./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array29_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array29_pattern.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 00:51:03,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 00:51:03,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 00:51:03,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 00:51:03,223 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 00:51:03,224 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 00:51:03,225 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 00:51:03,226 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 00:51:03,227 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 00:51:03,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 00:51:03,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 00:51:03,229 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 00:51:03,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 00:51:03,230 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 00:51:03,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 00:51:03,232 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 00:51:03,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 00:51:03,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 00:51:03,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 00:51:03,244 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 00:51:03,247 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 00:51:03,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 00:51:03,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 00:51:03,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 00:51:03,254 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 00:51:03,256 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 00:51:03,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 00:51:03,257 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 00:51:03,258 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 00:51:03,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 00:51:03,259 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 00:51:03,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 00:51:03,260 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 00:51:03,261 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 00:51:03,262 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 00:51:03,262 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 00:51:03,263 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 00:51:03,263 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 00:51:03,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 00:51:03,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 00:51:03,264 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 00:51:03,265 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 00:51:03,281 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 00:51:03,287 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 00:51:03,287 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 00:51:03,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 00:51:03,288 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 00:51:03,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 00:51:03,289 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 00:51:03,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 00:51:03,289 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 00:51:03,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 00:51:03,290 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 00:51:03,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 00:51:03,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 00:51:03,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 00:51:03,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 00:51:03,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 00:51:03,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 00:51:03,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 00:51:03,292 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 00:51:03,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:51:03,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 00:51:03,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 00:51:03,293 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 00:51:03,293 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 00:51:03,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 00:51:03,294 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 00:51:03,294 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 00:51:03,294 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 00:51:03,294 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 00:51:03,294 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-17 00:51:03,454 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:51:03,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:51:03,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:51:03,487 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:51:03,487 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:51:03,488 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-17 00:51:03,530 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2084affb/ddb6dda20ed6452dae1d321a1dcab8b1/FLAG8b92e319b [2021-12-17 00:51:03,890 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:51:03,890 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-17 00:51:03,894 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2084affb/ddb6dda20ed6452dae1d321a1dcab8b1/FLAG8b92e319b [2021-12-17 00:51:03,904 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2084affb/ddb6dda20ed6452dae1d321a1dcab8b1 [2021-12-17 00:51:03,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:51:03,908 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:51:03,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:51:03,910 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:51:03,912 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:51:03,912 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:51:03" (1/1) ... [2021-12-17 00:51:03,913 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d6b62c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:03, skipping insertion in model container [2021-12-17 00:51:03,913 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:51:03" (1/1) ... [2021-12-17 00:51:03,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:51:03,933 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:51:04,036 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-17 00:51:04,045 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:51:04,050 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:51:04,062 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-17 00:51:04,071 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:51:04,078 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:51:04,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04 WrapperNode [2021-12-17 00:51:04,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:51:04,079 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:51:04,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:51:04,080 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:51:04,084 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,088 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,098 INFO L137 Inliner]: procedures = 16, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 72 [2021-12-17 00:51:04,099 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:51:04,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:51:04,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:51:04,100 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:51:04,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,104 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,111 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,113 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:51:04,114 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:51:04,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:51:04,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:51:04,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (1/1) ... [2021-12-17 00:51:04,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:51:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:04,144 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:51:04,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:51:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:51:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 00:51:04,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:51:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-17 00:51:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:51:04,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:51:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-17 00:51:04,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:51:04,216 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:51:04,217 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:51:04,324 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:51:04,327 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:51:04,331 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 00:51:04,333 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:51:04 BoogieIcfgContainer [2021-12-17 00:51:04,335 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:51:04,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:51:04,337 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:51:04,339 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:51:04,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:51:03" (1/3) ... [2021-12-17 00:51:04,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704842b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:51:04, skipping insertion in model container [2021-12-17 00:51:04,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:51:04" (2/3) ... [2021-12-17 00:51:04,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@704842b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:51:04, skipping insertion in model container [2021-12-17 00:51:04,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:51:04" (3/3) ... [2021-12-17 00:51:04,349 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-17 00:51:04,352 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:51:04,352 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:51:04,392 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:51:04,396 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:51:04,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:51:04,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:51:04,412 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:04,413 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:04,413 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:04,416 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-17 00:51:04,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:04,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281071208] [2021-12-17 00:51:04,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:04,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:51:04,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:04,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281071208] [2021-12-17 00:51:04,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281071208] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:04,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:04,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:51:04,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436853032] [2021-12-17 00:51:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:04,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:51:04,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:04,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:51:04,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:51:04,584 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:04,596 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-17 00:51:04,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:51:04,598 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:51:04,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:04,603 INFO L225 Difference]: With dead ends: 41 [2021-12-17 00:51:04,604 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 00:51:04,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:51:04,608 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:04,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:04,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 00:51:04,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 00:51:04,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-17 00:51:04,643 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-17 00:51:04,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:04,644 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-17 00:51:04,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,644 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-17 00:51:04,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:51:04,645 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:04,645 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:04,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 00:51:04,646 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:04,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:04,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-17 00:51:04,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:04,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837685555] [2021-12-17 00:51:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:04,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:04,676 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:04,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1450502516] [2021-12-17 00:51:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:04,677 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:04,679 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:04,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 00:51:04,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:04,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:51:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:51:04,838 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:04,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837685555] [2021-12-17 00:51:04,839 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:04,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450502516] [2021-12-17 00:51:04,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450502516] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:04,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:04,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:51:04,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747734252] [2021-12-17 