./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i --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_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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_205b821b-a244-4e1f-a5d4-035c3acf2c47/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 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:30:41,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:30:41,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:30:41,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:30:41,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:30:41,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:30:41,325 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:30:41,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:30:41,331 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:30:41,332 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:30:41,334 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:30:41,335 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:30:41,336 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:30:41,338 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:30:41,339 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:30:41,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:30:41,342 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:30:41,343 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:30:41,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:30:41,349 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:30:41,351 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:30:41,353 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:30:41,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:30:41,356 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:30:41,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:30:41,360 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:30:41,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:30:41,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:30:41,363 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:30:41,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:30:41,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:30:41,365 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:30:41,367 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:30:41,368 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:30:41,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:30:41,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:30:41,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:30:41,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:30:41,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:30:41,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:30:41,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:30:41,374 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:30:41,402 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:30:41,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:30:41,404 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:30:41,404 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:30:41,404 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:30:41,404 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:30:41,405 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:30:41,405 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:30:41,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:30:41,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:30:41,406 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:30:41,406 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:30:41,406 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:30:41,406 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:30:41,407 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:30:41,407 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:30:41,408 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:30:41,408 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:30:41,408 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:30:41,408 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:30:41,409 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:30:41,409 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:30:41,409 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:30:41,409 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:30:41,410 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:30:41,410 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:30:41,410 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:30:41,410 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:30:41,411 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:30:41,411 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:30:41,411 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:30:41,411 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:30:41,412 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:30:41,412 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:30:41,412 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:30:41,412 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:30:41,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:30:41,413 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:30:41,413 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:30:41,413 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_205b821b-a244-4e1f-a5d4-035c3acf2c47/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a3019657b4c9b0e8c0aa3e888313d420fe28d28 [2021-10-11 02:30:41,691 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:30:41,717 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:30:41,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:30:41,722 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:30:41,723 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:30:41,724 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-11 02:30:41,820 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/data/d73b52a33/931af204dc0b4126bf62b52694984696/FLAG0d77bffcb [2021-10-11 02:30:42,441 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:30:42,442 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/sv-benchmarks/c/array-memsafety/cstrpbrk_unsafe.i [2021-10-11 02:30:42,467 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/data/d73b52a33/931af204dc0b4126bf62b52694984696/FLAG0d77bffcb [2021-10-11 02:30:42,701 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/data/d73b52a33/931af204dc0b4126bf62b52694984696 [2021-10-11 02:30:42,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:30:42,706 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:30:42,708 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:42,709 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:30:42,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:30:42,714 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:42" (1/1) ... [2021-10-11 02:30:42,716 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba350a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:42, skipping insertion in model container [2021-10-11 02:30:42,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:30:42" (1/1) ... [2021-10-11 02:30:42,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:30:42,798 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:30:43,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:43,260 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:30:43,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:30:43,369 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:30:43,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43 WrapperNode [2021-10-11 02:30:43,370 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:30:43,371 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:43,371 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:30:43,372 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:30:43,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,398 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,429 