./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/rangesum05.i --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/reducercommutativity/rangesum05.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 0bbcd29b379466a58e055ac550736cd77ce56d9c ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-20ed64e [2021-08-25 16:15:45,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-25 16:15:45,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-25 16:15:45,266 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-25 16:15:45,267 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-25 16:15:45,268 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-25 16:15:45,269 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-25 16:15:45,270 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-25 16:15:45,271 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-25 16:15:45,272 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-25 16:15:45,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-25 16:15:45,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-25 16:15:45,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-25 16:15:45,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-25 16:15:45,275 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-25 16:15:45,276 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-25 16:15:45,276 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-25 16:15:45,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-25 16:15:45,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-25 16:15:45,279 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-25 16:15:45,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-25 16:15:45,280 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-25 16:15:45,281 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-25 16:15:45,282 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-25 16:15:45,283 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-25 16:15:45,284 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-25 16:15:45,284 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-25 16:15:45,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-25 16:15:45,285 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-25 16:15:45,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-25 16:15:45,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-25 16:15:45,286 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-25 16:15:45,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-25 16:15:45,287 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-25 16:15:45,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-25 16:15:45,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-25 16:15:45,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-25 16:15:45,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-25 16:15:45,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-25 16:15:45,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-25 16:15:45,290 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-25 16:15:45,291 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-25 16:15:45,305 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-25 16:15:45,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-25 16:15:45,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-25 16:15:45,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-25 16:15:45,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-25 16:15:45,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-25 16:15:45,307 INFO L138 SettingsManager]: * Use SBE=true [2021-08-25 16:15:45,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-25 16:15:45,308 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-25 16:15:45,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-25 16:15:45,320 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-25 16:15:45,321 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-25 16:15:45,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:45,322 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-25 16:15:45,322 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-25 16:15:45,322 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-25 16:15:45,322 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-25 16:15:45,322 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-25 16:15:45,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-25 16:15:45,323 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-25 16:15:45,323 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0bbcd29b379466a58e055ac550736cd77ce56d9c [2021-08-25 16:15:45,568 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-25 16:15:45,595 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-25 16:15:45,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-25 16:15:45,600 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-25 16:15:45,600 INFO L275 PluginConnector]: CDTParser initialized [2021-08-25 16:15:45,601 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-08-25 16:15:45,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308726b18/92e3b9e144b24ab88065f9d8126b9083/FLAG6fe4a4843 [2021-08-25 16:15:46,083 INFO L306 CDTParser]: Found 1 translation units. [2021-08-25 16:15:46,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2021-08-25 16:15:46,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308726b18/92e3b9e144b24ab88065f9d8126b9083/FLAG6fe4a4843 [2021-08-25 16:15:46,096 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/308726b18/92e3b9e144b24ab88065f9d8126b9083 [2021-08-25 16:15:46,097 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-25 16:15:46,098 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-25 16:15:46,100 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:46,101 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-25 16:15:46,103 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-25 16:15:46,103 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,104 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bfa694b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46, skipping insertion in model container [2021-08-25 16:15:46,104 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,113 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-25 16:15:46,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-25 16:15:46,227 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/reducercommutativity/rangesum05.i[1457,1470] [2021-08-25 16:15:46,229 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:46,234 INFO L203 MainTranslator]: Completed pre-run [2021-08-25 16:15:46,260 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/reducercommutativity/rangesum05.i[1457,1470] [2021-08-25 16:15:46,261 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-25 16:15:46,275 INFO L208 MainTranslator]: Completed translation [2021-08-25 16:15:46,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46 WrapperNode [2021-08-25 16:15:46,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-25 16:15:46,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:46,278 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-25 16:15:46,278 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-25 16:15:46,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,311 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-25 16:15:46,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-25 16:15:46,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-25 16:15:46,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-25 16:15:46,317 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,317 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,323 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,325 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-25 16:15:46,337 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-25 16:15:46,337 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-25 16:15:46,337 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-25 16:15:46,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (1/1) ... [2021-08-25 16:15:46,343 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-25 16:15:46,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:46,356 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) [2021-08-25 16:15:46,376 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 [2021-08-25 16:15:46,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-25 16:15:46,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-25 16:15:46,388 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-08-25 16:15:46,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-25 16:15:46,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-25 16:15:46,389 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-08-25 16:15:46,389 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-08-25 16:15:46,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-25 16:15:46,703 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-25 16:15:46,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:46 BoogieIcfgContainer [2021-08-25 16:15:46,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-25 16:15:46,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-25 16:15:46,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-25 16:15:46,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-25 16:15:46,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.08 04:15:46" (1/3) ... [2021-08-25 16:15:46,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f821b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:46, skipping insertion in model container [2021-08-25 16:15:46,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.08 04:15:46" (2/3) ... [2021-08-25 