./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/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_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/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_c5902bfa-ec79-4250-b0b6-ba63a51e7828/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 87dcbb1d4539995e5aba39e6053775ca0fac811e ....................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:32:39,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:32:39,383 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:32:39,428 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:32:39,429 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:32:39,434 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:32:39,436 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:32:39,440 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:32:39,443 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:32:39,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:32:39,450 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:32:39,451 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:32:39,452 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:32:39,455 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:32:39,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:32:39,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:32:39,460 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:32:39,464 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:32:39,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:32:39,475 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:32:39,477 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:32:39,479 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:32:39,482 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:32:39,483 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:32:39,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:32:39,492 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:32:39,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:32:39,495 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:32:39,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:32:39,497 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:32:39,497 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:32:39,498 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:32:39,500 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:32:39,501 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:32:39,503 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:32:39,503 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:32:39,504 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:32:39,504 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:32:39,504 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:32:39,505 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:32:39,506 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:32:39,507 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-11 02:32:39,548 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:32:39,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:32:39,550 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:32:39,550 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:32:39,551 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:32:39,551 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:32:39,551 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:32:39,551 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:32:39,551 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:32:39,552 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:32:39,553 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:32:39,553 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:32:39,553 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:32:39,553 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:32:39,554 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:32:39,554 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:32:39,555 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:32:39,555 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:32:39,555 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:32:39,555 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:32:39,555 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:32:39,556 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:32:39,557 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:32:39,557 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:32:39,557 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:32:39,557 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:32:39,558 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:32:39,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:32:39,558 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:32:39,558 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:32:39,559 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:32:39,559 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:32:39,559 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:32:39,559 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:32:39,559 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_c5902bfa-ec79-4250-b0b6-ba63a51e7828/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 87dcbb1d4539995e5aba39e6053775ca0fac811e [2021-10-11 02:32:39,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:32:39,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:32:39,880 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:32:39,881 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:32:39,883 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:32:39,884 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2021-10-11 02:32:39,957 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/data/61bc3d18d/74298917496848d097a9a00a85a1f1a9/FLAG24d2701fd [2021-10-11 02:32:40,468 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:32:40,468 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/sv-benchmarks/c/memsafety-ext3/scopes4-1.c [2021-10-11 02:32:40,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/data/61bc3d18d/74298917496848d097a9a00a85a1f1a9/FLAG24d2701fd [2021-10-11 02:32:40,850 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/data/61bc3d18d/74298917496848d097a9a00a85a1f1a9 [2021-10-11 02:32:40,853 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:32:40,854 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:32:40,857 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:40,858 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:32:40,863 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:32:40,865 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:40" (1/1) ... [2021-10-11 02:32:40,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@242ad16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:40, skipping insertion in model container [2021-10-11 02:32:40,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:32:40" (1/1) ... [2021-10-11 02:32:40,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:32:40,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:32:41,043 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:41,058 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:32:41,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:32:41,089 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:32:41,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41 WrapperNode [2021-10-11 02:32:41,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:32:41,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:41,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:32:41,091 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:32:41,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,105 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,120 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:32:41,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:32:41,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:32:41,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:32:41,130 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,131 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,132 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,140 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... [2021-10-11 02:32:41,143 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:32:41,144 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:32:41,144 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:32:41,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:32:41,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/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 02:32:41,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:32:41,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:32:41,242 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:32:41,242 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:32:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:32:41,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:32:41,601 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:32:41,602 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-11 02:32:41,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:41 