./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/sum01-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/loops/sum01-1.i -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 b8288a9de178793ff8226fcaf13a19528a323382cd8b50b54e8a1ad5ce998241 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 09:38:17,122 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 09:38:17,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 09:38:17,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 09:38:17,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 09:38:17,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 09:38:17,174 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 09:38:17,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 09:38:17,179 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 09:38:17,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 09:38:17,184 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 09:38:17,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 09:38:17,185 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 09:38:17,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 09:38:17,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 09:38:17,188 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 09:38:17,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 09:38:17,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 09:38:17,192 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 09:38:17,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 09:38:17,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 09:38:17,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 09:38:17,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 09:38:17,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 09:38:17,204 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 09:38:17,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 09:38:17,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 09:38:17,205 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 09:38:17,206 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 09:38:17,206 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 09:38:17,207 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 09:38:17,207 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 09:38:17,208 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 09:38:17,209 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 09:38:17,210 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 09:38:17,210 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 09:38:17,211 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 09:38:17,211 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 09:38:17,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 09:38:17,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 09:38:17,212 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 09:38:17,213 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 09:38:17,241 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 09:38:17,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 09:38:17,243 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 09:38:17,243 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 09:38:17,244 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 09:38:17,244 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 09:38:17,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 09:38:17,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 09:38:17,244 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 09:38:17,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 09:38:17,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 09:38:17,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 09:38:17,247 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 09:38:17,247 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 09:38:17,247 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 09:38:17,247 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 09:38:17,247 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 09:38:17,247 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:38:17,248 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 09:38:17,248 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 09:38:17,249 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 09:38:17,249 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 09:38:17,249 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 09:38:17,249 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b8288a9de178793ff8226fcaf13a19528a323382cd8b50b54e8a1ad5ce998241 [2021-12-17 09:38:17,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 09:38:17,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 09:38:17,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 09:38:17,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 09:38:17,451 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 09:38:17,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/sum01-1.i [2021-12-17 09:38:17,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8934c75/e95b042d19e34722bd81fa87ecf5d968/FLAGf24815b4a [2021-12-17 09:38:17,865 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 09:38:17,865 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i [2021-12-17 09:38:17,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8934c75/e95b042d19e34722bd81fa87ecf5d968/FLAGf24815b4a [2021-12-17 09:38:17,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8934c75/e95b042d19e34722bd81fa87ecf5d968 [2021-12-17 09:38:17,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 09:38:17,891 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 09:38:17,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 09:38:17,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 09:38:17,895 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 09:38:17,895 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:38:17" (1/1) ... [2021-12-17 09:38:17,896 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51c6ebc2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:17, skipping insertion in model container [2021-12-17 09:38:17,896 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 09:38:17" (1/1) ... [2021-12-17 09:38:17,900 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 09:38:17,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 09:38:18,041 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i[808,821] [2021-12-17 09:38:18,051 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:38:18,057 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 09:38:18,066 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/sum01-1.i[808,821] [2021-12-17 09:38:18,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 09:38:18,079 INFO L208 MainTranslator]: Completed translation [2021-12-17 09:38:18,080 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18 WrapperNode [2021-12-17 09:38:18,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 09:38:18,082 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 09:38:18,082 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 09:38:18,082 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 09:38:18,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,103 INFO L137 Inliner]: procedures = 15, calls = 7, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 30 [2021-12-17 09:38:18,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 09:38:18,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 09:38:18,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 09:38:18,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 09:38:18,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,111 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,111 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 09:38:18,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 09:38:18,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 09:38:18,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 09:38:18,124 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (1/1) ... [2021-12-17 09:38:18,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 09:38:18,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:38:18,156 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) [2021-12-17 09:38:18,159 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 [2021-12-17 09:38:18,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 09:38:18,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 09:38:18,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 09:38:18,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 09:38:18,220 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 09:38:18,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 09:38:18,317 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 09:38:18,321 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 09:38:18,321 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 09:38:18,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:38:18 BoogieIcfgContainer [2021-12-17 09:38:18,323 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 09:38:18,324 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 09:38:18,324 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 