16:15:46,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f821b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.08 04:15:46, skipping insertion in model container [2021-08-25 16:15:46,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:46" (3/3) ... [2021-08-25 16:15:46,715 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2021-08-25 16:15:46,719 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-25 16:15:46,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-25 16:15:46,748 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-25 16:15:46,752 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 [2021-08-25 16:15:46,753 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-08-25 16:15:46,762 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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) [2021-08-25 16:15:46,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-25 16:15:46,766 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:46,767 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:46,767 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:46,771 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-08-25 16:15:46,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:46,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499723325] [2021-08-25 16:15:46,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:46,778 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:46,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:46,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:15:46,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:46,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499723325] [2021-08-25 16:15:46,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499723325] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:46,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:46,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-25 16:15:46,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402709034] [2021-08-25 16:15:46,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:46,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:46,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:46,912 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 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 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-08-25 16:15:46,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:46,944 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2021-08-25 16:15:46,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) Word has length 17 [2021-08-25 16:15:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:46,953 INFO L225 Difference]: With dead ends: 58 [2021-08-25 16:15:46,953 INFO L226 Difference]: Without dead ends: 28 [2021-08-25 16:15:46,956 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-25 16:15:46,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-25 16:15:46,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-08-25 16:15:46,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4230769230769231) internal successors, (37), 26 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) [2021-08-25 16:15:46,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2021-08-25 16:15:46,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 17 [2021-08-25 16:15:46,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:46,982 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2021-08-25 16:15:46,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 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) [2021-08-25 16:15:46,983 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2021-08-25 16:15:46,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-25 16:15:46,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:46,984 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:46,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-25 16:15:46,984 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:46,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:46,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1403287377, now seen corresponding path program 1 times [2021-08-25 16:15:46,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:46,987 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59653295] [2021-08-25 16:15:46,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:46,988 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:47,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-25 16:15:47,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:47,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59653295] [2021-08-25 16:15:47,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59653295] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:47,073 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133777713] [2021-08-25 16:15:47,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:47,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:47,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:47,075 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) [2021-08-25 16:15:47,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-25 16:15:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:47,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:15:47,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-25 16:15:47,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133777713] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:47,267 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:47,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:15:47,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810912150] [2021-08-25 16:15:47,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:47,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:47,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:47,269 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 16:15:47,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:47,316 INFO L93 Difference]: Finished difference Result 57 states and 82 transitions. [2021-08-25 16:15:47,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:47,317 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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 19 [2021-08-25 16:15:47,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:47,318 INFO L225 Difference]: With dead ends: 57 [2021-08-25 16:15:47,318 INFO L226 Difference]: Without dead ends: 36 [2021-08-25 16:15:47,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:47,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-25 16:15:47,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2021-08-25 16:15:47,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 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) [2021-08-25 16:15:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2021-08-25 16:15:47,322 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 19 [2021-08-25 16:15:47,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:47,322 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2021-08-25 16:15:47,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 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) [2021-08-25 16:15:47,323 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2021-08-25 16:15:47,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-25 16:15:47,323 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:47,323 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:47,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:47,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:47,550 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:47,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:47,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1132417868, now seen corresponding path program 1 times [2021-08-25 16:15:47,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:47,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256117477] [2021-08-25 16:15:47,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:47,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:47,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:47,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-25 16:15:47,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:47,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256117477] [2021-08-25 16:15:47,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256117477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:47,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424629250] [2021-08-25 16:15:47,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:47,628 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:47,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:47,633 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) [2021-08-25 16:15:47,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-25 16:15:47,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:47,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-08-25 16:15:47,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:15:47,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424629250] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:47,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:47,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:15:47,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208697525] [2021-08-25 16:15:47,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:47,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:47,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:47,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:47,901 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 16:15:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:47,923 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-08-25 