BoogieIcfgContainer [2021-10-11 02:32:41,604 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:32:41,606 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:32:41,606 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:32:41,609 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:32:41,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:32:40" (1/3) ... [2021-10-11 02:32:41,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0b0c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:41, skipping insertion in model container [2021-10-11 02:32:41,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:32:41" (2/3) ... [2021-10-11 02:32:41,611 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e0b0c53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:32:41, skipping insertion in model container [2021-10-11 02:32:41,612 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:41" (3/3) ... [2021-10-11 02:32:41,613 INFO L111 eAbstractionObserver]: Analyzing ICFG scopes4-1.c [2021-10-11 02:32:41,628 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:32:41,631 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2021-10-11 02:32:41,643 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-10-11 02:32:41,668 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:32:41,669 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:32:41,669 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:32:41,669 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:32:41,669 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:32:41,670 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:32:41,670 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:32:41,670 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:32:41,686 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 02:32:41,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:32:41,693 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:41,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:32:41,696 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:41,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:41,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1554, now seen corresponding path program 1 times [2021-10-11 02:32:41,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:41,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978521903] [2021-10-11 02:32:41,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:41,906 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 02:32:41,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978521903] [2021-10-11 02:32:41,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:41,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831683845] [2021-10-11 02:32:41,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:41,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:41,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:41,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:41,930 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 02:32:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:41,976 INFO L93 Difference]: Finished difference Result 9 states and 8 transitions. [2021-10-11 02:32:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:41,978 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2021-10-11 02:32:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:41,987 INFO L225 Difference]: With dead ends: 9 [2021-10-11 02:32:41,987 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 02:32:41,989 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 02:32:42,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 02:32:42,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 02:32:42,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 02:32:42,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 7 transitions. [2021-10-11 02:32:42,024 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 7 transitions. Word has length 2 [2021-10-11 02:32:42,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,025 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 7 transitions. [2021-10-11 02:32:42,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:42,025 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 7 transitions. [2021-10-11 02:32:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-11 02:32:42,026 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:42,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1] [2021-10-11 02:32:42,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:32:42,027 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:42,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:42,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1555, now seen corresponding path program 1 times [2021-10-11 02:32:42,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:42,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950715554] [2021-10-11 02:32:42,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:42,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:42,090 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 02:32:42,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950715554] [2021-10-11 02:32:42,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:42,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643392839] [2021-10-11 02:32:42,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:42,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:42,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:42,100 INFO L87 Difference]: Start difference. First operand 8 states and 7 transitions. Second operand 3 states. [2021-10-11 02:32:42,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:42,112 INFO L93 Difference]: Finished difference Result 7 states and 6 transitions. [2021-10-11 02:32:42,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:42,113 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 2 [2021-10-11 02:32:42,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:42,119 INFO L225 Difference]: With dead ends: 7 [2021-10-11 02:32:42,119 INFO L226 Difference]: Without dead ends: 7 [2021-10-11 02:32:42,120 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 02:32:42,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-11 02:32:42,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-11 02:32:42,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-10-11 02:32:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 6 transitions. [2021-10-11 02:32:42,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 6 transitions. Word has length 2 [2021-10-11 02:32:42,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,123 INFO L481 AbstractCegarLoop]: Abstraction has 7 states and 6 transitions. [2021-10-11 02:32:42,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:42,123 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 6 transitions. [2021-10-11 02:32:42,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:42,124 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:42,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:42,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:32:42,124 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 48775, now seen corresponding path program 1 times [2021-10-11 02:32:42,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:42,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136793121] [2021-10-11 02:32:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:42,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:42,185 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 02:32:42,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136793121] [2021-10-11 02:32:42,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:42,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854818072] [2021-10-11 02:32:42,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:42,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:42,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:42,197 INFO L87 Difference]: Start difference. First operand 7 states and 6 transitions. Second operand 3 states. [2021-10-11 02:32:42,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:42,206 INFO L93 Difference]: Finished difference Result 6 states and 5 transitions. [2021-10-11 02:32:42,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:42,207 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:32:42,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:42,207 INFO L225 Difference]: With dead ends: 6 [2021-10-11 02:32:42,207 INFO L226 Difference]: Without dead ends: 6 [2021-10-11 02:32:42,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-11 02:32:42,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-11 02:32:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-10-11 02:32:42,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2021-10-11 02:32:42,209 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 3 [2021-10-11 02:32:42,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,210 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2021-10-11 02:32:42,210 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:42,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2021-10-11 02:32:42,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:32:42,210 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:42,211 