./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI --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 b3379b599758536e5aae0f8bd653896218533908 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 02:26:47,132 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 02:26:47,135 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 02:26:47,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 02:26:47,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 02:26:47,204 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 02:26:47,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 02:26:47,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 02:26:47,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 02:26:47,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 02:26:47,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 02:26:47,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 02:26:47,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 02:26:47,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 02:26:47,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 02:26:47,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 02:26:47,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 02:26:47,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 02:26:47,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 02:26:47,252 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 02:26:47,254 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 02:26:47,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 02:26:47,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 02:26:47,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 02:26:47,272 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 02:26:47,272 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 02:26:47,273 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 02:26:47,275 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 02:26:47,276 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 02:26:47,278 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 02:26:47,278 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 02:26:47,280 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 02:26:47,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 02:26:47,284 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 02:26:47,285 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 02:26:47,285 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 02:26:47,286 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 02:26:47,287 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 02:26:47,287 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 02:26:47,288 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 02:26:47,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 02:26:47,292 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/config/svcomp-Overflow-32bit-Taipan_Default.epf [2021-10-11 02:26:47,346 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 02:26:47,347 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 02:26:47,348 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-11 02:26:47,349 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-11 02:26:47,349 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-11 02:26:47,349 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-11 02:26:47,349 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-11 02:26:47,350 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-11 02:26:47,350 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-11 02:26:47,350 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-11 02:26:47,351 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-11 02:26:47,352 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-11 02:26:47,352 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-11 02:26:47,352 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-11 02:26:47,353 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-11 02:26:47,354 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 02:26:47,354 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 02:26:47,354 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-11 02:26:47,354 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 02:26:47,355 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 02:26:47,355 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 02:26:47,355 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 02:26:47,355 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 02:26:47,356 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 02:26:47,356 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-11 02:26:47,356 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 02:26:47,356 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 02:26:47,357 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 02:26:47,357 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 02:26:47,359 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 02:26:47,359 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 02:26:47,360 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:47,360 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 02:26:47,360 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 02:26:47,361 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 02:26:47,361 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-11 02:26:47,361 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 02:26:47,361 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 02:26:47,362 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 02:26:47,362 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-11 02:26:47,362 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3379b599758536e5aae0f8bd653896218533908 [2021-10-11 02:26:47,725 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 02:26:47,766 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 02:26:47,770 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 02:26:47,771 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 02:26:47,772 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 02:26:47,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/../../sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i [2021-10-11 02:26:47,867 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/data/27a359150/e5a99d6248b04e94ba2b2b39a6cee663/FLAG5bd9f7b7f [2021-10-11 02:26:48,376 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 02:26:48,377 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i [2021-10-11 02:26:48,384 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/data/27a359150/e5a99d6248b04e94ba2b2b39a6cee663/FLAG5bd9f7b7f [2021-10-11 02:26:48,711 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/data/27a359150/e5a99d6248b04e94ba2b2b39a6cee663 [2021-10-11 02:26:48,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 02:26:48,715 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 02:26:48,717 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:48,717 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 02:26:48,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 02:26:48,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:48" (1/1) ... [2021-10-11 02:26:48,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1890a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:48, skipping insertion in model container [2021-10-11 02:26:48,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 02:26:48" (1/1) ... [2021-10-11 02:26:48,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 02:26:48,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 02:26:48,931 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i[872,885] [2021-10-11 02:26:48,956 