16:15:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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 28 [2021-08-25 16:15:47,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:47,935 INFO L225 Difference]: With dead ends: 46 [2021-08-25 16:15:47,935 INFO L226 Difference]: Without dead ends: 35 [2021-08-25 16:15:47,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.6ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:47,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-25 16:15:47,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2021-08-25 16:15:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2021-08-25 16:15:47,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2021-08-25 16:15:47,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 28 [2021-08-25 16:15:47,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:47,944 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2021-08-25 16:15:47,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 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) [2021-08-25 16:15:47,944 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2021-08-25 16:15:47,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:15:47,947 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:47,947 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:47,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:48,165 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,SelfDestructingSolverStorable2 [2021-08-25 16:15:48,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:48,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:48,166 INFO L82 PathProgramCache]: Analyzing trace with hash 513768630, now seen corresponding path program 1 times [2021-08-25 16:15:48,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:48,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757247693] [2021-08-25 16:15:48,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:48,166 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:48,211 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:15:48,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:48,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757247693] [2021-08-25 16:15:48,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757247693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:48,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364680566] [2021-08-25 16:15:48,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:48,212 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:48,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:48,213 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) [2021-08-25 16:15:48,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-25 16:15:48,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:48,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:15:48,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:48,424 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-08-25 16:15:48,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364680566] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:48,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:48,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-08-25 16:15:48,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422933817] [2021-08-25 16:15:48,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-25 16:15:48,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:48,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-25 16:15:48,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:48,426 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 16:15:48,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:48,459 INFO L93 Difference]: Finished difference Result 78 states and 103 transitions. [2021-08-25 16:15:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-25 16:15:48,460 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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 30 [2021-08-25 16:15:48,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:48,461 INFO L225 Difference]: With dead ends: 78 [2021-08-25 16:15:48,461 INFO L226 Difference]: Without dead ends: 56 [2021-08-25 16:15:48,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:48,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-25 16:15:48,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 46. [2021-08-25 16:15:48,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3777777777777778) internal successors, (62), 45 states have internal predecessors, (62), 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) [2021-08-25 16:15:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 62 transitions. [2021-08-25 16:15:48,465 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 62 transitions. Word has length 30 [2021-08-25 16:15:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:48,465 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 62 transitions. [2021-08-25 16:15:48,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2021-08-25 16:15:48,466 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 62 transitions. [2021-08-25 16:15:48,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-25 16:15:48,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:48,467 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:48,491 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:48,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:48,671 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:48,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:48,671 INFO L82 PathProgramCache]: Analyzing trace with hash -303820238, now seen corresponding path program 1 times [2021-08-25 16:15:48,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:48,671 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022704253] [2021-08-25 16:15:48,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:48,671 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:48,701 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:15:48,701 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:48,701 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022704253] [2021-08-25 16:15:48,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022704253] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:48,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933826696] [2021-08-25 16:15:48,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:48,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:48,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:48,703 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:48,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-25 16:15:48,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:15:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:48,890 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-08-25 16:15:48,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933826696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:48,890 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:15:48,890 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-08-25 16:15:48,890 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971264592] [2021-08-25 16:15:48,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:15:48,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:48,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:15:48,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:48,891 INFO L87 Difference]: Start difference. First operand 46 states and 62 transitions. Second operand has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-08-25 16:15:48,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:48,924 INFO L93 Difference]: Finished difference Result 90 states and 122 transitions. [2021-08-25 16:15:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:48,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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 30 [2021-08-25 16:15:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:48,929 INFO L225 Difference]: With dead ends: 90 [2021-08-25 16:15:48,929 INFO L226 Difference]: Without dead ends: 49 [2021-08-25 16:15:48,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:48,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-25 16:15:48,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-08-25 16:15:48,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 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) [2021-08-25 16:15:48,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-08-25 16:15:48,932 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 30 [2021-08-25 16:15:48,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:48,932 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-08-25 16:15:48,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.6) internal successors, (33), 5 states have internal predecessors, (33), 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) [2021-08-25 16:15:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-08-25 16:15:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-25 16:15:48,933 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:48,933 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:48,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:49,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:49,135 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:49,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 612513716, now seen corresponding path program 2 times [2021-08-25 16:15:49,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:49,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481473380] [2021-08-25 16:15:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:49,136 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-08-25 