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:32:42,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:32:42,211 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:42,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:42,212 INFO L82 PathProgramCache]: Analyzing trace with hash 48776, now seen corresponding path program 1 times [2021-10-11 02:32:42,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:42,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711764374] [2021-10-11 02:32:42,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:42,281 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 02:32:42,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711764374] [2021-10-11 02:32:42,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:42,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:32:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277802935] [2021-10-11 02:32:42,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:32:42,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:32:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:32:42,284 INFO L87 Difference]: Start difference. First operand 6 states and 5 transitions. Second operand 4 states. [2021-10-11 02:32:42,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:42,320 INFO L93 Difference]: Finished difference Result 5 states and 4 transitions. [2021-10-11 02:32:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:32:42,321 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2021-10-11 02:32:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:42,321 INFO L225 Difference]: With dead ends: 5 [2021-10-11 02:32:42,322 INFO L226 Difference]: Without dead ends: 5 [2021-10-11 02:32:42,322 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 02:32:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5 states. [2021-10-11 02:32:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5 to 5. [2021-10-11 02:32:42,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-10-11 02:32:42,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 4 transitions. [2021-10-11 02:32:42,325 INFO L78 Accepts]: Start accepts. Automaton has 5 states and 4 transitions. Word has length 3 [2021-10-11 02:32:42,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,326 INFO L481 AbstractCegarLoop]: Abstraction has 5 states and 4 transitions. [2021-10-11 02:32:42,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:32:42,326 INFO L276 IsEmpty]: Start isEmpty. Operand 5 states and 4 transitions. [2021-10-11 02:32:42,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-11 02:32:42,327 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:32:42,327 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-11 02:32:42,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:32:42,328 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:32:42,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:32:42,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1512320, now seen corresponding path program 1 times [2021-10-11 02:32:42,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:32:42,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423349146] [2021-10-11 02:32:42,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:32:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:32:42,396 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 02:32:42,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423349146] [2021-10-11 02:32:42,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:32:42,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:32:42,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251492013] [2021-10-11 02:32:42,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:32:42,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:32:42,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:32:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:32:42,401 INFO L87 Difference]: Start difference. First operand 5 states and 4 transitions. Second operand 3 states. [2021-10-11 02:32:42,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:32:42,412 INFO L93 Difference]: Finished difference Result 4 states and 3 transitions. [2021-10-11 02:32:42,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:32:42,415 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2021-10-11 02:32:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:32:42,416 INFO L225 Difference]: With dead ends: 4 [2021-10-11 02:32:42,416 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:32:42,417 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 02:32:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:32:42,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:32:42,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:32:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:32:42,418 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 4 [2021-10-11 02:32:42,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:32:42,419 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:32:42,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:32:42,419 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:32:42,419 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:32:42,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:32:42,424 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:32:42 BoogieIcfgContainer [2021-10-11 02:32:42,424 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:32:42,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:32:42,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:32:42,425 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:32:42,426 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:32:41" (3/4) ... [2021-10-11 02:32:42,429 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:32:42,443 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-11 02:32:42,444 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-11 02:32:42,444 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:32:42,444 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:32:42,475 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c5902bfa-ec79-4250-b0b6-ba63a51e7828/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:32:42,476 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:32:42,478 INFO L168 Benchmark]: Toolchain (without parser) took 1622.08 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 49.5 MB in the beginning and 47.3 MB in the end (delta: 2.2 MB). Peak memory consumption was 30.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:42,478 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:42,479 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.39 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 49.3 MB in the beginning and 96.0 MB in the end (delta: -46.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:42,479 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.77 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:42,480 INFO L168 Benchmark]: Boogie Preprocessor took 22.07 ms. Allocated memory is still 121.6 MB. Free memory was 94.6 MB in the beginning and 93.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:32:42,481 INFO L168 Benchmark]: RCFGBuilder took 459.94 ms. Allocated memory is still 121.6 MB. Free memory was 93.1 MB in the beginning and 89.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:42,481 INFO L168 Benchmark]: TraceAbstraction took 818.88 ms. Allocated memory is still 121.6 MB. Free memory was 89.2 MB in the beginning and 50.1 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:42,482 INFO L168 Benchmark]: Witness Printer took 50.83 ms. Allocated memory is still 121.6 MB. Free memory was 50.1 MB in the beginning and 47.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:32:42,485 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 92.3 MB. Free memory is still 65.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.39 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 49.3 MB in the beginning and 96.0 MB in the end (delta: -46.7 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.77 ms. Allocated memory is still 121.6 MB. Free memory was 96.0 MB in the beginning and 94.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.07 ms. Allocated memory is still 121.6 MB. Free memory was 94.6 MB in the beginning and 93.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 459.94 ms. Allocated memory is still 121.6 MB. Free memory was 93.1 MB in the beginning and 89.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 818.88 ms. Allocated memory is still 121.6 MB. Free memory was 89.2 MB in the beginning and 50.1 MB in the end (delta: 39.2 MB). Peak memory consumption was 39.8 MB. Max. memory is 16.1 GB. * Witness Printer took 50.83 ms. Allocated memory is still 121.6 MB. Free memory was 50.1 MB in the beginning and 47.3 MB in the end (delta: 2.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 6]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 18]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 5 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.7s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 10 SDtfs, 20 SDslu, 0 SDs, 0 SdLazy, 18 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 9 ConstructedInterpolants, 0 QuantifiedInterpolants, 95 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...