./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c --full-output --architecture 64bit -------------------------------------------------------------------------------- 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_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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 64bit --witnessprinter.graph.data.programhash 282a32bc5fb3d70423f87a450340f7a26ab0f093 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 02:25:38,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:25:38,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:25:38,275 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:25:38,276 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:25:38,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:25:38,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:25:38,288 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:25:38,290 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:25:38,296 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:25:38,297 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:25:38,301 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:25:38,302 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:25:38,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:25:38,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:25:38,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:25:38,310 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:25:38,315 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:25:38,317 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:25:38,324 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:25:38,327 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:25:38,329 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:25:38,333 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:25:38,334 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:25:38,344 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:25:38,345 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:25:38,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:25:38,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:25:38,349 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:25:38,351 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:25:38,351 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:25:38,352 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:25:38,354 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:25:38,355 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:25:38,357 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:25:38,357 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:25:38,358 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:25:38,358 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:25:38,359 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:25:38,360 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:25:38,360 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:25:38,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2021-10-11 02:25:38,404 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:25:38,405 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:25:38,406 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:25:38,407 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:25:38,407 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:25:38,407 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:25:38,407 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:25:38,408 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:25:38,408 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:25:38,408 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:25:38,409 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:25:38,410 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:25:38,410 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:25:38,410 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:25:38,410 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:25:38,411 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 02:25:38,411 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 02:25:38,412 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:25:38,412 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:25:38,412 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:25:38,412 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:25:38,413 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-11 02:25:38,413 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-11 02:25:38,413 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-11 02:25:38,413 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:25:38,413 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-11 02:25:38,415 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:25:38,415 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:25:38,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:25:38,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:25:38,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:25:38,417 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:25:38,417 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:25:38,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:25:38,417 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:25:38,418 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:25:38,418 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_de3b2cd3-b4d3-4f90-8c1f-181801227612/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 282a32bc5fb3d70423f87a450340f7a26ab0f093 [2021-10-11 02:25:38,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:25:38,712 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:25:38,714 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:25:38,716 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:25:38,717 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:25:38,718 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2021-10-11 02:25:38,803 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/data/919609f6f/5144af8c9e7b4515a6977f914f1c890f/FLAG116e8af99 [2021-10-11 02:25:39,359 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:25:39,360 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/sv-benchmarks/c/termination-crafted/Arrays03-ValueRestictsIndex-2.c [2021-10-11 02:25:39,370 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/data/919609f6f/5144af8c9e7b4515a6977f914f1c890f/FLAG116e8af99 [2021-10-11 02:25:39,691 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/data/919609f6f/5144af8c9e7b4515a6977f914f1c890f [2021-10-11 02:25:39,693 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:25:39,694 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:25:39,696 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:39,696 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:25:39,699 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:25:39,700 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:39,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@286fb59a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39, skipping insertion in model container [2021-10-11 02:25:39,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:39,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:25:39,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:25:39,908 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:39,917 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:25:39,939 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:25:39,960 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:25:39,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39 WrapperNode [2021-10-11 02:25:39,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:25:39,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:39,963 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:25:39,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:25:39,972 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:39,981 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:25:40,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:25:40,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:25:40,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:25:40,012 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,023 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... [2021-10-11 02:25:40,049 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:25:40,050 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:25:40,051 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:25:40,052 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:25:40,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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 02:25:40,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-11 02:25:40,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:25:40,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:25:40,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-11 02:25:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:25:40,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-11 02:25:40,599 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:25:40,599 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 02:25:40,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:40 BoogieIcfgContainer [2021-10-11 02:25:40,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:25:40,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:25:40,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:25:40,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:25:40,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:25:39" (1/3) ... [2021-10-11 02:25:40,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8f2b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:40, skipping