09:38:18,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 09:38:18,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 09:38:17" (1/3) ... [2021-12-17 09:38:18,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6975ea32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:38:18, skipping insertion in model container [2021-12-17 09:38:18,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 09:38:18" (2/3) ... [2021-12-17 09:38:18,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6975ea32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 09:38:18, skipping insertion in model container [2021-12-17 09:38:18,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:38:18" (3/3) ... [2021-12-17 09:38:18,329 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2021-12-17 09:38:18,335 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 09:38:18,335 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 09:38:18,362 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 09:38:18,368 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, mAutomataTypeConcurrency=PETRI_NET, 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 [2021-12-17 09:38:18,369 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 09:38:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) [2021-12-17 09:38:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:38:18,382 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:18,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:38:18,383 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:18,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:18,390 INFO L85 PathProgramCache]: Analyzing trace with hash 889937703, now seen corresponding path program 1 times [2021-12-17 09:38:18,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:18,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665738422] [2021-12-17 09:38:18,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:18,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:18,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:38:18,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665738422] [2021-12-17 09:38:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665738422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:38:18,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:38:18,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 09:38:18,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598599488] [2021-12-17 09:38:18,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:38:18,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 09:38:18,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:38:18,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 09:38:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:38:18,524 INFO L87 Difference]: Start difference. First operand has 13 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 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) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 09:38:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:38:18,533 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-12-17 09:38:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 09:38:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) Word has length 6 [2021-12-17 09:38:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:38:18,539 INFO L225 Difference]: With dead ends: 21 [2021-12-17 09:38:18,540 INFO L226 Difference]: Without dead ends: 9 [2021-12-17 09:38:18,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 09:38:18,545 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:38:18,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:38:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-17 09:38:18,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-17 09:38:18,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 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) [2021-12-17 09:38:18,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-12-17 09:38:18,564 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-12-17 09:38:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:38:18,564 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-12-17 09:38:18,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-17 09:38:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-12-17 09:38:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-17 09:38:18,565 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:18,565 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-17 09:38:18,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 09:38:18,566 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 889610002, now seen corresponding path program 1 times [2021-12-17 09:38:18,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:18,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196179132] [2021-12-17 09:38:18,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:18,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:18,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:18,672 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:38:18,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196179132] [2021-12-17 09:38:18,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196179132] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 09:38:18,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 09:38:18,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 09:38:18,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906316920] [2021-12-17 09:38:18,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 09:38:18,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 09:38:18,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:38:18,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 09:38:18,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 09:38:18,689 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-17 09:38:18,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:38:18,730 INFO L93 Difference]: Finished difference Result 16 states and 18 transitions. [2021-12-17 09:38:18,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 09:38:18,731 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) Word has length 6 [2021-12-17 09:38:18,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:38:18,731 INFO L225 Difference]: With dead ends: 16 [2021-12-17 09:38:18,732 INFO L226 Difference]: Without dead ends: 12 [2021-12-17 09:38:18,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 09:38:18,733 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:38:18,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 18 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:38:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-17 09:38:18,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-17 09:38:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-12-17 09:38:18,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 14 transitions. [2021-12-17 09:38:18,739 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 14 transitions. Word has length 6 [2021-12-17 09:38:18,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:38:18,740 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 14 transitions. [2021-12-17 09:38:18,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2021-12-17 09:38:18,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 14 transitions. [2021-12-17 09:38:18,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-17 09:38:18,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:18,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:38:18,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 09:38:18,744 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:18,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:18,744 INFO L85 PathProgramCache]: Analyzing trace with hash -332619814, now seen corresponding path program 1 times [2021-12-17 09:38:18,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:18,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530139692] [2021-12-17 09:38:18,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:18,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:18,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:18,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:18,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:38:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530139692] [2021-12-17 09:38:18,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530139692] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:38:18,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533093454] [2021-12-17 09:38:18,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:18,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:38:18,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:38:18,948 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) [2021-12-17 09:38:18,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 09:38:18,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:18,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-17 09:38:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:38:19,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:19,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:38:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:19,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533093454] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:38:19,355 