16:15:49,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:49,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481473380] [2021-08-25 16:15:49,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481473380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:49,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060085560] [2021-08-25 16:15:49,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:49,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:49,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:49,189 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:49,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-25 16:15:49,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-08-25 16:15:49,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:49,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 13 conjunts are in the unsatisfiable core [2021-08-25 16:15:49,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:15:49,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060085560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:49,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:49,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2021-08-25 16:15:49,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422163172] [2021-08-25 16:15:49,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-25 16:15:49,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:49,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-25 16:15:49,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-25 16:15:49,527 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-08-25 16:15:49,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:49,577 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2021-08-25 16:15:49,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-25 16:15:49,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 32 [2021-08-25 16:15:49,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:49,578 INFO L225 Difference]: With dead ends: 114 [2021-08-25 16:15:49,578 INFO L226 Difference]: Without dead ends: 109 [2021-08-25 16:15:49,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-08-25 16:15:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-25 16:15:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2021-08-25 16:15:49,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 72 states have internal predecessors, (98), 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) [2021-08-25 16:15:49,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 98 transitions. [2021-08-25 16:15:49,588 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 98 transitions. Word has length 32 [2021-08-25 16:15:49,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:49,588 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 98 transitions. [2021-08-25 16:15:49,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2021-08-25 16:15:49,588 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 98 transitions. [2021-08-25 16:15:49,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-25 16:15:49,589 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:49,589 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:49,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:49,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:49,793 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:49,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:49,793 INFO L82 PathProgramCache]: Analyzing trace with hash -582685651, now seen corresponding path program 1 times [2021-08-25 16:15:49,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:49,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807439757] [2021-08-25 16:15:49,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:49,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:49,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-08-25 16:15:49,825 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:49,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807439757] [2021-08-25 16:15:49,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807439757] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:49,826 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470417569] [2021-08-25 16:15:49,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:49,826 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:49,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:49,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:49,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-25 16:15:49,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:49,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:15:49,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:50,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-08-25 16:15:50,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470417569] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:50,029 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-25 16:15:50,029 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-08-25 16:15:50,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819803655] [2021-08-25 16:15:50,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:15:50,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:50,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:15:50,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:50,032 INFO L87 Difference]: Start difference. First operand 73 states and 98 transitions. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-08-25 16:15:50,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:50,092 INFO L93 Difference]: Finished difference Result 162 states and 221 transitions. [2021-08-25 16:15:50,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:15:50,092 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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 35 [2021-08-25 16:15:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:50,094 INFO L225 Difference]: With dead ends: 162 [2021-08-25 16:15:50,094 INFO L226 Difference]: Without dead ends: 96 [2021-08-25 16:15:50,094 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 15.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-08-25 16:15:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2021-08-25 16:15:50,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 89 states have internal predecessors, (115), 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) [2021-08-25 16:15:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 115 transitions. [2021-08-25 16:15:50,100 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 115 transitions. Word has length 35 [2021-08-25 16:15:50,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:50,100 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 115 transitions. [2021-08-25 16:15:50,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 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) [2021-08-25 16:15:50,100 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 115 transitions. [2021-08-25 16:15:50,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-25 16:15:50,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:50,101 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:50,121 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:50,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:50,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:50,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:50,309 INFO L82 PathProgramCache]: Analyzing trace with hash 2109979210, now seen corresponding path program 2 times [2021-08-25 16:15:50,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:50,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107834010] [2021-08-25 16:15:50,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:50,310 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:50,321 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:50,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572251170] [2021-08-25 16:15:50,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:50,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:50,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:50,333 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:50,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-25 16:15:50,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:50,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:50,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:15:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-08-25 16:15:50,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:50,596 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107834010] [2021-08-25 16:15:50,596 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:50,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572251170] [2021-08-25 16:15:50,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572251170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:50,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:50,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:15:50,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957753392] [2021-08-25 16:15:50,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:15:50,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:50,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:15:50,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:15:50,598 INFO L87 Difference]: Start difference. First operand 90 states and 115 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-08-25 16:15:50,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:50,616 INFO L93 Difference]: Finished difference Result 174 states and 224 transitions. [2021-08-25 16:15:50,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:15:50,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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 