insertion in model container [2021-10-11 02:25:40,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:25:39" (2/3) ... [2021-10-11 02:25:40,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d8f2b91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:25:40, skipping insertion in model container [2021-10-11 02:25:40,611 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:40" (3/3) ... [2021-10-11 02:25:40,612 INFO L111 eAbstractionObserver]: Analyzing ICFG Arrays03-ValueRestictsIndex-2.c [2021-10-11 02:25:40,625 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:25:40,629 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 7 error locations. [2021-10-11 02:25:40,640 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2021-10-11 02:25:40,670 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:25:40,670 INFO L378 AbstractCegarLoop]: Hoare is false [2021-10-11 02:25:40,670 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:25:40,670 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:25:40,671 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:25:40,671 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:25:40,671 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:25:40,671 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:25:40,689 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:25:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:25:40,696 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:40,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:25:40,698 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:40,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:40,704 INFO L82 PathProgramCache]: Analyzing trace with hash 90656, now seen corresponding path program 1 times [2021-10-11 02:25:40,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:40,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499423245] [2021-10-11 02:25:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:40,892 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 02:25:40,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499423245] [2021-10-11 02:25:40,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:40,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:25:40,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187590132] [2021-10-11 02:25:40,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:40,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:40,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:40,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:40,920 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:25:40,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:40,999 INFO L93 Difference]: Finished difference Result 16 states and 20 transitions. [2021-10-11 02:25:40,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:41,001 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:25:41,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:41,009 INFO L225 Difference]: With dead ends: 16 [2021-10-11 02:25:41,009 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 02:25:41,011 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 02:25:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 02:25:41,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 02:25:41,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:25:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-10-11 02:25:41,042 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 3 [2021-10-11 02:25:41,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:41,043 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-10-11 02:25:41,043 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:41,043 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-10-11 02:25:41,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-11 02:25:41,044 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:41,044 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-11 02:25:41,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:25:41,044 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:41,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:41,045 INFO L82 PathProgramCache]: Analyzing trace with hash 90657, now seen corresponding path program 1 times [2021-10-11 02:25:41,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:41,046 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042284198] [2021-10-11 02:25:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:41,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:41,160 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 02:25:41,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042284198] [2021-10-11 02:25:41,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:41,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:25:41,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075282778] [2021-10-11 02:25:41,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:41,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:41,164 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand 3 states. [2021-10-11 02:25:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:41,193 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2021-10-11 02:25:41,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:41,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2021-10-11 02:25:41,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:41,195 INFO L225 Difference]: With dead ends: 17 [2021-10-11 02:25:41,195 INFO L226 Difference]: Without dead ends: 17 [2021-10-11 02:25:41,196 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 02:25:41,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-11 02:25:41,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-11 02:25:41,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 02:25:41,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-11 02:25:41,200 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 3 [2021-10-11 02:25:41,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:41,201 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-11 02:25:41,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:41,201 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-11 02:25:41,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:25:41,202 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:41,202 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2021-10-11 02:25:41,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:25:41,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 87172633, now seen corresponding path program 1 times [2021-10-11 02:25:41,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:41,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432627657] [2021-10-11 02:25:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:41,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:41,294 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 02:25:41,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432627657] [2021-10-11 02:25:41,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009607313] [2021-10-11 02:25:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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 02:25:41,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:41,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-11 02:25:41,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:41,442 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 02:25:41,443 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-11 02:25:41,451 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-11 02:25:41,452 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-11 02:25:41,452 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:13, output treesize:12 [2021-10-11 02:25:41,471 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 02:25:41,471 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:41,530 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 02:25:41,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1329773479] [2021-10-11 02:25:41,556 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2021-10-11 02:25:41,557 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:25:41,562 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:25:41,568 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:25:41,569 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:25:42,106 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:25:42,228 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-10-11 02:25:42,383 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:25:42,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:25:42,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 4 [2021-10-11 02:25:42,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729807502] [2021-10-11 02:25:42,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:25:42,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:25:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-10-11 02:25:42,385 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 6 states. [2021-10-11 02:25:42,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:42,515 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-10-11 02:25:42,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:25:42,515 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 5 [2021-10-11 02:25:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:42,518 INFO L225 Difference]: With dead ends: 41 [2021-10-11 02:25:42,518 INFO L226 Difference]: Without dead ends: 41 [2021-10-11 02:25:42,520 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-10-11 02:25:42,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-11 02:25:42,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 23. [2021-10-11 02:25:42,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-10-11 