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:38:19,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2021-12-17 09:38:19,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356333341] [2021-12-17 09:38:19,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:38:19,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 09:38:19,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:38:19,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 09:38:19,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-12-17 09:38:19,361 INFO L87 Difference]: Start difference. First operand 12 states and 14 transitions. Second operand has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-17 09:38:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:38:19,530 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2021-12-17 09:38:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-17 09:38:19,531 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) Word has length 9 [2021-12-17 09:38:19,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:38:19,531 INFO L225 Difference]: With dead ends: 31 [2021-12-17 09:38:19,531 INFO L226 Difference]: Without dead ends: 17 [2021-12-17 09:38:19,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-12-17 09:38:19,533 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:38:19,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 19 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:38:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-12-17 09:38:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2021-12-17 09:38:19,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 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) [2021-12-17 09:38:19,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-12-17 09:38:19,536 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 9 [2021-12-17 09:38:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:38:19,536 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-12-17 09:38:19,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2021-12-17 09:38:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-12-17 09:38:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-17 09:38:19,537 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:19,537 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-12-17 09:38:19,563 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 09:38:19,751 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 [2021-12-17 09:38:19,752 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1577964762, now seen corresponding path program 2 times [2021-12-17 09:38:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198230288] [2021-12-17 09:38:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:19,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:19,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 09:38:19,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:38:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198230288] [2021-12-17 09:38:19,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198230288] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:38:19,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359438208] [2021-12-17 09:38:19,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 09:38:19,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:38:19,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:38:19,892 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) [2021-12-17 09:38:19,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 09:38:19,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 09:38:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 09:38:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-17 09:38:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:38:20,181 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:20,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:38:20,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:20,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359438208] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:38:20,470 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:38:20,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2021-12-17 09:38:20,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641572419] [2021-12-17 09:38:20,470 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:38:20,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-12-17 09:38:20,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:38:20,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-12-17 09:38:20,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-12-17 09:38:20,472 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) [2021-12-17 09:38:20,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:38:20,838 INFO L93 Difference]: Finished difference Result 36 states and 43 transitions. [2021-12-17 09:38:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-17 09:38:20,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) Word has length 15 [2021-12-17 09:38:20,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:38:20,841 INFO L225 Difference]: With dead ends: 36 [2021-12-17 09:38:20,841 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 09:38:20,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=314, Invalid=1492, Unknown=0, NotChecked=0, Total=1806 [2021-12-17 09:38:20,844 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 09:38:20,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 49 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 09:38:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 09:38:20,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2021-12-17 09:38:20,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-12-17 09:38:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-12-17 09:38:20,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 15 [2021-12-17 09:38:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:38:20,853 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-12-17 09:38:20,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3214285714285714) internal successors, (37), 28 states have internal predecessors, (37), 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) [2021-12-17 09:38:20,854 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-12-17 09:38:20,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 09:38:20,855 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:20,855 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:38:20,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 09:38:21,063 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 [2021-12-17 09:38:21,064 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:21,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:21,064 INFO L85 PathProgramCache]: Analyzing trace with hash -790824168, now seen corresponding path program 1 times [2021-12-17 09:38:21,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:21,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542802870] [2021-12-17 09:38:21,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:21,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:21,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:21,117 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 09:38:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542802870] [2021-12-17 09:38:21,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542802870] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 09:38:21,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730779938] [2021-12-17 09:38:21,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:21,117 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 09:38:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 09:38:21,119 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) [2021-12-17 09:38:21,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 09:38:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 09:38:21,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 09:38:21,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 09:38:21,199 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:21,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 09:38:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 09:38:21,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730779938] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 09:38:21,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-17 09:38:21,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2021-12-17 09:38:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741508493] [2021-12-17 09:38:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-17 09:38:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-17 09:38:21,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 09:38:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-17 09:38:21,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-17 09:38:21,253 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-12-17 09:38:21,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 09:38:21,280 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2021-12-17 