46 [2021-08-25 16:15:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:50,617 INFO L225 Difference]: With dead ends: 174 [2021-08-25 16:15:50,617 INFO L226 Difference]: Without dead ends: 93 [2021-08-25 16:15:50,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:15:50,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-08-25 16:15:50,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-08-25 16:15:50,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 91 states have internal predecessors, (117), 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) [2021-08-25 16:15:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2021-08-25 16:15:50,629 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 46 [2021-08-25 16:15:50,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:50,629 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2021-08-25 16:15:50,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 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) [2021-08-25 16:15:50,629 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2021-08-25 16:15:50,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-25 16:15:50,630 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:50,630 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:50,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:50,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:50,850 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:50,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:50,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1002085324, now seen corresponding path program 3 times [2021-08-25 16:15:50,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:50,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616736881] [2021-08-25 16:15:50,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:50,851 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:50,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:50,884 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-08-25 16:15:50,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:50,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616736881] [2021-08-25 16:15:50,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616736881] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:50,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:50,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:15:50,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627997052] [2021-08-25 16:15:50,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:50,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:50,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:50,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:50,886 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-08-25 16:15:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:50,927 INFO L93 Difference]: Finished difference Result 177 states and 232 transitions. [2021-08-25 16:15:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 48 [2021-08-25 16:15:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:50,928 INFO L225 Difference]: With dead ends: 177 [2021-08-25 16:15:50,928 INFO L226 Difference]: Without dead ends: 108 [2021-08-25 16:15:50,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-08-25 16:15:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 83. [2021-08-25 16:15:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2073170731707317) internal successors, (99), 82 states have internal predecessors, (99), 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) [2021-08-25 16:15:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-08-25 16:15:50,936 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 48 [2021-08-25 16:15:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:50,936 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-08-25 16:15:50,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-08-25 16:15:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-08-25 16:15:50,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-25 16:15:50,937 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:50,937 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:50,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-25 16:15:50,937 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:50,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:50,938 INFO L82 PathProgramCache]: Analyzing trace with hash 238121238, now seen corresponding path program 1 times [2021-08-25 16:15:50,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:50,938 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149431797] [2021-08-25 16:15:50,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:50,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:50,949 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:50,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1034994168] [2021-08-25 16:15:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:50,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:50,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:50,957 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:50,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-25 16:15:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:51,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:15:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-08-25 16:15:51,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:51,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149431797] [2021-08-25 16:15:51,261 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:51,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034994168] [2021-08-25 16:15:51,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034994168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:51,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:51,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:15:51,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783273029] [2021-08-25 16:15:51,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:15:51,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:51,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:15:51,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:51,262 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2021-08-25 16:15:51,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:51,284 INFO L93 Difference]: Finished difference Result 157 states and 189 transitions. [2021-08-25 16:15:51,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:15:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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 54 [2021-08-25 16:15:51,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:51,287 INFO L225 Difference]: With dead ends: 157 [2021-08-25 16:15:51,287 INFO L226 Difference]: Without dead ends: 85 [2021-08-25 16:15:51,287 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:51,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-25 16:15:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-08-25 16:15:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2023809523809523) internal successors, (101), 84 states have internal predecessors, (101), 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) [2021-08-25 16:15:51,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 101 transitions. [2021-08-25 16:15:51,290 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 101 transitions. Word has length 54 [2021-08-25 16:15:51,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:51,290 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 101 transitions. [2021-08-25 16:15:51,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.571428571428571) internal successors, (39), 7 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) [2021-08-25 16:15:51,290 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 101 transitions. [2021-08-25 16:15:51,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-25 16:15:51,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:51,291 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:51,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:51,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-08-25 16:15:51,497 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:51,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:51,497 INFO L82 PathProgramCache]: Analyzing trace with hash -428363624, now seen corresponding path program 2 times [2021-08-25 16:15:51,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:51,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300899798] [2021-08-25 16:15:51,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:51,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:51,514 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:51,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335247834] [2021-08-25 16:15:51,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:51,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:51,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:51,529 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:51,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-25 16:15:51,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:51,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:51,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:15:51,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-08-25 16:15:51,889 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:51,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300899798] [2021-08-25 16:15:51,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:51,889 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335247834] [2021-08-25 