./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 16:54:13,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 16:54:13,295 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 16:54:13,332 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 16:54:13,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 16:54:13,334 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 16:54:13,335 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 16:54:13,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 16:54:13,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 16:54:13,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 16:54:13,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 16:54:13,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 16:54:13,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 16:54:13,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 16:54:13,343 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 16:54:13,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 16:54:13,344 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 16:54:13,345 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 16:54:13,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 16:54:13,348 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 16:54:13,349 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 16:54:13,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 16:54:13,352 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 16:54:13,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 16:54:13,355 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 16:54:13,355 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 16:54:13,355 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 16:54:13,356 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 16:54:13,356 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 16:54:13,357 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 16:54:13,358 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 16:54:13,358 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 16:54:13,359 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 16:54:13,360 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 16:54:13,361 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 16:54:13,361 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 16:54:13,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 16:54:13,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 16:54:13,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 16:54:13,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 16:54:13,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 16:54:13,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/config/svcomp-Overflow-32bit-Taipan_Default.epf [2020-12-09 16:54:13,388 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 16:54:13,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 16:54:13,389 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 16:54:13,389 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 16:54:13,389 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 16:54:13,389 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 16:54:13,390 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 16:54:13,390 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 16:54:13,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 16:54:13,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 16:54:13,391 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 16:54:13,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 16:54:13,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 16:54:13,391 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 16:54:13,392 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 16:54:13,392 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 16:54:13,393 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 16:54:13,393 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 16:54:13,394 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_face287f-81a9-4c87-b0cf-44232cea9aae/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2020-12-09 16:54:13,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 16:54:13,619 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 16:54:13,621 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 16:54:13,621 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 16:54:13,622 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 16:54:13,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/../../sv-benchmarks/c/bitvector/gcd_4.c [2020-12-09 16:54:13,663 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/data/67aa87111/77052407ef714d42b8d64549ed021ca3/FLAG2ebf35ec9 [2020-12-09 16:54:14,024 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 16:54:14,025 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/sv-benchmarks/c/bitvector/gcd_4.c [2020-12-09 16:54:14,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/data/67aa87111/77052407ef714d42b8d64549ed021ca3/FLAG2ebf35ec9 [2020-12-09 16:54:14,040 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/data/67aa87111/77052407ef714d42b8d64549ed021ca3 [2020-12-09 16:54:14,042 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 16:54:14,043 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 16:54:14,045 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 16:54:14,045 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 16:54:14,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 16:54:14,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,049 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70982ac1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14, skipping insertion in model container [2020-12-09 16:54:14,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 16:54:14,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 16:54:14,179 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2020-12-09 16:54:14,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:54:14,193 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 16:54:14,202 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2020-12-09 16:54:14,206 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 16:54:14,215 INFO L208 MainTranslator]: Completed translation [2020-12-09 16:54:14,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14 WrapperNode [2020-12-09 16:54:14,215 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 16:54:14,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 16:54:14,216 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 16:54:14,216 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 16:54:14,221 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,226 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,239 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 16:54:14,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 16:54:14,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 16:54:14,240 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 16:54:14,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,247 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,247 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,249 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,252 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,253 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... [2020-12-09 16:54:14,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 16:54:14,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 16:54:14,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 16:54:14,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 16:54:14,255 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/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 [2020-12-09 16:54:14,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 16:54:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 16:54:14,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 16:54:14,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 16:54:14,574 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 16:54:14,574 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-09 16:54:14,576 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:54:14 BoogieIcfgContainer [2020-12-09 16:54:14,576 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 16:54:14,577 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 16:54:14,577 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 