./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Addition01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 20ed64ec 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_1.5.800.v20200727-1323.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/Addition01-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0c2780d79847d31970febd5cb46fb7efe933c8ec ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-26 08:45:51,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-26 08:45:51,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-26 08:45:51,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-26 08:45:51,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-26 08:45:51,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-26 08:45:51,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-26 08:45:51,177 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-26 08:45:51,178 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-26 08:45:51,179 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-26 08:45:51,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-26 08:45:51,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-26 08:45:51,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-26 08:45:51,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-26 08:45:51,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-26 08:45:51,185 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-26 08:45:51,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-26 08:45:51,187 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-26 08:45:51,189 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-26 08:45:51,191 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-26 08:45:51,192 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-26 08:45:51,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-26 08:45:51,195 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-26 08:45:51,196 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-26 08:45:51,199 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-26 08:45:51,199 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-26 08:45:51,200 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-26 08:45:51,201 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-26 08:45:51,201 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-26 08:45:51,202 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-26 08:45:51,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-26 08:45:51,203 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-26 08:45:51,204 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-26 08:45:51,205 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-26 08:45:51,206 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-26 08:45:51,206 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-26 08:45:51,207 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-26 08:45:51,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-26 08:45:51,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-26 08:45:51,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-26 08:45:51,209 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-26 08:45:51,210 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-26 08:45:51,237 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-26 08:45:51,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-26 08:45:51,239 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-26 08:45:51,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-26 08:45:51,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-26 08:45:51,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-26 08:45:51,242 INFO L138 SettingsManager]: * Use SBE=true [2021-08-26 08:45:51,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-26 08:45:51,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-26 08:45:51,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-26 08:45:51,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-26 08:45:51,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-26 08:45:51,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-26 08:45:51,244 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-26 08:45:51,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-26 08:45:51,244 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-26 08:45:51,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-26 08:45:51,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-26 08:45:51,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-26 08:45:51,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-26 08:45:51,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-26 08:45:51,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-26 08:45:51,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 08:45:51,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-26 08:45:51,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-26 08:45:51,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-26 08:45:51,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-26 08:45:51,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-26 08:45:51,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-26 08:45:51,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-26 08:45:51,247 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c2780d79847d31970febd5cb46fb7efe933c8ec [2021-08-26 08:45:51,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-26 08:45:51,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-26 08:45:51,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-26 08:45:51,628 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-26 08:45:51,629 INFO L275 PluginConnector]: CDTParser initialized [2021-08-26 08:45:51,630 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Addition01-2.c [2021-08-26 08:45:51,697 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1d43000/748327a4859840a69a16989b5f3e1e71/FLAG0d7e413cb [2021-08-26 08:45:52,161 INFO L306 CDTParser]: Found 1 translation units. [2021-08-26 08:45:52,161 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c [2021-08-26 08:45:52,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1d43000/748327a4859840a69a16989b5f3e1e71/FLAG0d7e413cb [2021-08-26 08:45:52,601 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ab1d43000/748327a4859840a69a16989b5f3e1e71 [2021-08-26 08:45:52,603 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-26 08:45:52,605 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-26 08:45:52,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-26 08:45:52,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-26 08:45:52,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-26 08:45:52,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,626 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e241864 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52, skipping insertion in model container [2021-08-26 08:45:52,626 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-26 08:45:52,659 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-26 08:45:52,776 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2021-08-26 08:45:52,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 08:45:52,791 INFO L203 MainTranslator]: Completed pre-run [2021-08-26 08:45:52,806 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Addition01-2.c[1126,1139] [2021-08-26 08:45:52,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-26 08:45:52,818 INFO L208 MainTranslator]: Completed translation [2021-08-26 08:45:52,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52 