16:15:51,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335247834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:51,889 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:51,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:15:51,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893417153] [2021-08-25 16:15:51,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:15:51,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:51,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:15:51,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:51,890 INFO L87 Difference]: Start difference. First operand 85 states and 101 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2021-08-25 16:15:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:51,959 INFO L93 Difference]: Finished difference Result 166 states and 202 transitions. [2021-08-25 16:15:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:15:51,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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 56 [2021-08-25 16:15:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:51,962 INFO L225 Difference]: With dead ends: 166 [2021-08-25 16:15:51,962 INFO L226 Difference]: Without dead ends: 100 [2021-08-25 16:15:51,962 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.7ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-08-25 16:15:51,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-08-25 16:15:51,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.1717171717171717) internal successors, (116), 99 states have internal predecessors, (116), 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) [2021-08-25 16:15:51,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 116 transitions. [2021-08-25 16:15:51,969 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 116 transitions. Word has length 56 [2021-08-25 16:15:51,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:51,970 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 116 transitions. [2021-08-25 16:15:51,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 states have internal predecessors, (38), 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) [2021-08-25 16:15:51,970 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 116 transitions. [2021-08-25 16:15:51,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-25 16:15:51,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:51,975 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:52,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:52,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:52,197 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:52,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:52,198 INFO L82 PathProgramCache]: Analyzing trace with hash 35998627, now seen corresponding path program 3 times [2021-08-25 16:15:52,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:52,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698870376] [2021-08-25 16:15:52,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:52,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:52,206 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:52,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485580140] [2021-08-25 16:15:52,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:15:52,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:52,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:52,212 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:52,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-25 16:15:52,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-25 16:15:52,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:15:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-08-25 16:15:52,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:52,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698870376] [2021-08-25 16:15:52,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:52,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485580140] [2021-08-25 16:15:52,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485580140] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-25 16:15:52,512 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-25 16:15:52,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-25 16:15:52,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402068792] [2021-08-25 16:15:52,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:52,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:52,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:52,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:52,513 INFO L87 Difference]: Start difference. First operand 100 states and 116 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-08-25 16:15:52,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:52,532 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2021-08-25 16:15:52,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:52,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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 65 [2021-08-25 16:15:52,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:52,533 INFO L225 Difference]: With dead ends: 132 [2021-08-25 16:15:52,533 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 16:15:52,533 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:52,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 16:15:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-08-25 16:15:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.123076923076923) internal successors, (73), 65 states have internal predecessors, (73), 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) [2021-08-25 16:15:52,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 73 transitions. [2021-08-25 16:15:52,535 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 73 transitions. Word has length 65 [2021-08-25 16:15:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:52,536 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 73 transitions. [2021-08-25 16:15:52,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 4 states have internal predecessors, (34), 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) [2021-08-25 16:15:52,536 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 73 transitions. [2021-08-25 16:15:52,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-08-25 16:15:52,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:52,536 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:52,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:52,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-25 16:15:52,753 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:52,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:52,753 INFO L82 PathProgramCache]: Analyzing trace with hash 1841436961, now seen corresponding path program 1 times [2021-08-25 16:15:52,753 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:52,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607510229] [2021-08-25 16:15:52,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:52,753 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:52,761 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:52,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518539241] [2021-08-25 16:15:52,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:52,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:52,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:52,762 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:52,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-25 16:15:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-25 16:15:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-25 16:15:52,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-08-25 16:15:53,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607510229] [2021-08-25 16:15:53,167 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518539241] [2021-08-25 16:15:53,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518539241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:53,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:53,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-08-25 16:15:53,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219446737] [2021-08-25 16:15:53,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-25 16:15:53,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:53,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-25 16:15:53,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:53,168 INFO L87 Difference]: Start difference. First operand 66 states and 73 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-08-25 16:15:53,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:53,250 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2021-08-25 16:15:53,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-25 16:15:53,251 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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 65 [2021-08-25 16:15:53,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:53,251 INFO L225 Difference]: With dead ends: 114 [2021-08-25 16:15:53,251 INFO L226 Difference]: Without dead ends: 75 [2021-08-25 16:15:53,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-08-25 16:15:53,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-08-25 16:15:53,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-08-25 16:15:53,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.1486486486486487) internal successors, (85), 74 states have internal predecessors, (85), 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) [2021-08-25 16:15:53,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2021-08-25 16:15:53,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 