16:54:14,579 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 16:54:14,579 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 04:54:14" (1/3) ... [2020-12-09 16:54:14,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e11f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:54:14, skipping insertion in model container [2020-12-09 16:54:14,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 04:54:14" (2/3) ... [2020-12-09 16:54:14,580 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@17e11f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 04:54:14, skipping insertion in model container [2020-12-09 16:54:14,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:54:14" (3/3) ... [2020-12-09 16:54:14,581 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2020-12-09 16:54:14,593 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 16:54:14,595 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 8 error locations. [2020-12-09 16:54:14,602 INFO L253 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2020-12-09 16:54:14,619 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 16:54:14,619 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 16:54:14,619 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 16:54:14,619 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 16:54:14,619 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 16:54:14,619 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 16:54:14,619 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 16:54:14,619 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 16:54:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-12-09 16:54:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-12-09 16:54:14,632 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:14,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-12-09 16:54:14,633 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:14,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:14,636 INFO L82 PathProgramCache]: Analyzing trace with hash 116442, now seen corresponding path program 1 times [2020-12-09 16:54:14,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:14,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609498295] [2020-12-09 16:54:14,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:14,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:14,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609498295] [2020-12-09 16:54:14,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:54:14,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:54:14,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798689312] [2020-12-09 16:54:14,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:54:14,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:14,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:54:14,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:54:14,768 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2020-12-09 16:54:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:14,811 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-12-09 16:54:14,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:54:14,812 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-12-09 16:54:14,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:14,818 INFO L225 Difference]: With dead ends: 54 [2020-12-09 16:54:14,818 INFO L226 Difference]: Without dead ends: 28 [2020-12-09 16:54:14,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:54:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-09 16:54:14,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 18. [2020-12-09 16:54:14,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 16:54:14,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-12-09 16:54:14,842 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 3 [2020-12-09 16:54:14,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:14,843 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-12-09 16:54:14,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:54:14,843 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-12-09 16:54:14,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 16:54:14,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:14,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 16:54:14,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 16:54:14,849 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash 3615763, now seen corresponding path program 1 times [2020-12-09 16:54:14,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:14,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793401032] [2020-12-09 16:54:14,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:14,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:14,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793401032] [2020-12-09 16:54:14,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:54:14,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 16:54:14,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835252852] [2020-12-09 16:54:14,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:54:14,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:14,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:54:14,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:54:14,875 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 3 states. [2020-12-09 16:54:14,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:14,904 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-12-09 16:54:14,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:54:14,905 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-12-09 16:54:14,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:14,905 INFO L225 Difference]: With dead ends: 39 [2020-12-09 16:54:14,906 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 16:54:14,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:54:14,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 16:54:14,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 14. [2020-12-09 16:54:14,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 16:54:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 16:54:14,910 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 4 [2020-12-09 16:54:14,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:14,910 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 16:54:14,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:54:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 16:54:14,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 16:54:14,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:14,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:14,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 16:54:14,912 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:14,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:14,912 INFO L82 PathProgramCache]: Analyzing trace with hash 348917805, now seen corresponding path program 1 times [2020-12-09 16:54:14,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:14,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398396724] [2020-12-09 16:54:14,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:14,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:14,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398396724] [2020-12-09 16:54:14,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 16:54:14,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 16:54:14,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931587539] [2020-12-09 16:54:14,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 16:54:14,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:14,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 16:54:14,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 16:54:14,955 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-12-09 16:54:14,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:14,980 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-12-09 16:54:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 16:54:14,981 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-09 16:54:14,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:14,982 INFO L225 Difference]: With dead ends: 28 [2020-12-09 16:54:14,982 INFO L226 Difference]: Without dead ends: 18 [2020-12-09 16:54:14,982 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 [2020-12-09 16:54:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-09 16:54:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-12-09 