./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan --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 Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 276936ba1494f32a328b3de86f664a380d5263e9 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:40:14,283 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:40:14,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:40:14,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:40:14,417 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:40:14,419 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:40:14,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:40:14,425 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:40:14,442 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:40:14,450 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:40:14,452 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:40:14,456 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:40:14,457 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:40:14,462 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:40:14,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:40:14,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:40:14,470 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:40:14,471 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:40:14,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:40:14,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:40:14,488 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:40:14,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:40:14,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:40:14,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:40:14,504 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:40:14,505 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:40:14,506 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:40:14,516 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:40:14,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:40:14,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:40:14,519 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:40:14,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:40:14,523 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:40:14,525 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:40:14,527 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:40:14,528 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:40:14,529 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:40:14,529 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:40:14,529 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:40:14,531 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:40:14,532 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:40:14,538 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:40:14,595 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:40:14,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:40:14,597 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:40:14,597 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:40:14,598 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:40:14,598 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:40:14,598 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:40:14,599 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:40:14,599 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:40:14,599 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:40:14,601 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:40:14,601 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:40:14,602 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:40:14,602 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:40:14,602 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:40:14,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:40:14,604 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:40:14,604 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:40:14,604 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:40:14,605 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:40:14,605 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:40:14,605 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:40:14,606 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:40:14,606 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:40:14,606 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:40:14,607 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:40:14,609 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:40:14,609 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:40:14,609 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:40:14,610 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:40:14,610 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:40:14,611 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:40:14,611 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:40:14,611 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:40:14,612 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:40:14,612 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:40:14,612 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:40:14,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:40:14,613 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:40:14,613 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:40:14,618 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 276936ba1494f32a328b3de86f664a380d5263e9 [2020-11-30 01:40:15,040 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:40:15,098 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:40:15,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:40:15,106 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:40:15,107 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:40:15,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-30 01:40:15,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/data/c90ef6acc/5ca12cee5aa541119acff9df2a14085b/FLAG80e5c90e5 [2020-11-30 01:40:15,981 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:40:15,993 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2020-11-30 01:40:16,018 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/data/c90ef6acc/5ca12cee5aa541119acff9df2a14085b/FLAG80e5c90e5 [2020-11-30 01:40:16,207 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/data/c90ef6acc/5ca12cee5aa541119acff9df2a14085b [2020-11-30 01:40:16,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:40:16,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:40:16,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:40:16,221 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:40:16,226 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:40:16,227 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:16,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf8964d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16, skipping insertion in model container [2020-11-30 01:40:16,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:16,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:40:16,314 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:40:16,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:40:16,814 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:40:16,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:40:16,985 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:40:16,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16 WrapperNode [2020-11-30 01:40:16,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:40:16,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:40:16,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:40:16,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:40:16,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,061 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:40:17,062 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:40:17,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:40:17,063 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:40:17,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,078 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,090 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... [2020-11-30 01:40:17,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:40:17,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:40:17,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:40:17,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:40:17,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:40:17,193 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:40:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:40:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:40:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:40:17,194 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:40:17,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:40:17,993 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:40:17,993 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-30 01:40:17,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:40:17 BoogieIcfgContainer [2020-11-30 01:40:17,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:40:17,998 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:40:17,998 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:40:18,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:40:18,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:40:16" (1/3) ... [2020-11-30 01:40:18,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6596f532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:40:18, skipping insertion in model container [2020-11-30 01:40:18,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:40:16" (2/3) ... [2020-11-30 01:40:18,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6596f532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:40:18, skipping insertion in model container [2020-11-30 01:40:18,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:40:17" (3/3) ... [2020-11-30 01:40:18,028 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2020-11-30 01:40:18,043 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:40:18,049 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 11 error locations. [2020-11-30 01:40:18,064 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2020-11-30 01:40:18,103 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:40:18,103 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:40:18,103 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:40:18,104 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:40:18,104 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:40:18,104 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:40:18,104 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:40:18,105 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:40:18,125 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-11-30 01:40:18,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:40:18,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:18,137 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:40:18,137 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:18,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:18,145 INFO L82 PathProgramCache]: Analyzing trace with hash 113944, now seen corresponding path program 1 times [2020-11-30 01:40:18,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:18,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937047172] [2020-11-30 01:40:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:18,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937047172] [2020-11-30 01:40:18,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:18,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:40:18,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453174231] [2020-11-30 01:40:18,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:40:18,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:18,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:40:18,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:18,391 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-11-30 01:40:18,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:18,454 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2020-11-30 01:40:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:40:18,456 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:40:18,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:18,467 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:40:18,467 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 01:40:18,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:18,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 01:40:18,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-30 01:40:18,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-30 01:40:18,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2020-11-30 01:40:18,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 3 [2020-11-30 01:40:18,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:18,509 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2020-11-30 01:40:18,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:40:18,509 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2020-11-30 01:40:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:40:18,510 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:18,510 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:40:18,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:40:18,511 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:18,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:18,512 INFO L82 PathProgramCache]: Analyzing trace with hash 113945, now seen corresponding path program 1 times [2020-11-30 01:40:18,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:18,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793114695] [2020-11-30 01:40:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:18,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793114695] [2020-11-30 01:40:18,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:18,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:40:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983751952] [2020-11-30 01:40:18,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:40:18,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:18,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:40:18,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:40:18,647 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2020-11-30 01:40:18,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:18,798 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-11-30 01:40:18,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:40:18,799 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 01:40:18,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:18,801 INFO L225 Difference]: With dead ends: 36 [2020-11-30 01:40:18,801 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 01:40:18,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:40:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 01:40:18,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 21. [2020-11-30 01:40:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 01:40:18,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-30 01:40:18,808 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 3 [2020-11-30 01:40:18,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:18,808 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-30 01:40:18,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:40:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-30 01:40:18,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:40:18,811 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:18,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:40:18,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:40:18,812 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:18,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:18,813 INFO L82 PathProgramCache]: Analyzing trace with hash 115938, now seen corresponding path program 1 times [2020-11-30 01:40:18,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:18,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539811421] [2020-11-30 01:40:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:18,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:18,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539811421] [2020-11-30 01:40:18,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:18,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:40:18,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850903476] [2020-11-30 01:40:18,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:40:18,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:18,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:40:18,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:18,925 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 3 states. [2020-11-30 01:40:18,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:18,965 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2020-11-30 01:40:18,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:40:18,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:40:18,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:18,967 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:40:18,967 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:40:18,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:40:18,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-30 01:40:18,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-30 01:40:18,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-11-30 01:40:18,972 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 3 [2020-11-30 01:40:18,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:18,972 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-11-30 01:40:18,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:40:18,973 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-11-30 01:40:18,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:40:18,973 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:18,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:40:18,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 01:40:18,974 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:18,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:18,975 INFO L82 PathProgramCache]: Analyzing trace with hash 3595509, now seen corresponding path program 1 times [2020-11-30 01:40:18,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:18,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672566354] [2020-11-30 01:40:18,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:19,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:19,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:19,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672566354] [2020-11-30 01:40:19,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:19,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:40:19,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709011978] [2020-11-30 01:40:19,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:40:19,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:19,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:40:19,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:19,054 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 3 states. [2020-11-30 01:40:19,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:19,098 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-11-30 01:40:19,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:40:19,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 01:40:19,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:19,100 INFO L225 Difference]: With dead ends: 17 [2020-11-30 01:40:19,100 INFO L226 Difference]: Without dead ends: 17 [2020-11-30 01:40:19,100 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:19,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-11-30 01:40:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-11-30 01:40:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:40:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-30 01:40:19,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 4 [2020-11-30 01:40:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:19,104 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-30 01:40:19,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:40:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-30 01:40:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 01:40:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:19,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 01:40:19,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 01:40:19,106 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:19,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:19,107 INFO L82 PathProgramCache]: Analyzing trace with hash 3595510, now seen corresponding path program 1 times [2020-11-30 01:40:19,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:19,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657775545] [2020-11-30 01:40:19,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:19,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657775545] [2020-11-30 01:40:19,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:19,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:40:19,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404900201] [2020-11-30 01:40:19,325 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:40:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:19,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:40:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:40:19,326 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2020-11-30 01:40:19,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:19,539 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2020-11-30 01:40:19,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:40:19,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-30 01:40:19,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:19,541 INFO L225 Difference]: With dead ends: 25 [2020-11-30 01:40:19,541 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 01:40:19,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 01:40:19,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 01:40:19,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 17. [2020-11-30 01:40:19,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-11-30 01:40:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2020-11-30 01:40:19,547 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 4 [2020-11-30 01:40:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:19,548 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2020-11-30 01:40:19,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:40:19,548 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2020-11-30 01:40:19,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:40:19,550 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:19,550 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 01:40:19,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 01:40:19,552 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:19,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:19,553 INFO L82 PathProgramCache]: Analyzing trace with hash 109559352, now seen corresponding path program 1 times [2020-11-30 01:40:19,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:19,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633486047] [2020-11-30 01:40:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:19,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633486047] [2020-11-30 01:40:19,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674943353] [2020-11-30 01:40:19,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:40:19,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:19,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:40:19,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:40:19,868 INFO L384 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 [2020-11-30 01:40:19,869 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:40:19,880 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:40:19,881 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 01:40:19,881 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2020-11-30 01:40:19,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:19,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:40:20,062 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 01:40:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:20,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [761034836] [2020-11-30 01:40:20,166 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 01:40:20,166 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:40:20,174 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:40:20,182 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:40:20,183 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:40:20,895 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:40:21,082 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-11-30 01:40:21,439 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-30 01:40:21,589 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 30 [2020-11-30 01:40:21,592 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:40:21,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:40:21,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-11-30 01:40:21,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040559887] [2020-11-30 01:40:21,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:40:21,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:21,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:40:21,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:40:21,595 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 11 states. [2020-11-30 01:40:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:21,910 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-11-30 01:40:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:40:21,911 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 5 [2020-11-30 01:40:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:21,912 INFO L225 Difference]: With dead ends: 34 [2020-11-30 01:40:21,912 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 01:40:21,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:40:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 01:40:21,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 15. [2020-11-30 01:40:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:40:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2020-11-30 01:40:21,918 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 5 [2020-11-30 01:40:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2020-11-30 01:40:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:40:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2020-11-30 01:40:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:40:21,919 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:21,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:40:22,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-30 01:40:22,133 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:22,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:22,134 INFO L82 PathProgramCache]: Analyzing trace with hash -898564169, now seen corresponding path program 1 times [2020-11-30 01:40:22,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:22,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534110301] [2020-11-30 01:40:22,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:22,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:22,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534110301] [2020-11-30 01:40:22,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933262965] [2020-11-30 01:40:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:40:22,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:22,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 01:40:22,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:40:22,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:22,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:40:22,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:22,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [536135144] [2020-11-30 01:40:22,475 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 01:40:22,475 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:40:22,476 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:40:22,476 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:40:22,476 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:40:23,076 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:40:23,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:40:23,127 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:40:23,455 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-30 01:40:23,914 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-11-30 01:40:24,722 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 01:40:24,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:40:24,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3] total 11 [2020-11-30 01:40:24,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462461011] [2020-11-30 01:40:24,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:40:24,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:24,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:40:24,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-30 01:40:24,729 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 6 states. [2020-11-30 01:40:24,924 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 61 [2020-11-30 01:40:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:25,006 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2020-11-30 01:40:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:40:25,007 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-30 01:40:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:25,008 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:40:25,008 INFO L226 Difference]: Without dead ends: 20 [2020-11-30 01:40:25,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:40:25,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-30 01:40:25,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 13. [2020-11-30 01:40:25,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-11-30 01:40:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 15 transitions. [2020-11-30 01:40:25,011 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 15 transitions. Word has length 6 [2020-11-30 01:40:25,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:25,011 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 15 transitions. [2020-11-30 01:40:25,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:40:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 15 transitions. [2020-11-30 01:40:25,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:40:25,012 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:25,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:40:25,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-30 01:40:25,229 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:25,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:25,230 INFO L82 PathProgramCache]: Analyzing trace with hash -259165085, now seen corresponding path program 1 times [2020-11-30 01:40:25,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:25,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867974935] [2020-11-30 01:40:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:25,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:25,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:25,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867974935] [2020-11-30 01:40:25,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:25,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:40:25,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91600267] [2020-11-30 01:40:25,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:40:25,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:25,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:40:25,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:25,277 INFO L87 Difference]: Start difference. First operand 13 states and 15 transitions. Second operand 3 states. [2020-11-30 01:40:25,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:25,321 INFO L93 Difference]: Finished difference Result 14 states and 16 transitions. [2020-11-30 01:40:25,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:40:25,329 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-11-30 01:40:25,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:25,329 INFO L225 Difference]: With dead ends: 14 [2020-11-30 01:40:25,329 INFO L226 Difference]: Without dead ends: 14 [2020-11-30 01:40:25,329 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:40:25,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-11-30 01:40:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-11-30 01:40:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-11-30 01:40:25,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2020-11-30 01:40:25,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2020-11-30 01:40:25,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:25,332 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2020-11-30 01:40:25,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:40:25,333 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2020-11-30 01:40:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:40:25,333 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:25,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:40:25,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-11-30 01:40:25,334 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash 555663730, now seen corresponding path program 1 times [2020-11-30 01:40:25,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:25,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267953801] [2020-11-30 01:40:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:25,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:25,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267953801] [2020-11-30 01:40:25,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:25,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:40:25,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26517234] [2020-11-30 01:40:25,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:40:25,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:25,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:40:25,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:40:25,530 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand 6 states. [2020-11-30 01:40:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:25,692 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2020-11-30 01:40:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:40:25,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-11-30 01:40:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:25,694 INFO L225 Difference]: With dead ends: 23 [2020-11-30 01:40:25,694 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:40:25,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:40:25,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:40:25,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 18. [2020-11-30 01:40:25,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-11-30 01:40:25,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-11-30 01:40:25,698 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 8 [2020-11-30 01:40:25,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:25,698 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-11-30 01:40:25,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:40:25,698 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-11-30 01:40:25,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:40:25,699 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:25,699 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:40:25,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-11-30 01:40:25,700 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:25,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:25,700 INFO L82 PathProgramCache]: Analyzing trace with hash 555816562, now seen corresponding path program 1 times [2020-11-30 01:40:25,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:25,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779020271] [2020-11-30 01:40:25,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:25,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:25,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779020271] [2020-11-30 01:40:25,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:40:25,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:40:25,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656039312] [2020-11-30 01:40:25,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:40:25,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:25,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:40:25,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:40:25,768 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 4 states. [2020-11-30 01:40:25,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:25,791 INFO L93 Difference]: Finished difference Result 17 states and 20 transitions. [2020-11-30 01:40:25,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:40:25,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 01:40:25,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:25,792 INFO L225 Difference]: With dead ends: 17 [2020-11-30 01:40:25,792 INFO L226 Difference]: Without dead ends: 11 [2020-11-30 01:40:25,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:40:25,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-30 01:40:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-30 01:40:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-30 01:40:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2020-11-30 01:40:25,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2020-11-30 01:40:25,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:25,795 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2020-11-30 01:40:25,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:40:25,795 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2020-11-30 01:40:25,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 01:40:25,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:25,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:40:25,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-11-30 01:40:25,796 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 672635827, now seen corresponding path program 1 times [2020-11-30 01:40:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:25,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632479243] [2020-11-30 01:40:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:25,943 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:25,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632479243] [2020-11-30 01:40:25,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087206002] [2020-11-30 01:40:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:40:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:26,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 01:40:26,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:40:26,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:26,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:40:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:26,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1670998261] [2020-11-30 01:40:26,199 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:40:26,199 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:40:26,200 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:40:26,200 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:40:26,200 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:40:26,333 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:40:26,715 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:40:26,947 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-30 01:40:27,462 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-30 01:40:27,839 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-11-30 01:40:28,164 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-30 01:40:28,166 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:40:28,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:40:28,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2020-11-30 01:40:28,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415291661] [2020-11-30 01:40:28,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 01:40:28,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:28,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 01:40:28,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:40:28,168 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 12 states. [2020-11-30 01:40:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:28,469 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2020-11-30 01:40:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 01:40:28,470 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-11-30 01:40:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:28,470 INFO L225 Difference]: With dead ends: 19 [2020-11-30 01:40:28,470 INFO L226 Difference]: Without dead ends: 19 [2020-11-30 01:40:28,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:40:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-30 01:40:28,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 15. [2020-11-30 01:40:28,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-11-30 01:40:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-11-30 01:40:28,474 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 10 [2020-11-30 01:40:28,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:28,474 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-11-30 01:40:28,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 01:40:28,474 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-11-30 01:40:28,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:40:28,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:40:28,475 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:40:28,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-30 01:40:28,676 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 01:40:28,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:40:28,676 INFO L82 PathProgramCache]: Analyzing trace with hash -656942673, now seen corresponding path program 2 times [2020-11-30 01:40:28,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:40:28,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794868494] [2020-11-30 01:40:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:40:28,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:40:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:40:29,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794868494] [2020-11-30 01:40:29,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752721587] [2020-11-30 01:40:29,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:40:29,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 01:40:29,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 01:40:29,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 01:40:29,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:40:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:40:29,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:40:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:40:29,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772691126] [2020-11-30 01:40:29,956 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2020-11-30 01:40:29,956 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:40:29,956 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:40:29,957 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:40:29,957 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:40:30,448 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:40:30,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:40:30,931 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:40:31,178 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 50 [2020-11-30 01:40:31,436 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 61 [2020-11-30 01:40:31,882 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-11-30 01:40:32,073 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2020-11-30 01:40:32,358 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 65 [2020-11-30 01:40:32,806 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 72 [2020-11-30 01:40:32,808 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:40:32,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:40:32,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2020-11-30 01:40:32,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430859534] [2020-11-30 01:40:32,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 01:40:32,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:40:32,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 01:40:32,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2020-11-30 01:40:32,810 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 22 states. [2020-11-30 01:40:33,462 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2020-11-30 01:40:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:40:33,687 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-11-30 01:40:33,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-30 01:40:33,688 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 14 [2020-11-30 01:40:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:40:33,688 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:40:33,688 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 01:40:33,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 01:40:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 01:40:33,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 01:40:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 01:40:33,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 01:40:33,691 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2020-11-30 01:40:33,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:40:33,691 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 01:40:33,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 01:40:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 01:40:33,691 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 01:40:33,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-11-30 01:40:33,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:40:33 BoogieIcfgContainer [2020-11-30 01:40:33,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:40:33,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:40:33,898 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:40:33,898 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:40:33,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:40:17" (3/4) ... [2020-11-30 01:40:33,902 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 01:40:33,918 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2020-11-30 01:40:33,918 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-30 01:40:33,919 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2020-11-30 01:40:33,919 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 01:40:33,978 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_db5f2f71-a92f-41cc-b3c7-e5bda98065bf/bin/utaipan/witness.graphml [2020-11-30 01:40:33,978 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:40:33,979 INFO L168 Benchmark]: Toolchain (without parser) took 17763.74 ms. Allocated memory was 98.6 MB in the beginning and 237.0 MB in the end (delta: 138.4 MB). Free memory was 67.1 MB in the beginning and 135.2 MB in the end (delta: -68.1 MB). Peak memory consumption was 70.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,980 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 98.6 MB. Free memory was 57.1 MB in the beginning and 57.1 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:40:33,981 INFO L168 Benchmark]: CACSL2BoogieTranslator took 766.65 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,981 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.03 ms. Allocated memory is still 98.6 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,983 INFO L168 Benchmark]: Boogie Preprocessor took 33.30 ms. Allocated memory is still 98.6 MB. Free memory was 63.6 MB in the beginning and 62.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,983 INFO L168 Benchmark]: RCFGBuilder took 899.22 ms. Allocated memory is still 98.6 MB. Free memory was 62.3 MB in the beginning and 35.7 MB in the end (delta: 26.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,986 INFO L168 Benchmark]: TraceAbstraction took 15899.26 ms. Allocated memory was 98.6 MB in the beginning and 237.0 MB in the end (delta: 138.4 MB). Free memory was 35.4 MB in the beginning and 138.3 MB in the end (delta: -102.9 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,986 INFO L168 Benchmark]: Witness Printer took 80.47 ms. Allocated memory is still 237.0 MB. Free memory was 138.3 MB in the beginning and 135.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:40:33,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 98.6 MB. Free memory was 57.1 MB in the beginning and 57.1 MB in the end (delta: 63.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 766.65 ms. Allocated memory is still 98.6 MB. Free memory was 66.8 MB in the beginning and 65.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.03 ms. Allocated memory is still 98.6 MB. Free memory was 65.4 MB in the beginning and 63.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.30 ms. Allocated memory is still 98.6 MB. Free memory was 63.6 MB in the beginning and 62.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 899.22 ms. Allocated memory is still 98.6 MB. Free memory was 62.3 MB in the beginning and 35.7 MB in the end (delta: 26.5 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 15899.26 ms. Allocated memory was 98.6 MB in the beginning and 237.0 MB in the end (delta: 138.4 MB). Free memory was 35.4 MB in the beginning and 138.3 MB in the end (delta: -102.9 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * Witness Printer took 80.47 ms. Allocated memory is still 237.0 MB. Free memory was 138.3 MB in the beginning and 135.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 520]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 529]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 516]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 532]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 11 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 15.7s, OverallIterations: 12, TraceHistogramMax: 2, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 102 SDtfs, 317 SDslu, 141 SDs, 0 SdLazy, 485 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 165 GetRequests, 50 SyntacticMatches, 4 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 12 MinimizatonAttempts, 58 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.8s InterpolantComputationTime, 110 NumberOfCodeBlocks, 110 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 125 ConstructedInterpolants, 10 QuantifiedInterpolants, 11648 SizeOfPredicates, 34 NumberOfNonLiveVariables, 267 ConjunctsInSsa, 68 ConjunctsInUnsatCore, 20 InterpolantComputations, 8 PerfectInterpolantSequences, 11/38 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: OVERALL_TIME[ms]: 652, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 6, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 403, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 12, TOOLS_QUANTIFIERELIM_TIME[ms]: 396, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 146, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 79, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 2, DOMAIN_WIDEN_TIME[ms]: 132, DOMAIN_ISSUBSETEQ_APPLICATIONS: 3, DOMAIN_ISSUBSETEQ_TIME[ms]: 10, DOMAIN_ISBOTTOM_APPLICATIONS: 6, DOMAIN_ISBOTTOM_TIME[ms]: 19, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 296, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 296, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 3, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 0, REGEX_TO_DAG_TIME[ms]: 0, DAG_COMPRESSION_TIME[ms]: 3, DAG_COMPRESSION_PROCESSED_NODES: 51, DAG_COMPRESSION_RETAINED_NODES: 20, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...