./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/gcd01-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive/gcd01-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d6f4e1dd3818e9d3e8c54653af66359ead501b84 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 07:32:20,889 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 07:32:20,891 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 07:32:20,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 07:32:20,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 07:32:20,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 07:32:20,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 07:32:20,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 07:32:20,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 07:32:20,932 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 07:32:20,933 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 07:32:20,934 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 07:32:20,935 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 07:32:20,936 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 07:32:20,937 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 07:32:20,938 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 07:32:20,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 07:32:20,940 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 07:32:20,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 07:32:20,945 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 07:32:20,946 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 07:32:20,948 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 07:32:20,949 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 07:32:20,950 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 07:32:20,953 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 07:32:20,954 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 07:32:20,954 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 07:32:20,955 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 07:32:20,956 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 07:32:20,957 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 07:32:20,957 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 07:32:20,958 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 07:32:20,959 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 07:32:20,960 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 07:32:20,961 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 07:32:20,961 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 07:32:20,962 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 07:32:20,962 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 07:32:20,962 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 07:32:20,963 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 07:32:20,964 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 07:32:20,964 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 07:32:20,981 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 07:32:20,982 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 07:32:20,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 07:32:20,982 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 07:32:20,982 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 07:32:20,982 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 07:32:20,983 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 07:32:20,983 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 07:32:20,984 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 07:32:20,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 07:32:20,984 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 07:32:20,984 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 07:32:20,984 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 07:32:20,985 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 07:32:20,986 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 07:32:20,986 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 07:32:20,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 07:32:20,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 07:32:20,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 07:32:20,986 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 07:32:20,986 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 07:32:20,987 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 07:32:20,987 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 07:32:20,987 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 07:32:20,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 07:32:20,987 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 07:32:20,987 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_6059f7eb-d571-4261-b4e7-7e24cf489b95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d6f4e1dd3818e9d3e8c54653af66359ead501b84 [2020-12-09 07:32:21,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 07:32:21,191 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 07:32:21,193 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 07:32:21,194 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 07:32:21,195 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 07:32:21,195 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/../../sv-benchmarks/c/recursive/gcd01-1.c [2020-12-09 07:32:21,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/data/99826f97c/d75e76dfe0ec47cfad990627e0dd11ec/FLAG13026b1de [2020-12-09 07:32:21,582 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 07:32:21,583 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/sv-benchmarks/c/recursive/gcd01-1.c [2020-12-09 07:32:21,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/data/99826f97c/d75e76dfe0ec47cfad990627e0dd11ec/FLAG13026b1de [2020-12-09 07:32:22,035 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/data/99826f97c/d75e76dfe0ec47cfad990627e0dd11ec [2020-12-09 07:32:22,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 07:32:22,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 07:32:22,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 07:32:22,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 07:32:22,046 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 07:32:22,046 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,048 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7577169d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22, skipping insertion in model container [2020-12-09 07:32:22,049 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,053 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 07:32:22,063 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 07:32:22,177 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_6059f7eb-d571-4261-b4e7-7e24cf489b95/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2020-12-09 07:32:22,179 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:32:22,185 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 07:32:22,196 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_6059f7eb-d571-4261-b4e7-7e24cf489b95/sv-benchmarks/c/recursive/gcd01-1.c[1008,1021] [2020-12-09 07:32:22,196 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 07:32:22,206 INFO L208 MainTranslator]: Completed translation [2020-12-09 07:32:22,206 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22 WrapperNode [2020-12-09 07:32:22,206 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 07:32:22,207 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 07:32:22,207 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 07:32:22,207 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 07:32:22,214 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,221 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 07:32:22,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 07:32:22,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 07:32:22,236 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 07:32:22,243 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,243 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,244 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,248 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... [2020-12-09 07:32:22,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 07:32:22,250 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 07:32:22,250 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 07:32:22,250 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 07:32:22,251 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/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 07:32:22,309 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-12-09 