16:54:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-12-09 16:54:14,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-12-09 16:54:14,986 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2020-12-09 16:54:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:14,986 INFO L481 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-12-09 16:54:14,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 16:54:14,987 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-12-09 16:54:14,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:54:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:14,987 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:14,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 16:54:14,988 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:14,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:14,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1293917912, now seen corresponding path program 1 times [2020-12-09 16:54:14,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:14,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497238054] [2020-12-09 16:54:14,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497238054] [2020-12-09 16:54:15,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138246284] [2020-12-09 16:54:15,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/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 [2020-12-09 16:54:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:15,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 16:54:15,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:15,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:15,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:54:15,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2, 2] total 6 [2020-12-09 16:54:15,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414580897] [2020-12-09 16:54:15,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 16:54:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 16:54:15,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:54:15,184 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 4 states. [2020-12-09 16:54:15,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:15,229 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2020-12-09 16:54:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:54:15,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-09 16:54:15,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:15,230 INFO L225 Difference]: With dead ends: 28 [2020-12-09 16:54:15,230 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 16:54:15,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-09 16:54:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 16:54:15,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-12-09 16:54:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-09 16:54:15,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-12-09 16:54:15,234 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 11 [2020-12-09 16:54:15,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:15,234 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-12-09 16:54:15,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 16:54:15,234 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-12-09 16:54:15,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 16:54:15,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:15,234 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:15,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:15,437 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:15,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:15,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1293917720, now seen corresponding path program 1 times [2020-12-09 16:54:15,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:15,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391502829] [2020-12-09 16:54:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391502829] [2020-12-09 16:54:15,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588780967] [2020-12-09 16:54:15,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/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 [2020-12-09 16:54:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:15,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 16:54:15,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:15,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1203960749] [2020-12-09 16:54:15,744 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-12-09 16:54:15,744 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:54:15,748 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:54:15,753 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:54:15,753 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:54:16,055 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:54:16,179 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-12-09 16:54:16,311 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-09 16:54:16,586 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 39 [2020-12-09 16:54:16,754 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-12-09 16:54:16,756 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:54:16,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:54:16,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2020-12-09 16:54:16,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484229657] [2020-12-09 16:54:16,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 16:54:16,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:16,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 16:54:16,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-09 16:54:16,758 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 8 states. [2020-12-09 16:54:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:16,824 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-12-09 16:54:16,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:54:16,824 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-09 16:54:16,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:16,826 INFO L225 Difference]: With dead ends: 48 [2020-12-09 16:54:16,826 INFO L226 Difference]: Without dead ends: 36 [2020-12-09 16:54:16,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 16:54:16,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-12-09 16:54:16,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-12-09 16:54:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 16:54:16,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-12-09 16:54:16,831 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 11 [2020-12-09 16:54:16,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:16,831 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-12-09 16:54:16,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 16:54:16,831 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-12-09 16:54:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 16:54:16,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:16,832 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:17,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:17,033 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:17,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:17,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1299235432, now seen corresponding path program 1 times [2020-12-09 16:54:17,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:17,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472475180] [2020-12-09 16:54:17,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:17,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:17,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:17,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472475180] [2020-12-09 16:54:17,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500277144] [2020-12-09 16:54:17,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/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 [2020-12-09 16:54:17,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:17,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-09 16:54:17,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:17,270 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:17,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:17,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1381353460] [2020-12-09 16:54:17,322 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:54:17,322 