./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/list-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 20ed64ec Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/list-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/list-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:50:12,411 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:12,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:12,451 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:12,452 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:12,455 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:12,465 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:12,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:12,472 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:12,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:12,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:12,481 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:12,481 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:12,483 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:12,484 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:12,487 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:12,488 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:12,488 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:12,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:12,494 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:12,498 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:12,499 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:12,499 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:12,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:12,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:12,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:12,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:12,505 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:12,505 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:12,506 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:12,506 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:12,507 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:12,509 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:12,510 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:12,511 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:12,511 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:12,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:12,512 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:12,512 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:12,513 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:12,513 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:12,514 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-08-27 06:50:12,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:12,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:12,541 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:12,541 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:12,543 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:12,543 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:12,544 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:12,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:12,544 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:12,544 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:12,545 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:12,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:12,546 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:12,546 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:12,546 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:12,546 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:12,546 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:12,547 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-27 06:50:12,547 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:12,548 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-08-27 06:50:12,800 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:12,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:12,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:12,821 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:12,821 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:12,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list-1.i [2021-08-27 06:50:12,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd3df755/a8e912ff329c418bba5a4003bfef2b80/FLAGec260e1ca [2021-08-27 06:50:13,298 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:13,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i [2021-08-27 06:50:13,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd3df755/a8e912ff329c418bba5a4003bfef2b80/FLAGec260e1ca [2021-08-27 06:50:13,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ecd3df755/a8e912ff329c418bba5a4003bfef2b80 [2021-08-27 06:50:13,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:13,328 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:13,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:13,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:13,332 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:13,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,333 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13caaa64 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13, skipping insertion in model container [2021-08-27 06:50:13,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:13,358 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:13,600 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-27 06:50:13,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:13,607 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:13,630 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-27 06:50:13,631 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:13,654 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:13,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13 WrapperNode [2021-08-27 06:50:13,655 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:13,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:13,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:13,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:13,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,663 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,672 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,672 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,687 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,692 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:13,692 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:13,692 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:13,693 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:13,693 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (1/1) ... [2021-08-27 06:50:13,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:13,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:13,714 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 06:50:13,722 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 06:50:13,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:13,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:13,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:13,752 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:13,753 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:13,754 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:13,755 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:13,756 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:13,757 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:13,758 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:13,759 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:13,760 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:13,766 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:13,767 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:13,768 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:13,769 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:13,770 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:13,771 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:13,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-27 06:50:13,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:13,774 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:13,775 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-27 06:50:13,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:13,775 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-27 06:50:13,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:13,775 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:14,065 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:14,290 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:14,290 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 06:50:14,296 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:14 BoogieIcfgContainer [2021-08-27 06:50:14,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:14,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:14,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:14,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:14,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:13" (1/3) ... [2021-08-27 06:50:14,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ed6838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:14, skipping insertion in model container [2021-08-27 06:50:14,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:13" (2/3) ... [2021-08-27 06:50:14,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ed6838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:14, skipping insertion in model container [2021-08-27 06:50:14,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:14" (3/3) ... [2021-08-27 06:50:14,304 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-08-27 06:50:14,309 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:14,309 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-08-27 06:50:14,352 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:14,357 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 06:50:14,357 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-08-27 06:50:14,372 INFO L276 IsEmpty]: Start isEmpty. Operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:50:14,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:14,377 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:14,378 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:14,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:14,381 INFO L82 PathProgramCache]: Analyzing trace with hash 85898829, now seen corresponding path program 1 times [2021-08-27 06:50:14,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:14,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132868145] [2021-08-27 06:50:14,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:14,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:14,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:14,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:14,612 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 06:50:14,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:14,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132868145] [2021-08-27 06:50:14,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132868145] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:14,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:14,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:14,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118446623] [2021-08-27 06:50:14,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:14,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:14,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:14,634 INFO L87 Difference]: Start difference. First operand has 73 states, 39 states have (on average 1.9743589743589745) internal successors, (77), 67 states have internal predecessors, (77), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:14,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:14,858 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2021-08-27 06:50:14,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:14,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:50:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:14,863 INFO L225 Difference]: With dead ends: 80 [2021-08-27 06:50:14,864 INFO L226 Difference]: Without dead ends: 72 [2021-08-27 06:50:14,865 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.0ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:14,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-08-27 06:50:14,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-08-27 06:50:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:14,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2021-08-27 06:50:14,890 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 11 [2021-08-27 06:50:14,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:14,890 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2021-08-27 06:50:14,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:14,890 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2021-08-27 06:50:14,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-27 06:50:14,891 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:14,891 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:14,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-27 06:50:14,891 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:14,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:14,892 INFO L82 PathProgramCache]: Analyzing trace with hash 85898830, now seen corresponding path program 1 times [2021-08-27 06:50:14,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:14,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012630562] [2021-08-27 06:50:14,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:14,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:14,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:14,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:14,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:14,980 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 06:50:14,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:14,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012630562] [2021-08-27 06:50:14,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012630562] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:14,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:14,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-27 06:50:14,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271707556] [2021-08-27 06:50:14,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-27 06:50:14,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:14,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-27 06:50:14,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:14,982 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:15,126 INFO L93 Difference]: Finished difference Result 92 states and 99 transitions. [2021-08-27 06:50:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:15,127 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-08-27 06:50:15,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:15,128 INFO L225 Difference]: With dead ends: 92 [2021-08-27 06:50:15,128 INFO L226 Difference]: Without dead ends: 92 [2021-08-27 06:50:15,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:15,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-27 06:50:15,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2021-08-27 06:50:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 77 states have internal predecessors, (86), 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 06:50:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 89 transitions. [2021-08-27 06:50:15,134 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 89 transitions. Word has length 11 [2021-08-27 06:50:15,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:15,134 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 89 transitions. [2021-08-27 06:50:15,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:15,134 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 89 transitions. [2021-08-27 06:50:15,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:15,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:15,135 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:15,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-27 06:50:15,136 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:15,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:15,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1250386406, now seen corresponding path program 1 times [2021-08-27 06:50:15,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:15,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737599394] [2021-08-27 06:50:15,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:15,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:15,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:15,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737599394] [2021-08-27 06:50:15,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737599394] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:15,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:15,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 06:50:15,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809617013] [2021-08-27 06:50:15,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:15,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:15,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:15,215 INFO L87 Difference]: Start difference. First operand 81 states and 89 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:15,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:15,416 INFO L93 Difference]: Finished difference Result 120 states and 127 transitions. [2021-08-27 06:50:15,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:15,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:15,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:15,420 INFO L225 Difference]: With dead ends: 120 [2021-08-27 06:50:15,420 INFO L226 Difference]: Without dead ends: 120 [2021-08-27 06:50:15,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:15,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-08-27 06:50:15,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 84. [2021-08-27 06:50:15,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 62 states have (on average 1.435483870967742) internal successors, (89), 80 states have internal predecessors, (89), 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 06:50:15,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2021-08-27 06:50:15,431 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 19 [2021-08-27 06:50:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:15,431 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2021-08-27 06:50:15,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:15,432 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2021-08-27 06:50:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:15,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:15,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:15,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-27 06:50:15,432 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:15,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:15,433 INFO L82 PathProgramCache]: Analyzing trace with hash 13452608, now seen corresponding path program 1 times [2021-08-27 06:50:15,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:15,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952983547] [2021-08-27 06:50:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:15,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:15,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:15,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952983547] [2021-08-27 06:50:15,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952983547] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:15,522 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:15,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:15,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949587775] [2021-08-27 06:50:15,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:15,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:15,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:15,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:15,523 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:15,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:15,763 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2021-08-27 06:50:15,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:15,764 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:15,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:15,764 INFO L225 Difference]: With dead ends: 109 [2021-08-27 06:50:15,765 INFO L226 Difference]: Without dead ends: 109 [2021-08-27 06:50:15,765 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-27 06:50:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 87. [2021-08-27 06:50:15,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 66 states have (on average 1.4393939393939394) internal successors, (95), 83 states have internal predecessors, (95), 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 06:50:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-08-27 06:50:15,775 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-08-27 06:50:15,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:15,775 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-08-27 06:50:15,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:15,775 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-08-27 06:50:15,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:15,776 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:15,776 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:15,776 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-27 06:50:15,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:15,776 INFO L82 PathProgramCache]: Analyzing trace with hash 13452609, now seen corresponding path program 1 times [2021-08-27 06:50:15,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:15,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968248707] [2021-08-27 06:50:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:15,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:15,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:15,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:15,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968248707] [2021-08-27 06:50:15,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968248707] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:15,866 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:15,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:15,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625708769] [2021-08-27 06:50:15,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:15,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:15,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:15,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:15,867 INFO L87 Difference]: Start difference. First operand 87 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:16,135 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2021-08-27 06:50:16,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:50:16,136 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 19 [2021-08-27 06:50:16,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:16,137 INFO L225 Difference]: With dead ends: 110 [2021-08-27 06:50:16,137 INFO L226 Difference]: Without dead ends: 110 [2021-08-27 06:50:16,137 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:50:16,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-08-27 06:50:16,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 78. [2021-08-27 06:50:16,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 60 states have (on average 1.4) internal successors, (84), 74 states have internal predecessors, (84), 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 06:50:16,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 87 transitions. [2021-08-27 06:50:16,145 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 87 transitions. Word has length 19 [2021-08-27 06:50:16,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:16,145 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 87 transitions. [2021-08-27 06:50:16,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 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 06:50:16,145 