./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 9a8b2e8d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/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 0.1.25-9a8b2e8 [2020-10-19 21:49:24,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-19 21:49:24,196 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-19 21:49:24,219 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-19 21:49:24,220 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-19 21:49:24,221 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-19 21:49:24,222 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-19 21:49:24,224 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-19 21:49:24,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-19 21:49:24,229 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-19 21:49:24,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-19 21:49:24,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-19 21:49:24,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-19 21:49:24,235 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-19 21:49:24,239 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-19 21:49:24,240 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-19 21:49:24,241 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-19 21:49:24,242 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-19 21:49:24,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-19 21:49:24,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-19 21:49:24,246 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-19 21:49:24,254 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-19 21:49:24,255 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-19 21:49:24,256 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-19 21:49:24,258 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-19 21:49:24,259 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-19 21:49:24,259 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-19 21:49:24,260 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-19 21:49:24,260 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-19 21:49:24,261 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-19 21:49:24,261 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-19 21:49:24,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-19 21:49:24,263 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-19 21:49:24,264 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-19 21:49:24,265 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-19 21:49:24,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-19 21:49:24,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-19 21:49:24,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-19 21:49:24,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-19 21:49:24,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-19 21:49:24,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-19 21:49:24,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-19 21:49:24,290 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-19 21:49:24,290 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-19 21:49:24,291 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-19 21:49:24,292 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-19 21:49:24,292 INFO L138 SettingsManager]: * Use SBE=true [2020-10-19 21:49:24,292 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-19 21:49:24,292 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-19 21:49:24,293 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-19 21:49:24,293 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-19 21:49:24,293 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-19 21:49:24,293 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-19 21:49:24,294 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-19 21:49:24,294 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-19 21:49:24,294 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-19 21:49:24,294 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-19 21:49:24,295 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-19 21:49:24,295 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-19 21:49:24,295 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-19 21:49:24,295 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-19 21:49:24,296 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-19 21:49:24,296 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-19 21:49:24,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:49:24,296 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-19 21:49:24,297 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-19 21:49:24,297 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-19 21:49:24,297 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-19 21:49:24,297 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-19 21:49:24,298 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-19 21:49:24,298 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-19 21:49:24,298 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! 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 [2020-10-19 21:49:24,487 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-19 21:49:24,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-19 21:49:24,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-19 21:49:24,504 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-19 21:49:24,504 INFO L275 PluginConnector]: CDTParser initialized [2020-10-19 21:49:24,505 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-10-19 21:49:24,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47115175e/7dfee72713a14676bb75be8983fb8fb9/FLAGac7a62ba3 [2020-10-19 21:49:24,979 INFO L306 CDTParser]: Found 1 translation units. [2020-10-19 21:49:24,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/rangesum05.i [2020-10-19 21:49:24,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47115175e/7dfee72713a14676bb75be8983fb8fb9/FLAGac7a62ba3 [2020-10-19 21:49:25,382 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47115175e/7dfee72713a14676bb75be8983fb8fb9 [2020-10-19 21:49:25,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-19 21:49:25,393 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-10-19 21:49:25,394 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-19 21:49:25,395 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-19 21:49:25,399 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-19 21:49:25,400 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17bb53d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25, skipping insertion in model container [2020-10-19 21:49:25,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-19 21:49:25,437 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-19 21:49:25,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:49:25,745 INFO L203 MainTranslator]: Completed pre-run [2020-10-19 21:49:25,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-19 21:49:25,812 INFO L208 MainTranslator]: Completed translation [2020-10-19 21:49:25,813 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25 WrapperNode [2020-10-19 21:49:25,813 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-19 21:49:25,814 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-19 21:49:25,814 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-19 21:49:25,814 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-19 21:49:25,822 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,832 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,862 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-19 21:49:25,862 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-19 21:49:25,862 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-19 21:49:25,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-19 21:49:25,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,886 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... [2020-10-19 21:49:25,900 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-19 21:49:25,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-19 21:49:25,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-19 21:49:25,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-19 21:49:25,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-19 21:49:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-19 