65 [2021-08-25 16:15:53,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:53,253 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2021-08-25 16:15:53,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 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) [2021-08-25 16:15:53,253 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2021-08-25 16:15:53,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-08-25 16:15:53,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:53,254 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:53,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-08-25 16:15:53,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-25 16:15:53,469 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:53,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:53,469 INFO L82 PathProgramCache]: Analyzing trace with hash -484525568, now seen corresponding path program 2 times [2021-08-25 16:15:53,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:53,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652520194] [2021-08-25 16:15:53,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:53,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:53,477 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:53,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995645139] [2021-08-25 16:15:53,477 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-25 16:15:53,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:53,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:53,478 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:53,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-25 16:15:53,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-25 16:15:53,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:53,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2021-08-25 16:15:53,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:53,880 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-25 16:15:53,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:53,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652520194] [2021-08-25 16:15:53,881 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:53,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995645139] [2021-08-25 16:15:53,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995645139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:53,881 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:53,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-08-25 16:15:53,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128892186] [2021-08-25 16:15:53,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-25 16:15:53,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:53,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-25 16:15:53,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:53,882 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-08-25 16:15:53,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:53,893 INFO L93 Difference]: Finished difference Result 100 states and 113 transitions. [2021-08-25 16:15:53,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-25 16:15:53,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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 74 [2021-08-25 16:15:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:53,898 INFO L225 Difference]: With dead ends: 100 [2021-08-25 16:15:53,898 INFO L226 Difference]: Without dead ends: 78 [2021-08-25 16:15:53,898 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-25 16:15:53,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-08-25 16:15:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-08-25 16:15:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.144736842105263) internal successors, (87), 76 states have internal predecessors, (87), 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) [2021-08-25 16:15:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2021-08-25 16:15:53,901 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 74 [2021-08-25 16:15:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:53,902 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2021-08-25 16:15:53,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 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) [2021-08-25 16:15:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2021-08-25 16:15:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-25 16:15:53,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:53,903 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:53,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:54,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-25 16:15:54,110 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:54,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:54,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1416102914, now seen corresponding path program 3 times [2021-08-25 16:15:54,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:54,111 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080093283] [2021-08-25 16:15:54,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:54,111 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:54,118 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:54,119 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296196082] [2021-08-25 16:15:54,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-25 16:15:54,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:54,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:54,120 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:54,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-25 16:15:54,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-25 16:15:54,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:54,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-25 16:15:54,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:54,639 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-25 16:15:54,640 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080093283] [2021-08-25 16:15:54,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:54,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296196082] [2021-08-25 16:15:54,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296196082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:54,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:54,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-08-25 16:15:54,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866717788] [2021-08-25 16:15:54,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-25 16:15:54,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:54,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-25 16:15:54,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:54,641 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-08-25 16:15:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:54,662 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2021-08-25 16:15:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-25 16:15:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 76 [2021-08-25 16:15:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:54,662 INFO L225 Difference]: With dead ends: 102 [2021-08-25 16:15:54,662 INFO L226 Difference]: Without dead ends: 80 [2021-08-25 16:15:54,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-08-25 16:15:54,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-25 16:15:54,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-08-25 16:15:54,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.141025641025641) internal successors, (89), 78 states have internal predecessors, (89), 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) [2021-08-25 16:15:54,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-08-25 16:15:54,665 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 76 [2021-08-25 16:15:54,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:54,665 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-08-25 16:15:54,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-08-25 16:15:54,665 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-08-25 16:15:54,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-08-25 16:15:54,665 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:54,665 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:54,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:54,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-25 16:15:54,871 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1735993980, now seen corresponding path program 4 times [2021-08-25 16:15:54,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:54,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807073728] [2021-08-25 16:15:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:54,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:54,879 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:54,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653771394] [2021-08-25 16:15:54,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-25 16:15:54,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:54,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:54,881 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:54,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-25 16:15:55,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-25 16:15:55,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-25 16:15:55,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-25 16:15:55,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-25 16:15:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-08-25 16:15:55,296 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-25 16:15:55,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807073728] [2021-08-25 