07:32:22,310 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-12-09 07:32:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 07:32:22,310 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 07:32:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 07:32:22,310 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 07:32:22,481 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 07:32:22,482 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 07:32:22,483 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:32:22 BoogieIcfgContainer [2020-12-09 07:32:22,483 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 07:32:22,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 07:32:22,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 07:32:22,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 07:32:22,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:32:22" (1/3) ... [2020-12-09 07:32:22,487 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aee54f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:32:22, skipping insertion in model container [2020-12-09 07:32:22,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:32:22" (2/3) ... [2020-12-09 07:32:22,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4aee54f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:32:22, skipping insertion in model container [2020-12-09 07:32:22,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:32:22" (3/3) ... [2020-12-09 07:32:22,494 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd01-1.c [2020-12-09 07:32:22,504 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 07:32:22,506 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 07:32:22,517 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 07:32:22,533 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 07:32:22,534 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 07:32:22,534 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 07:32:22,534 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 07:32:22,534 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 07:32:22,534 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 07:32:22,534 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 07:32:22,534 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 07:32:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-12-09 07:32:22,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 07:32:22,548 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:22,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:22,548 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:22,554 INFO L82 PathProgramCache]: Analyzing trace with hash -672472283, now seen corresponding path program 1 times [2020-12-09 07:32:22,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:22,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234126802] [2020-12-09 07:32:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:22,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:22,714 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 07:32:22,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234126802] [2020-12-09 07:32:22,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:22,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 07:32:22,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506218920] [2020-12-09 07:32:22,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:32:22,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:22,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:32:22,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:32:22,735 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 6 states. [2020-12-09 07:32:22,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:22,823 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2020-12-09 07:32:22,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:32:22,825 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-12-09 07:32:22,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:22,833 INFO L225 Difference]: With dead ends: 32 [2020-12-09 07:32:22,833 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 07:32:22,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:32:22,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 07:32:22,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 07:32:22,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 07:32:22,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-09 07:32:22,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2020-12-09 07:32:22,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:22,872 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-09 07:32:22,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:32:22,872 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-09 07:32:22,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-09 07:32:22,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:22,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:22,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 07:32:22,874 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:22,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:22,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1200358745, now seen corresponding path program 1 times [2020-12-09 07:32:22,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:22,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287537474] [2020-12-09 07:32:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:22,932 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 07:32:22,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287537474] [2020-12-09 07:32:22,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:22,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 07:32:22,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61073436] [2020-12-09 07:32:22,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:32:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:22,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:32:22,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:32:22,936 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2020-12-09 07:32:22,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:22,974 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-09 07:32:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:32:22,974 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-09 07:32:22,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:22,976 INFO L225 Difference]: With dead ends: 26 [2020-12-09 07:32:22,976 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 07:32:22,977 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:32:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 07:32:22,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-09 07:32:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 07:32:22,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2020-12-09 07:32:22,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 12 [2020-12-09 07:32:22,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:22,983 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2020-12-09 07:32:22,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:32:22,983 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2020-12-09 07:32:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 07:32:22,984 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:22,984 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:22,984 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 07:32:22,985 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:22,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:22,985 INFO L82 PathProgramCache]: Analyzing trace with hash -229059489, now seen corresponding path program 1 times [2020-12-09 07:32:22,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:22,986 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091917384] [2020-12-09 07:32:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:23,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:32:23,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091917384] [2020-12-09 07:32:23,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:23,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 07:32:23,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074700920] [2020-12-09 07:32:23,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 07:32:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:23,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 07:32:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-09 07:32:23,058 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 6 states. [2020-12-09 07:32:23,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:23,132 