./Ultimate.py --spec ../sv-benchmarks/c/properties/no-overflow.prp --file ../sv-benchmarks/c/recursive/gcd02.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive/gcd02.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ad183272c46520d125e7fadb8bd25966ebd670c1 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.25-9a8b2e8 [2020-10-20 06:28:31,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-20 06:28:31,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-20 06:28:31,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-20 06:28:31,846 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-20 06:28:31,859 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-20 06:28:31,860 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-20 06:28:31,863 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-20 06:28:31,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-20 06:28:31,869 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-20 06:28:31,870 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-20 06:28:31,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-20 06:28:31,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-20 06:28:31,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-20 06:28:31,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-20 06:28:31,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-20 06:28:31,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-20 06:28:31,884 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-20 06:28:31,892 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-20 06:28:31,899 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-20 06:28:31,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-20 06:28:31,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-20 06:28:31,904 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-20 06:28:31,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-20 06:28:31,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-20 06:28:31,912 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-20 06:28:31,912 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-20 06:28:31,913 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-20 06:28:31,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-20 06:28:31,915 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-20 06:28:31,916 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-20 06:28:31,916 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-20 06:28:31,917 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-20 06:28:31,918 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-20 06:28:31,920 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-20 06:28:31,920 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-20 06:28:31,921 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-20 06:28:31,921 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-20 06:28:31,922 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-20 06:28:31,923 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-20 06:28:31,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-20 06:28:31,927 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Overflow-32bit-Automizer_Default.epf [2020-10-20 06:28:31,972 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-20 06:28:31,973 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-20 06:28:31,975 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-20 06:28:31,975 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-20 06:28:31,976 INFO L138 SettingsManager]: * Use SBE=true [2020-10-20 06:28:31,976 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-20 06:28:31,976 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-20 06:28:31,976 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-10-20 06:28:31,977 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-20 06:28:31,977 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-20 06:28:31,978 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-20 06:28:31,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-20 06:28:31,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-20 06:28:31,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-20 06:28:31,980 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2020-10-20 06:28:31,980 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-20 06:28:31,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-20 06:28:31,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-20 06:28:31,981 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-20 06:28:31,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-20 06:28:31,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-20 06:28:31,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-20 06:28:31,982 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-20 06:28:31,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-20 06:28:31,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-20 06:28:31,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-20 06:28:31,983 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-20 06:28:31,983 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-20 06:28:31,983 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-20 06:28:31,984 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-20 06:28:31,984 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-20 06:28:31,984 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux 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 -> Automizer 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 -> ad183272c46520d125e7fadb8bd25966ebd670c1 [2020-10-20 06:28:32,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-20 06:28:32,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-20 06:28:32,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-20 06:28:32,273 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-20 06:28:32,274 INFO L275 PluginConnector]: CDTParser initialized [2020-10-20 06:28:32,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/gcd02.c [2020-10-20 06:28:32,346 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65dc97616/d196af7d8f6245d1bcfd23df18f89251/FLAG1f78628c8 [2020-10-20 06:28:32,801 INFO L306 CDTParser]: Found 1 translation units. [2020-10-20 06:28:32,802 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/gcd02.c [2020-10-20 06:28:32,807 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65dc97616/d196af7d8f6245d1bcfd23df18f89251/FLAG1f78628c8 [2020-10-20 06:28:33,181 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/65dc97616/d196af7d8f6245d1bcfd23df18f89251 [2020-10-20 06:28:33,184 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-20 06:28:33,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-20 06:28:33,192 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-20 06:28:33,192 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-20 06:28:33,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-20 06:28:33,198 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,201 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@451152c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33, skipping insertion in model container [2020-10-20 06:28:33,202 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,210 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-20 06:28:33,230 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-20 06:28:33,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:28:33,478 INFO L203 MainTranslator]: Completed pre-run [2020-10-20 