16:15:55,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-08-25 16:15:55,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653771394] [2021-08-25 16:15:55,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653771394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-25 16:15:55,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-08-25 16:15:55,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-08-25 16:15:55,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435987165] [2021-08-25 16:15:55,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-25 16:15:55,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-25 16:15:55,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-25 16:15:55,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:15:55,297 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-08-25 16:15:55,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-25 16:15:55,333 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2021-08-25 16:15:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-25 16:15:55,334 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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 78 [2021-08-25 16:15:55,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-25 16:15:55,334 INFO L225 Difference]: With dead ends: 103 [2021-08-25 16:15:55,334 INFO L226 Difference]: Without dead ends: 81 [2021-08-25 16:15:55,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-08-25 16:15:55,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-08-25 16:15:55,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-08-25 16:15:55,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.1375) internal successors, (91), 80 states have internal predecessors, (91), 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) [2021-08-25 16:15:55,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2021-08-25 16:15:55,336 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 78 [2021-08-25 16:15:55,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-25 16:15:55,336 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2021-08-25 16:15:55,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 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) [2021-08-25 16:15:55,336 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2021-08-25 16:15:55,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-08-25 16:15:55,337 INFO L504 BasicCegarLoop]: Found error trace [2021-08-25 16:15:55,337 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-25 16:15:55,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:55,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:55,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-08-25 16:15:55,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-25 16:15:55,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1345801862, now seen corresponding path program 5 times [2021-08-25 16:15:55,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-25 16:15:55,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975013854] [2021-08-25 16:15:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-25 16:15:55,559 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-25 16:15:55,567 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-25 16:15:55,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717685011] [2021-08-25 16:15:55,567 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-25 16:15:55,567 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-25 16:15:55,567 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-25 16:15:55,588 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-25 16:15:55,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-25 16:15:55,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-25 16:15:55,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-08-25 16:15:55,973 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-25 16:15:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-25 16:15:56,155 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-25 16:15:56,156 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-08-25 16:15:56,156 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-08-25 16:15:56,180 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-25 16:15:56,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-25 16:15:56,375 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-25 16:15:56,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.08 04:15:56 BoogieIcfgContainer [2021-08-25 16:15:56,485 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-25 16:15:56,485 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-25 16:15:56,485 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-25 16:15:56,485 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-25 16:15:56,486 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.08 04:15:46" (3/4) ... [2021-08-25 16:15:56,487 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-25 16:15:56,524 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-25 16:15:56,524 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-25 16:15:56,525 INFO L168 Benchmark]: Toolchain (without parser) took 10426.44 ms. Allocated memory was 67.1 MB in the beginning and 119.5 MB in the end (delta: 52.4 MB). Free memory was 49.7 MB in the beginning and 49.2 MB in the end (delta: 504.0 kB). Peak memory consumption was 53.2 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,525 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:15:56,527 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.94 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 51.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,528 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.67 ms. Allocated memory is still 67.1 MB. Free memory was 51.4 MB in the beginning and 49.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,528 INFO L168 Benchmark]: Boogie Preprocessor took 24.26 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-08-25 16:15:56,528 INFO L168 Benchmark]: RCFGBuilder took 367.80 ms. Allocated memory is still 67.1 MB. Free memory was 48.0 MB in the beginning and 29.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,528 INFO L168 Benchmark]: TraceAbstraction took 9774.17 ms. Allocated memory was 67.1 MB in the beginning and 119.5 MB in the end (delta: 52.4 MB). Free memory was 50.1 MB in the beginning and 55.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,529 INFO L168 Benchmark]: Witness Printer took 39.17 ms. Allocated memory is still 119.5 MB. Free memory was 55.5 MB in the beginning and 49.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-08-25 16:15:56,529 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 67.1 MB. Free memory is still 49.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 176.94 ms. Allocated memory is still 67.1 MB. Free memory was 49.5 MB in the beginning and 51.7 MB in the end (delta: -2.2 MB). Peak memory consumption was 13.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.67 ms. Allocated memory is still 67.1 MB. Free memory was 51.4 MB in the beginning and 49.3 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.26 ms. Allocated memory is still 67.1 MB. Free memory was 49.3 MB in the beginning and 48.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 367.80 ms. Allocated memory is still 67.1 MB. Free memory was 48.0 MB in the beginning and 29.0 MB in the end (delta: 19.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9774.17 ms. Allocated memory was 67.1 MB in the beginning and 119.5 MB in the end (delta: 52.4 MB). Free memory was 50.1 MB in the beginning and 55.5 MB in the end (delta: -5.4 MB). Peak memory consumption was 46.4 MB. Max. memory is 16.1 GB. * Witness Printer took 39.17 ms. Allocated memory is still 119.5 MB. Free memory was 55.5 MB in the beginning and 49.2 MB in the end (delta: 6.3 MB). Peak memory consumption was 6.3 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 - CounterExampleResult [Line: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[5]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 5 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 5) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<5 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<5 -1) [L57] x[5 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND FALSE !(i > 5/2) [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 5 [L29] COND TRUE i > 5/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 5) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 9626.9ms, OverallIterations: 17, TraceHistogramMax: 5, EmptinessCheckTime: 21.1ms, AutomataDifference: 675.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 490 SDtfs, 244 SDslu, 688 SDs, 0 SdLazy, 364 SolverSat, 115 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 346.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 706 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 238.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=11, InterpolantAutomatonStates: 79, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 85.8ms AutomataMinimizationTime, 16 MinimizatonAttempts, 95 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 213.0ms SsaConstructionTime, 755.8ms SatisfiabilityAnalysisTime, 2413.7ms InterpolantComputationTime, 1007 NumberOfCodeBlocks, 924 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 905 ConstructedInterpolants, 0 QuantifiedInterpolants, 1203 SizeOfPredicates, 5 NumberOfNonLiveVariables, 2454 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 22 InterpolantComputations, 7 PerfectInterpolantSequences, 765/844 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! [2021-08-25 16:15:56,556 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...