21:49:25,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-19 21:49:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-19 21:49:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-19 21:49:25,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-19 21:49:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-19 21:49:25,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-19 21:49:26,311 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-19 21:49:26,312 INFO L298 CfgBuilder]: Removed 19 assume(true) statements. [2020-10-19 21:49:26,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:26 BoogieIcfgContainer [2020-10-19 21:49:26,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-19 21:49:26,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-19 21:49:26,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-19 21:49:26,331 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-19 21:49:26,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.10 09:49:25" (1/3) ... [2020-10-19 21:49:26,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7133cd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:49:26, skipping insertion in model container [2020-10-19 21:49:26,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.10 09:49:25" (2/3) ... [2020-10-19 21:49:26,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7133cd0c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.10 09:49:26, skipping insertion in model container [2020-10-19 21:49:26,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:26" (3/3) ... [2020-10-19 21:49:26,334 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum05.i [2020-10-19 21:49:26,348 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-19 21:49:26,355 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-19 21:49:26,371 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-19 21:49:26,395 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-19 21:49:26,396 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-19 21:49:26,396 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-19 21:49:26,396 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-19 21:49:26,397 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-19 21:49:26,397 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-19 21:49:26,397 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-19 21:49:26,397 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-19 21:49:26,415 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-10-19 21:49:26,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 21:49:26,422 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:26,423 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:26,423 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1570593938, now seen corresponding path program 1 times [2020-10-19 21:49:26,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:26,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992436469] [2020-10-19 21:49:26,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:26,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:26,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992436469] [2020-10-19 21:49:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-19 21:49:26,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639577134] [2020-10-19 21:49:26,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-19 21:49:26,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:26,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-19 21:49:26,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:49:26,625 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2020-10-19 21:49:26,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:26,656 INFO L93 Difference]: Finished difference Result 58 states and 90 transitions. [2020-10-19 21:49:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-19 21:49:26,657 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 18 [2020-10-19 21:49:26,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:26,667 INFO L225 Difference]: With dead ends: 58 [2020-10-19 21:49:26,668 INFO L226 Difference]: Without dead ends: 27 [2020-10-19 21:49:26,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-19 21:49:26,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-19 21:49:26,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-19 21:49:26,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-19 21:49:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2020-10-19 21:49:26,702 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 18 [2020-10-19 21:49:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:26,703 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2020-10-19 21:49:26,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-19 21:49:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2020-10-19 21:49:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-19 21:49:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:26,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:26,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-19 21:49:26,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 813479325, now seen corresponding path program 1 times [2020-10-19 21:49:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:26,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769568747] [2020-10-19 21:49:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:26,725 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:26,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236477322] [2020-10-19 21:49:26,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:26,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:26,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:26,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:26,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769568747] [2020-10-19 21:49:26,898 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:26,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236477322] [2020-10-19 21:49:26,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:26,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-19 21:49:26,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328658873] [2020-10-19 21:49:26,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:26,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:26,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:26,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:49:26,903 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand 3 states. [2020-10-19 21:49:26,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:26,938 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2020-10-19 21:49:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:26,939 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-10-19 21:49:26,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:26,940 INFO L225 Difference]: With dead ends: 52 [2020-10-19 21:49:26,942 INFO L226 Difference]: Without dead ends: 29 [2020-10-19 21:49:26,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-19 21:49:26,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-19 21:49:26,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-10-19 21:49:26,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-19 21:49:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2020-10-19 21:49:26,956 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 18 [2020-10-19 21:49:26,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:26,957 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2020-10-19 21:49:26,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2020-10-19 21:49:26,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-19 21:49:26,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:26,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-19 21:49:27,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-19 21:49:27,175 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:27,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:27,176 INFO L82 PathProgramCache]: Analyzing trace with hash -552235489, now seen corresponding path program 1 times [2020-10-19 21:49:27,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:27,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120345224] [2020-10-19 21:49:27,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:27,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:27,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-19 