INFO L93 Difference]: Finished difference Result 32 states and 41 transitions. [2020-12-09 07:32:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 07:32:23,133 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-12-09 07:32:23,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:23,134 INFO L225 Difference]: With dead ends: 32 [2020-12-09 07:32:23,134 INFO L226 Difference]: Without dead ends: 24 [2020-12-09 07:32:23,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:32:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-09 07:32:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-12-09 07:32:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-09 07:32:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2020-12-09 07:32:23,143 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 19 [2020-12-09 07:32:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:23,143 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2020-12-09 07:32:23,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 07:32:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2020-12-09 07:32:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-09 07:32:23,145 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:23,145 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:23,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 07:32:23,145 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:23,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1574819235, now seen corresponding path program 1 times [2020-12-09 07:32:23,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:23,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531258115] [2020-12-09 07:32:23,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:23,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 07:32:23,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531258115] [2020-12-09 07:32:23,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:23,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:32:23,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982339926] [2020-12-09 07:32:23,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:32:23,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:23,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:32:23,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:32:23,217 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2020-12-09 07:32:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:23,289 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2020-12-09 07:32:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:32:23,290 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-12-09 07:32:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:23,290 INFO L225 Difference]: With dead ends: 32 [2020-12-09 07:32:23,290 INFO L226 Difference]: Without dead ends: 22 [2020-12-09 07:32:23,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:32:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-09 07:32:23,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-12-09 07:32:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 07:32:23,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-12-09 07:32:23,295 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 19 [2020-12-09 07:32:23,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:23,295 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-12-09 07:32:23,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:32:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-12-09 07:32:23,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 07:32:23,296 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:23,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:23,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 07:32:23,296 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:23,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1175015767, now seen corresponding path program 1 times [2020-12-09 07:32:23,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:23,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660405347] [2020-12-09 07:32:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:23,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 07:32:23,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660405347] [2020-12-09 07:32:23,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:23,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:32:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943600039] [2020-12-09 07:32:23,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:32:23,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:23,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:32:23,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:32:23,345 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 7 states. [2020-12-09 07:32:23,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:23,377 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-12-09 07:32:23,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:32:23,377 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-09 07:32:23,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:23,378 INFO L225 Difference]: With dead ends: 27 [2020-12-09 07:32:23,378 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 07:32:23,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:32:23,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 07:32:23,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2020-12-09 07:32:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-09 07:32:23,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2020-12-09 07:32:23,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 20 [2020-12-09 07:32:23,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:23,382 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2020-12-09 07:32:23,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:32:23,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2020-12-09 07:32:23,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-09 07:32:23,383 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:23,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:23,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 07:32:23,383 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:23,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:23,384 INFO L82 PathProgramCache]: Analyzing trace with hash 63835465, now seen corresponding path program 1 times [2020-12-09 07:32:23,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:23,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147357637] [2020-12-09 07:32:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-09 07:32:23,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147357637] [2020-12-09 07:32:23,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:23,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-09 07:32:23,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009968524] [2020-12-09 07:32:23,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-09 07:32:23,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:23,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-09 07:32:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-09 07:32:23,433 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 7 states. [2020-12-09 07:32:23,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:23,463 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2020-12-09 07:32:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 07:32:23,463 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-12-09 07:32:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:23,464 INFO L225 Difference]: With dead ends: 30 [2020-12-09 07:32:23,464 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 07:32:23,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-09 07:32:23,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 07:32:23,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 07:32:23,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 07:32:23,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2020-12-09 07:32:23,468 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 20 [2020-12-09 07:32:23,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:23,469 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2020-12-09 07:32:23,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-09 07:32:23,469 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2020-12-09 07:32:23,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-09 07:32:23,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 07:32:23,470 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 07:32:23,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 