WrapperNode [2021-08-26 08:45:52,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-26 08:45:52,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-26 08:45:52,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-26 08:45:52,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-26 08:45:52,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,833 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,851 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-26 08:45:52,853 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-26 08:45:52,853 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-26 08:45:52,853 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-26 08:45:52,863 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,875 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,903 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,905 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,906 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,912 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-26 08:45:52,913 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-26 08:45:52,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-26 08:45:52,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-26 08:45:52,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (1/1) ... [2021-08-26 08:45:52,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-26 08:45:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:45:52,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-26 08:45:52,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-26 08:45:52,988 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-26 08:45:52,988 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-26 08:45:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-26 08:45:52,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-26 08:45:52,990 INFO L130 BoogieDeclarations]: Found specification of procedure addition [2021-08-26 08:45:52,990 INFO L138 BoogieDeclarations]: Found implementation of procedure addition [2021-08-26 08:45:53,276 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-26 08:45:53,276 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-08-26 08:45:53,278 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:45:53 BoogieIcfgContainer [2021-08-26 08:45:53,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-26 08:45:53,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-26 08:45:53,279 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-26 08:45:53,282 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-26 08:45:53,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.08 08:45:52" (1/3) ... [2021-08-26 08:45:53,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733f7b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:45:53, skipping insertion in model container [2021-08-26 08:45:53,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.08 08:45:52" (2/3) ... [2021-08-26 08:45:53,283 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@733f7b95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.08 08:45:53, skipping insertion in model container [2021-08-26 08:45:53,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:45:53" (3/3) ... [2021-08-26 08:45:53,284 INFO L111 eAbstractionObserver]: Analyzing ICFG Addition01-2.c [2021-08-26 08:45:53,289 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-26 08:45:53,289 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-26 08:45:53,349 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-26 08:45:53,354 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-26 08:45:53,355 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-26 08:45:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 08:45:53,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-26 08:45:53,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:45:53,417 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:45:53,417 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:45:53,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:45:53,423 INFO L82 PathProgramCache]: Analyzing trace with hash 663264039, now seen corresponding path program 1 times [2021-08-26 08:45:53,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:45:53,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672606100] [2021-08-26 08:45:53,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:53,432 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:45:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:53,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:45:53,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:45:53,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672606100] [2021-08-26 08:45:53,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672606100] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:45:53,712 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:45:53,713 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-26 08:45:53,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625805068] [2021-08-26 08:45:53,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-26 08:45:53,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:45:53,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-26 08:45:53,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-08-26 08:45:53,732 INFO L87 Difference]: Start difference. First operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 08:45:53,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:45:53,897 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2021-08-26 08:45:53,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-26 08:45:53,899 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-08-26 08:45:53,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:45:53,906 INFO L225 Difference]: With dead ends: 34 [2021-08-26 08:45:53,906 INFO L226 Difference]: Without dead ends: 21 [2021-08-26 08:45:53,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-26 08:45:53,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-26 08:45:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-26 08:45:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 08:45:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-08-26 08:45:53,941 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2021-08-26 08:45:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:45:53,942 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-08-26 08:45:53,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 08:45:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-08-26 08:45:53,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-26 08:45:53,944 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:45:53,944 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:45:53,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-26 08:45:53,945 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:45:53,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:45:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1508496640, now seen corresponding path program 1 times [2021-08-26 08:45:53,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:45:53,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008951870] [2021-08-26 08:45:53,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:53,947 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:45:53,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:53,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:54,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-26 