21:49:27,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120345224] [2020-10-19 21:49:27,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664012577] [2020-10-19 21:49:27,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:27,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:27,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:27,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:27,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-19 21:49:27,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:27,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:27,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233516064] [2020-10-19 21:49:27,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:27,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:27,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:27,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:27,375 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand 3 states. [2020-10-19 21:49:27,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:27,445 INFO L93 Difference]: Finished difference Result 59 states and 84 transitions. [2020-10-19 21:49:27,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:27,446 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-19 21:49:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:27,447 INFO L225 Difference]: With dead ends: 59 [2020-10-19 21:49:27,447 INFO L226 Difference]: Without dead ends: 37 [2020-10-19 21:49:27,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-19 21:49:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-10-19 21:49:27,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-19 21:49:27,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2020-10-19 21:49:27,454 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2020-10-19 21:49:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:27,455 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2020-10-19 21:49:27,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:27,455 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2020-10-19 21:49:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-19 21:49:27,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:27,457 INFO L422 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] [2020-10-19 21:49:27,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:27,670 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:27,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:27,670 INFO L82 PathProgramCache]: Analyzing trace with hash -745215302, now seen corresponding path program 1 times [2020-10-19 21:49:27,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:27,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434906214] [2020-10-19 21:49:27,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:27,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-19 21:49:27,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434906214] [2020-10-19 21:49:27,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321553594] [2020-10-19 21:49:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:27,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-19 21:49:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:27,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:27,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:27,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187273557] [2020-10-19 21:49:27,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:27,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:27,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:27,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:27,840 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 3 states. [2020-10-19 21:49:27,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:27,859 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-10-19 21:49:27,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:27,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-19 21:49:27,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:27,861 INFO L225 Difference]: With dead ends: 48 [2020-10-19 21:49:27,861 INFO L226 Difference]: Without dead ends: 36 [2020-10-19 21:49:27,863 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:27,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-19 21:49:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-10-19 21:49:27,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-19 21:49:27,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-19 21:49:27,875 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 29 [2020-10-19 21:49:27,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:27,875 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-19 21:49:27,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-19 21:49:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 21:49:27,879 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:27,879 INFO L422 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, 1] [2020-10-19 21:49:28,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:28,093 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:28,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:28,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1253041416, now seen corresponding path program 1 times [2020-10-19 21:49:28,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:28,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400288275] [2020-10-19 21:49:28,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:28,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:28,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400288275] [2020-10-19 21:49:28,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48910215] [2020-10-19 21:49:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:28,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:28,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:28,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:28,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-19 21:49:28,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:28,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-19 21:49:28,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843945529] [2020-10-19 21:49:28,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-19 21:49:28,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:28,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-19 21:49:28,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:28,245 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 3 states. [2020-10-19 21:49:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:28,569 INFO L93 Difference]: Finished difference Result 81 states and 106 transitions. [2020-10-19 21:49:28,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-19 21:49:28,570 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-10-19 21:49:28,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:28,571 INFO L225 Difference]: With dead ends: 81 [2020-10-19 21:49:28,571 INFO L226 Difference]: Without dead ends: 58 [2020-10-19 21:49:28,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:28,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-19 21:49:28,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 47. [2020-10-19 21:49:28,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-19 21:49:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 63 transitions. [2020-10-19 21:49:28,579 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 63 transitions. Word has length 31 [2020-10-19 21:49:28,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:28,579 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 63 transitions. [2020-10-19 21:49:28,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-19 21:49:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 63 transitions. [2020-10-19 21:49:28,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-19 21:49:28,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:28,581 INFO L422 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, 1] [2020-10-19 21:49:28,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:28,795 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:28,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:28,795 INFO L82 PathProgramCache]: Analyzing trace with