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:30:43,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:30:43,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:30:43,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:30:43,441 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,441 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,445 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,446 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,469 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,471 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... [2021-10-11 02:30:43,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:30:43,476 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:30:43,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:30:43,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:30:43,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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 02:30:43,555 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:30:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:30:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-11 02:30:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:30:43,556 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:30:43,557 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:30:44,310 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:30:44,310 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2021-10-11 02:30:44,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:44 BoogieIcfgContainer [2021-10-11 02:30:44,313 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:30:44,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:30:44,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:30:44,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:30:44,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:30:42" (1/3) ... [2021-10-11 02:30:44,321 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e78c7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:44, skipping insertion in model container [2021-10-11 02:30:44,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:30:43" (2/3) ... [2021-10-11 02:30:44,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e78c7da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:30:44, skipping insertion in model container [2021-10-11 02:30:44,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:44" (3/3) ... [2021-10-11 02:30:44,324 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk_unsafe.i [2021-10-11 02:30:44,344 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:30:44,348 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 27 error locations. [2021-10-11 02:30:44,368 INFO L253 AbstractCegarLoop]: Starting to check reachability of 27 error locations. [2021-10-11 02:30:44,399 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:30:44,399 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:30:44,399 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:30:44,399 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:30:44,400 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:30:44,400 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:30:44,400 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:30:44,400 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:30:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-10-11 02:30:44,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:44,425 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:44,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:44,427 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:44,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,433 INFO L82 PathProgramCache]: Analyzing trace with hash 181214, now seen corresponding path program 1 times [2021-10-11 02:30:44,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866026293] [2021-10-11 02:30:44,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:44,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,623 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 02:30:44,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866026293] [2021-10-11 02:30:44,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:44,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:30:44,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917375069] [2021-10-11 02:30:44,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:44,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:44,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:44,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:44,652 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2021-10-11 02:30:44,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:44,734 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-10-11 02:30:44,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:44,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:44,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:44,747 INFO L225 Difference]: With dead ends: 50 [2021-10-11 02:30:44,747 INFO L226 Difference]: Without dead ends: 49 [2021-10-11 02:30:44,749 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 02:30:44,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-11 02:30:44,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-11 02:30:44,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-10-11 02:30:44,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-10-11 02:30:44,790 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 3 [2021-10-11 02:30:44,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:44,791 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-10-11 02:30:44,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:44,792 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-10-11 02:30:44,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:44,792 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:44,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:44,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:30:44,793 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:44,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:44,794 INFO L82 PathProgramCache]: Analyzing trace with hash 181215, now seen corresponding path program 1 times [2021-10-11 02:30:44,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:44,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906089717] [2021-10-11 02:30:44,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:44,904 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 02:30:44,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906089717] [2021-10-11 02:30:44,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:44,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:30:44,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006087253] [2021-10-11 02:30:44,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:30:44,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:44,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:30:44,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:30:44,911 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 4 states. [2021-10-11 02:30:45,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:45,127 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2021-10-11 02:30:45,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:30:45,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2021-10-11 02:30:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:45,134 INFO L225 Difference]: With dead ends: 95 [2021-10-11 02:30:45,134 INFO L226 Difference]: Without dead ends: 95 [2021-10-11 02:30:45,135 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 [2021-10-11 02:30:45,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-11 02:30:45,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 53. [2021-10-11 02:30:45,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-10-11 02:30:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-10-11 02:30:45,161 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 3 [2021-10-11 02:30:45,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:45,161 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-10-11 02:30:45,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:30:45,162 