COND FALSE !(__VERIFIER_nondet_int()) [L1004] x = head VAL [head={-1:0}, x={-1:0}] [L1005] COND TRUE x != ((void*)0) VAL [head={-1:0}, x={-1:0}] [L1007] EXPR x->data VAL [head={-1:0}, x={-1:0}, x->data=1] [L1007] EXPR x->data == 2 && x->opt == x VAL [head={-1:0}, x={-1:0}, x->data=1, x->data == 2 && x->opt == x=0] [L1007] COND TRUE !(x->data == 2 && x->opt == x) [L1007] reach_error() VAL [head={-1:0}, x={-1:0}] - UnprovableResult [Line: 997]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 997]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 998]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1001]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1007]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1008]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1008]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1016]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1017]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1018]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 1019]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 993]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 136 locations, 60 error locations. Started 1 CEGAR loops. OverallTime: 2740.8ms, OverallIterations: 10, TraceHistogramMax: 1, EmptinessCheckTime: 11.1ms, AutomataDifference: 1828.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 688 SDtfs, 701 SDslu, 984 SDs, 0 SdLazy, 2240 SolverSat, 112 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1199.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 331.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=133occurred in iteration=0, InterpolantAutomatonStates: 62, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 63.7ms AutomataMinimizationTime, 9 MinimizatonAttempts, 98 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 15.2ms SsaConstructionTime, 90.8ms SatisfiabilityAnalysisTime, 533.4ms InterpolantComputationTime, 159 NumberOfCodeBlocks, 159 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 128 ConstructedInterpolants, 0 QuantifiedInterpolants, 721 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-08-27 04:26:23,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...