hash -828492548, now seen corresponding path program 1 times [2020-10-19 21:49:28,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:28,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759557227] [2020-10-19 21:49:28,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:28,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759557227] [2020-10-19 21:49:28,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545276056] [2020-10-19 21:49:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:28,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:28,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:28,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:28,952 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-19 21:49:28,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:49:28,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-10-19 21:49:28,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521279417] [2020-10-19 21:49:28,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:28,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:28,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:28,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:28,955 INFO L87 Difference]: Start difference. First operand 47 states and 63 transitions. Second operand 5 states. [2020-10-19 21:49:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:28,981 INFO L93 Difference]: Finished difference Result 92 states and 124 transitions. [2020-10-19 21:49:28,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:28,982 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-19 21:49:28,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:28,983 INFO L225 Difference]: With dead ends: 92 [2020-10-19 21:49:28,983 INFO L226 Difference]: Without dead ends: 50 [2020-10-19 21:49:28,984 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-19 21:49:28,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-19 21:49:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-19 21:49:28,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2020-10-19 21:49:28,990 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 31 [2020-10-19 21:49:28,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:28,991 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2020-10-19 21:49:28,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:28,991 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2020-10-19 21:49:28,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-19 21:49:28,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:28,992 INFO L422 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, 1] [2020-10-19 21:49:29,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-19 21:49:29,206 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:29,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:29,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1808056250, now seen corresponding path program 2 times [2020-10-19 21:49:29,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:29,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326409526] [2020-10-19 21:49:29,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-19 21:49:29,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326409526] [2020-10-19 21:49:29,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295353678] [2020-10-19 21:49:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:29,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2020-10-19 21:49:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:29,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-19 21:49:29,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 21:49:29,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:29,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-10-19 21:49:29,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427760450] [2020-10-19 21:49:29,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-19 21:49:29,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:29,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-19 21:49:29,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-19 21:49:29,382 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand 8 states. [2020-10-19 21:49:29,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:29,519 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-19 21:49:29,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-19 21:49:29,519 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-19 21:49:29,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:29,521 INFO L225 Difference]: With dead ends: 120 [2020-10-19 21:49:29,521 INFO L226 Difference]: Without dead ends: 114 [2020-10-19 21:49:29,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-19 21:49:29,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-19 21:49:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 74. [2020-10-19 21:49:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-19 21:49:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2020-10-19 21:49:29,533 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 33 [2020-10-19 21:49:29,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:29,534 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2020-10-19 21:49:29,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-19 21:49:29,534 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2020-10-19 21:49:29,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-19 21:49:29,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:29,536 INFO L422 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, 1] [2020-10-19 21:49:29,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:29,750 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:29,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:29,751 INFO L82 PathProgramCache]: Analyzing trace with hash -883385759, now seen corresponding path program 1 times [2020-10-19 21:49:29,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:29,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844001152] [2020-10-19 21:49:29,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-19 21:49:29,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844001152] [2020-10-19 21:49:29,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441551750] [2020-10-19 21:49:29,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:29,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:29,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:29,905 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-19 21:49:29,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-19 21:49:29,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2020-10-19 21:49:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050711251] [2020-10-19 21:49:29,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:29,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:29,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:29,910 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand 7 states. [2020-10-19 21:49:30,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:30,018 INFO L93 Difference]: Finished difference Result 164 states and 223 transitions. [2020-10-19 21:49:30,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:30,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-19 21:49:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:30,021 INFO L225 Difference]: With dead ends: 164 [2020-10-19 21:49:30,022 INFO L226 Difference]: Without dead ends: 97 [2020-10-19 21:49:30,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:30,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-19 21:49:30,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 91. [2020-10-19 21:49:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-19 21:49:30,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-19 21:49:30,048 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 36 [2020-10-19 21:49:30,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:30,048 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-19 21:49:30,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-19 21:49:30,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-19 21:49:30,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:30,053 INFO L422 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, 1] [2020-10-19 21:49:30,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:30,269 