./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/functions_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-acceleration/functions_1-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 99767e91eb3b725d4103580e07b56585ddcb04d4 ........................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:29:13,124 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:29:13,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:29:13,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:29:13,197 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:29:13,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:29:13,201 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:29:13,203 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:29:13,226 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:29:13,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:29:13,230 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:29:13,231 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:29:13,232 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:29:13,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:29:13,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:29:13,241 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:29:13,242 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:29:13,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:29:13,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:29:13,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:29:13,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:29:13,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:29:13,267 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:29:13,268 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:29:13,278 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:29:13,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:29:13,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:29:13,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:29:13,281 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:29:13,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:29:13,284 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:29:13,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:29:13,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:29:13,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:29:13,293 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:29:13,295 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:29:13,296 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:29:13,296 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:29:13,296 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:29:13,297 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:29:13,298 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:29:13,302 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-11-30 02:29:13,330 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:29:13,331 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:29:13,332 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:29:13,332 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:29:13,332 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:29:13,332 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:29:13,333 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:29:13,333 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:29:13,333 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:29:13,333 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:29:13,333 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:29:13,334 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:29:13,334 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:29:13,334 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:29:13,334 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:29:13,335 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:29:13,335 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:29:13,336 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:29:13,336 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:29:13,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:29:13,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 02:29:13,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:29:13,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 02:29:13,338 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:29:13,338 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:29:13,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 02:29:13,338 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:29:13,339 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 02:29:13,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:29:13,341 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:29:13,341 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:29:13,341 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:29:13,342 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:29:13,342 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:29:13,342 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 02:29:13,343 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:29:13,344 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:29:13,344 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 02:29:13,344 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:29:13,344 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:29:13,345 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 99767e91eb3b725d4103580e07b56585ddcb04d4 [2020-11-30 02:29:13,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:29:13,739 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:29:13,743 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:29:13,744 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:29:13,745 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:29:13,746 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/../../sv-benchmarks/c/loop-acceleration/functions_1-1.c [2020-11-30 02:29:13,826 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/data/d882f66a5/3e148b49b8d540b1a3acb7c8511fa456/FLAG52784adf4 [2020-11-30 02:29:14,389 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:29:14,390 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/sv-benchmarks/c/loop-acceleration/functions_1-1.c [2020-11-30 02:29:14,401 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/data/d882f66a5/3e148b49b8d540b1a3acb7c8511fa456/FLAG52784adf4 [2020-11-30 02:29:14,758 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/data/d882f66a5/3e148b49b8d540b1a3acb7c8511fa456 [2020-11-30 02:29:14,768 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:29:14,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:29:14,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:14,775 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:29:14,778 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:29:14,779 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:14" (1/1) ... [2020-11-30 02:29:14,782 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4128537c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:14, skipping insertion in model container [2020-11-30 02:29:14,782 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:29:14" (1/1) ... [2020-11-30 02:29:14,790 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:29:14,805 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:29:15,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:15,010 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:29:15,024 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:29:15,039 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:29:15,040 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15 WrapperNode [2020-11-30 02:29:15,040 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:29:15,041 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:15,042 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:29:15,042 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:29:15,051 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,058 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:29:15,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:29:15,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:29:15,077 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:29:15,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,086 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,090 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,094 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... [2020-11-30 02:29:15,096 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:29:15,097 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:29:15,097 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:29:15,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:29:15,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:29:15,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:29:15,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:29:15,196 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:29:15,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:29:15,677 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:29:15,677 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-11-30 02:29:15,679 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:15 BoogieIcfgContainer [2020-11-30 02:29:15,679 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:29:15,681 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:29:15,681 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:29:15,687 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:29:15,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:29:14" (1/3) ... [2020-11-30 02:29:15,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afc0003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:15, skipping insertion in model container [2020-11-30 02:29:15,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:29:15" (2/3) ... [2020-11-30 02:29:15,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6afc0003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:29:15, skipping insertion in model container [2020-11-30 02:29:15,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:15" (3/3) ... [2020-11-30 02:29:15,691 INFO L111 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2020-11-30 02:29:15,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:29:15,707 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 02:29:15,720 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 02:29:15,761 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:29:15,761 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 02:29:15,761 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:29:15,761 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:29:15,762 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:29:15,762 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:29:15,762 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:29:15,762 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:29:15,777 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states. [2020-11-30 02:29:15,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:29:15,783 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:15,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:29:15,785 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:15,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:15,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1943784, now seen corresponding path program 1 times [2020-11-30 