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-10-11 02:30:45,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:30:45,163 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:45,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:30:45,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:30:45,165 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:45,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:45,167 INFO L82 PathProgramCache]: Analyzing trace with hash 185719, now seen corresponding path program 1 times [2021-10-11 02:30:45,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:45,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830943541] [2021-10-11 02:30:45,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:45,242 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 02:30:45,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830943541] [2021-10-11 02:30:45,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:45,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:30:45,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753495947] [2021-10-11 02:30:45,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:30:45,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:45,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:30:45,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:30:45,249 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 3 states. [2021-10-11 02:30:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:45,331 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-10-11 02:30:45,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:30:45,332 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:30:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:45,333 INFO L225 Difference]: With dead ends: 51 [2021-10-11 02:30:45,333 INFO L226 Difference]: Without dead ends: 51 [2021-10-11 02:30:45,334 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 02:30:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-11 02:30:45,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-11 02:30:45,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-11 02:30:45,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-10-11 02:30:45,348 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 3 [2021-10-11 02:30:45,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:45,348 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-10-11 02:30:45,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:30:45,349 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-10-11 02:30:45,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:30:45,349 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:45,349 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:30:45,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:30:45,350 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:45,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash 174273092, now seen corresponding path program 1 times [2021-10-11 02:30:45,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:45,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145116908] [2021-10-11 02:30:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:45,442 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 02:30:45,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145116908] [2021-10-11 02:30:45,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238334555] [2021-10-11 02:30:45,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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 02:30:45,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:45,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 02:30:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:45,635 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 02:30:45,636 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:30:45,645 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:30:45,647 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:30:45,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:30:45,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:45,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:45,788 INFO L639 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2021-10-11 02:30:45,834 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 02:30:45,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930420398] [2021-10-11 02:30:45,862 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:30:45,862 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:45,870 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:45,880 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:45,881 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:46,615 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:46,991 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-10-11 02:30:47,083 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:47,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:47,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2021-10-11 02:30:47,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214845149] [2021-10-11 02:30:47,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 02:30:47,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:47,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 02:30:47,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-11 02:30:47,085 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 9 states. [2021-10-11 02:30:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:47,471 INFO L93 Difference]: Finished difference Result 131 states and 146 transitions. [2021-10-11 02:30:47,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:30:47,472 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2021-10-11 02:30:47,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:47,473 INFO L225 Difference]: With dead ends: 131 [2021-10-11 02:30:47,474 INFO L226 Difference]: Without dead ends: 131 [2021-10-11 02:30:47,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:30:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-11 02:30:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 45. [2021-10-11 02:30:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2021-10-11 02:30:47,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2021-10-11 02:30:47,480 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 5 [2021-10-11 02:30:47,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:47,481 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2021-10-11 02:30:47,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 02:30:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2021-10-11 02:30:47,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:30:47,481 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:47,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:30:47,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-10-11 02:30:47,696 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:47,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:47,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849616, now seen corresponding path program 1 times [2021-10-11 02:30:47,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:47,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143996445] [2021-10-11 02:30:47,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:47,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:47,801 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 02:30:47,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143996445] [2021-10-11 02:30:47,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:47,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:30:47,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692182285] [2021-10-11 02:30:47,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:30:47,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:47,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:30:47,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:30:47,804 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 5 states. [2021-10-11 02:30:47,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:47,883 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-10-11 