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:30,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:30,270 INFO L82 PathProgramCache]: Analyzing trace with hash 984846308, now seen corresponding path program 2 times [2020-10-19 21:49:30,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:30,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579445555] [2020-10-19 21:49:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:30,289 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:30,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175037885] [2020-10-19 21:49:30,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:30,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:30,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:30,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:49:30,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-10-19 21:49:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579445555] [2020-10-19 21:49:30,425 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:30,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175037885] [2020-10-19 21:49:30,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:30,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-19 21:49:30,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307767006] [2020-10-19 21:49:30,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:49:30,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:30,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:49:30,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:30,427 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 6 states. [2020-10-19 21:49:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:30,449 INFO L93 Difference]: Finished difference Result 176 states and 226 transitions. [2020-10-19 21:49:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 21:49:30,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-19 21:49:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:30,450 INFO L225 Difference]: With dead ends: 176 [2020-10-19 21:49:30,450 INFO L226 Difference]: Without dead ends: 94 [2020-10-19 21:49:30,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-19 21:49:30,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-19 21:49:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-19 21:49:30,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 118 transitions. [2020-10-19 21:49:30,459 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 118 transitions. Word has length 47 [2020-10-19 21:49:30,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:30,459 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 118 transitions. [2020-10-19 21:49:30,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:49:30,459 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 118 transitions. [2020-10-19 21:49:30,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-19 21:49:30,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:30,461 INFO L422 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, 1] [2020-10-19 21:49:30,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-19 21:49:30,675 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash 999874210, now seen corresponding path program 3 times [2020-10-19 21:49:30,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:30,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398537486] [2020-10-19 21:49:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:30,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-10-19 21:49:30,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398537486] [2020-10-19 21:49:30,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:30,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:49:30,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231187114] [2020-10-19 21:49:30,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:30,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:30,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:30,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:30,750 INFO L87 Difference]: Start difference. First operand 93 states and 118 transitions. Second operand 4 states. [2020-10-19 21:49:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:30,815 INFO L93 Difference]: Finished difference Result 179 states and 234 transitions. [2020-10-19 21:49:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:30,816 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-19 21:49:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:30,817 INFO L225 Difference]: With dead ends: 179 [2020-10-19 21:49:30,817 INFO L226 Difference]: Without dead ends: 109 [2020-10-19 21:49:30,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:30,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-19 21:49:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 84. [2020-10-19 21:49:30,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-19 21:49:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 100 transitions. [2020-10-19 21:49:30,833 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 100 transitions. Word has length 49 [2020-10-19 21:49:30,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:30,833 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 100 transitions. [2020-10-19 21:49:30,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 100 transitions. [2020-10-19 21:49:30,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-19 21:49:30,835 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:30,835 INFO L422 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, 1] [2020-10-19 21:49:30,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-19 21:49:30,835 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:30,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:30,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1208175976, now seen corresponding path program 1 times [2020-10-19 21:49:30,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:30,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447905029] [2020-10-19 21:49:30,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:30,856 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:30,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [204822991] [2020-10-19 21:49:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:30,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 21:49:30,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:30,961 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-10-19 21:49:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447905029] [2020-10-19 21:49:30,962 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204822991] [2020-10-19 21:49:30,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:30,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 21:49:30,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010479851] [2020-10-19 21:49:30,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:30,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:30,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:30,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:30,964 INFO L87 Difference]: Start difference. First operand 84 states and 100 transitions. Second operand 7 states. [2020-10-19 21:49:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:30,997 INFO L93 Difference]: Finished difference Result 159 states and 191 transitions. [2020-10-19 21:49:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:30,997 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-19 21:49:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:30,998 INFO L225 Difference]: With dead ends: 159 [2020-10-19 21:49:30,999 INFO L226 Difference]: Without dead ends: 86 [2020-10-19 21:49:30,999 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:31,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-19 21:49:31,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-10-19 21:49:31,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-19 21:49:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-19 21:49:31,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 55 [2020-10-19 21:49:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:31,007 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-19 21:49:31,007 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:31,008 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-19 21:49:31,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-19 21:49:31,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:31,009 INFO L422 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, 1] [2020-10-19 21:49:31,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:31,225 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -394370218, now seen corresponding path program 2 times [2020-10-19 21:49:31,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:31,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593116114] [2020-10-19 21:49:31,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:31,238 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:31,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012282388] [2020-10-19 21:49:31,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:31,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:31,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:31,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-19 21:49:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593116114] [2020-10-19 21:49:31,606 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:31,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012282388] [2020-10-19 21:49:31,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:31,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 21:49:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68974084] [2020-10-19 21:49:31,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:31,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:31,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:31,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:31,609 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 5 states. [2020-10-19 21:49:31,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:31,689 INFO L93 Difference]: Finished difference Result 168 states and 204 transitions. [2020-10-19 21:49:31,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:49:31,690 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-19 21:49:31,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:31,691 INFO L225 Difference]: With dead ends: 168 [2020-10-19 21:49:31,691 INFO L226 Difference]: Without dead ends: 101 [2020-10-19 21:49:31,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:31,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-19 21:49:31,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-19 21:49:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-19 21:49:31,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 117 transitions. [2020-10-19 21:49:31,699 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 117 transitions. Word has length 57 [2020-10-19 21:49:31,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:31,700 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 117 transitions. [2020-10-19 21:49:31,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:31,700 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 117 transitions. [2020-10-19 21:49:31,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-19 21:49:31,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:31,702 INFO L422 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, 1] [2020-10-19 21:49:31,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:31,912 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:31,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1115957675, now seen corresponding path program 3 times [2020-10-19 21:49:31,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:31,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155524755] [2020-10-19 21:49:31,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:31,930 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:31,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [918403177] [2020-10-19 21:49:31,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:31,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-19 21:49:31,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:31,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:31,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:32,031 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-10-19 21:49:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155524755] [2020-10-19 21:49:32,032 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:32,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918403177] [2020-10-19 21:49:32,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-19 21:49:32,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-19 21:49:32,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661605628] [2020-10-19 21:49:32,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:32,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:32,034 INFO L87 Difference]: Start difference. First operand 101 states and 117 transitions. Second operand 4 states. [2020-10-19 21:49:32,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:32,153 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2020-10-19 21:49:32,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:32,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-19 21:49:32,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:32,155 INFO L225 Difference]: With dead ends: 134 [2020-10-19 21:49:32,155 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 21:49:32,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:32,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 21:49:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 67. [2020-10-19 21:49:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-19 21:49:32,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-19 21:49:32,160 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 66 [2020-10-19 21:49:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:32,161 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-19 21:49:32,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-19 21:49:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-19 21:49:32,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:32,162 INFO L422 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, 1] [2020-10-19 21:49:32,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-19 21:49:32,373 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:32,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:32,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1249971181, now seen corresponding path program 1 times [2020-10-19 21:49:32,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:32,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115484181] [2020-10-19 21:49:32,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:32,386 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:32,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1231841917] [2020-10-19 21:49:32,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:32,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-19 21:49:32,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-19 21:49:32,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-19 21:49:32,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115484181] [2020-10-19 21:49:32,504 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:32,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231841917] [2020-10-19 21:49:32,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:32,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-19 21:49:32,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836108139] [2020-10-19 21:49:32,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-19 21:49:32,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:32,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-19 21:49:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:32,506 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 7 states. [2020-10-19 21:49:32,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:32,611 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2020-10-19 21:49:32,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-19 21:49:32,612 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-10-19 21:49:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:32,613 INFO L225 Difference]: With dead ends: 116 [2020-10-19 21:49:32,613 INFO L226 Difference]: Without dead ends: 76 [2020-10-19 21:49:32,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-19 