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 87 transitions. [2021-08-27 06:50:16,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:16,146 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:16,146 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 06:50:16,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-27 06:50:16,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:16,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:16,147 INFO L82 PathProgramCache]: Analyzing trace with hash 921876220, now seen corresponding path program 1 times [2021-08-27 06:50:16,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:16,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718594733] [2021-08-27 06:50:16,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:16,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,212 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 06:50:16,213 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:16,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718594733] [2021-08-27 06:50:16,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718594733] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:16,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:16,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 06:50:16,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110749924] [2021-08-27 06:50:16,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:16,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:16,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:16,214 INFO L87 Difference]: Start difference. First operand 78 states and 87 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:16,374 INFO L93 Difference]: Finished difference Result 122 states and 130 transitions. [2021-08-27 06:50:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:16,375 INFO L225 Difference]: With dead ends: 122 [2021-08-27 06:50:16,375 INFO L226 Difference]: Without dead ends: 122 [2021-08-27 06:50:16,376 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:16,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-08-27 06:50:16,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2021-08-27 06:50:16,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.390625) internal successors, (89), 78 states have internal predecessors, (89), 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 06:50:16,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2021-08-27 06:50:16,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 21 [2021-08-27 06:50:16,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:16,379 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2021-08-27 06:50:16,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,379 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2021-08-27 06:50:16,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:16,380 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:16,380 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 06:50:16,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-27 06:50:16,380 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:16,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:16,381 INFO L82 PathProgramCache]: Analyzing trace with hash 921928775, now seen corresponding path program 1 times [2021-08-27 06:50:16,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:16,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397462679] [2021-08-27 06:50:16,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:16,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:16,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:16,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397462679] [2021-08-27 06:50:16,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397462679] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:16,445 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:16,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-27 06:50:16,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632084787] [2021-08-27 06:50:16,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:16,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:16,446 INFO L87 Difference]: Start difference. First operand 82 states and 92 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:16,626 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2021-08-27 06:50:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:16,627 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:16,627 INFO L225 Difference]: With dead ends: 105 [2021-08-27 06:50:16,627 INFO L226 Difference]: Without dead ends: 105 [2021-08-27 06:50:16,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-27 06:50:16,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 82. [2021-08-27 06:50:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.375) internal successors, (88), 78 states have internal predecessors, (88), 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 06:50:16,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2021-08-27 06:50:16,638 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 21 [2021-08-27 06:50:16,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:16,638 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2021-08-27 06:50:16,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 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 06:50:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2021-08-27 06:50:16,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:16,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:16,639 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:16,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-27 06:50:16,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:16,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:16,640 INFO L82 PathProgramCache]: Analyzing trace with hash 626114546, now seen corresponding path program 1 times [2021-08-27 06:50:16,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:16,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635221396] [2021-08-27 06:50:16,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:16,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:16,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:16,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:16,705 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635221396] [2021-08-27 06:50:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635221396] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:16,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:16,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:16,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012477249] [2021-08-27 06:50:16,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:16,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:16,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:16,706 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:16,861 INFO L93 Difference]: Finished difference Result 88 states and 95 transitions. [2021-08-27 06:50:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-27 06:50:16,862 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:16,862 INFO L225 Difference]: With dead ends: 88 [2021-08-27 06:50:16,862 INFO L226 Difference]: Without dead ends: 88 [2021-08-27 06:50:16,863 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-08-27 06:50:16,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-08-27 06:50:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 64 states have (on average 1.34375) internal successors, (86), 76 states have internal predecessors, (86), 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 06:50:16,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-08-27 06:50:16,865 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 21 [2021-08-27 06:50:16,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:16,865 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-08-27 06:50:16,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:16,865 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-08-27 06:50:16,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-27 06:50:16,866 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:16,866 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:16,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-27 06:50:16,866 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:16,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:16,867 INFO L82 PathProgramCache]: Analyzing trace with hash 626114547, now seen corresponding path program 1 times [2021-08-27 06:50:16,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:16,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792409522] [2021-08-27 06:50:16,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:16,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:16,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-08-27 06:50:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:16,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:16,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-27 06:50:16,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792409522] [2021-08-27 06:50:16,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792409522] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:16,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:16,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-27 06:50:16,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608922519] [2021-08-27 06:50:16,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-27 06:50:16,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-27 06:50:16,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-27 06:50:16,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-27 06:50:16,955 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:17,131 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-08-27 06:50:17,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-27 06:50:17,132 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:17,132 INFO L225 Difference]: With dead ends: 85 [2021-08-27 06:50:17,132 INFO L226 Difference]: Without dead ends: 85 [2021-08-27 06:50:17,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 81.3ms TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-08-27 06:50:17,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-27 06:50:17,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 68. [2021-08-27 06:50:17,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 56 states have (on average 1.3035714285714286) internal successors, (73), 64 states have internal predecessors, (73), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:17,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2021-08-27 06:50:17,135 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 21 [2021-08-27 06:50:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:17,135 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2021-08-27 06:50:17,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.0) internal successors, (18), 6 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 06:50:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2021-08-27 06:50:17,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-27 06:50:17,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:17,135 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 06:50:17,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-27 06:50:17,136 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1486603147, now seen corresponding path program 1 times [2021-08-27 06:50:17,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-27 06:50:17,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098433359] [2021-08-27 06:50:17,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:17,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-27 06:50:17,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:17,144 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:17,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:17,187 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-27 06:50:17,192 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:17,193 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:17,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:17,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:17,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:17,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 06:50:17,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 06:50:17,197 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 06:50:17,197 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 06:50:17,199 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 06:50:17,200 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 06:50:17,200 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:17,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-27 06:50:17,204 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:17,214 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:17,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:17 BoogieIcfgContainer [2021-08-27 06:50:17,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:17,224 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:17,225 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:17,225 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:17,225 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:14" (3/4) ... [2021-08-27 06:50:17,227 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:17,227 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:17,228 INFO L168 Benchmark]: Toolchain (without parser) took 3899.30 ms. Allocated memory was 54.5 MB in the beginning and 121.6 MB in the end (delta: 67.1 MB). Free memory was 30.6 MB in the beginning and 95.3 MB in the end (delta: -64.7 MB). Peak memory consumption was 3.0 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:17,228 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:17,228 INFO L168 Benchmark]: CACSL2BoogieTranslator took 326.90 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 44.