02:30:47,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:30:47,884 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-10-11 02:30:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:47,885 INFO L225 Difference]: With dead ends: 42 [2021-10-11 02:30:47,885 INFO L226 Difference]: Without dead ends: 42 [2021-10-11 02:30:47,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:30:47,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-11 02:30:47,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-11 02:30:47,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-10-11 02:30:47,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2021-10-11 02:30:47,901 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 6 [2021-10-11 02:30:47,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:47,904 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2021-10-11 02:30:47,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:30:47,904 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2021-10-11 02:30:47,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:30:47,904 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:47,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:30:47,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-10-11 02:30:47,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:47,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:47,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1241849617, now seen corresponding path program 1 times [2021-10-11 02:30:47,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:47,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411443536] [2021-10-11 02:30:47,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:48,055 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 02:30:48,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411443536] [2021-10-11 02:30:48,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:48,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:30:48,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505563911] [2021-10-11 02:30:48,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:30:48,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:48,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:30:48,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:30:48,057 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand 6 states. [2021-10-11 02:30:48,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:48,462 INFO L93 Difference]: Finished difference Result 221 states and 245 transitions. [2021-10-11 02:30:48,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:30:48,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2021-10-11 02:30:48,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:48,469 INFO L225 Difference]: With dead ends: 221 [2021-10-11 02:30:48,469 INFO L226 Difference]: Without dead ends: 221 [2021-10-11 02:30:48,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-10-11 02:30:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-10-11 02:30:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 63. [2021-10-11 02:30:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-10-11 02:30:48,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 85 transitions. [2021-10-11 02:30:48,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 85 transitions. Word has length 6 [2021-10-11 02:30:48,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:48,495 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 85 transitions. [2021-10-11 02:30:48,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:30:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 85 transitions. [2021-10-11 02:30:48,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:30:48,497 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:48,497 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:48,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-10-11 02:30:48,498 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:48,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:48,498 INFO L82 PathProgramCache]: Analyzing trace with hash -707536244, now seen corresponding path program 1 times [2021-10-11 02:30:48,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:48,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573770807] [2021-10-11 02:30:48,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:48,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:48,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:48,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573770807] [2021-10-11 02:30:48,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363516379] [2021-10-11 02:30:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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 02:30:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:48,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-11 02:30:48,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:48,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:48,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:49,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:49,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1660881542] [2021-10-11 02:30:49,098 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:30:49,098 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:49,099 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:49,099 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:49,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:49,235 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:49,682 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:50,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:50,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 19 [2021-10-11 02:30:50,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928390017] [2021-10-11 02:30:50,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:30:50,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:30:50,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-11 02:30:50,256 INFO L87 Difference]: Start difference. First operand 63 states and 85 transitions. Second operand 8 states. [2021-10-11 02:30:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:50,840 INFO L93 Difference]: Finished difference Result 145 states and 203 transitions. [2021-10-11 02:30:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 02:30:50,841 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 8 [2021-10-11 02:30:50,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:50,843 INFO L225 Difference]: With dead ends: 145 [2021-10-11 02:30:50,843 INFO L226 Difference]: Without dead ends: 145 [2021-10-11 02:30:50,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-10-11 02:30:50,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-10-11 02:30:50,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 64. [2021-10-11 02:30:50,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-10-11 02:30:50,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 87 transitions. [2021-10-11 02:30:50,849 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 87 transitions. Word has length 8 [2021-10-11 02:30:50,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:50,849 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 87 transitions. [2021-10-11 02:30:50,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:30:50,850 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 87 transitions. [2021-10-11 02:30:50,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:30:50,850 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:50,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:51,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-11 02:30:51,064 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash -906332610, now seen corresponding path program 1 times [2021-10-11 02:30:51,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:51,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941389664] [2021-10-11 02:30:51,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:51,108 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 02:30:51,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941389664] [2021-10-11 