21:49:32,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-19 21:49:32,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-10-19 21:49:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-19 21:49:32,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 86 transitions. [2020-10-19 21:49:32,619 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 86 transitions. Word has length 66 [2020-10-19 21:49:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:32,619 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 86 transitions. [2020-10-19 21:49:32,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-19 21:49:32,620 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 86 transitions. [2020-10-19 21:49:32,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-19 21:49:32,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:32,621 INFO L422 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, 1] [2020-10-19 21:49:32,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-19 21:49:32,832 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -2135390482, now seen corresponding path program 2 times [2020-10-19 21:49:32,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:32,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117854715] [2020-10-19 21:49:32,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:32,844 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:32,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [416957630] [2020-10-19 21:49:32,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:32,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-19 21:49:32,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:32,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-19 21:49:32,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-19 21:49:32,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117854715] [2020-10-19 21:49:32,954 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:32,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416957630] [2020-10-19 21:49:32,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:32,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-19 21:49:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589652781] [2020-10-19 21:49:32,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-19 21:49:32,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-19 21:49:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:32,956 INFO L87 Difference]: Start difference. First operand 76 states and 86 transitions. Second operand 4 states. [2020-10-19 21:49:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:32,974 INFO L93 Difference]: Finished difference Result 102 states and 115 transitions. [2020-10-19 21:49:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-19 21:49:32,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 75 [2020-10-19 21:49:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:32,975 INFO L225 Difference]: With dead ends: 102 [2020-10-19 21:49:32,975 INFO L226 Difference]: Without dead ends: 79 [2020-10-19 21:49:32,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-19 21:49:32,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-19 21:49:32,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2020-10-19 21:49:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-19 21:49:32,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2020-10-19 21:49:32,981 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 75 [2020-10-19 21:49:32,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:32,981 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2020-10-19 21:49:32,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-19 21:49:32,982 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2020-10-19 21:49:32,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-19 21:49:32,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:32,983 INFO L422 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, 1] [2020-10-19 21:49:33,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-19 21:49:33,196 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:33,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash 949517612, now seen corresponding path program 3 times [2020-10-19 21:49:33,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:33,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323559311] [2020-10-19 21:49:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:33,212 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:33,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1531207366] [2020-10-19 21:49:33,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:33,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-19 21:49:33,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:33,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-19 21:49:33,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:33,593 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-19 21:49:33,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323559311] [2020-10-19 21:49:33,593 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:33,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531207366] [2020-10-19 21:49:33,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:33,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-19 21:49:33,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177601828] [2020-10-19 21:49:33,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-19 21:49:33,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:33,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-19 21:49:33,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,595 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand 5 states. [2020-10-19 21:49:33,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:33,613 INFO L93 Difference]: Finished difference Result 104 states and 117 transitions. [2020-10-19 21:49:33,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-19 21:49:33,614 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 77 [2020-10-19 21:49:33,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:33,615 INFO L225 Difference]: With dead ends: 104 [2020-10-19 21:49:33,615 INFO L226 Difference]: Without dead ends: 81 [2020-10-19 21:49:33,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-19 21:49:33,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-19 21:49:33,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-19 21:49:33,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-19 21:49:33,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2020-10-19 21:49:33,620 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 77 [2020-10-19 21:49:33,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:33,620 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2020-10-19 21:49:33,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-19 21:49:33,620 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2020-10-19 21:49:33,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-19 21:49:33,621 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:33,621 INFO L422 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, 1] [2020-10-19 21:49:33,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:33,833 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:33,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:33,833 INFO L82 PathProgramCache]: Analyzing trace with hash 2018761706, now seen corresponding path program 4 times [2020-10-19 21:49:33,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:33,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97878349] [2020-10-19 21:49:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:33,845 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:33,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270553455] [2020-10-19 21:49:33,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:33,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-19 21:49:33,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-19 21:49:33,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-19 21:49:33,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-19 21:49:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2020-10-19 21:49:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97878349] [2020-10-19 21:49:33,957 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-10-19 