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:48,967 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 02:26:48,983 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/sv-benchmarks/c/loop-zilu/benchmark51_polynomial.i[872,885] [2021-10-11 02:26:48,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 02:26:49,018 INFO L208 MainTranslator]: Completed translation [2021-10-11 02:26:49,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49 WrapperNode [2021-10-11 02:26:49,019 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 02:26:49,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:49,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 02:26:49,021 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 02:26:49,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,037 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 02:26:49,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 02:26:49,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 02:26:49,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 02:26:49,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,065 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,071 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,075 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... [2021-10-11 02:26:49,079 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 02:26:49,080 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 02:26:49,080 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 02:26:49,080 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 02:26:49,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 02:26:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 02:26:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 02:26:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 02:26:49,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 02:26:49,475 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 02:26:49,475 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 02:26:49,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:49 BoogieIcfgContainer [2021-10-11 02:26:49,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 02:26:49,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 02:26:49,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 02:26:49,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 02:26:49,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 02:26:48" (1/3) ... [2021-10-11 02:26:49,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dca05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:49, skipping insertion in model container [2021-10-11 02:26:49,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 02:26:49" (2/3) ... [2021-10-11 02:26:49,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24dca05e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 02:26:49, skipping insertion in model container [2021-10-11 02:26:49,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:49" (3/3) ... [2021-10-11 02:26:49,486 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark51_polynomial.i [2021-10-11 02:26:49,500 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 02:26:49,503 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2021-10-11 02:26:49,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-11 02:26:49,539 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 02:26:49,539 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 02:26:49,539 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 02:26:49,539 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 02:26:49,539 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 02:26:49,540 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 02:26:49,540 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 02:26:49,540 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 02:26:49,560 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2021-10-11 02:26:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 02:26:49,565 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:49,573 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 02:26:49,573 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:49,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:49,579 INFO L82 PathProgramCache]: Analyzing trace with hash 79647328, now seen corresponding path program 1 times [2021-10-11 02:26:49,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:49,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390615676] [2021-10-11 02:26:49,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:49,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:49,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:49,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390615676] [2021-10-11 02:26:49,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:49,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:49,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220681442] [2021-10-11 02:26:49,867 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:49,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:49,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:49,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:49,887 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 3 states. [2021-10-11 02:26:50,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,028 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2021-10-11 02:26:50,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:50,031 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 02:26:50,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,048 INFO L225 Difference]: With dead ends: 45 [2021-10-11 02:26:50,057 INFO L226 Difference]: Without dead ends: 24 [2021-10-11 02:26:50,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-11 02:26:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 19. [2021-10-11 02:26:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-10-11 02:26:50,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-10-11 02:26:50,104 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 5 [2021-10-11 02:26:50,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,104 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-10-11 02:26:50,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:50,105 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-10-11 02:26:50,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:26:50,105 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 02:26:50,108 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1825893861, now seen corresponding path program 1 times [2021-10-11 02:26:50,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094597529] [2021-10-11 02:26:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094597529] [2021-10-11 02:26:50,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:50,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221891391] [2021-10-11 02:26:50,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:50,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:50,198 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2021-10-11 02:26:50,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,266 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-10-11 02:26:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:50,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 02:26:50,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,270 INFO L225 Difference]: With dead ends: 40 [2021-10-11 02:26:50,270 INFO L226 Difference]: Without dead ends: 25 [2021-10-11 02:26:50,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:50,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-11 02:26:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-10-11 