09:38:21,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-17 09:38:21,280 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) Word has length 21 [2021-12-17 09:38:21,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 09:38:21,281 INFO L225 Difference]: With dead ends: 46 [2021-12-17 09:38:21,281 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 09:38:21,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-17 09:38:21,282 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 09:38:21,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 31 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 09:38:21,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 09:38:21,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-12-17 09:38:21,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 states have internal predecessors, (40), 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) [2021-12-17 09:38:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-12-17 09:38:21,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 21 [2021-12-17 09:38:21,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 09:38:21,286 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-12-17 09:38:21,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 12 states have internal predecessors, (39), 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) [2021-12-17 09:38:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-12-17 09:38:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-17 09:38:21,287 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 09:38:21,287 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 09:38:21,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 09:38:21,503 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 [2021-12-17 09:38:21,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 09:38:21,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 09:38:21,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1639196496, now seen corresponding path program 2 times [2021-12-17 09:38:21,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 09:38:21,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042051096] [2021-12-17 09:38:21,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 09:38:21,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 09:38:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:38:21,519 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 09:38:21,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 09:38:21,546 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 09:38:21,554 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 09:38:21,554 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 09:38:21,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 09:38:21,557 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1] [2021-12-17 09:38:21,559 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 09:38:21,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 09:38:21 BoogieIcfgContainer [2021-12-17 09:38:21,593 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 09:38:21,594 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 09:38:21,594 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 09:38:21,594 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 09:38:21,594 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 09:38:18" (3/4) ... [2021-12-17 09:38:21,595 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 09:38:21,627 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 09:38:21,628 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 09:38:21,628 INFO L158 Benchmark]: Toolchain (without parser) took 3737.17ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 63.7MB in the beginning and 58.6MB in the end (delta: 5.1MB). Peak memory consumption was 31.3MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,628 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:38:21,629 INFO L158 Benchmark]: CACSL2BoogieTranslator took 188.01ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 63.3MB in the beginning and 95.9MB in the end (delta: -32.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,629 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.40ms. Allocated memory is still 119.5MB. Free memory was 95.9MB in the beginning and 94.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,629 INFO L158 Benchmark]: Boogie Preprocessor took 18.52ms. Allocated memory is still 119.5MB. Free memory was 94.6MB in the beginning and 93.7MB in the end (delta: 932.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 09:38:21,629 INFO L158 Benchmark]: RCFGBuilder took 199.77ms. Allocated memory is still 119.5MB. Free memory was 93.7MB in the beginning and 84.7MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,629 INFO L158 Benchmark]: TraceAbstraction took 3269.38ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 60.7MB in the end (delta: 23.6MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,630 INFO L158 Benchmark]: Witness Printer took 34.03ms. Allocated memory is still 119.5MB. Free memory was 60.7MB in the beginning and 58.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 09:38:21,631 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 94.4MB. Free memory was 51.9MB in the beginning and 51.9MB in the end (delta: 39.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 188.01ms. Allocated memory was 94.4MB in the beginning and 119.5MB in the end (delta: 25.2MB). Free memory was 63.3MB in the beginning and 95.9MB in the end (delta: -32.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.40ms. Allocated memory is still 119.5MB. Free memory was 95.9MB in the beginning and 94.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.52ms. Allocated memory is still 119.5MB. Free memory was 94.6MB in the beginning and 93.7MB in the end (delta: 932.7kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 199.77ms. Allocated memory is still 119.5MB. Free memory was 93.7MB in the beginning and 84.7MB in the end (delta: 9.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 3269.38ms. Allocated memory is still 119.5MB. Free memory was 84.3MB in the beginning and 60.7MB in the end (delta: 23.6MB). Peak memory consumption was 25.6MB. Max. memory is 16.1GB. * Witness Printer took 34.03ms. Allocated memory is still 119.5MB. Free memory was 60.7MB in the beginning and 58.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 16]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L23] int i, n=__VERIFIER_nondet_uint(), sn=0; [L24] i=1 VAL [i=1, n=0, n=10] [L24] COND TRUE i<=n VAL [i=1, n=10, n=0] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=1, n=2, n=10] [L24] i++ VAL [i=2, n=10, n=2] [L24] COND TRUE i<=n VAL [i=2, n=2, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=2, n=4, n=10] [L24] i++ VAL [i=3, n=4, n=10] [L24] COND TRUE i<=n VAL [i=3, n=4, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=3, n=6, n=10] [L24] i++ VAL [i=4, n=6, n=10] [L24] COND TRUE i<=n VAL [i=4, n=6, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=4, n=8, n=10] [L24] i++ VAL [i=5, n=8, n=10] [L24] COND TRUE i<=n VAL [i=5, n=10, n=8] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=5, n=10, n=10] [L24] i++ VAL [i=6, n=10, n=10] [L24] COND TRUE i<=n VAL [i=6, n=10, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=6, n=12, n=10] [L24] i++ VAL [i=7, n=10, n=12] [L24] COND TRUE i<=n VAL [i=7, n=12, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=7, n=10, n=14] [L24] i++ VAL [i=8, n=10, n=14] [L24] COND TRUE i<=n VAL [i=8, n=14, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=8, n=16, n=10] [L24] i++ VAL [i=9, n=16, n=10] [L24] COND TRUE i<=n VAL [i=9, n=16, n=10] [L25] COND TRUE i<10 [L26] sn = sn + (2) VAL [i=9, n=10, n=18] [L24] i++ VAL [i=10, n=10, n=18] [L24] COND TRUE i<=n VAL [i=10, n=10, n=18] [L25] COND FALSE !(i<10) VAL [i=10, n=18, n=10] [L24] i++ VAL [i=11, n=10, n=18] [L24] COND FALSE !(i<=n) VAL [i=11, n=10, n=18] [L28] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L15] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L16] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.2s, OverallIterations: 6, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 64 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 64 mSDsluCounter, 131 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 95 mSDsCounter, 39 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 363 IncrementalHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 39 mSolverCounterUnsat, 36 mSDtfsCounter, 363 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 139 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=5, InterpolantAutomatonStates: 51, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 4 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 138 NumberOfCodeBlocks, 138 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 136 ConstructedInterpolants, 0 QuantifiedInterpolants, 921 SizeOfPredicates, 10 NumberOfNonLiveVariables, 157 ConjunctsInSsa, 38 ConjunctsInUnsatCore, 11 InterpolantComputations, 2 PerfectInterpolantSequences, 28/144 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 incorrect! [2021-12-17 09:38:21,656 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... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE