./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI --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 bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:23:45,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:23:45,451 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:23:45,509 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:23:45,509 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:23:45,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:23:45,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:23:45,528 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:23:45,530 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:23:45,531 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:23:45,532 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:23:45,534 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:23:45,534 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:23:45,535 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:23:45,536 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:23:45,538 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:23:45,538 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:23:45,539 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:23:45,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:23:45,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:23:45,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:23:45,547 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:23:45,549 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:23:45,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:23:45,553 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:23:45,554 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:23:45,554 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:23:45,555 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:23:45,556 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:23:45,557 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:23:45,557 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:23:45,558 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:23:45,558 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:23:45,559 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:23:45,564 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:23:45,564 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:23:45,565 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:23:45,566 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:23:45,566 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:23:45,567 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:23:45,568 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:23:45,570 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:23:45,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:23:45,619 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:23:45,620 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:23:45,621 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:23:45,621 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:23:45,621 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:23:45,621 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:23:45,622 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:23:45,622 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:23:45,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:23:45,623 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:23:45,624 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:23:45,624 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:23:45,624 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:23:45,624 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:23:45,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:23:45,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:23:45,626 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:23:45,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:23:45,626 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:23:45,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:23:45,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:23:45,627 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:23:45,627 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:23:45,627 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:23:45,627 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:23:45,629 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:23:45,630 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:23:45,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:23:45,630 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:23:45,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:23:45,631 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:23:45,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:23:45,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:23:45,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:23:45,632 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:23:45,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:23:45,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:23:45,633 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:23:45,633 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_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bd24d7b29a77a6b0da9f8cbc1fae4e00216bc104 [2021-10-11 02:23:45,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:23:45,917 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:23:45,919 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:23:45,921 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:23:45,922 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:23:45,923 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-10-11 02:23:46,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/data/18c7614a9/d42ab15d426d484bb2a5ca4d03ae5190/FLAG83cfbc43d [2021-10-11 02:23:46,448 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:23:46,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2021-10-11 02:23:46,465 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/data/18c7614a9/d42ab15d426d484bb2a5ca4d03ae5190/FLAG83cfbc43d [2021-10-11 02:23:46,832 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/data/18c7614a9/d42ab15d426d484bb2a5ca4d03ae5190 [2021-10-11 02:23:46,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:23:46,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:23:46,838 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:46,838 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:23:46,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:23:46,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:46" (1/1) ... [2021-10-11 02:23:46,845 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a7555d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:46, skipping insertion in model container [2021-10-11 02:23:46,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:23:46" (1/1) ... [2021-10-11 02:23:46,852 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:23:46,863 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:23:46,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:47,002 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:23:47,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:23:47,050 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:23:47,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47 WrapperNode [2021-10-11 02:23:47,051 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:23:47,052 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:47,053 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:23:47,053 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:23:47,062 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,070 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:23:47,093 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:23:47,093 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:23:47,094 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:23:47,103 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,103 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,119 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,124 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,129 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,136 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... [2021-10-11 02:23:47,138 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:23:47,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:23:47,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:23:47,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:23:47,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:23:47,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:23:47,247 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:23:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:23:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:23:47,247 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:23:47,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:23:47,663 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-11 02:23:47,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:47 BoogieIcfgContainer [2021-10-11 02:23:47,666 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:23:47,668 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:23:47,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:23:47,672 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:23:47,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:23:46" (1/3) ... [2021-10-11 02:23:47,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb019c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:47, skipping insertion in model container [2021-10-11 02:23:47,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:23:47" (2/3) ... [2021-10-11 02:23:47,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cb019c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:23:47, skipping insertion in model container [2021-10-11 02:23:47,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:47" (3/3) ... [2021-10-11 02:23:47,677 INFO L111 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2021-10-11 02:23:47,694 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:23:47,698 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2021-10-11 02:23:47,710 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2021-10-11 02:23:47,743 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:23:47,744 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:23:47,744 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:23:47,744 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:23:47,744 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:23:47,744 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:23:47,745 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:23:47,745 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:23:47,762 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:23:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:23:47,771 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:47,771 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:23:47,773 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:47,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:47,779 INFO L82 PathProgramCache]: Analyzing trace with hash 68553, now seen corresponding path program 1 times [2021-10-11 02:23:47,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:47,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045917982] [2021-10-11 02:23:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:47,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:47,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045917982] [2021-10-11 02:23:47,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:47,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:23:47,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288885122] [2021-10-11 02:23:47,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:47,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:47,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:47,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:47,992 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:23:48,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:48,083 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-11 02:23:48,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:48,086 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:23:48,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:48,097 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:23:48,098 INFO L226 Difference]: Without dead ends: 16 [2021-10-11 02:23:48,109 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 [2021-10-11 02:23:48,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-11 02:23:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-10-11 02:23:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:23:48,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-11 02:23:48,147 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2021-10-11 02:23:48,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:48,147 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-11 02:23:48,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-11 02:23:48,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:23:48,148 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:48,148 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:23:48,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:23:48,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:48,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:48,152 INFO L82 PathProgramCache]: Analyzing trace with hash 68554, now seen corresponding path program 1 times [2021-10-11 02:23:48,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:48,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524519397] [2021-10-11 02:23:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:48,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524519397] [2021-10-11 02:23:48,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:48,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:23:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365738549] [2021-10-11 02:23:48,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:48,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:48,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:48,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:48,272 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 3 states. [2021-10-11 02:23:48,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:48,331 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-10-11 02:23:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:48,333 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:23:48,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:48,334 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:23:48,334 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:23:48,335 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 [2021-10-11 02:23:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:23:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:23:48,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:23:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-11 02:23:48,344 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2021-10-11 02:23:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:48,345 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-11 02:23:48,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-11 02:23:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:23:48,346 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:48,347 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:23:48,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:23:48,347 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:48,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:48,348 INFO L82 PathProgramCache]: Analyzing trace with hash 65909547, now seen corresponding path program 1 times [2021-10-11 02:23:48,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:48,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328818585] [2021-10-11 02:23:48,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:48,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328818585] [2021-10-11 02:23:48,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443814822] [2021-10-11 02:23:48,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:48,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-11 02:23:48,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:48,551 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-11 02:23:48,556 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:23:48,564 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:23:48,566 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:23:48,566 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:23:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:48,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:48,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:48,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [814982262] [2021-10-11 02:23:48,716 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:23:48,730 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:48,735 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:48,741 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:48,742 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:49,413 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:49,552 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-10-11 02:23:49,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:49,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:49,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:23:49,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295226862] [2021-10-11 02:23:49,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:49,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:49,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:49,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:23:49,716 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 6 states. [2021-10-11 02:23:49,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:49,863 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-10-11 02:23:49,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:23:49,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:23:49,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:49,866 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:23:49,866 INFO L226 Difference]: Without dead ends: 45 [2021-10-11 02:23:49,867 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:23:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-11 02:23:49,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 23. [2021-10-11 02:23:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:23:49,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-10-11 02:23:49,877 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2021-10-11 02:23:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:49,877 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-10-11 02:23:49,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-10-11 02:23:49,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:23:49,878 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:49,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2021-10-11 02:23:50,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:23:50,102 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:50,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:50,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1085404557, now seen corresponding path program 1 times [2021-10-11 02:23:50,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:50,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250266888] [2021-10-11 02:23:50,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:50,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:50,139 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:23:50,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250266888] [2021-10-11 02:23:50,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:50,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:23:50,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052923307] [2021-10-11 02:23:50,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:23:50,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:50,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:23:50,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:23:50,143 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 3 states. [2021-10-11 02:23:50,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:50,159 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 02:23:50,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:23:50,159 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2021-10-11 02:23:50,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:50,164 INFO L225 Difference]: With dead ends: 21 [2021-10-11 02:23:50,164 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:23:50,164 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 [2021-10-11 02:23:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:23:50,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-11 02:23:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:23:50,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-10-11 02:23:50,170 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 7 [2021-10-11 02:23:50,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:50,170 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-10-11 02:23:50,170 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:23:50,170 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-10-11 02:23:50,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:23:50,172 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:50,172 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:50,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-10-11 02:23:50,173 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:50,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:50,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1521587250, now seen corresponding path program 1 times [2021-10-11 02:23:50,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:50,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904668134] [2021-10-11 02:23:50,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:50,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:50,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:50,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904668134] [2021-10-11 02:23:50,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718230616] [2021-10-11 02:23:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:50,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:23:50,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:50,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:50,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:50,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [189475123] [2021-10-11 02:23:50,371 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:50,372 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:50,372 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:50,372 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:50,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:50,719 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:51,157 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:51,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:51,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:23:51,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785583899] [2021-10-11 02:23:51,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:23:51,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:51,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:23:51,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:23:51,164 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 8 states. [2021-10-11 02:23:51,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:51,210 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-11 02:23:51,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:23:51,211 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 02:23:51,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:51,212 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:23:51,213 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:23:51,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:23:51,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:23:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-10-11 02:23:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:23:51,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-11 02:23:51,220 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-10-11 02:23:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:51,227 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-11 02:23:51,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:23:51,227 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-11 02:23:51,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:23:51,228 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,229 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:23:51,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:51,445 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:51,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:51,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1028263986, now seen corresponding path program 2 times [2021-10-11 02:23:51,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:51,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432570691] [2021-10-11 02:23:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:51,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:51,552 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:51,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432570691] [2021-10-11 02:23:51,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:23:51,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:23:51,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705627884] [2021-10-11 02:23:51,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:23:51,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:51,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:23:51,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:51,554 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 8 states. [2021-10-11 02:23:51,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:51,593 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-11 02:23:51,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:23:51,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-10-11 02:23:51,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:51,594 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:23:51,594 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:23:51,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:23:51,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:23:51,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 02:23:51,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:23:51,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-11 02:23:51,597 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 11 [2021-10-11 02:23:51,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:51,597 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-11 02:23:51,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:23:51,597 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-10-11 02:23:51,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:23:51,598 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:51,598 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:51,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-10-11 02:23:51,598 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:51,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:51,599 INFO L82 PathProgramCache]: Analyzing trace with hash 284746670, now seen corresponding path program 2 times [2021-10-11 02:23:51,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:51,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562232801] [2021-10-11 02:23:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:51,673 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:51,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562232801] [2021-10-11 02:23:51,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215075834] [2021-10-11 02:23:51,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:51,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:23:51,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:23:51,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:23:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:23:51,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:23:51,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:23:51,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2021-10-11 02:23:51,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013609498] [2021-10-11 02:23:51,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:23:51,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:51,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:23:51,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:23:51,943 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2021-10-11 02:23:52,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:52,029 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-10-11 02:23:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:23:52,029 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2021-10-11 02:23:52,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:52,030 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:23:52,030 INFO L226 Difference]: Without dead ends: 23 [2021-10-11 02:23:52,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:23:52,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-11 02:23:52,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-11 02:23:52,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:23:52,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-11 02:23:52,037 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 18 [2021-10-11 02:23:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:52,038 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-11 02:23:52,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:23:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-11 02:23:52,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:23:52,039 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:52,039 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:52,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-11 02:23:52,253 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:52,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:52,253 INFO L82 PathProgramCache]: Analyzing trace with hash 284738725, now seen corresponding path program 1 times [2021-10-11 02:23:52,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:52,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227276766] [2021-10-11 02:23:52,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:52,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:52,329 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227276766] [2021-10-11 02:23:52,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597320706] [2021-10-11 02:23:52,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/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 [2021-10-11 02:23:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:23:52,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:23:52,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:23:52,414 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:23:52,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:23:52,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930655713] [2021-10-11 02:23:52,492 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:23:52,492 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:23:52,493 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:23:52,493 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:23:52,493 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:23:52,734 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:23:53,185 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:23:53,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:23:53,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2021-10-11 02:23:53,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366927637] [2021-10-11 02:23:53,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 02:23:53,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:23:53,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 02:23:53,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:23:53,187 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 12 states. [2021-10-11 02:23:53,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:23:53,244 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-11 02:23:53,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 02:23:53,244 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 18 [2021-10-11 02:23:53,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:23:53,245 INFO L225 Difference]: With dead ends: 31 [2021-10-11 02:23:53,245 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:23:53,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-10-11 02:23:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:23:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-11 02:23:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2021-10-11 02:23:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-11 02:23:53,249 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 18 [2021-10-11 02:23:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:23:53,249 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-11 02:23:53,249 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 02:23:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-11 02:23:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-11 02:23:53,250 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:23:53,250 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-10-11 02:23:53,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:23:53,476 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:23:53,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:23:53,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2141640737, now seen corresponding path program 2 times [2021-10-11 02:23:53,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:23:53,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419559138] [2021-10-11 02:23:53,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:23:53,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:53,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:23:53,543 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:23:53,573 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:23:53,574 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:23:53,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-10-11 02:23:53,603 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:23:53 BoogieIcfgContainer [2021-10-11 02:23:53,603 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:23:53,603 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:23:53,604 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:23:53,604 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:23:53,604 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:23:47" (3/4) ... [2021-10-11 02:23:53,606 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:23:53,660 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_be5c4aab-1529-4f86-b3a3-79db064d1105/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:23:53,661 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:23:53,662 INFO L168 Benchmark]: Toolchain (without parser) took 6825.04 ms. Allocated memory was 86.0 MB in the beginning and 146.8 MB in the end (delta: 60.8 MB). Free memory was 53.9 MB in the beginning and 92.5 MB in the end (delta: -38.5 MB). Peak memory consumption was 22.0 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,662 INFO L168 Benchmark]: CDTParser took 16.10 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 57.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,663 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.21 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 53.8 MB in the beginning and 99.8 MB in the end (delta: -46.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,663 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.04 ms. Allocated memory is still 121.6 MB. Free memory was 99.1 MB in the beginning and 98.4 MB in the end (delta: 675.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:23:53,664 INFO L168 Benchmark]: Boogie Preprocessor took 47.40 ms. Allocated memory is still 121.6 MB. Free memory was 98.4 MB in the beginning and 97.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,664 INFO L168 Benchmark]: RCFGBuilder took 525.53 ms. Allocated memory is still 121.6 MB. Free memory was 97.0 MB in the beginning and 81.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,665 INFO L168 Benchmark]: TraceAbstraction took 5934.51 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 81.7 MB in the beginning and 94.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,665 INFO L168 Benchmark]: Witness Printer took 57.23 ms. Allocated memory is still 146.8 MB. Free memory was 94.6 MB in the beginning and 92.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:23:53,668 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 16.10 ms. Allocated memory is still 86.0 MB. Free memory was 42.5 MB in the beginning and 57.9 MB in the end (delta: -15.4 MB). Peak memory consumption was 5.5 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 213.21 ms. Allocated memory was 86.0 MB in the beginning and 121.6 MB in the end (delta: 35.7 MB). Free memory was 53.8 MB in the beginning and 99.8 MB in the end (delta: -46.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.04 ms. Allocated memory is still 121.6 MB. Free memory was 99.1 MB in the beginning and 98.4 MB in the end (delta: 675.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 47.40 ms. Allocated memory is still 121.6 MB. Free memory was 98.4 MB in the beginning and 97.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 525.53 ms. Allocated memory is still 121.6 MB. Free memory was 97.0 MB in the beginning and 81.7 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5934.51 ms. Allocated memory was 121.6 MB in the beginning and 146.8 MB in the end (delta: 25.2 MB). Free memory was 81.7 MB in the beginning and 94.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 14.4 MB. Max. memory is 16.1 GB. * Witness Printer took 57.23 ms. Allocated memory is still 146.8 MB. Free memory was 94.6 MB in the beginning and 92.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ [L9] COND FALSE !(i < 10) [L13] EXPR p[2] [L13] COND TRUE p[2] == 'a' [L14] free(p) [L14] free(p) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 9, TraceHistogramMax: 10, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 71 SDtfs, 138 SDslu, 55 SDs, 0 SdLazy, 186 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 161 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=8, 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, 8 MinimizatonAttempts, 24 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 152 NumberOfCodeBlocks, 140 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 161 ConstructedInterpolants, 1 QuantifiedInterpolants, 14436 SizeOfPredicates, 4 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 16 InterpolantComputations, 6 PerfectInterpolantSequences, 96/258 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...