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:54:17,322 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:54:17,322 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:54:17,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:54:17,689 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:54:18,413 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:54:18,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:54:18,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2020-12-09 16:54:18,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786885736] [2020-12-09 16:54:18,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 16:54:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 16:54:18,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-09 16:54:18,415 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 11 states. [2020-12-09 16:54:18,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:18,456 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-12-09 16:54:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 16:54:18,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 19 [2020-12-09 16:54:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:18,457 INFO L225 Difference]: With dead ends: 45 [2020-12-09 16:54:18,457 INFO L226 Difference]: Without dead ends: 34 [2020-12-09 16:54:18,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2020-12-09 16:54:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-09 16:54:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-12-09 16:54:18,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-09 16:54:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-12-09 16:54:18,460 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 19 [2020-12-09 16:54:18,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:18,461 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-12-09 16:54:18,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 16:54:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-12-09 16:54:18,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 16:54:18,461 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:18,461 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:18,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-09 16:54:18,663 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:18,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:18,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1802595367, now seen corresponding path program 2 times [2020-12-09 16:54:18,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:18,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706825247] [2020-12-09 16:54:18,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:18,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:18,754 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 22 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:18,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706825247] [2020-12-09 16:54:18,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260605726] [2020-12-09 16:54:18,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:18,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 16:54:18,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:54:18,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:54:18,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 16:54:18,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:18,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 16:54:18,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 16:54:18,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 11 [2020-12-09 16:54:18,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256178421] [2020-12-09 16:54:18,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 16:54:18,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:18,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 16:54:18,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-09 16:54:18,854 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 5 states. [2020-12-09 16:54:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:18,876 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-12-09 16:54:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 16:54:18,876 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-12-09 16:54:18,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:18,877 INFO L225 Difference]: With dead ends: 34 [2020-12-09 16:54:18,877 INFO L226 Difference]: Without dead ends: 33 [2020-12-09 16:54:18,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-12-09 16:54:18,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-12-09 16:54:18,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2020-12-09 16:54:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-12-09 16:54:18,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-12-09 16:54:18,880 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2020-12-09 16:54:18,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:18,880 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-12-09 16:54:18,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 16:54:18,880 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-12-09 16:54:18,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-09 16:54:18,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:18,881 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 16:54:19,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:19,082 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:19,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:19,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1625100781, now seen corresponding path program 2 times [2020-12-09 16:54:19,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:19,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012910464] [2020-12-09 16:54:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:19,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 16:54:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012910464] [2020-12-09 16:54:19,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345098408] [2020-12-09 16:54:19,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:19,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-09 16:54:19,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:54:19,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 16:54:19,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 16:54:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-09 16:54:19,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [376628291] [2020-12-09 16:54:19,229 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:54:19,230 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:54:19,230 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:54:19,230 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:54:19,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:54:19,453 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:54:20,149 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:54:20,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:54:20,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2020-12-09 16:54:20,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713993675] [2020-12-09 16:54:20,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 16:54:20,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:20,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 16:54:20,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2020-12-09 16:54:20,151 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 11 states. [2020-12-09 16:54:20,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:20,303 INFO L93 Difference]: Finished difference Result 55 states and 68 transitions. [2020-12-09 16:54:20,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 16:54:20,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-12-09 16:54:20,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:20,304 INFO L225 Difference]: With dead ends: 55 [2020-12-09 16:54:20,304 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 16:54:20,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2020-12-09 16:54:20,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 16:54:20,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 43. [2020-12-09 16:54:20,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-09 16:54:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 50 transitions. [2020-12-09 16:54:20,308 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 50 transitions. Word has length 23 [2020-12-09 16:54:20,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:20,309 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 50 transitions. [2020-12-09 16:54:20,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 16:54:20,309 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 50 transitions. [2020-12-09 16:54:20,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-09 16:54:20,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:20,309 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2020-12-09 16:54:20,510 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-09 16:54:20,511 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:20,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:20,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1549640323, now seen corresponding path program 3 times [2020-12-09 16:54:20,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:20,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385376145] [2020-12-09 16:54:20,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:20,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:20,606 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385376145] [2020-12-09 16:54:20,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866228577] [2020-12-09 16:54:20,606 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:20,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 16:54:20,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 16:54:20,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-09 16:54:20,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:20,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 52 refuted. 8 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 16:54:28,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1604992842] [2020-12-09 16:54:28,323 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:54:28,323 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:54:28,323 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:54:28,323 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:54:28,323 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:54:28,528 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:54:28,765 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-09 16:54:29,394 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:54:29,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:54:29,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 22 [2020-12-09 16:54:29,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515228129] [2020-12-09 16:54:29,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 16:54:29,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:29,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 16:54:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=772, Unknown=4, NotChecked=0, Total=992 [2020-12-09 16:54:29,396 INFO L87 Difference]: Start difference. First operand 43 states and 50 transitions. Second operand 24 states. [2020-12-09 16:54:40,135 WARN L197 SmtUtils]: Spent 6.07 s on a formula simplification. DAG size of input: 40 DAG size of output: 28 [2020-12-09 16:54:50,259 WARN L197 SmtUtils]: Spent 10.08 s on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2020-12-09 16:54:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:50,508 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2020-12-09 16:54:50,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-09 16:54:50,508 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2020-12-09 16:54:50,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:50,509 INFO L225 Difference]: With dead ends: 115 [2020-12-09 16:54:50,509 INFO L226 Difference]: Without dead ends: 86 [2020-12-09 16:54:50,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=494, Invalid=1572, Unknown=4, NotChecked=0, Total=2070 [2020-12-09 16:54:50,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-09 16:54:50,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2020-12-09 16:54:50,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 16:54:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-12-09 16:54:50,516 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 31 [2020-12-09 16:54:50,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:50,516 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-12-09 16:54:50,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 16:54:50,516 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-12-09 16:54:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-09 16:54:50,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 16:54:50,517 INFO L422 BasicCegarLoop]: trace histogram [11, 8, 7, 7, 3, 3, 3, 1, 1, 1, 1, 1] [2020-12-09 16:54:50,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:50,719 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-12-09 16:54:50,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 16:54:50,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1951391849, now seen corresponding path program 4 times [2020-12-09 16:54:50,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 16:54:50,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513163978] [2020-12-09 16:54:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 16:54:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:50,858 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 8 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 16:54:50,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513163978] [2020-12-09 16:54:50,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283544388] [2020-12-09 16:54:50,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:50,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 16:54:50,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 16:54:50,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 16:54:51,000 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 93 proven. 36 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 16:54:51,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 16:54:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 91 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-09 16:54:51,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1205531617] [2020-12-09 16:54:51,149 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-12-09 16:54:51,149 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 16:54:51,149 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-12-09 16:54:51,149 INFO L176 IcfgInterpreter]: Starting interpretation [2020-12-09 16:54:51,150 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-12-09 16:54:51,347 INFO L180 IcfgInterpreter]: Interpretation finished [2020-12-09 16:54:51,576 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-09 16:54:52,230 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-09 16:54:52,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 16:54:52,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2020-12-09 16:54:52,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459735471] [2020-12-09 16:54:52,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-09 16:54:52,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 16:54:52,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-09 16:54:52,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2020-12-09 16:54:52,232 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 25 states. [2020-12-09 16:54:52,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 16:54:52,450 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-09 16:54:52,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 16:54:52,451 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 47 [2020-12-09 16:54:52,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 16:54:52,451 INFO L225 Difference]: With dead ends: 66 [2020-12-09 16:54:52,451 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 16:54:52,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=229, Invalid=1177, Unknown=0, NotChecked=0, Total=1406 [2020-12-09 16:54:52,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 16:54:52,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 16:54:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 16:54:52,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 16:54:52,452 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2020-12-09 16:54:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 16:54:52,453 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 16:54:52,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-09 16:54:52,453 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 16:54:52,453 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 16:54:52,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 16:54:52,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 16:54:52,794 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 44 [2020-12-09 16:54:52,795 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2020-12-09 16:54:52,795 INFO L262 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-12-09 16:54:52,795 INFO L262 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L15-1(line 15) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L15-3(lines 13 29) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr6ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L265 CegarLoopResult]: At program point L28(lines 12 29) the Hoare annotation is: true [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 14) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 15) no Hoare annotation was computed. [2020-12-09 16:54:52,796 INFO L262 CegarLoopResult]: For program point L22(lines 22 26) no Hoare annotation was computed. [2020-12-09 16:54:52,797 INFO L258 CegarLoopResult]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse1 (= ULTIMATE.start_gcd_test_~b 18)) (.cse0 (+ ULTIMATE.start_gcd_test_~b ULTIMATE.start_gcd_test_~a)) (.cse3 (<= (div (+ ULTIMATE.start_gcd_test_~a (- 63)) (- 3)) 18))) (or (and (<= .cse0 63) (<= 63 .cse0) .cse1) (and (= ULTIMATE.start_gcd_test_~a 63) .cse1) (let ((.cse2 (+ (* 2 ULTIMATE.start_gcd_test_~b) ULTIMATE.start_gcd_test_~a))) (and (<= 63 .cse2) (<= .cse2 63) .cse1)) (and (<= (+ ULTIMATE.start_gcd_test_~b (* 2 ULTIMATE.start_gcd_test_~a)) 18) .cse3 (<= ULTIMATE.start_gcd_test_~a (+ ULTIMATE.start_gcd_test_~b 9))) (let ((.cse4 (+ (* 3 ULTIMATE.start_gcd_test_~b) ULTIMATE.start_gcd_test_~a))) (and (<= .cse4 63) (<= 63 .cse4) .cse1)) (and (<= .cse0 18) (<= (* 6 ULTIMATE.start_gcd_test_~a) (+ (* 5 ULTIMATE.start_gcd_test_~b) 9)) .cse3))) [2020-12-09 16:54:52,797 INFO L262 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-12-09 16:54:52,797 INFO L262 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-12-09 16:54:52,797 INFO L262 CegarLoopResult]: For program point L14-2(line 14) no Hoare annotation was computed. [2020-12-09 16:54:52,797 INFO L262 CegarLoopResult]: For program point L14-4(lines 13 29) no Hoare annotation was computed. [2020-12-09 16:54:52,797 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr7ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2020-12-09 16:54:52,808 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 04:54:52 BoogieIcfgContainer [2020-12-09 16:54:52,808 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 16:54:52,808 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 16:54:52,808 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 16:54:52,808 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 16:54:52,809 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 04:54:14" (3/4) ... [2020-12-09 16:54:52,811 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 16:54:52,816 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 20 nodes and edges [2020-12-09 16:54:52,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2020-12-09 16:54:52,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 16:54:52,817 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-09 16:54:52,845 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_face287f-81a9-4c87-b0cf-44232cea9aae/bin/utaipan/witness.graphml [2020-12-09 16:54:52,845 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 16:54:52,846 INFO L168 Benchmark]: Toolchain (without parser) took 38802.82 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 56.7 MB in the beginning and 116.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 69.7 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,846 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:54:52,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 170.97 ms. Allocated memory is still 96.5 MB. Free memory was 56.6 MB in the beginning and 70.9 MB in the end (delta: -14.3 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 22.78 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 69.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,847 INFO L168 Benchmark]: Boogie Preprocessor took 14.71 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.4 MB in the end (delta: 994.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 16:54:52,847 INFO L168 Benchmark]: RCFGBuilder took 321.28 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 59.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,847 INFO L168 Benchmark]: TraceAbstraction took 38231.15 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 59.6 MB in the beginning and 39.7 MB in the end (delta: 19.9 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,848 INFO L168 Benchmark]: Witness Printer took 37.04 ms. Allocated memory is still 142.6 MB. Free memory was 39.7 MB in the beginning and 116.9 MB in the end (delta: -77.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-12-09 16:54:52,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 96.5 MB. Free memory is still 72.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 170.97 ms. Allocated memory is still 96.5 MB. Free memory was 56.6 MB in the beginning and 70.9 MB in the end (delta: -14.3 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 22.78 ms. Allocated memory is still 96.5 MB. Free memory was 70.9 MB in the beginning and 69.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 14.71 ms. Allocated memory is still 96.5 MB. Free memory was 69.4 MB in the beginning and 68.4 MB in the end (delta: 994.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 321.28 ms. Allocated memory is still 96.5 MB. Free memory was 68.4 MB in the beginning and 59.9 MB in the end (delta: 8.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 38231.15 ms. Allocated memory was 96.5 MB in the beginning and 142.6 MB in the end (delta: 46.1 MB). Free memory was 59.6 MB in the beginning and 39.7 MB in the end (delta: 19.9 MB). Peak memory consumption was 68.3 MB. Max. memory is 16.1 GB. * Witness Printer took 37.04 ms. Allocated memory is still 142.6 MB. Free memory was 39.7 MB in the beginning and 116.9 MB in the end (delta: -77.2 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 25]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 23]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 15]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 14]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - AllSpecificationsHoldResult: All specifications hold 8 specifications checked. All of them hold - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: ((((((b + a <= 63 && 63 <= b + a) && b == 18) || (a == 63 && b == 18)) || ((63 <= 2 * b + a && 2 * b + a <= 63) && b == 18)) || ((b + 2 * a <= 18 && (a + -63) / -3 <= 18) && a <= b + 9)) || ((3 * b + a <= 63 && 63 <= 3 * b + a) && b == 18)) || ((b + a <= 18 && 6 * a <= 5 * b + 9) && (a + -63) / -3 <= 18) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 8 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 38.0s, OverallIterations: 10, TraceHistogramMax: 11, AutomataDifference: 21.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 36 SDtfs, 343 SDslu, 2 SDs, 0 SdLazy, 817 SolverSat, 151 SolverUnsat, 2 SolverUnknown, 0 SolverNotchecked, 4.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 517 GetRequests, 350 SyntacticMatches, 13 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1766 ImplicationChecksByTransitivity, 28.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=65occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 60 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 101 HoareAnnotationTreeSize, 2 FomulaSimplifications, 25 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 204 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 8.9s InterpolantComputationTime, 344 NumberOfCodeBlocks, 320 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 485 ConstructedInterpolants, 15 QuantifiedInterpolants, 101119 SizeOfPredicates, 30 NumberOfNonLiveVariables, 481 ConjunctsInSsa, 62 ConjunctsInUnsatCore, 24 InterpolantComputations, 5 PerfectInterpolantSequences, 445/921 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...