07:32:23,470 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 07:32:23,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 07:32:23,471 INFO L82 PathProgramCache]: Analyzing trace with hash 915558905, now seen corresponding path program 1 times [2020-12-09 07:32:23,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 07:32:23,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781443295] [2020-12-09 07:32:23,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 07:32:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 07:32:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-09 07:32:23,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781443295] [2020-12-09 07:32:23,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 07:32:23,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-09 07:32:23,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12629268] [2020-12-09 07:32:23,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-09 07:32:23,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 07:32:23,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-09 07:32:23,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-09 07:32:23,521 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand 8 states. [2020-12-09 07:32:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 07:32:23,559 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2020-12-09 07:32:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 07:32:23,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-12-09 07:32:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 07:32:23,560 INFO L225 Difference]: With dead ends: 26 [2020-12-09 07:32:23,560 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 07:32:23,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-12-09 07:32:23,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 07:32:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 07:32:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 07:32:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 07:32:23,561 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 28 [2020-12-09 07:32:23,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 07:32:23,561 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 07:32:23,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-09 07:32:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 07:32:23,562 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 07:32:23,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 07:32:23,563 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 07:32:23,601 INFO L262 CegarLoopResult]: For program point gcdFINAL(lines 17 28) no Hoare annotation was computed. [2020-12-09 07:32:23,601 INFO L258 CegarLoopResult]: At program point L27(line 27) the Hoare annotation is: (and (<= (+ gcd_~y1 1) gcd_~y2) (<= |gcd_#in~y2| gcd_~y2) (<= 1 gcd_~y1) (<= |gcd_#in~y1| gcd_~y1)) [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point gcdEXIT(lines 17 28) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L27-1(line 27) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L258 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 gcd_~y2) (<= (+ gcd_~y2 1) gcd_~y1) (<= |gcd_#in~y2| gcd_~y2) (<= |gcd_#in~y1| gcd_~y1)) [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L265 CegarLoopResult]: At program point gcdENTRY(lines 17 28) the Hoare annotation is: true [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L21(lines 21 23) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 07:32:23,602 INFO L262 CegarLoopResult]: For program point L32(lines 32 34) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 41) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L265 CegarLoopResult]: At program point L43(lines 30 45) the Hoare annotation is: true [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point L41(line 41) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L258 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: (and (<= 1 ULTIMATE.start_main_~n~0) (<= 1 ULTIMATE.start_main_~m~0)) [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-12-09 07:32:23,603 INFO L262 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-12-09 07:32:23,609 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:32:23 BoogieIcfgContainer [2020-12-09 07:32:23,609 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 07:32:23,609 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 07:32:23,609 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 07:32:23,609 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 07:32:23,610 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:32:22" (3/4) ... [2020-12-09 07:32:23,612 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 07:32:23,615 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2020-12-09 07:32:23,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 07:32:23,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2020-12-09 07:32:23,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:32:23,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 07:32:23,644 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_6059f7eb-d571-4261-b4e7-7e24cf489b95/bin/utaipan/witness.graphml [2020-12-09 07:32:23,644 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 07:32:23,646 INFO L168 Benchmark]: Toolchain (without parser) took 1604.52 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 38.9 MB in the beginning and 61.5 MB in the end (delta: -22.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,646 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:32:23,646 INFO L168 Benchmark]: CACSL2BoogieTranslator took 163.95 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 38.7 MB in the beginning and 63.8 MB in the end (delta: -25.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,647 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.22 ms. Allocated memory is still 86.0 MB. Free memory was 63.8 MB in the beginning and 62.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,647 INFO L168 Benchmark]: Boogie Preprocessor took 13.64 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 61.5 MB in the end (delta: 818.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 07:32:23,648 INFO L168 Benchmark]: RCFGBuilder took 233.10 ms. Allocated memory is still 86.0 MB. Free memory was 61.5 MB in the beginning and 47.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,648 INFO L168 Benchmark]: TraceAbstraction took 1124.63 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.5 MB in the beginning and 64.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,648 INFO L168 Benchmark]: Witness Printer took 35.14 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 61.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-12-09 07:32:23,650 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 71.3 MB. Free memory was 51.2 MB in the beginning and 51.2 MB in the end (delta: 29.8 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 163.95 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 38.7 MB in the beginning and 63.8 MB in the end (delta: -25.0 MB). Peak memory consumption was 3.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.22 ms. Allocated memory is still 86.0 MB. Free memory was 63.8 MB in the beginning and 62.5 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 13.64 ms. Allocated memory is still 86.0 MB. Free memory was 62.3 MB in the beginning and 61.5 MB in the end (delta: 818.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 233.10 ms. Allocated memory is still 86.0 MB. Free memory was 61.5 MB in the beginning and 47.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1124.63 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 46.5 MB in the beginning and 64.6 MB in the end (delta: -18.2 MB). Peak memory consumption was 2.6 MB. Max. memory is 16.1 GB. * Witness Printer took 35.14 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 61.5 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 41]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.0s, OverallIterations: 7, TraceHistogramMax: 3, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 110 SDtfs, 92 SDslu, 347 SDs, 0 SdLazy, 287 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=6, 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, 7 MinimizatonAttempts, 8 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 14 NumberOfFragments, 39 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 5 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 122 ConstructedInterpolants, 0 QuantifiedInterpolants, 5062 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 34/34 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...