02:30:51,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:51,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:30:51,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046291140] [2021-10-11 02:30:51,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:30:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:51,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:30:51,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:30:51,110 INFO L87 Difference]: Start difference. First operand 64 states and 87 transitions. Second operand 5 states. [2021-10-11 02:30:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:51,199 INFO L93 Difference]: Finished difference Result 78 states and 101 transitions. [2021-10-11 02:30:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:30:51,200 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 02:30:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:51,201 INFO L225 Difference]: With dead ends: 78 [2021-10-11 02:30:51,201 INFO L226 Difference]: Without dead ends: 78 [2021-10-11 02:30:51,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:30:51,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-11 02:30:51,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2021-10-11 02:30:51,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2021-10-11 02:30:51,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2021-10-11 02:30:51,210 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 9 [2021-10-11 02:30:51,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:51,210 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2021-10-11 02:30:51,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:30:51,210 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2021-10-11 02:30:51,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:30:51,211 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:51,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:51,212 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-10-11 02:30:51,212 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:51,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:51,212 INFO L82 PathProgramCache]: Analyzing trace with hash -906332609, now seen corresponding path program 1 times [2021-10-11 02:30:51,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:51,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330243371] [2021-10-11 02:30:51,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:51,305 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 02:30:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330243371] [2021-10-11 02:30:51,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:30:51,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:30:51,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492317328] [2021-10-11 02:30:51,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:30:51,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:30:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:30:51,308 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand 5 states. [2021-10-11 02:30:51,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:51,424 INFO L93 Difference]: Finished difference Result 100 states and 130 transitions. [2021-10-11 02:30:51,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:30:51,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2021-10-11 02:30:51,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:51,426 INFO L225 Difference]: With dead ends: 100 [2021-10-11 02:30:51,426 INFO L226 Difference]: Without dead ends: 100 [2021-10-11 02:30:51,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-11 02:30:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-11 02:30:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 71. [2021-10-11 02:30:51,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-10-11 02:30:51,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 95 transitions. [2021-10-11 02:30:51,431 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 95 transitions. Word has length 9 [2021-10-11 02:30:51,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:51,432 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 95 transitions. [2021-10-11 02:30:51,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:30:51,432 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 95 transitions. [2021-10-11 02:30:51,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:30:51,433 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:51,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:51,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-10-11 02:30:51,433 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:51,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:51,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1442833850, now seen corresponding path program 1 times [2021-10-11 02:30:51,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:51,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766056446] [2021-10-11 02:30:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 02:30:51,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766056446] [2021-10-11 02:30:51,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595180003] [2021-10-11 02:30:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/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 02:30:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:30:51,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-11 02:30:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:30:51,838 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 02:30:51,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:30:52,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:30:52,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1269135366] [2021-10-11 02:30:52,074 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-11 02:30:52,074 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:30:52,075 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:30:52,075 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:30:52,075 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:30:52,513 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:52,570 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:53,616 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:53,686 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:53,700 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:53,714 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:54,365 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:54,383 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:54,500 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:54,517 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-11 02:30:54,651 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:30:55,117 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2021-10-11 02:30:55,533 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2021-10-11 02:30:55,685 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:30:55,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:30:55,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2021-10-11 02:30:55,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605510029] [2021-10-11 02:30:55,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-10-11 02:30:55,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:30:55,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-11 02:30:55,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2021-10-11 02:30:55,688 INFO L87 Difference]: Start difference. First operand 71 states and 95 transitions. Second operand 16 states. [2021-10-11 02:30:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:30:57,350 INFO L93 Difference]: Finished difference Result 235 states and 273 transitions. [2021-10-11 02:30:57,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-11 02:30:57,350 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 10 [2021-10-11 02:30:57,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:30:57,351 INFO L225 Difference]: With dead ends: 235 [2021-10-11 02:30:57,352 INFO L226 Difference]: Without dead ends: 235 [2021-10-11 