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:17,228 INFO L168 Benchmark]: Boogie Preprocessor took 35.07 ms. Allocated memory is still 67.1 MB. Free memory was 43.9 MB in the beginning and 41.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:17,228 INFO L168 Benchmark]: RCFGBuilder took 604.38 ms. Allocated memory is still 67.1 MB. Free memory was 41.2 MB in the beginning and 40.7 MB in the end (delta: 570.5 kB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:17,229 INFO L168 Benchmark]: TraceAbstraction took 2925.86 ms. Allocated memory was 67.1 MB in the beginning and 121.6 MB in the end (delta: 54.5 MB). Free memory was 40.0 MB in the beginning and 95.3 MB in the end (delta: -55.3 MB). Peak memory consumption was 58.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:17,229 INFO L168 Benchmark]: Witness Printer took 2.39 ms. Allocated memory is still 121.6 MB. Free memory is still 95.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:17,229 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 54.5 MB. Free memory was 36.9 MB in the beginning and 36.8 MB in the end (delta: 37.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 326.90 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.4 MB in the beginning and 44.1 MB in the end (delta: -13.7 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.07 ms. Allocated memory is still 67.1 MB. Free memory was 43.9 MB in the beginning and 41.2 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 604.38 ms. Allocated memory is still 67.1 MB. Free memory was 41.2 MB in the beginning and 40.7 MB in the end (delta: 570.5 kB). Peak memory consumption was 18.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2925.86 ms. Allocated memory was 67.1 MB in the beginning and 121.6 MB in the end (delta: 54.5 MB). Free memory was 40.0 MB in the beginning and 95.3 MB in the end (delta: -55.3 MB). Peak memory consumption was 58.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.39 ms. Allocated memory is still 121.6 MB. Free memory is still 95.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={-1:0}, p={-1:0}] [L551] p = a VAL [a={-1:0}, p={-1:0}] [L552] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={-1:0}, p={-1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: 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 10 procedures, 92 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 2852.2ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 11.6ms, AutomataDifference: 1789.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 395 SDtfs, 696 SDslu, 939 SDs, 0 SdLazy, 1788 SolverSat, 119 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1024.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 518.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=4, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 65.2ms AutomataMinimizationTime, 9 MinimizatonAttempts, 194 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.7ms SsaConstructionTime, 118.7ms SatisfiabilityAnalysisTime, 636.4ms InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 154 ConstructedInterpolants, 0 QuantifiedInterpolants, 802 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 12/12 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 06:50:17,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-20ed64e [2021-08-27 06:50:18,824 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-27 06:50:18,826 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-27 06:50:18,856 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-27 06:50:18,857 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-27 06:50:18,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-27 06:50:18,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-27 06:50:18,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-27 06:50:18,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-27 06:50:18,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-27 06:50:18,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-27 06:50:18,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-27 06:50:18,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-27 06:50:18,874 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-27 06:50:18,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-27 06:50:18,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-27 06:50:18,879 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-27 06:50:18,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-27 06:50:18,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-27 06:50:18,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-27 06:50:18,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-27 06:50:18,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-27 06:50:18,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-27 06:50:18,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-27 06:50:18,898 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-27 06:50:18,898 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-27 06:50:18,898 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-27 06:50:18,900 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-27 06:50:18,900 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-27 06:50:18,901 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-27 06:50:18,901 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-27 06:50:18,901 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-27 06:50:18,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-27 06:50:18,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-27 06:50:18,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-27 06:50:18,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-27 06:50:18,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-27 06:50:18,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-27 06:50:18,905 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-27 06:50:18,906 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-27 06:50:18,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-27 06:50:18,910 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-08-27 06:50:18,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-27 06:50:18,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-27 06:50:18,938 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-27 06:50:18,938 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-27 06:50:18,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-27 06:50:18,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-27 06:50:18,940 INFO L138 SettingsManager]: * Use SBE=true [2021-08-27 06:50:18,940 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-27 06:50:18,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-27 06:50:18,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-08-27 06:50:18,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-08-27 06:50:18,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-27 06:50:18,949 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-08-27 06:50:18,949 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-27 06:50:18,949 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-27 06:50:18,949 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-27 06:50:18,949 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-27 06:50:18,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-27 06:50:18,950 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-27 06:50:18,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-27 06:50:18,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:18,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-27 06:50:18,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-27 06:50:18,950 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-27 06:50:18,951 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-27 06:50:18,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-27 06:50:18,951 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-27 06:50:18,951 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2021-08-27 06:50:19,233 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-27 06:50:19,252 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-27 06:50:19,253 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-27 06:50:19,254 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-27 06:50:19,255 INFO L275 PluginConnector]: CDTParser initialized [2021-08-27 06:50:19,255 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list-1.i [2021-08-27 06:50:19,300 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901d0ebd9/6423aa769e4940e28cd7d994444fd17d/FLAG870f642b3 [2021-08-27 06:50:19,692 INFO L306 CDTParser]: Found 1 translation units. [2021-08-27 06:50:19,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i [2021-08-27 06:50:19,705 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901d0ebd9/6423aa769e4940e28cd7d994444fd17d/FLAG870f642b3 [2021-08-27 06:50:20,062 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/901d0ebd9/6423aa769e4940e28cd7d994444fd17d [2021-08-27 06:50:20,065 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-27 06:50:20,066 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-08-27 06:50:20,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:20,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-27 06:50:20,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-27 06:50:20,072 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28034e60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20, skipping insertion in model container [2021-08-27 06:50:20,073 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,078 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-27 06:50:20,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-27 06:50:20,357 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-27 06:50:20,363 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:20,376 INFO L203 MainTranslator]: Completed pre-run [2021-08-27 06:50:20,410 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2021-08-27 06:50:20,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-27 06:50:20,444 INFO L208 MainTranslator]: Completed translation [2021-08-27 06:50:20,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20 WrapperNode [2021-08-27 06:50:20,445 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-27 06:50:20,446 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-27 06:50:20,446 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-27 06:50:20,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-27 06:50:20,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,483 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,488 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,491 