08:45:54,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:45:54,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008951870] [2021-08-26 08:45:54,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008951870] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-26 08:45:54,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-26 08:45:54,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-26 08:45:54,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504126746] [2021-08-26 08:45:54,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-26 08:45:54,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:45:54,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-26 08:45:54,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 08:45:54,027 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 08:45:54,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:45:54,053 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2021-08-26 08:45:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-26 08:45:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-08-26 08:45:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:45:54,055 INFO L225 Difference]: With dead ends: 31 [2021-08-26 08:45:54,056 INFO L226 Difference]: Without dead ends: 23 [2021-08-26 08:45:54,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-26 08:45:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-26 08:45:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2021-08-26 08:45:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 08:45:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-08-26 08:45:54,063 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 14 [2021-08-26 08:45:54,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:45:54,063 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-08-26 08:45:54,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-08-26 08:45:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-08-26 08:45:54,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-26 08:45:54,065 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:45:54,065 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:45:54,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-26 08:45:54,065 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:45:54,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:45:54,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1330690599, now seen corresponding path program 1 times [2021-08-26 08:45:54,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:45:54,066 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250479393] [2021-08-26 08:45:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:54,067 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:45:54,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:54,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:54,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:54,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-26 08:45:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-26 08:45:54,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:45:54,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250479393] [2021-08-26 08:45:54,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250479393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:54,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285417555] [2021-08-26 08:45:54,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:54,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:45:54,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:45:54,364 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 08:45:54,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-26 08:45:54,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:54,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-26 08:45:54,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 08:45:54,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 08:45:54,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285417555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:54,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 08:45:54,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-26 08:45:54,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325040368] [2021-08-26 08:45:54,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-26 08:45:54,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:45:54,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-26 08:45:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2021-08-26 08:45:54,998 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 08:45:55,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:45:55,290 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2021-08-26 08:45:55,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-26 08:45:55,291 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 19 [2021-08-26 08:45:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:45:55,294 INFO L225 Difference]: With dead ends: 35 [2021-08-26 08:45:55,295 INFO L226 Difference]: Without dead ends: 29 [2021-08-26 08:45:55,295 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 360.0ms TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-26 08:45:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-26 08:45:55,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 22. [2021-08-26 08:45:55,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2021-08-26 08:45:55,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-08-26 08:45:55,308 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 19 [2021-08-26 08:45:55,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:45:55,309 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-08-26 08:45:55,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-08-26 08:45:55,309 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-08-26 08:45:55,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-26 08:45:55,311 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:45:55,311 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:45:55,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-26 08:45:55,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:45:55,527 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:45:55,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:45:55,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1159446067, now seen corresponding path program 1 times [2021-08-26 08:45:55,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:45:55,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866977783] [2021-08-26 08:45:55,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:55,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:45:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:55,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:55,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 08:45:55,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:45:55,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866977783] [2021-08-26 08:45:55,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866977783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:55,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270809842] [2021-08-26 08:45:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:55,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:45:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:45:55,644 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 08:45:55,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-26 