02:29:15,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:15,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759541555] [2020-11-30 02:29:15,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:15,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:16,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759541555] [2020-11-30 02:29:16,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:29:16,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:29:16,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69417389] [2020-11-30 02:29:16,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:29:16,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:16,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:29:16,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:29:16,081 INFO L87 Difference]: Start difference. First operand 7 states. Second operand 4 states. [2020-11-30 02:29:16,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:16,136 INFO L93 Difference]: Finished difference Result 13 states and 15 transitions. [2020-11-30 02:29:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:29:16,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 4 [2020-11-30 02:29:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:16,158 INFO L225 Difference]: With dead ends: 13 [2020-11-30 02:29:16,158 INFO L226 Difference]: Without dead ends: 6 [2020-11-30 02:29:16,161 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:29:16,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2020-11-30 02:29:16,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2020-11-30 02:29:16,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2020-11-30 02:29:16,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2020-11-30 02:29:16,199 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 4 [2020-11-30 02:29:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:16,200 INFO L481 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2020-11-30 02:29:16,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:29:16,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2020-11-30 02:29:16,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:29:16,201 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:29:16,201 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:29:16,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:29:16,202 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 02:29:16,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:29:16,204 INFO L82 PathProgramCache]: Analyzing trace with hash 60155398, now seen corresponding path program 1 times [2020-11-30 02:29:16,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:29:16,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745155747] [2020-11-30 02:29:16,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:29:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:16,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745155747] [2020-11-30 02:29:16,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922861499] [2020-11-30 02:29:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:29:16,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:29:16,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:29:16,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:29:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:16,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:29:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:29:16,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [446245179] [2020-11-30 02:29:16,620 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-30 02:29:16,620 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:29:16,625 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:29:16,631 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:29:16,631 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:29:17,137 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:29:17,272 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-11-30 02:29:17,495 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:29:17,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:29:17,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2020-11-30 02:29:17,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319143789] [2020-11-30 02:29:17,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:29:17,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:29:17,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:29:17,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:29:17,498 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand 8 states. [2020-11-30 02:29:19,623 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 19 [2020-11-30 02:29:19,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:29:19,821 INFO L93 Difference]: Finished difference Result 10 states and 13 transitions. [2020-11-30 02:29:19,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:29:19,821 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 5 [2020-11-30 02:29:19,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:29:19,822 INFO L225 Difference]: With dead ends: 10 [2020-11-30 02:29:19,822 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:29:19,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-11-30 02:29:19,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:29:19,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:29:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:29:19,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:29:19,824 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 5 [2020-11-30 02:29:19,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:29:19,824 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:29:19,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:29:19,824 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:29:19,825 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:29:20,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-11-30 02:29:20,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-30 02:29:20,067 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-30 02:29:20,068 INFO L270 CegarLoopResult]: At program point L19-2(lines 19 21) the Hoare annotation is: (or (let ((.cse0 (div ULTIMATE.start_main_~x~0 2))) (and (< 0 .cse0) (<= ULTIMATE.start_main_~x~0 (* 2 .cse0)))) (= ULTIMATE.start_main_~x~0 0)) [2020-11-30 02:29:20,068 INFO L274 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-11-30 02:29:20,068 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-30 02:29:20,068 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2020-11-30 02:29:20,068 INFO L274 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2020-11-30 02:29:20,068 INFO L270 CegarLoopResult]: At program point L6-2(lines 1 24) the Hoare annotation is: (not (= 0 ULTIMATE.start___VERIFIER_assert_~cond)) [2020-11-30 02:29:20,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:29:20 BoogieIcfgContainer [2020-11-30 02:29:20,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:29:20,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:29:20,087 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:29:20,088 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:29:20,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:29:15" (3/4) ... [2020-11-30 02:29:20,091 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:29:20,100 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-11-30 02:29:20,101 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-11-30 02:29:20,101 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:29:20,101 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-30 02:29:20,151 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_863d852c-d642-47db-9404-a42875df8608/bin/utaipan/witness.graphml [2020-11-30 02:29:20,152 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:29:20,153 INFO L168 Benchmark]: Toolchain (without parser) took 5382.54 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 63.9 MB in the beginning and 91.1 MB in the end (delta: -27.2 MB). Peak memory consumption was 3.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,153 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 98.6 MB. Free memory was 71.9 MB in the beginning and 71.9 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:20,154 INFO L168 Benchmark]: CACSL2BoogieTranslator took 266.15 ms. Allocated memory is still 98.6 MB. Free memory was 63.7 MB in the beginning and 75.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,154 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.31 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:29:20,155 INFO L168 Benchmark]: Boogie Preprocessor took 20.17 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.6 MB in the end (delta: 876.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,156 INFO L168 Benchmark]: RCFGBuilder took 582.35 ms. Allocated memory is still 98.6 MB. Free memory was 73.6 MB in the beginning and 60.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,156 INFO L168 Benchmark]: TraceAbstraction took 4405.78 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 60.1 MB in the beginning and 93.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 100.0 kB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,157 INFO L168 Benchmark]: Witness Printer took 64.43 ms. Allocated memory is still 130.0 MB. Free memory was 93.2 MB in the beginning and 91.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:29:20,165 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 98.6 MB. Free memory was 71.9 MB in the beginning and 71.9 MB in the end (delta: 27.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 266.15 ms. Allocated memory is still 98.6 MB. Free memory was 63.7 MB in the beginning and 75.7 MB in the end (delta: -12.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.31 ms. Allocated memory is still 98.6 MB. Free memory was 75.7 MB in the beginning and 74.4 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.17 ms. Allocated memory is still 98.6 MB. Free memory was 74.4 MB in the beginning and 73.6 MB in the end (delta: 876.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 582.35 ms. Allocated memory is still 98.6 MB. Free memory was 73.6 MB in the beginning and 60.5 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4405.78 ms. Allocated memory was 98.6 MB in the beginning and 130.0 MB in the end (delta: 31.5 MB). Free memory was 60.1 MB in the beginning and 93.2 MB in the end (delta: -33.1 MB). Peak memory consumption was 100.0 kB. Max. memory is 16.1 GB. * Witness Printer took 64.43 ms. Allocated memory is still 130.0 MB. Free memory was 93.2 MB in the beginning and 91.1 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: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (0 < x / 2 && x <= 2 * (x / 2)) || x == 0 - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 7 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 2.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7 SDtfs, 2 SDslu, 7 SDs, 0 SdLazy, 21 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 2.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7occurred 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, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 21 HoareAnnotationTreeSize, 2 FomulaSimplifications, 47 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 3 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 15 ConstructedInterpolants, 0 QuantifiedInterpolants, 212 SizeOfPredicates, 4 NumberOfNonLiveVariables, 50 ConjunctsInSsa, 11 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/3 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...