02:26:50,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-10-11 02:26:50,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-10-11 02:26:50,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 6 [2021-10-11 02:26:50,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,283 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-10-11 02:26:50,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-10-11 02:26:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 02:26:50,284 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,285 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 02:26:50,286 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1825894053, now seen corresponding path program 1 times [2021-10-11 02:26:50,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158666532] [2021-10-11 02:26:50,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158666532] [2021-10-11 02:26:50,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 02:26:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130280317] [2021-10-11 02:26:50,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 02:26:50,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 02:26:50,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:50,366 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand 3 states. [2021-10-11 02:26:50,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,380 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-10-11 02:26:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 02:26:50,385 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 02:26:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,385 INFO L225 Difference]: With dead ends: 22 [2021-10-11 02:26:50,386 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:26:50,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 02:26:50,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:26:50,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-11 02:26:50,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2021-10-11 02:26:50,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-10-11 02:26:50,390 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 6 [2021-10-11 02:26:50,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,390 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-10-11 02:26:50,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 02:26:50,390 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-10-11 02:26:50,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:50,391 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,391 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-11 02:26:50,391 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,392 INFO L82 PathProgramCache]: Analyzing trace with hash -768134774, now seen corresponding path program 1 times [2021-10-11 02:26:50,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535065245] [2021-10-11 02:26:50,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535065245] [2021-10-11 02:26:50,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:50,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594321432] [2021-10-11 02:26:50,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:50,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:50,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:50,425 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2021-10-11 02:26:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,459 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2021-10-11 02:26:50,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:50,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,460 INFO L225 Difference]: With dead ends: 27 [2021-10-11 02:26:50,460 INFO L226 Difference]: Without dead ends: 26 [2021-10-11 02:26:50,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:50,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-11 02:26:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-11 02:26:50,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2021-10-11 02:26:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-10-11 02:26:50,465 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2021-10-11 02:26:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,465 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-10-11 02:26:50,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:50,466 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-10-11 02:26:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 02:26:50,466 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,466 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-11 02:26:50,467 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,467 INFO L82 PathProgramCache]: Analyzing trace with hash -768140732, now seen corresponding path program 1 times [2021-10-11 02:26:50,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069867610] [2021-10-11 02:26:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069867610] [2021-10-11 02:26:50,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 02:26:50,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345692734] [2021-10-11 02:26:50,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:50,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:50,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:50,523 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand 4 states. [2021-10-11 02:26:50,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,571 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2021-10-11 02:26:50,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:50,572 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2021-10-11 02:26:50,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,574 INFO L225 Difference]: With dead ends: 32 [2021-10-11 02:26:50,574 INFO L226 Difference]: Without dead ends: 31 [2021-10-11 02:26:50,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:50,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-11 02:26:50,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-10-11 02:26:50,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-10-11 02:26:50,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-11 02:26:50,579 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 7 [2021-10-11 02:26:50,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,579 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-11 02:26:50,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:50,580 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-11 02:26:50,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 02:26:50,580 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,580 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:50,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-11 02:26:50,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,581 INFO L82 PathProgramCache]: Analyzing trace with hash -94748148, now seen corresponding path program 1 times [2021-10-11 02:26:50,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406635674] [2021-10-11 02:26:50,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406635674] [2021-10-11 02:26:50,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:50,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 02:26:50,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993482334] [2021-10-11 02:26:50,630 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 02:26:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:50,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 02:26:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 02:26:50,631 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand 4 states. [2021-10-11 02:26:50,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:50,686 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2021-10-11 