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-27 06:50:20,496 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-27 06:50:20,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-27 06:50:20,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-27 06:50:20,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (1/1) ... [2021-08-27 06:50:20,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-27 06:50:20,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-27 06:50:20,525 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 06:50:20,551 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 06:50:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-08-27 06:50:20,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-27 06:50:20,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:20,570 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-08-27 06:50:20,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-08-27 06:50:20,570 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-08-27 06:50:20,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-08-27 06:50:20,572 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-08-27 06:50:20,573 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-08-27 06:50:20,573 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-08-27 06:50:20,573 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-08-27 06:50:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-08-27 06:50:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-08-27 06:50:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-08-27 06:50:20,573 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-08-27 06:50:20,574 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-08-27 06:50:20,575 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-08-27 06:50:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-08-27 06:50:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-08-27 06:50:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-08-27 06:50:20,576 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-08-27 06:50:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-08-27 06:50:20,581 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-08-27 06:50:20,582 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-08-27 06:50:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-08-27 06:50:20,583 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-08-27 06:50:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-08-27 06:50:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-08-27 06:50:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-08-27 06:50:20,584 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-08-27 06:50:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-08-27 06:50:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-08-27 06:50:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-08-27 06:50:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-08-27 06:50:20,585 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-08-27 06:50:20,586 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-08-27 06:50:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-08-27 06:50:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-08-27 06:50:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-08-27 06:50:20,587 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-08-27 06:50:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-08-27 06:50:20,588 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-08-27 06:50:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-08-27 06:50:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-08-27 06:50:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-08-27 06:50:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-08-27 06:50:20,589 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-08-27 06:50:20,590 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-08-27 06:50:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-08-27 06:50:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-08-27 06:50:20,591 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-08-27 06:50:20,592 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-08-27 06:50:20,593 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-08-27 06:50:20,594 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-08-27 06:50:20,595 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-08-27 06:50:20,596 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-08-27 06:50:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-08-27 06:50:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-08-27 06:50:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-08-27 06:50:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-08-27 06:50:20,597 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-08-27 06:50:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-08-27 06:50:20,598 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-08-27 06:50:20,599 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-08-27 06:50:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-08-27 06:50:20,600 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-08-27 06:50:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-08-27 06:50:20,601 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-08-27 06:50:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-08-27 06:50:20,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-08-27 06:50:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-08-27 06:50:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-27 06:50:20,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-27 06:50:20,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.setCurrentRoundingMode [2021-08-27 06:50:20,608 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-08-27 06:50:20,608 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-08-27 06:50:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-27 06:50:20,994 INFO L758 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-08-27 06:50:21,282 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-27 06:50:21,283 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-27 06:50:21,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:21 BoogieIcfgContainer [2021-08-27 06:50:21,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-27 06:50:21,286 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-27 06:50:21,286 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-27 06:50:21,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-27 06:50:21,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.08 06:50:20" (1/3) ... [2021-08-27 06:50:21,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd05f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:21, skipping insertion in model container [2021-08-27 06:50:21,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.08 06:50:20" (2/3) ... [2021-08-27 06:50:21,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fd05f2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.08 06:50:21, skipping insertion in model container [2021-08-27 06:50:21,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:21" (3/3) ... [2021-08-27 06:50:21,290 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2021-08-27 06:50:21,294 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-27 06:50:21,294 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 26 error locations. [2021-08-27 06:50:21,325 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-27 06:50:21,330 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 06:50:21,330 INFO L340 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2021-08-27 06:50:21,343 INFO L276 IsEmpty]: Start isEmpty. Operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-08-27 06:50:21,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:21,358 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:21,358 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:21,358 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:21,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:21,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1692035718, now seen corresponding path program 1 times [2021-08-27 06:50:21,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:21,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2116685041] [2021-08-27 06:50:21,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:21,369 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:21,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:21,371 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:21,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-27 06:50:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:21,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-27 06:50:21,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:21,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:21,689 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 06:50:21,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:21,739 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 06:50:21,740 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:21,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2116685041] [2021-08-27 06:50:21,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2116685041] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:21,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:21,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-08-27 06:50:21,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500840230] [2021-08-27 06:50:21,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-27 06:50:21,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:21,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-27 06:50:21,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-27 06:50:21,761 INFO L87 Difference]: Start difference. First operand has 71 states, 37 states have (on average 2.027027027027027) internal successors, (75), 65 states have internal predecessors, (75), 5 states have call successors, (5), 3 states have call predecessors, (5), 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 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:21,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:21,987 INFO L93 Difference]: Finished difference Result 76 states and 84 transitions. [2021-08-27 06:50:21,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-27 06:50:21,988 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:50:21,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:21,992 INFO L225 Difference]: With dead ends: 76 [2021-08-27 06:50:21,992 INFO L226 Difference]: Without dead ends: 68 [2021-08-27 06:50:21,993 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-27 06:50:22,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-27 06:50:22,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2021-08-27 06:50:22,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 59 states have internal predecessors, (70), 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 06:50:22,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2021-08-27 06:50:22,020 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 10 [2021-08-27 06:50:22,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:22,020 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2021-08-27 06:50:22,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:22,020 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2021-08-27 06:50:22,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-27 06:50:22,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:22,021 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:22,033 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:22,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:22,228 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:22,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:22,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1692035717, now seen corresponding path program 1 times [2021-08-27 06:50:22,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:22,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191381195] [2021-08-27 06:50:22,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:22,229 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:22,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:22,229 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:22,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-27 06:50:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:22,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:22,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:22,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:22,439 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 06:50:22,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:22,563 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 06:50:22,563 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:22,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191381195] [2021-08-27 06:50:22,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191381195] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:22,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:22,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-08-27 06:50:22,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136877481] [2021-08-27 06:50:22,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:22,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:22,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:22,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:22,565 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:22,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:22,869 INFO L93 Difference]: Finished difference Result 87 states and 93 transitions. [2021-08-27 06:50:22,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-27 06:50:22,871 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-08-27 06:50:22,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:22,872 INFO L225 Difference]: With dead ends: 87 [2021-08-27 06:50:22,872 INFO L226 Difference]: Without dead ends: 87 [2021-08-27 06:50:22,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 75.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:22,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-08-27 06:50:22,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 75. [2021-08-27 06:50:22,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 54 states have (on average 1.462962962962963) internal successors, (79), 71 states have internal predecessors, (79), 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 06:50:22,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 82 transitions. [2021-08-27 06:50:22,879 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 82 transitions. Word has length 10 [2021-08-27 06:50:22,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:22,879 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 82 transitions. [2021-08-27 06:50:22,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:22,879 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 82 transitions. [2021-08-27 06:50:22,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:22,879 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:22,879 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:22,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:23,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:23,088 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:23,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:23,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1869130219, now seen corresponding path program 1 times [2021-08-27 06:50:23,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:23,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574044520] [2021-08-27 06:50:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:23,089 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:23,090 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:23,090 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:23,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-27 06:50:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:50:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:23,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 06:50:23,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 06:50:23,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:23,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:23,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 06:50:23,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:23,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:23,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574044520] [2021-08-27 06:50:23,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574044520] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:23,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:23,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-08-27 06:50:23,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000029899] [2021-08-27 06:50:23,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:50:23,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:23,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:50:23,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:23,424 INFO L87 Difference]: Start difference. First operand 75 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:23,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:23,828 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2021-08-27 06:50:23,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-27 06:50:23,829 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 06:50:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:23,830 INFO L225 Difference]: With dead ends: 153 [2021-08-27 06:50:23,830 INFO L226 Difference]: Without dead ends: 153 [2021-08-27 06:50:23,830 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:50:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-27 06:50:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 81. [2021-08-27 06:50:23,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 60 states have (on average 1.4666666666666666) internal successors, (88), 77 states have internal predecessors, (88), 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 06:50:23,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-08-27 06:50:23,836 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 17 [2021-08-27 06:50:23,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:23,836 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-08-27 06:50:23,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:23,836 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-08-27 06:50:23,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:23,837 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:23,837 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:23,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:24,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:24,044 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:24,044 INFO L82 PathProgramCache]: Analyzing trace with hash 674842861, now seen corresponding path program 1 times [2021-08-27 06:50:24,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:24,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1879245682] [2021-08-27 06:50:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:24,045 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:24,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:24,046 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:24,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-08-27 06:50:24,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:24,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:24,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:24,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 06:50:24,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-27 06:50:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:24,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:24,411 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:24,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1879245682] [2021-08-27 06:50:24,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1879245682] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:24,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:24,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 06:50:24,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774074025] [2021-08-27 06:50:24,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:24,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:24,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:24,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:24,414 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:24,724 INFO L93 Difference]: Finished difference Result 105 states and 117 transitions. [2021-08-27 06:50:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 06:50:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:24,725 INFO L225 Difference]: With dead ends: 105 [2021-08-27 06:50:24,725 INFO L226 Difference]: Without dead ends: 105 [2021-08-27 06:50:24,725 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 75.6ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-08-27 06:50:24,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 83. [2021-08-27 06:50:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 63 states have (on average 1.4761904761904763) internal successors, (93), 79 states have internal predecessors, (93), 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 06:50:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 96 transitions. [2021-08-27 06:50:24,729 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 96 transitions. Word has length 17 [2021-08-27 06:50:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:24,729 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 96 transitions. [2021-08-27 06:50:24,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 6 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 96 transitions. [2021-08-27 06:50:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-27 06:50:24,729 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:24,730 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:24,738 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-08-27 06:50:24,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:24,938 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash 674842862, now seen corresponding path program 1 times [2021-08-27 06:50:24,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:24,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1406921385] [2021-08-27 06:50:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:24,939 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:24,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:24,940 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:24,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-08-27 06:50:25,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:25,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:50:25,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:25,179 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-27 06:50:25,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-27 06:50:25,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-08-27 06:50:25,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-08-27 06:50:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:25,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:25,492 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:25,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1406921385] [2021-08-27 06:50:25,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1406921385] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:25,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:25,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-27 06:50:25,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148210606] [2021-08-27 06:50:25,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:50:25,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:25,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:50:25,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:25,493 INFO L87 Difference]: Start difference. First operand 83 states and 96 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:26,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:26,357 INFO L93 Difference]: Finished difference Result 107 states and 119 transitions. [2021-08-27 06:50:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:50:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-08-27 06:50:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:26,359 INFO L225 Difference]: With dead ends: 107 [2021-08-27 06:50:26,359 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 06:50:26,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:50:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 06:50:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 79. [2021-08-27 06:50:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 62 states have (on average 1.403225806451613) internal successors, (87), 75 states have internal predecessors, (87), 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 06:50:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-08-27 06:50:26,364 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 17 [2021-08-27 06:50:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:26,364 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-08-27 06:50:26,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 10 states have internal predecessors, (21), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:26,364 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-08-27 06:50:26,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 06:50:26,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:26,365 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:26,372 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:26,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:26,572 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr13REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1426802311, now seen corresponding path program 1 times [2021-08-27 06:50:26,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:26,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [608166525] [2021-08-27 06:50:26,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:26,573 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:26,573 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:26,574 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:26,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-08-27 06:50:26,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:26,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-27 06:50:26,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:26,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:26,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-08-27 06:50:26,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-08-27 06:50:26,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 27 [2021-08-27 06:50:26,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-08-27 06:50:26,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:26,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:27,088 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:27,088 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:27,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [608166525] [2021-08-27 06:50:27,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [608166525] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:27,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:27,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2021-08-27 06:50:27,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004388238] [2021-08-27 06:50:27,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-27 06:50:27,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:27,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-27 06:50:27,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-27 06:50:27,089 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:27,731 INFO L93 Difference]: Finished difference Result 99 states and 110 transitions. [2021-08-27 06:50:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-27 06:50:27,731 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 06:50:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:27,732 INFO L225 Difference]: With dead ends: 99 [2021-08-27 06:50:27,732 INFO L226 Difference]: Without dead ends: 99 [2021-08-27 06:50:27,733 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 267.7ms TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-08-27 06:50:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-08-27 06:50:27,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 71. [2021-08-27 06:50:27,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 58 states have (on average 1.3448275862068966) internal successors, (78), 67 states have internal predecessors, (78), 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 06:50:27,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2021-08-27 06:50:27,736 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 18 [2021-08-27 06:50:27,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:27,736 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2021-08-27 06:50:27,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 10 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:27,736 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2021-08-27 06:50:27,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-27 06:50:27,737 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:27,737 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:27,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:27,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:27,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr12REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1426802312, now seen corresponding path program 1 times [2021-08-27 06:50:27,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:27,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1061915668] [2021-08-27 06:50:27,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:27,947 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:27,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:27,949 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:27,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-08-27 06:50:28,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:28,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-27 06:50:28,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:28,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-08-27 06:50:28,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 19 [2021-08-27 06:50:28,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-08-27 06:50:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:28,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:28,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:28,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1061915668] [2021-08-27 06:50:28,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1061915668] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:28,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:28,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-08-27 06:50:28,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686110285] [2021-08-27 06:50:28,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:28,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:28,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:28,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:28,257 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:28,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:28,510 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-08-27 06:50:28,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:28,511 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-08-27 06:50:28,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:28,512 INFO L225 Difference]: With dead ends: 91 [2021-08-27 06:50:28,512 INFO L226 Difference]: Without dead ends: 91 [2021-08-27 06:50:28,512 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:28,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-08-27 06:50:28,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 65. [2021-08-27 06:50:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 54 states have (on average 1.2962962962962963) internal successors, (70), 61 states have internal predecessors, (70), 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 06:50:28,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2021-08-27 06:50:28,515 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 18 [2021-08-27 06:50:28,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:28,515 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2021-08-27 06:50:28,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:28,515 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2021-08-27 06:50:28,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:28,515 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:28,515 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:28,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:28,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:28,721 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr24ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:28,722 INFO L82 PathProgramCache]: Analyzing trace with hash -985440585, now seen corresponding path program 1 times [2021-08-27 06:50:28,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:28,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [418757237] [2021-08-27 06:50:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:28,722 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:28,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:28,723 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:28,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-08-27 06:50:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:28,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:50:28,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:28,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 06:50:28,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 06:50:28,985 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 06:50:28,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:29,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2021-08-27 06:50:29,064 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 06:50:29,065 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:29,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [418757237] [2021-08-27 06:50:29,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [418757237] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:29,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:29,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-08-27 06:50:29,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310670327] [2021-08-27 06:50:29,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-27 06:50:29,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:29,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-27 06:50:29,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-27 06:50:29,066 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:29,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:29,290 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-08-27 06:50:29,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-27 06:50:29,291 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 06:50:29,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:29,291 INFO L225 Difference]: With dead ends: 107 [2021-08-27 06:50:29,291 INFO L226 Difference]: Without dead ends: 107 [2021-08-27 06:50:29,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.1ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-27 06:50:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-08-27 06:50:29,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 73. [2021-08-27 06:50:29,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 69 states have internal predecessors, (79), 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 06:50:29,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 82 transitions. [2021-08-27 06:50:29,294 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 82 transitions. Word has length 19 [2021-08-27 06:50:29,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:29,294 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 82 transitions. [2021-08-27 06:50:29,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:29,294 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 82 transitions. [2021-08-27 06:50:29,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-27 06:50:29,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:29,295 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-27 06:50:29,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:29,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:29,495 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:29,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:29,496 INFO L82 PathProgramCache]: Analyzing trace with hash -985388030, now seen corresponding path program 1 times [2021-08-27 06:50:29,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:29,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [671399119] [2021-08-27 06:50:29,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:29,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:29,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:29,497 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:29,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-08-27 06:50:29,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-27 06:50:29,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-27 06:50:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-27 06:50:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-08-27 06:50:29,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-08-27 06:50:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:29,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-27 06:50:29,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-08-27 06:50:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-27 06:50:29,854 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-27 06:50:29,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [671399119] [2021-08-27 06:50:29,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [671399119] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-27 06:50:29,854 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-27 06:50:29,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 9 [2021-08-27 06:50:29,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560548627] [2021-08-27 06:50:29,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-27 06:50:29,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-27 06:50:29,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-27 06:50:29,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-27 06:50:29,856 INFO L87 Difference]: Start difference. First operand 73 states and 82 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:30,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-27 06:50:30,230 INFO L93 Difference]: Finished difference Result 135 states and 144 transitions. [2021-08-27 06:50:30,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-27 06:50:30,231 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-08-27 06:50:30,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-27 06:50:30,231 INFO L225 Difference]: With dead ends: 135 [2021-08-27 06:50:30,231 INFO L226 Difference]: Without dead ends: 135 [2021-08-27 06:50:30,231 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-27 06:50:30,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-08-27 06:50:30,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2021-08-27 06:50:30,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 76 states have (on average 1.25) internal successors, (95), 83 states have internal predecessors, (95), 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 06:50:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 98 transitions. [2021-08-27 06:50:30,234 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 98 transitions. Word has length 19 [2021-08-27 06:50:30,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-27 06:50:30,234 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 98 transitions. [2021-08-27 06:50:30,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-27 06:50:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 98 transitions. [2021-08-27 06:50:30,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-27 06:50:30,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-27 06:50:30,235 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 06:50:30,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:30,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:30,442 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr25ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 21 more)] === [2021-08-27 06:50:30,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-27 06:50:30,442 INFO L82 PathProgramCache]: Analyzing trace with hash -483881938, now seen corresponding path program 1 times [2021-08-27 06:50:30,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-27 06:50:30,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827418674] [2021-08-27 06:50:30,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-27 06:50:30,443 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-27 06:50:30,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-27 06:50:30,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-08-27 06:50:30,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-08-27 06:50:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:30,653 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-27 06:50:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-27 06:50:30,694 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-27 06:50:30,694 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-27 06:50:30,695 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location mainErr25ENSURES_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr2REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr3REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr4REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr5REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr6REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr7REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr8REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr9REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr10REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr11REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr12REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr13REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr14REQUIRES_VIOLATION [2021-08-27 06:50:30,696 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr15REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr16REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr17REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr18REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr19REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr20REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr21REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr22REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr23REQUIRES_VIOLATION [2021-08-27 06:50:30,697 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr24ASSERT_VIOLATIONMEMORY_LEAK [2021-08-27 06:50:30,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-08-27 06:50:30,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-27 06:50:30,908 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-27 06:50:30,917 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) [2021-08-27 06:50:30,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.08 06:50:30 BoogieIcfgContainer [2021-08-27 06:50:30,935 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-27 06:50:30,935 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-27 06:50:30,935 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-27 06:50:30,935 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-27 06:50:30,936 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.08 06:50:21" (3/4) ... [2021-08-27 06:50:30,938 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-27 06:50:30,938 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-27 06:50:30,939 INFO L168 Benchmark]: Toolchain (without parser) took 10871.97 ms. Allocated memory was 52.4 MB in the beginning and 134.2 MB in the end (delta: 81.8 MB). Free memory was 28.4 MB in the beginning and 60.4 MB in the end (delta: -32.1 MB). Peak memory consumption was 50.4 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:30,939 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:30,939 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.52 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.3 MB in the beginning and 39.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:30,939 INFO L168 Benchmark]: Boogie Preprocessor took 49.46 ms. Allocated memory is still 62.9 MB. Free memory was 39.5 MB in the beginning and 36.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:30,939 INFO L168 Benchmark]: RCFGBuilder took 788.62 ms. Allocated memory is still 62.9 MB. Free memory was 36.5 MB in the beginning and 40.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:30,939 INFO L168 Benchmark]: TraceAbstraction took 9649.32 ms. Allocated memory was 62.9 MB in the beginning and 134.2 MB in the end (delta: 71.3 MB). Free memory was 40.6 MB in the beginning and 60.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 52.2 MB. Max. memory is 16.1 GB. [2021-08-27 06:50:30,940 INFO L168 Benchmark]: Witness Printer took 2.35 ms. Allocated memory is still 134.2 MB. Free memory is still 60.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-27 06:50:30,940 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 52.4 MB. Free memory was 34.2 MB in the beginning and 34.1 MB in the end (delta: 71.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 376.52 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 28.3 MB in the beginning and 39.7 MB in the end (delta: -11.4 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 49.46 ms. Allocated memory is still 62.9 MB. Free memory was 39.5 MB in the beginning and 36.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 788.62 ms. Allocated memory is still 62.9 MB. Free memory was 36.5 MB in the beginning and 40.9 MB in the end (delta: -4.3 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9649.32 ms. Allocated memory was 62.9 MB in the beginning and 134.2 MB in the end (delta: 71.3 MB). Free memory was 40.6 MB in the beginning and 60.4 MB in the end (delta: -19.9 MB). Peak memory consumption was 52.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.35 ms. Allocated memory is still 134.2 MB. Free memory is still 60.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification ensures #valid == old(#valid); is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={1:0}] [L534] List t; [L535] List p = a; VAL [a={1:0}, p={1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 VAL [a={1:0}, p={1:0}] [L551] p = a VAL [a={1:0}, p={1:0}] [L552] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h VAL [a={1:0}, p={1:0}, p->h=3] [L556] COND FALSE !(p->h != 3) [L558] return 0; VAL [\result=0, a={1:0}, p={1:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 552]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 553]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 554]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 555]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 556]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 557]: 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 11 procedures, 96 locations, 26 error locations. Started 1 CEGAR loops. OverallTime: 9583.4ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 21.1ms, AutomataDifference: 3638.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 383 SDtfs, 1033 SDslu, 1104 SDs, 0 SdLazy, 1407 SolverSat, 177 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2441.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1093.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=9, InterpolantAutomatonStates: 75, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 48.5ms AutomataMinimizationTime, 9 MinimizatonAttempts, 275 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 77.1ms SsaConstructionTime, 183.7ms SatisfiabilityAnalysisTime, 2080.7ms InterpolantComputationTime, 165 NumberOfCodeBlocks, 165 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 1240 SizeOfPredicates, 47 NumberOfNonLiveVariables, 753 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 18 InterpolantComputations, 18 PerfectInterpolantSequences, 16/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-08-27 06:50:30,972 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...