21:49:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270553455] [2020-10-19 21:49:33,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-19 21:49:33,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-19 21:49:33,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409761103] [2020-10-19 21:49:33,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-19 21:49:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-19 21:49:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-19 21:49:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:33,959 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand 6 states. [2020-10-19 21:49:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-19 21:49:33,980 INFO L93 Difference]: Finished difference Result 105 states and 118 transitions. [2020-10-19 21:49:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-19 21:49:33,980 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 79 [2020-10-19 21:49:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-19 21:49:33,981 INFO L225 Difference]: With dead ends: 105 [2020-10-19 21:49:33,981 INFO L226 Difference]: Without dead ends: 82 [2020-10-19 21:49:33,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-19 21:49:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-19 21:49:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-19 21:49:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-19 21:49:33,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 92 transitions. [2020-10-19 21:49:33,985 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 92 transitions. Word has length 79 [2020-10-19 21:49:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-19 21:49:33,986 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 92 transitions. [2020-10-19 21:49:33,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-19 21:49:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 92 transitions. [2020-10-19 21:49:33,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-19 21:49:33,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-19 21:49:33,987 INFO L422 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, 1] [2020-10-19 21:49:34,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-19 21:49:34,198 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-19 21:49:34,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-19 21:49:34,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1229815000, now seen corresponding path program 5 times [2020-10-19 21:49:34,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-19 21:49:34,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190246578] [2020-10-19 21:49:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-19 21:49:34,210 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-10-19 21:49:34,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1137443652] [2020-10-19 21:49:34,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-19 21:49:34,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-19 21:49:34,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-10-19 21:49:34,565 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:49:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-19 21:49:34,655 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-19 21:49:34,739 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-19 21:49:34,739 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-19 21:49:34,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-19 21:49:35,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.10 09:49:35 BoogieIcfgContainer [2020-10-19 21:49:35,065 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-19 21:49:35,065 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-10-19 21:49:35,065 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-10-19 21:49:35,065 INFO L275 PluginConnector]: Witness Printer initialized [2020-10-19 21:49:35,066 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.10 09:49:26" (3/4) ... [2020-10-19 21:49:35,067 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-10-19 21:49:35,145 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2020-10-19 21:49:35,145 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-10-19 21:49:35,148 INFO L168 Benchmark]: Toolchain (without parser) took 9759.16 ms. Allocated memory was 35.7 MB in the beginning and 65.0 MB in the end (delta: 29.4 MB). Free memory was 15.0 MB in the beginning and 12.4 MB in the end (delta: 2.6 MB). Peak memory consumption was 31.9 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,148 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,149 INFO L168 Benchmark]: CACSL2BoogieTranslator took 418.94 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 14.0 MB in the beginning and 24.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,149 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.22 ms. Allocated memory is still 44.6 MB. Free memory was 24.8 MB in the beginning and 22.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,150 INFO L168 Benchmark]: Boogie Preprocessor took 37.72 ms. Allocated memory is still 44.6 MB. Free memory was 22.6 MB in the beginning and 20.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,151 INFO L168 Benchmark]: RCFGBuilder took 425.83 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 20.8 MB in the beginning and 28.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,151 INFO L168 Benchmark]: TraceAbstraction took 8737.66 ms. Allocated memory was 46.1 MB in the beginning and 65.0 MB in the end (delta: 18.9 MB). Free memory was 27.5 MB in the beginning and 20.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 25.5 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,152 INFO L168 Benchmark]: Witness Printer took 80.44 ms. Allocated memory is still 65.0 MB. Free memory was 20.9 MB in the beginning and 12.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 14.3 GB. [2020-10-19 21:49:35,155 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 33.6 MB. Free memory was 9.7 MB in the beginning and 9.7 MB in the end (delta: 43.6 kB). Peak memory consumption was 43.6 kB. Max. memory is 14.3 GB. * CACSL2BoogieTranslator took 418.94 ms. Allocated memory was 35.7 MB in the beginning and 44.6 MB in the end (delta: 8.9 MB). Free memory was 14.0 MB in the beginning and 24.8 MB in the end (delta: -10.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 14.3 GB. * Boogie Procedure Inliner took 48.22 ms. Allocated memory is still 44.6 MB. Free memory was 24.8 MB in the beginning and 22.6 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 14.3 GB. * Boogie Preprocessor took 37.72 ms. Allocated memory is still 44.6 MB. Free memory was 22.6 MB in the beginning and 20.8 MB in the end (delta: 1.8 MB). Peak memory consumption was 1.8 MB. Max. memory is 14.3 GB. * RCFGBuilder took 425.83 ms. Allocated memory was 44.6 MB in the beginning and 46.1 MB in the end (delta: 1.6 MB). Free memory was 20.8 MB in the beginning and 28.0 MB in the end (delta: -7.2 MB). Peak memory consumption was 10.0 MB. Max. memory is 14.3 GB. * TraceAbstraction took 8737.66 ms. Allocated memory was 46.1 MB in the beginning and 65.0 MB in the end (delta: 18.9 MB). Free memory was 27.5 MB in the beginning and 20.9 MB in the end (delta: 6.7 MB). Peak memory consumption was 25.5 MB. Max. memory is 14.3 GB. * Witness Printer took 80.44 ms. Allocated memory is still 65.0 MB. Free memory was 20.9 MB in the beginning and 12.4 MB in the end (delta: 8.5 MB). Peak memory consumption was 8.5 MB. Max. memory is 14.3 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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 [L12] COND FALSE !(0) [L12] __assert_fail ("0", "rangesum05.c", 18, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.5s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 544 SDtfs, 254 SDslu, 789 SDs, 0 SdLazy, 371 SolverSat, 117 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 736 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 100 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1048 NumberOfCodeBlocks, 965 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 944 ConstructedInterpolants, 0 QuantifiedInterpolants, 60750 SizeOfPredicates, 18 NumberOfNonLiveVariables, 2591 ConjunctsInSsa, 65 ConjunctsInUnsatCore, 23 InterpolantComputations, 8 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! Received shutdown request...