02:26:50,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 02:26:50,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2021-10-11 02:26:50,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:50,688 INFO L225 Difference]: With dead ends: 39 [2021-10-11 02:26:50,688 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 02:26:50,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 02:26:50,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 02:26:50,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 15. [2021-10-11 02:26:50,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:26:50,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-11 02:26:50,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 10 [2021-10-11 02:26:50,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:50,692 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-11 02:26:50,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 02:26:50,692 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-11 02:26:50,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:50,693 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:50,693 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1] [2021-10-11 02:26:50,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-11 02:26:50,693 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:50,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:50,694 INFO L82 PathProgramCache]: Analyzing trace with hash -2084672848, now seen corresponding path program 1 times [2021-10-11 02:26:50,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:50,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84457230] [2021-10-11 02:26:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84457230] [2021-10-11 02:26:50,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972358855] [2021-10-11 02:26:50,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 02:26:50,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:50,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 02:26:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 02:26:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-11 02:26:50,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:50,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [199775041] [2021-10-11 02:26:51,000 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-11 02:26:51,000 INFO L166 IcfgInterpreter]: Building call graph [2021-10-11 02:26:51,006 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-11 02:26:51,018 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-11 02:26:51,019 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-11 02:26:51,495 INFO L180 IcfgInterpreter]: Interpretation finished [2021-10-11 02:26:51,820 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 43 [2021-10-11 02:26:52,013 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-10-11 02:26:52,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2021-10-11 02:26:52,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 5, 5] total 12 [2021-10-11 02:26:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24220987] [2021-10-11 02:26:52,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 02:26:52,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 02:26:52,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:52,118 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 5 states. [2021-10-11 02:26:52,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:52,170 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2021-10-11 02:26:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 02:26:52,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2021-10-11 02:26:52,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:52,172 INFO L225 Difference]: With dead ends: 23 [2021-10-11 02:26:52,172 INFO L226 Difference]: Without dead ends: 22 [2021-10-11 02:26:52,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-10-11 02:26:52,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-11 02:26:52,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 15. [2021-10-11 02:26:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 02:26:52,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-10-11 02:26:52,185 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 12 [2021-10-11 02:26:52,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:52,186 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-10-11 02:26:52,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 02:26:52,186 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-10-11 02:26:52,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 02:26:52,187 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 02:26:52,187 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 02:26:52,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-11 02:26:52,414 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2021-10-11 02:26:52,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 02:26:52,414 INFO L82 PathProgramCache]: Analyzing trace with hash -858462666, now seen corresponding path program 1 times [2021-10-11 02:26:52,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-11 02:26:52,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644391224] [2021-10-11 02:26:52,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 02:26:52,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 02:26:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 02:26:52,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644391224] [2021-10-11 02:26:52,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 02:26:52,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-11 02:26:52,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586665781] [2021-10-11 02:26:52,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 02:26:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-11 02:26:52,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 02:26:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-10-11 02:26:52,478 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand 6 states. [2021-10-11 02:26:52,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 02:26:52,539 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2021-10-11 02:26:52,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 02:26:52,539 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2021-10-11 02:26:52,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 02:26:52,540 INFO L225 Difference]: With dead ends: 25 [2021-10-11 02:26:52,540 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 02:26:52,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-11 02:26:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 02:26:52,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 02:26:52,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 02:26:52,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 02:26:52,542 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 12 [2021-10-11 02:26:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 02:26:52,543 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 02:26:52,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 02:26:52,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 02:26:52,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 02:26:52,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-10-11 02:26:52,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 02:26:52,571 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-10-11 02:26:52,572 INFO L262 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2021-10-11 02:26:52,572 INFO L262 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-10-11 02:26:52,572 INFO L262 CegarLoopResult]: For program point L23-2(line 23) no Hoare annotation was computed. [2021-10-11 02:26:52,572 