08:45:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 08:45:55,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 08:45:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-26 08:45:55,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270809842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:55,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 08:45:55,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-26 08:45:55,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441509822] [2021-08-26 08:45:55,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 08:45:55,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:45:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 08:45:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 08:45:55,832 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 7 states, 5 states have (on average 4.0) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 08:45:55,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:45:55,901 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2021-08-26 08:45:55,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 08:45:55,901 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2021-08-26 08:45:55,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:45:55,902 INFO L225 Difference]: With dead ends: 28 [2021-08-26 08:45:55,903 INFO L226 Difference]: Without dead ends: 24 [2021-08-26 08:45:55,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 08:45:55,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-26 08:45:55,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-26 08:45:55,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-08-26 08:45:55,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-08-26 08:45:55,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 20 [2021-08-26 08:45:55,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:45:55,909 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-08-26 08:45:55,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.0) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-08-26 08:45:55,909 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-08-26 08:45:55,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-26 08:45:55,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-26 08:45:55,910 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-26 08:45:55,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-26 08:45:56,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-26 08:45:56,125 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-26 08:45:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-26 08:45:56,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1187670683, now seen corresponding path program 1 times [2021-08-26 08:45:56,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-26 08:45:56,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743808046] [2021-08-26 08:45:56,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:56,126 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-26 08:45:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:56,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:56,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-08-26 08:45:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:56,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-08-26 08:45:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:56,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 08:45:56,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-26 08:45:56,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743808046] [2021-08-26 08:45:56,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743808046] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:56,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769212928] [2021-08-26 08:45:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-26 08:45:56,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:45:56,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-26 08:45:56,241 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-26 08:45:56,245 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-26 08:45:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-26 08:45:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-26 08:45:56,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-26 08:45:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-26 08:45:56,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769212928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-26 08:45:56,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-26 08:45:56,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-08-26 08:45:56,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125455043] [2021-08-26 08:45:56,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-26 08:45:56,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-26 08:45:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-26 08:45:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-26 08:45:56,436 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-26 08:45:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-26 08:45:56,482 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2021-08-26 08:45:56,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-26 08:45:56,482 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 27 [2021-08-26 08:45:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-26 08:45:56,483 INFO L225 Difference]: With dead ends: 29 [2021-08-26 08:45:56,483 INFO L226 Difference]: Without dead ends: 0 [2021-08-26 08:45:56,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-08-26 08:45:56,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-08-26 08:45:56,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-08-26 08:45:56,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-26 08:45:56,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-08-26 08:45:56,484 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2021-08-26 08:45:56,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-26 08:45:56,484 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-08-26 08:45:56,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 4.8) internal successors, (24), 7 states have internal predecessors, (24), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-08-26 08:45:56,485 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-08-26 08:45:56,485 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-08-26 08:45:56,487 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-26 08:45:56,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-26 08:45:56,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-26 08:45:56,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-08-26 08:45:56,713 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,715 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,718 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,725 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,728 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,729 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,730 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-08-26 08:45:56,759 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-08-26 08:45:56,759 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-08-26 08:45:56,759 INFO L857 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2021-08-26 08:45:56,760 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-08-26 08:45:56,760 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-08-26 08:45:56,760 INFO L860 garLoopResultBuilder]: At program point L28(lines 28 47) the Hoare annotation is: true [2021-08-26 08:45:56,760 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2021-08-26 08:45:56,760 INFO L857 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2021-08-26 08:45:56,761 INFO L857 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2021-08-26 08:45:56,761 INFO L853 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: (<= 0 ULTIMATE.start_main_~n~0) [2021-08-26 08:45:56,761 INFO L857 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2021-08-26 08:45:56,761 INFO L857 garLoopResultBuilder]: For program point L36(lines 36 40) no Hoare annotation was computed. [2021-08-26 08:45:56,761 INFO L853 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (= |addition_#in~m| addition_~m) (<= (+ addition_~n 1) 0) (= |addition_#in~n| addition_~n)) [2021-08-26 08:45:56,762 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 24) no Hoare annotation was computed. [2021-08-26 08:45:56,762 INFO L857 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-08-26 08:45:56,762 INFO L857 garLoopResultBuilder]: For program point additionFINAL(lines 15 25) no Hoare annotation was computed. [2021-08-26 08:45:56,762 INFO L853 garLoopResultBuilder]: At program point L20(line 20) the Hoare annotation is: (and (= |addition_#in~m| addition_~m) (<= 1 addition_~n) (= |addition_#in~n| addition_~n)) [2021-08-26 08:45:56,762 INFO L857 garLoopResultBuilder]: For program point L19(lines 19 21) no Hoare annotation was computed. [2021-08-26 08:45:56,762 INFO L857 garLoopResultBuilder]: For program point L20-1(line 20) no Hoare annotation was computed. [2021-08-26 08:45:56,763 INFO L857 garLoopResultBuilder]: For program point L16(lines 16 18) no Hoare annotation was computed. [2021-08-26 08:45:56,763 INFO L860 garLoopResultBuilder]: At program point additionENTRY(lines 15 25) the Hoare annotation is: true [2021-08-26 08:45:56,763 INFO L857 garLoopResultBuilder]: For program point additionEXIT(lines 15 25) no Hoare annotation was computed. [2021-08-26 08:45:56,767 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-26 08:45:56,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 26.08 08:45:56 BoogieIcfgContainer [2021-08-26 08:45:56,773 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-26 08:45:56,774 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-26 08:45:56,774 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-26 08:45:56,774 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-26 08:45:56,775 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.08 08:45:53" (3/4) ... [2021-08-26 08:45:56,778 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-08-26 08:45:56,783 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure addition [2021-08-26 08:45:56,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 9 nodes and edges [2021-08-26 08:45:56,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-08-26 08:45:56,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 08:45:56,787 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-08-26 08:45:56,815 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-26 08:45:56,816 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-26 08:45:56,817 INFO L168 Benchmark]: Toolchain (without parser) took 4211.47 ms. Allocated memory was 52.4 MB in the beginning and 92.3 MB in the end (delta: 39.8 MB). Free memory was 29.9 MB in the beginning and 51.2 MB in the end (delta: -21.2 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,817 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-26 08:45:56,818 INFO L168 Benchmark]: CACSL2BoogieTranslator took 213.49 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.7 MB in the beginning and 42.5 MB in the end (delta: -12.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,818 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.28 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 47.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,819 INFO L168 Benchmark]: Boogie Preprocessor took 59.53 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 46.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,819 INFO L168 Benchmark]: RCFGBuilder took 365.07 ms. Allocated memory is still 62.9 MB. Free memory was 46.0 MB in the beginning and 33.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,819 INFO L168 Benchmark]: TraceAbstraction took 3494.45 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 32.8 MB in the beginning and 53.3 MB in the end (delta: -20.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,820 INFO L168 Benchmark]: Witness Printer took 41.72 ms. Allocated memory is still 92.3 MB. Free memory was 53.3 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-26 08:45:56,822 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory was 34.9 MB in the beginning and 34.9 MB in the end (delta: 26.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 213.49 ms. Allocated memory was 52.4 MB in the beginning and 62.9 MB in the end (delta: 10.5 MB). Free memory was 29.7 MB in the beginning and 42.5 MB in the end (delta: -12.8 MB). Peak memory consumption was 5.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.28 ms. Allocated memory is still 62.9 MB. Free memory was 42.5 MB in the beginning and 47.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 59.53 ms. Allocated memory is still 62.9 MB. Free memory was 47.2 MB in the beginning and 46.2 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 365.07 ms. Allocated memory is still 62.9 MB. Free memory was 46.0 MB in the beginning and 33.2 MB in the end (delta: 12.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3494.45 ms. Allocated memory was 62.9 MB in the beginning and 92.3 MB in the end (delta: 29.4 MB). Free memory was 32.8 MB in the beginning and 53.3 MB in the end (delta: -20.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 16.1 GB. * Witness Printer took 41.72 ms. Allocated memory is still 92.3 MB. Free memory was 53.3 MB in the beginning and 51.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3419.4ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 22.8ms, AutomataDifference: 638.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 49.5ms, InitialAbstractionConstructionTime: 43.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 84 SDtfs, 69 SDslu, 168 SDs, 0 SdLazy, 291 SolverSat, 18 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 295.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 526.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=24occurred in iteration=4, InterpolantAutomatonStates: 33, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 44.5ms AutomataMinimizationTime, 5 MinimizatonAttempts, 9 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 11 PreInvPairs, 13 NumberOfFragments, 27 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 18.4ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 11 FormulaSimplificationTreeSizeReductionInter, 25.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 41.8ms SsaConstructionTime, 147.9ms SatisfiabilityAnalysisTime, 1458.7ms InterpolantComputationTime, 158 NumberOfCodeBlocks, 158 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 150 ConstructedInterpolants, 0 QuantifiedInterpolants, 487 SizeOfPredicates, 9 NumberOfNonLiveVariables, 276 ConjunctsInSsa, 35 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 33/42 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-08-26 08:45:56,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...