06:28:33,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-20 06:28:33,536 INFO L208 MainTranslator]: Completed translation [2020-10-20 06:28:33,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33 WrapperNode [2020-10-20 06:28:33,537 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-20 06:28:33,538 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-20 06:28:33,538 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-20 06:28:33,540 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-20 06:28:33,549 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,559 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-20 06:28:33,590 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-20 06:28:33,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-20 06:28:33,591 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-20 06:28:33,601 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,612 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,612 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,631 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... [2020-10-20 06:28:33,637 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-20 06:28:33,640 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-20 06:28:33,640 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-20 06:28:33,640 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-20 06:28:33,642 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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 [2020-10-20 06:28:33,722 INFO L130 BoogieDeclarations]: Found specification of procedure gcd [2020-10-20 06:28:33,724 INFO L138 BoogieDeclarations]: Found implementation of procedure gcd [2020-10-20 06:28:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-20 06:28:33,724 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-20 06:28:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure divides [2020-10-20 06:28:33,725 INFO L138 BoogieDeclarations]: Found implementation of procedure divides [2020-10-20 06:28:33,725 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-20 06:28:33,726 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-20 06:28:34,167 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-20 06:28:34,168 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-20 06:28:34,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:34 BoogieIcfgContainer [2020-10-20 06:28:34,170 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-20 06:28:34,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-20 06:28:34,172 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-20 06:28:34,175 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-20 06:28:34,175 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.10 06:28:33" (1/3) ... [2020-10-20 06:28:34,176 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d7b2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:28:34, skipping insertion in model container [2020-10-20 06:28:34,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.10 06:28:33" (2/3) ... [2020-10-20 06:28:34,177 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53d7b2c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.10 06:28:34, skipping insertion in model container [2020-10-20 06:28:34,177 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:34" (3/3) ... [2020-10-20 06:28:34,179 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd02.c [2020-10-20 06:28:34,197 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-20 06:28:34,205 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-10-20 06:28:34,219 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-20 06:28:34,244 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-20 06:28:34,244 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-20 06:28:34,244 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-20 06:28:34,244 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-20 06:28:34,244 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-20 06:28:34,245 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-20 06:28:34,245 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-20 06:28:34,245 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-20 06:28:34,264 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-20 06:28:34,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:28:34,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:34,271 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:34,271 INFO L429 AbstractCegarLoop]: === Iteration 1 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:34,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:34,277 INFO L82 PathProgramCache]: Analyzing trace with hash 2044382580, now seen corresponding path program 1 times [2020-10-20 06:28:34,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:34,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762056544] [2020-10-20 06:28:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:34,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:34,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762056544] [2020-10-20 06:28:34,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:34,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:28:34,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034112753] [2020-10-20 06:28:34,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:28:34,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:34,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:28:34,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:28:34,538 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2020-10-20 06:28:34,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:34,694 INFO L93 Difference]: Finished difference Result 82 states and 105 transitions. [2020-10-20 06:28:34,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:28:34,696 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 06:28:34,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:34,706 INFO L225 Difference]: With dead ends: 82 [2020-10-20 06:28:34,707 INFO L226 Difference]: Without dead ends: 32 [2020-10-20 06:28:34,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:28:34,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-20 06:28:34,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-20 06:28:34,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 06:28:34,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-20 06:28:34,783 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 11 [2020-10-20 06:28:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:34,784 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-20 06:28:34,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:28:34,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-20 06:28:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-20 06:28:34,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:34,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:34,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-20 06:28:34,793 INFO L429 AbstractCegarLoop]: === Iteration 2 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:34,795 INFO L82 PathProgramCache]: Analyzing trace with hash 2044382804, now seen corresponding path program 1 times [2020-10-20 06:28:34,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:34,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622709352] [2020-10-20 06:28:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:34,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:34,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622709352] [2020-10-20 06:28:34,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:34,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-20 06:28:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362628739] [2020-10-20 06:28:34,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-20 06:28:34,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:34,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-20 06:28:34,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-20 06:28:34,922 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-20 06:28:35,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:35,027 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-10-20 06:28:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-20 06:28:35,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-10-20 06:28:35,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:35,030 INFO L225 Difference]: With dead ends: 32 [2020-10-20 06:28:35,030 INFO L226 Difference]: Without dead ends: 30 [2020-10-20 06:28:35,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:28:35,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-20 06:28:35,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-20 06:28:35,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-20 06:28:35,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-20 06:28:35,040 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 11 [2020-10-20 06:28:35,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:35,041 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-20 06:28:35,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-20 06:28:35,041 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-20 06:28:35,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-20 06:28:35,043 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:35,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:35,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-20 06:28:35,044 INFO L429 AbstractCegarLoop]: === Iteration 3 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:35,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:35,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1535750884, now seen corresponding path program 1 times [2020-10-20 06:28:35,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:35,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639522982] [2020-10-20 06:28:35,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:35,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639522982] [2020-10-20 06:28:35,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:35,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-20 06:28:35,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138032886] [2020-10-20 06:28:35,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-20 06:28:35,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:35,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-20 06:28:35,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-20 06:28:35,172 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 8 states. [2020-10-20 06:28:35,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:35,369 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2020-10-20 06:28:35,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:28:35,369 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-10-20 06:28:35,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:35,372 INFO L225 Difference]: With dead ends: 42 [2020-10-20 06:28:35,373 INFO L226 Difference]: Without dead ends: 41 [2020-10-20 06:28:35,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-20 06:28:35,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-20 06:28:35,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-20 06:28:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-20 06:28:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-20 06:28:35,385 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 17 [2020-10-20 06:28:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:35,386 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-20 06:28:35,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-20 06:28:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-20 06:28:35,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-20 06:28:35,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:35,387 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:35,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-20 06:28:35,388 INFO L429 AbstractCegarLoop]: === Iteration 4 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:35,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:35,388 INFO L82 PathProgramCache]: Analyzing trace with hash -363637106, now seen corresponding path program 1 times [2020-10-20 06:28:35,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:35,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633255414] [2020-10-20 06:28:35,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:35,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:35,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633255414] [2020-10-20 06:28:35,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:35,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-20 06:28:35,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426453054] [2020-10-20 06:28:35,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-20 06:28:35,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-20 06:28:35,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:28:35,464 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 3 states. [2020-10-20 06:28:35,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:35,478 INFO L93 Difference]: Finished difference Result 38 states and 44 transitions. [2020-10-20 06:28:35,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-20 06:28:35,480 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-20 06:28:35,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:35,481 INFO L225 Difference]: With dead ends: 38 [2020-10-20 06:28:35,482 INFO L226 Difference]: Without dead ends: 37 [2020-10-20 06:28:35,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-20 06:28:35,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-20 06:28:35,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-20 06:28:35,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-20 06:28:35,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2020-10-20 06:28:35,502 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 18 [2020-10-20 06:28:35,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:35,503 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2020-10-20 06:28:35,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-20 06:28:35,503 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2020-10-20 06:28:35,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-20 06:28:35,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:35,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:35,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-20 06:28:35,506 INFO L429 AbstractCegarLoop]: === Iteration 5 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:35,506 INFO L82 PathProgramCache]: Analyzing trace with hash 1256790441, now seen corresponding path program 1 times [2020-10-20 06:28:35,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:35,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765945925] [2020-10-20 06:28:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:35,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:35,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765945925] [2020-10-20 06:28:35,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163076690] [2020-10-20 06:28:35,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:35,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 06:28:35,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:28:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-20 06:28:36,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:28:36,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [10] total 19 [2020-10-20 06:28:36,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575346962] [2020-10-20 06:28:36,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 06:28:36,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 06:28:36,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2020-10-20 06:28:36,005 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand 11 states. [2020-10-20 06:28:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:36,204 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-10-20 06:28:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 06:28:36,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 23 [2020-10-20 06:28:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:36,206 INFO L225 Difference]: With dead ends: 46 [2020-10-20 06:28:36,206 INFO L226 Difference]: Without dead ends: 31 [2020-10-20 06:28:36,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=448, Unknown=0, NotChecked=0, Total=506 [2020-10-20 06:28:36,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-20 06:28:36,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-20 06:28:36,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-20 06:28:36,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-10-20 06:28:36,214 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 23 [2020-10-20 06:28:36,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:36,214 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-10-20 06:28:36,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 06:28:36,215 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-10-20 06:28:36,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:28:36,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:36,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:36,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:36,430 INFO L429 AbstractCegarLoop]: === Iteration 6 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1044761755, now seen corresponding path program 1 times [2020-10-20 06:28:36,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:36,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535734332] [2020-10-20 06:28:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:36,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:36,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:36,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 06:28:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:36,690 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-20 06:28:36,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535734332] [2020-10-20 06:28:36,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008882522] [2020-10-20 06:28:36,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:36,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-20 06:28:36,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:28:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-20 06:28:36,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:28:36,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2020-10-20 06:28:36,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091802649] [2020-10-20 06:28:36,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-20 06:28:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:36,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-20 06:28:36,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-20 06:28:36,937 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 10 states. [2020-10-20 06:28:37,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:37,094 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-20 06:28:37,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-20 06:28:37,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-20 06:28:37,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:37,096 INFO L225 Difference]: With dead ends: 43 [2020-10-20 06:28:37,097 INFO L226 Difference]: Without dead ends: 34 [2020-10-20 06:28:37,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-10-20 06:28:37,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-20 06:28:37,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-20 06:28:37,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-20 06:28:37,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2020-10-20 06:28:37,109 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 27 [2020-10-20 06:28:37,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:37,110 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2020-10-20 06:28:37,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-20 06:28:37,110 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2020-10-20 06:28:37,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-20 06:28:37,112 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:37,113 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:37,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:37,324 INFO L429 AbstractCegarLoop]: === Iteration 7 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:37,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:37,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1475486117, now seen corresponding path program 1 times [2020-10-20 06:28:37,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:37,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889133825] [2020-10-20 06:28:37,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:37,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:37,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 06:28:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 06:28:37,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889133825] [2020-10-20 06:28:37,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-20 06:28:37,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-20 06:28:37,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038667487] [2020-10-20 06:28:37,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-20 06:28:37,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:37,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-20 06:28:37,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-20 06:28:37,461 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 9 states. [2020-10-20 06:28:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:37,630 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-20 06:28:37,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-20 06:28:37,631 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-20 06:28:37,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:37,632 INFO L225 Difference]: With dead ends: 46 [2020-10-20 06:28:37,632 INFO L226 Difference]: Without dead ends: 45 [2020-10-20 06:28:37,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-20 06:28:37,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-20 06:28:37,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2020-10-20 06:28:37,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-20 06:28:37,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 51 transitions. [2020-10-20 06:28:37,640 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 51 transitions. Word has length 27 [2020-10-20 06:28:37,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:37,641 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 51 transitions. [2020-10-20 06:28:37,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-20 06:28:37,641 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 51 transitions. [2020-10-20 06:28:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-20 06:28:37,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-20 06:28:37,643 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-20 06:28:37,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-20 06:28:37,643 INFO L429 AbstractCegarLoop]: === Iteration 8 === [dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW, gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW]=== [2020-10-20 06:28:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-20 06:28:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash -689864900, now seen corresponding path program 1 times [2020-10-20 06:28:37,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-20 06:28:37,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167777508] [2020-10-20 06:28:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-20 06:28:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-20 06:28:37,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 06:28:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-10-20 06:28:37,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,831 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-20 06:28:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167777508] [2020-10-20 06:28:37,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952100017] [2020-10-20 06:28:37,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:37,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-20 06:28:37,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-20 06:28:37,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-20 06:28:38,096 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-20 06:28:38,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-20 06:28:38,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 21 [2020-10-20 06:28:38,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119843453] [2020-10-20 06:28:38,098 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-20 06:28:38,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-20 06:28:38,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-20 06:28:38,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2020-10-20 06:28:38,099 INFO L87 Difference]: Start difference. First operand 43 states and 51 transitions. Second operand 11 states. [2020-10-20 06:28:38,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-20 06:28:38,301 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2020-10-20 06:28:38,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-20 06:28:38,302 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-10-20 06:28:38,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-20 06:28:38,303 INFO L225 Difference]: With dead ends: 43 [2020-10-20 06:28:38,303 INFO L226 Difference]: Without dead ends: 0 [2020-10-20 06:28:38,304 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=590, Unknown=0, NotChecked=0, Total=650 [2020-10-20 06:28:38,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-20 06:28:38,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-20 06:28:38,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-20 06:28:38,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-20 06:28:38,305 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 37 [2020-10-20 06:28:38,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-20 06:28:38,306 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-20 06:28:38,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-20 06:28:38,306 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-20 06:28:38,306 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-20 06:28:38,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-20 06:28:38,519 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-20 06:28:38,779 INFO L274 CegarLoopResult]: For program point L33(lines 33 35) no Hoare annotation was computed. [2020-10-20 06:28:38,779 INFO L274 CegarLoopResult]: For program point dividesFINAL(lines 32 40) no Hoare annotation was computed. [2020-10-20 06:28:38,780 INFO L274 CegarLoopResult]: For program point dividesErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2020-10-20 06:28:38,780 INFO L274 CegarLoopResult]: For program point dividesEXIT(lines 32 40) no Hoare annotation was computed. [2020-10-20 06:28:38,780 INFO L274 CegarLoopResult]: For program point dividesErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 39) no Hoare annotation was computed. [2020-10-20 06:28:38,780 INFO L274 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-10-20 06:28:38,780 INFO L274 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-10-20 06:28:38,781 INFO L270 CegarLoopResult]: At program point L39-2(line 39) the Hoare annotation is: (let ((.cse0 (not (<= 1 |divides_#in~n|)))) (and (or .cse0 (not (<= |divides_#in~m| 2147483646)) (<= divides_~m 2147483646)) (or .cse0 (not (<= |divides_#in~m| 2147483647)) (and (<= divides_~n divides_~m) (<= 1 divides_~n) (<= divides_~m 2147483647))))) [2020-10-20 06:28:38,781 INFO L274 CegarLoopResult]: For program point L36(lines 36 38) no Hoare annotation was computed. [2020-10-20 06:28:38,781 INFO L274 CegarLoopResult]: For program point L39-3(line 39) no Hoare annotation was computed. [2020-10-20 06:28:38,781 INFO L277 CegarLoopResult]: At program point dividesENTRY(lines 32 40) the Hoare annotation is: true [2020-10-20 06:28:38,781 INFO L274 CegarLoopResult]: For program point gcdEXIT(lines 17 29) no Hoare annotation was computed. [2020-10-20 06:28:38,781 INFO L274 CegarLoopResult]: For program point L25(lines 25 27) no Hoare annotation was computed. [2020-10-20 06:28:38,781 INFO L274 CegarLoopResult]: For program point gcdErr3ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point gcdErr1ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point gcdFINAL(lines 17 29) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point L28(line 28) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point L28-1(line 28) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L274 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-10-20 06:28:38,782 INFO L270 CegarLoopResult]: At program point L28-2(line 28) the Hoare annotation is: (or (not (<= |gcd_#in~y1| 2147483647)) (not (<= |gcd_#in~y2| 2147483647)) (and (<= gcd_~y1 (+ gcd_~y2 2147483646)) (< 0 gcd_~y1) (<= gcd_~y2 2147483647) (= gcd_~y1 |gcd_#in~y1|))) [2020-10-20 06:28:38,783 INFO L274 CegarLoopResult]: For program point gcdErr0ASSERT_VIOLATIONINTEGER_OVERFLOW(line 26) no Hoare annotation was computed. [2020-10-20 06:28:38,783 INFO L274 CegarLoopResult]: For program point L26-1(line 26) no Hoare annotation was computed. [2020-10-20 06:28:38,783 INFO L274 CegarLoopResult]: For program point L28-3(line 28) no Hoare annotation was computed. [2020-10-20 06:28:38,783 INFO L270 CegarLoopResult]: At program point L26-2(line 26) the Hoare annotation is: (or (not (<= |gcd_#in~y1| 2147483647)) (not (<= |gcd_#in~y2| 2147483647)) (and (<= gcd_~y1 (+ gcd_~y2 2147483646)) (< 0 gcd_~y1) (<= gcd_~y2 2147483647) (= gcd_~y1 |gcd_#in~y1|))) [2020-10-20 06:28:38,783 INFO L277 CegarLoopResult]: At program point gcdENTRY(lines 17 29) the Hoare annotation is: true [2020-10-20 06:28:38,783 INFO L274 CegarLoopResult]: For program point L26-3(line 26) no Hoare annotation was computed. [2020-10-20 06:28:38,783 INFO L274 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point gcdErr2ASSERT_VIOLATIONINTEGER_OVERFLOW(line 28) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point L18-2(lines 17 29) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point L54(line 54) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L270 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: (and (<= ULTIMATE.start_main_~m~0 2147483647) (<= ULTIMATE.start_main_~n~0 2147483647)) [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-10-20 06:28:38,784 INFO L274 CegarLoopResult]: For program point L48(lines 48 50) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L270 CegarLoopResult]: At program point L42(lines 42 59) the Hoare annotation is: (<= ULTIMATE.start_main_~m~0 2147483647) [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point L3(line 3) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-20 06:28:38,785 INFO L270 CegarLoopResult]: At program point L53(line 53) the Hoare annotation is: (and (<= ULTIMATE.start_main_~m~0 2147483647) (<= ULTIMATE.start_main_~n~0 2147483647) (<= 1 ULTIMATE.start_main_~z~0)) [2020-10-20 06:28:38,785 INFO L274 CegarLoopResult]: For program point L53-1(line 53) no Hoare annotation was computed. [2020-10-20 06:28:38,786 INFO L274 CegarLoopResult]: For program point L51(lines 51 58) no Hoare annotation was computed. [2020-10-20 06:28:38,786 INFO L274 CegarLoopResult]: For program point L53-2(lines 53 57) no Hoare annotation was computed. [2020-10-20 06:28:38,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.10 06:28:38 BoogieIcfgContainer [2020-10-20 06:28:38,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-20 06:28:38,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-20 06:28:38,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-20 06:28:38,803 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-20 06:28:38,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.10 06:28:34" (3/4) ... [2020-10-20 06:28:38,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-10-20 06:28:38,815 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure divides [2020-10-20 06:28:38,815 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure gcd [2020-10-20 06:28:38,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-10-20 06:28:38,821 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2020-10-20 06:28:38,822 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:28:38,822 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-10-20 06:28:38,880 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-20 06:28:38,880 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-20 06:28:38,883 INFO L168 Benchmark]: Toolchain (without parser) took 5696.81 ms. Allocated memory was 39.8 MB in the beginning and 59.8 MB in the end (delta: 19.9 MB). Free memory was 18.7 MB in the beginning and 23.3 MB in the end (delta: -4.6 MB). Peak memory consumption was 15.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,884 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 30.9 MB. Free memory was 6.2 MB in the beginning and 6.2 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,884 INFO L168 Benchmark]: CACSL2BoogieTranslator took 345.39 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 17.9 MB in the beginning and 18.6 MB in the end (delta: -693.5 kB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,885 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.31 ms. Allocated memory is still 40.9 MB. Free memory was 18.4 MB in the beginning and 16.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,886 INFO L168 Benchmark]: Boogie Preprocessor took 49.33 ms. Allocated memory is still 40.9 MB. Free memory was 16.8 MB in the beginning and 15.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,886 INFO L168 Benchmark]: RCFGBuilder took 530.27 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 15.4 MB in the beginning and 11.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,887 INFO L168 Benchmark]: TraceAbstraction took 4631.58 ms. Allocated memory was 41.4 MB in the beginning and 59.8 MB in the end (delta: 18.4 MB). Free memory was 11.3 MB in the beginning and 27.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,888 INFO L168 Benchmark]: Witness Printer took 77.30 ms. Allocated memory is still 59.8 MB. Free memory was 27.2 MB in the beginning and 23.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. [2020-10-20 06:28:38,891 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 30.9 MB. Free memory was 6.2 MB in the beginning and 6.2 MB in the end (delta: 41.7 kB). Peak memory consumption was 41.7 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 345.39 ms. Allocated memory was 39.8 MB in the beginning and 40.9 MB in the end (delta: 1.0 MB). Free memory was 17.9 MB in the beginning and 18.6 MB in the end (delta: -693.5 kB). Peak memory consumption was 8.2 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 52.31 ms. Allocated memory is still 40.9 MB. Free memory was 18.4 MB in the beginning and 16.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 49.33 ms. Allocated memory is still 40.9 MB. Free memory was 16.8 MB in the beginning and 15.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 14.3 GB. * RCFGBuilder took 530.27 ms. Allocated memory was 40.9 MB in the beginning and 41.4 MB in the end (delta: 524.3 kB). Free memory was 15.4 MB in the beginning and 11.7 MB in the end (delta: 3.7 MB). Peak memory consumption was 4.8 MB. Max. memory is 14.3 GB. * TraceAbstraction took 4631.58 ms. Allocated memory was 41.4 MB in the beginning and 59.8 MB in the end (delta: 18.4 MB). Free memory was 11.3 MB in the beginning and 27.2 MB in the end (delta: -15.9 MB). Peak memory consumption was 19.7 MB. Max. memory is 14.3 GB. * Witness Printer took 77.30 ms. Allocated memory is still 59.8 MB. Free memory was 27.2 MB in the beginning and 23.3 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 39]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 28]: integer overflow can never occur For all program executions holds that integer overflow can never occur at this location - PositiveResult [Line: 26]: 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: 42]: Loop Invariant Derived loop invariant: m <= 2147483647 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 46 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 157 SDtfs, 185 SDslu, 587 SDs, 0 SdLazy, 877 SolverSat, 29 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 178 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 7 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 38 PreInvPairs, 47 NumberOfFragments, 102 HoareAnnotationTreeSize, 38 FomulaSimplifications, 47 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 76 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.6s InterpolantComputationTime, 258 NumberOfCodeBlocks, 258 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 247 ConstructedInterpolants, 0 QuantifiedInterpolants, 22645 SizeOfPredicates, 11 NumberOfNonLiveVariables, 326 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 11 InterpolantComputations, 8 PerfectInterpolantSequences, 43/55 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...