02:25:42,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2021-10-11 02:25:42,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 5 [2021-10-11 02:25:42,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:42,528 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2021-10-11 02:25:42,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:25:42,528 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2021-10-11 02:25:42,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 02:25:42,529 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:42,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2021-10-11 02:25:42,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 02:25:42,755 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:42,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:42,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1493658438, now seen corresponding path program 1 times [2021-10-11 02:25:42,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:42,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552965857] [2021-10-11 02:25:42,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:42,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:42,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 02:25:42,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552965857] [2021-10-11 02:25:42,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:42,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-11 02:25:42,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822393428] [2021-10-11 02:25:42,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:25:42,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:42,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:25:42,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:25:42,796 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand 3 states. [2021-10-11 02:25:42,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:42,809 INFO L93 Difference]: Finished difference Result 22 states and 28 transitions. [2021-10-11 02:25:42,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:25:42,810 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 02:25:42,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:42,811 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:25:42,811 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:25:42,811 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 02:25:42,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:25:42,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-11 02:25:42,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:25:42,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-10-11 02:25:42,814 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 8 [2021-10-11 02:25:42,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:42,815 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-10-11 02:25:42,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:25:42,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-10-11 02:25:42,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 02:25:42,816 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:42,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2021-10-11 02:25:42,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-10-11 02:25:42,816 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 941262435, now seen corresponding path program 1 times [2021-10-11 02:25:42,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:42,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087528016] [2021-10-11 02:25:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:42,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:42,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087528016] [2021-10-11 02:25:42,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408130713] [2021-10-11 02:25:42,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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 02:25:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:42,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 02:25:42,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:42,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:42,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [991956816] [2021-10-11 02:25:43,001 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-11 02:25:43,001 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:25:43,002 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:25:43,002 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:25:43,003 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:25:43,341 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:25:43,635 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-11 02:25:43,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:25:43,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-10-11 02:25:43,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228362448] [2021-10-11 02:25:43,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:25:43,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:43,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:25:43,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:25:43,642 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 8 states. [2021-10-11 02:25:43,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:43,683 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2021-10-11 02:25:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:25:43,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2021-10-11 02:25:43,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:43,685 INFO L225 Difference]: With dead ends: 26 [2021-10-11 02:25:43,685 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:25:43,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-11 02:25:43,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:25:43,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-11 02:25:43,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:25:43,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-11 02:25:43,694 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 9 [2021-10-11 02:25:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:43,694 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-11 02:25:43,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:25:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-11 02:25:43,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 02:25:43,702 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:43,702 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1] [2021-10-11 02:25:43,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:25:43,924 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:43,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:43,924 INFO L82 PathProgramCache]: Analyzing trace with hash 928759297, now seen corresponding path program 2 times [2021-10-11 02:25:43,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:43,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148828965] [2021-10-11 02:25:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:44,029 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:44,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148828965] [2021-10-11 02:25:44,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:44,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-10-11 02:25:44,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023229713] [2021-10-11 02:25:44,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 02:25:44,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:44,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 02:25:44,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:25:44,032 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 8 states. [2021-10-11 02:25:44,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:44,083 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-11 02:25:44,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 02:25:44,083 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-10-11 02:25:44,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:44,085 INFO L225 Difference]: With dead ends: 24 [2021-10-11 02:25:44,085 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:25:44,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:25:44,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:25:44,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-11 02:25:44,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 02:25:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-11 02:25:44,095 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2021-10-11 02:25:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:44,096 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-11 02:25:44,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 02:25:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-11 02:25:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-11 02:25:44,097 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:44,097 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2021-10-11 02:25:44,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-10-11 02:25:44,097 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:44,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:44,098 INFO L82 PathProgramCache]: Analyzing trace with hash 611875395, now seen corresponding path program 2 times [2021-10-11 02:25:44,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:44,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588992635] [2021-10-11 02:25:44,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:25:44,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588992635] [2021-10-11 02:25:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303026582] [2021-10-11 02:25:44,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/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 02:25:44,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2021-10-11 02:25:44,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 02:25:44,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 02:25:44,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:25:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:25:44,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:25:44,469 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:25:44,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-10-11 02:25:44,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [8] total 12 [2021-10-11 02:25:44,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201296979] [2021-10-11 02:25:44,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:25:44,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:44,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:25:44,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:25:44,472 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 6 states. [2021-10-11 02:25:44,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:44,554 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-10-11 02:25:44,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:25:44,554 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2021-10-11 02:25:44,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:44,555 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:25:44,555 INFO L226 Difference]: Without dead ends: 19 [2021-10-11 02:25:44,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-10-11 02:25:44,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-11 02:25:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-11 02:25:44,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:25:44,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-11 02:25:44,559 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-10-11 02:25:44,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:44,560 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-11 02:25:44,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:25:44,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-11 02:25:44,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 02:25:44,560 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:25:44,561 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-10-11 02:25:44,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-11 02:25:44,775 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2021-10-11 02:25:44,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:25:44,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1787263848, now seen corresponding path program 1 times [2021-10-11 02:25:44,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:25:44,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294097878] [2021-10-11 02:25:44,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:25:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:25:44,823 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-10-11 02:25:44,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294097878] [2021-10-11 02:25:44,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:25:44,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:25:44,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955172862] [2021-10-11 02:25:44,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:25:44,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:25:44,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:25:44,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:44,825 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 4 states. [2021-10-11 02:25:44,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:25:44,832 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-11 02:25:44,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:25:44,832 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2021-10-11 02:25:44,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:25:44,833 INFO L225 Difference]: With dead ends: 18 [2021-10-11 02:25:44,833 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:25:44,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:25:44,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:25:44,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:25:44,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:25:44,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:25:44,834 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-11 02:25:44,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:25:44,834 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:25:44,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:25:44,834 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:25:44,834 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:25:44,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-10-11 02:25:44,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:25:44 BoogieIcfgContainer [2021-10-11 02:25:44,838 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:25:44,839 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:25:44,839 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:25:44,839 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:25:44,839 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:25:40" (3/4) ... [2021-10-11 02:25:44,842 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:25:44,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-11 02:25:44,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 02:25:44,850 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-11 02:25:44,892 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_de3b2cd3-b4d3-4f90-8c1f-181801227612/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:25:44,892 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:25:44,894 INFO L168 Benchmark]: Toolchain (without parser) took 5198.32 ms. Allocated memory was 125.8 MB in the beginning and 213.9 MB in the end (delta: 88.1 MB). Free memory was 99.2 MB in the beginning and 133.1 MB in the end (delta: -33.9 MB). Peak memory consumption was 53.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:44,894 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory was 83.2 MB in the beginning and 83.1 MB in the end (delta: 61.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:44,894 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.69 ms. Allocated memory was 125.8 MB in the beginning and 178.3 MB in the end (delta: 52.4 MB). Free memory was 99.2 MB in the beginning and 152.0 MB in the end (delta: -52.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:44,895 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.22 ms. Allocated memory is still 178.3 MB. Free memory was 152.0 MB in the beginning and 150.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:44,895 INFO L168 Benchmark]: Boogie Preprocessor took 45.75 ms. Allocated memory is still 178.3 MB. Free memory was 150.4 MB in the beginning and 149.5 MB in the end (delta: 939.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:25:44,896 INFO L168 Benchmark]: RCFGBuilder took 551.40 ms. Allocated memory is still 178.3 MB. Free memory was 149.5 MB in the beginning and 131.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:44,896 INFO L168 Benchmark]: TraceAbstraction took 4235.09 ms. Allocated memory was 178.3 MB in the beginning and 213.9 MB in the end (delta: 35.7 MB). Free memory was 130.6 MB in the beginning and 136.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:44,896 INFO L168 Benchmark]: Witness Printer took 53.81 ms. Allocated memory is still 213.9 MB. Free memory was 135.2 MB in the beginning and 133.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 02:25:44,901 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 125.8 MB. Free memory was 83.2 MB in the beginning and 83.1 MB in the end (delta: 61.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.69 ms. Allocated memory was 125.8 MB in the beginning and 178.3 MB in the end (delta: 52.4 MB). Free memory was 99.2 MB in the beginning and 152.0 MB in the end (delta: -52.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.22 ms. Allocated memory is still 178.3 MB. Free memory was 152.0 MB in the beginning and 150.9 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.75 ms. Allocated memory is still 178.3 MB. Free memory was 150.4 MB in the beginning and 149.5 MB in the end (delta: 939.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 551.40 ms. Allocated memory is still 178.3 MB. Free memory was 149.5 MB in the beginning and 131.1 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4235.09 ms. Allocated memory was 178.3 MB in the beginning and 213.9 MB in the end (delta: 35.7 MB). Free memory was 130.6 MB in the beginning and 136.2 MB in the end (delta: -5.6 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. * Witness Printer took 53.81 ms. Allocated memory is still 213.9 MB. Free memory was 135.2 MB in the beginning and 133.1 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: - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 16]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 11]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 7 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 6, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 158 SDslu, 141 SDs, 0 SdLazy, 149 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 19 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 105 NumberOfCodeBlocks, 93 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 122 ConstructedInterpolants, 1 QuantifiedInterpolants, 13498 SizeOfPredicates, 0 NumberOfNonLiveVariables, 106 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 14 InterpolantComputations, 7 PerfectInterpolantSequences, 132/186 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...