02:30:57,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=331, Invalid=1391, Unknown=0, NotChecked=0, Total=1722 [2021-10-11 02:30:57,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-10-11 02:30:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 62. [2021-10-11 02:30:57,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-10-11 02:30:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 80 transitions. [2021-10-11 02:30:57,357 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 80 transitions. Word has length 10 [2021-10-11 02:30:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:30:57,357 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 80 transitions. [2021-10-11 02:30:57,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-10-11 02:30:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 80 transitions. [2021-10-11 02:30:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:30:57,358 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:30:57,358 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:30:57,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-10-11 02:30:57,567 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr23ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr26ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2021-10-11 02:30:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:30:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1968376831, now seen corresponding path program 1 times [2021-10-11 02:30:57,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:30:57,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548608676] [2021-10-11 02:30:57,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:30:57,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:57,581 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:57,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-11 02:30:57,597 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-11 02:30:57,620 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-11 02:30:57,620 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-10-11 02:30:57,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-10-11 02:30:57,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:30:57 BoogieIcfgContainer [2021-10-11 02:30:57,662 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:30:57,663 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:30:57,663 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:30:57,663 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:30:57,664 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:30:44" (3/4) ... [2021-10-11 02:30:57,666 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-11 02:30:57,706 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_205b821b-a244-4e1f-a5d4-035c3acf2c47/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:30:57,706 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:30:57,707 INFO L168 Benchmark]: Toolchain (without parser) took 15000.29 ms. Allocated memory was 94.4 MB in the beginning and 270.5 MB in the end (delta: 176.2 MB). Free memory was 65.0 MB in the beginning and 215.7 MB in the end (delta: -150.6 MB). Peak memory consumption was 25.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,707 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:30:57,707 INFO L168 Benchmark]: CACSL2BoogieTranslator took 661.70 ms. Allocated memory was 94.4 MB in the beginning and 125.8 MB in the end (delta: 31.5 MB). Free memory was 64.8 MB in the beginning and 91.0 MB in the end (delta: -26.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,708 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.49 ms. Allocated memory is still 125.8 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,708 INFO L168 Benchmark]: Boogie Preprocessor took 44.52 ms. Allocated memory is still 125.8 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,708 INFO L168 Benchmark]: RCFGBuilder took 837.96 ms. Allocated memory is still 125.8 MB. Free memory was 87.8 MB in the beginning and 86.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,709 INFO L168 Benchmark]: TraceAbstraction took 13346.97 ms. Allocated memory was 125.8 MB in the beginning and 270.5 MB in the end (delta: 144.7 MB). Free memory was 86.3 MB in the beginning and 217.8 MB in the end (delta: -131.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,709 INFO L168 Benchmark]: Witness Printer took 43.47 ms. Allocated memory is still 270.5 MB. Free memory was 217.8 MB in the beginning and 215.7 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:30:57,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory is still 49.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 661.70 ms. Allocated memory was 94.4 MB in the beginning and 125.8 MB in the end (delta: 31.5 MB). Free memory was 64.8 MB in the beginning and 91.0 MB in the end (delta: -26.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.49 ms. Allocated memory is still 125.8 MB. Free memory was 91.0 MB in the beginning and 88.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.52 ms. Allocated memory is still 125.8 MB. Free memory was 88.9 MB in the beginning and 87.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 837.96 ms. Allocated memory is still 125.8 MB. Free memory was 87.8 MB in the beginning and 86.3 MB in the end (delta: 1.5 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 13346.97 ms. Allocated memory was 125.8 MB in the beginning and 270.5 MB in the end (delta: 144.7 MB). Free memory was 86.3 MB in the beginning and 217.8 MB in the end (delta: -131.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * Witness Printer took 43.47 ms. Allocated memory is still 270.5 MB. Free memory was 217.8 MB in the beginning and 215.7 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: 548]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L515] int length = __VERIFIER_nondet_int(); [L516] COND FALSE !(length < 1) [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L546] char* s1 = build_nondet_String(); [L515] int length = __VERIFIER_nondet_int(); [L516] COND TRUE length < 1 [L517] length = 1 [L519] char* nondetString = (char*) malloc(length * sizeof(char)); [L521] int i = 0; [L521] COND FALSE !(i < length - 1) [L527] nondetString[length-1] = '\0' [L528] return nondetString; [L547] char* s2 = build_nondet_String(); [L532] const char *sc1; [L533] const char *s; [L534] int c; [L535] sc1 = s1 [L535] EXPR \read(*sc1) [L535] COND FALSE !(*sc1 != '\0') [L543] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 27 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 13.2s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 383 SDtfs, 1892 SDslu, 739 SDs, 0 SdLazy, 1267 SolverSat, 135 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 130 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 4.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=71occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 586 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 95 NumberOfCodeBlocks, 95 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 7058 SizeOfPredicates, 36 NumberOfNonLiveVariables, 243 ConjunctsInSsa, 76 ConjunctsInUnsatCore, 16 InterpolantComputations, 7 PerfectInterpolantSequences, 3/15 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]: 584, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 8, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 12, TOOLS_POST_TIME[ms]: 468, 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]: 463, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 178, FLUID_QUERY_TIME[ms]: 1, FLUID_QUERIES: 26, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME[ms]: 40, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME[ms]: 24, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME[ms]: 26, DOMAIN_ISBOTTOM_APPLICATIONS: 8, DOMAIN_ISBOTTOM_TIME[ms]: 14, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 110, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 110, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, 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]: 5, DAG_COMPRESSION_PROCESSED_NODES: 76, DAG_COMPRESSION_RETAINED_NODES: 24, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...