INFO L262 CegarLoopResult]: For program point L23-4(lines 22 26) no Hoare annotation was computed. [2021-10-11 02:26:52,573 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2021-10-11 02:26:52,573 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 02:26:52,573 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2021-10-11 02:26:52,573 INFO L265 CegarLoopResult]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-10-11 02:26:52,573 INFO L262 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2021-10-11 02:26:52,574 INFO L262 CegarLoopResult]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-10-11 02:26:52,575 INFO L258 CegarLoopResult]: At program point L24-3(lines 22 26) the Hoare annotation is: (and (<= ULTIMATE.start_main_~x~0 50) (<= 0 ULTIMATE.start_main_~x~0)) [2021-10-11 02:26:52,578 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 23) no Hoare annotation was computed. [2021-10-11 02:26:52,579 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 02:26:52,579 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW(line 25) no Hoare annotation was computed. [2021-10-11 02:26:52,579 INFO L262 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2021-10-11 02:26:52,579 INFO L262 CegarLoopResult]: For program point L25-1(line 25) no Hoare annotation was computed. [2021-10-11 02:26:52,579 INFO L262 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2021-10-11 02:26:52,580 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 24) no Hoare annotation was computed. [2021-10-11 02:26:52,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 02:26:52 BoogieIcfgContainer [2021-10-11 02:26:52,600 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 02:26:52,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 02:26:52,601 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 02:26:52,601 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 02:26:52,602 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 02:26:49" (3/4) ... [2021-10-11 02:26:52,608 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 02:26:52,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-11 02:26:52,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-11 02:26:52,617 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:26:52,618 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 02:26:52,667 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4102a84f-5b30-4fd3-8bf4-89c0eebeb80a/bin/utaipan-WLngWcDbfI/witness.graphml [2021-10-11 02:26:52,667 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 02:26:52,670 INFO L168 Benchmark]: Toolchain (without parser) took 3953.12 ms. Allocated memory was 96.5 MB in the beginning and 155.2 MB in the end (delta: 58.7 MB). Free memory was 63.5 MB in the beginning and 67.8 MB in the end (delta: -4.3 MB). Peak memory consumption was 54.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:52,671 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 51.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:52,672 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.78 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 63.4 MB in the beginning and 104.0 MB in the end (delta: -40.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:52,672 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.60 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 102.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:52,672 INFO L168 Benchmark]: Boogie Preprocessor took 23.97 ms. Allocated memory is still 127.9 MB. Free memory was 102.7 MB in the beginning and 101.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 02:26:52,673 INFO L168 Benchmark]: RCFGBuilder took 398.03 ms. Allocated memory is still 127.9 MB. Free memory was 101.5 MB in the beginning and 85.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:52,673 INFO L168 Benchmark]: TraceAbstraction took 3120.60 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 85.2 MB in the beginning and 70.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 42.7 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:52,674 INFO L168 Benchmark]: Witness Printer took 66.84 ms. Allocated memory is still 155.2 MB. Free memory was 70.9 MB in the beginning and 67.8 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 02:26:52,676 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 51.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 302.78 ms. Allocated memory was 96.5 MB in the beginning and 127.9 MB in the end (delta: 31.5 MB). Free memory was 63.4 MB in the beginning and 104.0 MB in the end (delta: -40.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.60 ms. Allocated memory is still 127.9 MB. Free memory was 104.0 MB in the beginning and 102.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 23.97 ms. Allocated memory is still 127.9 MB. Free memory was 102.7 MB in the beginning and 101.5 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 398.03 ms. Allocated memory is still 127.9 MB. Free memory was 101.5 MB in the beginning and 85.6 MB in the end (delta: 16.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3120.60 ms. Allocated memory was 127.9 MB in the beginning and 155.2 MB in the end (delta: 27.3 MB). Free memory was 85.2 MB in the beginning and 70.9 MB in the end (delta: 14.3 MB). Peak memory consumption was 42.7 MB. Max. memory is 16.1 GB. * Witness Printer took 66.84 ms. Allocated memory is still 155.2 MB. Free memory was 70.9 MB in the beginning and 67.8 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: 24]: 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: 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: 24]: 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 - AllSpecificationsHoldResult: All specifications hold 6 specifications checked. All of them hold - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: x <= 50 && 0 <= x - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 94 SDtfs, 60 SDslu, 95 SDs, 0 SdLazy, 130 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 68 GetRequests, 30 SyntacticMatches, 7 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=26occurred in iteration=4, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 27 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 8 HoareAnnotationTreeSize, 2 FomulaSimplifications, 150 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 79 ConstructedInterpolants, 0 QuantifiedInterpolants, 2281 SizeOfPredicates, 2 NumberOfNonLiveVariables, 45 ConjunctsInSsa, 5 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 5/20 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: OVERALL_TIME[ms]: 496, ICFG_INTERPRETER_ENTERED_PROCEDURES: 1, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 9, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 15, TOOLS_POST_TIME[ms]: 197, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 15, TOOLS_QUANTIFIERELIM_TIME[ms]: 191, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 147, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 27, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 3, DOMAIN_JOIN_TIME[ms]: 209, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 0, DOMAIN_WIDEN_TIME[ms]: 0, DOMAIN_ISSUBSETEQ_APPLICATIONS: 1, DOMAIN_ISSUBSETEQ_TIME[ms]: 7, DOMAIN_ISBOTTOM_APPLICATIONS: 9, DOMAIN_ISBOTTOM_TIME[ms]: 16, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 32, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 31, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 1, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 2, PATH_EXPR_TIME[ms]: 4, REGEX_TO_DAG_TIME[ms]: 3, DAG_COMPRESSION_TIME[ms]: 18, DAG_COMPRESSION_PROCESSED_NODES: 81, DAG_COMPRESSION_RETAINED_NODES: 29, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...