00:51:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:04,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:51:04,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:51:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:51:04,845 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:04,927 INFO L93 Difference]: Finished difference Result 36 states and 46 transitions. [2021-12-17 00:51:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:51:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:51:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:04,930 INFO L225 Difference]: With dead ends: 36 [2021-12-17 00:51:04,932 INFO L226 Difference]: Without dead ends: 27 [2021-12-17 00:51:04,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 00:51:04,935 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 58 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:04,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 11 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:04,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-17 00:51:04,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-12-17 00:51:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-17 00:51:04,941 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 10 [2021-12-17 00:51:04,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:04,944 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-17 00:51:04,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:04,944 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-17 00:51:04,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 00:51:04,944 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:04,944 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:04,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:05,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:05,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:05,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:05,160 INFO L85 PathProgramCache]: Analyzing trace with hash 129650620, now seen corresponding path program 1 times [2021-12-17 00:51:05,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:05,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646295787] [2021-12-17 00:51:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:05,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:05,167 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:05,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1440165855] [2021-12-17 00:51:05,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:05,168 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:05,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:05,169 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:05,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 00:51:05,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:05,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:51:05,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:51:05,235 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:05,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:05,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646295787] [2021-12-17 00:51:05,235 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:05,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440165855] [2021-12-17 00:51:05,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440165855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:05,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:05,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:51:05,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610024340] [2021-12-17 00:51:05,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:51:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:51:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:51:05,237 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:05,279 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-12-17 00:51:05,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:51:05,280 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 00:51:05,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:05,280 INFO L225 Difference]: With dead ends: 40 [2021-12-17 00:51:05,280 INFO L226 Difference]: Without dead ends: 25 [2021-12-17 00:51:05,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:51:05,281 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 23 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:05,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:05,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-17 00:51:05,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2021-12-17 00:51:05,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-17 00:51:05,285 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 16 [2021-12-17 00:51:05,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:05,285 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-17 00:51:05,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-17 00:51:05,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-17 00:51:05,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:05,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:05,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:05,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-12-17 00:51:05,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:05,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:05,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1705469543, now seen corresponding path program 1 times [2021-12-17 00:51:05,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:05,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248105004] [2021-12-17 00:51:05,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:05,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:05,529 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:05,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [146145637] [2021-12-17 00:51:05,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:05,530 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:05,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:05,531 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:05,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 00:51:05,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:05,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:51:05,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:05,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:51:05,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:51:05,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:05,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248105004] [2021-12-17 00:51:05,729 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:05,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146145637] [2021-12-17 00:51:05,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146145637] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:05,730 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:05,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-12-17 00:51:05,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311760303] [2021-12-17 00:51:05,730 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:05,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-17 00:51:05,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:05,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-17 00:51:05,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-17 00:51:05,731 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:05,825 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2021-12-17 00:51:05,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:51:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-17 00:51:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:05,826 INFO L225 Difference]: With dead ends: 47 [2021-12-17 00:51:05,826 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 00:51:05,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:51:05,827 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 65 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:05,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 17 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 00:51:05,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-12-17 00:51:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-12-17 00:51:05,831 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 21 [2021-12-17 00:51:05,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:05,831 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-12-17 00:51:05,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 9 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:05,831 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-12-17 00:51:05,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 00:51:05,832 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:05,832 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:05,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-17 00:51:06,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:06,048 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:06,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:06,048 INFO L85 PathProgramCache]: Analyzing trace with hash 943008096, now seen corresponding path program 2 times [2021-12-17 00:51:06,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:06,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036045199] [2021-12-17 00:51:06,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:06,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:06,055 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125831840] [2021-12-17 00:51:06,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:51:06,058 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:06,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:06,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:06,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 00:51:06,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:51:06,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:06,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:51:06,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:06,170 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:51:06,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:51:06,171 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036045199] [2021-12-17 00:51:06,171 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:06,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125831840] [2021-12-17 00:51:06,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125831840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:51:06,172 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:51:06,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:51:06,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002336885] [2021-12-17 00:51:06,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:51:06,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:51:06,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:06,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:51:06,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:51:06,173 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:06,215 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2021-12-17 00:51:06,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:51:06,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 00:51:06,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:06,217 INFO L225 Difference]: With dead ends: 63 [2021-12-17 00:51:06,217 INFO L226 Difference]: Without dead ends: 41 [2021-12-17 00:51:06,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:51:06,218 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:06,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 30 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:51:06,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-12-17 00:51:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-12-17 00:51:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2021-12-17 00:51:06,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2021-12-17 00:51:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:06,222 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2021-12-17 00:51:06,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2021-12-17 00:51:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-17 00:51:06,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:06,223 INFO L514 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] [2021-12-17 00:51:06,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:06,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:06,439 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash -645339806, now seen corresponding path program 1 times [2021-12-17 00:51:06,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852625275] [2021-12-17 00:51:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:06,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:06,455 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:06,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1388292948] [2021-12-17 00:51:06,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:06,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:06,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:06,457 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:06,458 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 00:51:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:51:06,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:51:06,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:06,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:51:06,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:06,639 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:51:06,639 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:51:06,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852625275] [2021-12-17 00:51:06,640 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:51:06,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388292948] [2021-12-17 00:51:06,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388292948] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:51:06,640 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:51:06,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-12-17 00:51:06,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878893773] [2021-12-17 00:51:06,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:51:06,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-17 00:51:06,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 00:51:06,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-17 00:51:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-12-17 00:51:06,641 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:51:06,820 INFO L93 Difference]: Finished difference Result 97 states and 123 transitions. [2021-12-17 00:51:06,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:51:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-17 00:51:06,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:51:06,821 INFO L225 Difference]: With dead ends: 97 [2021-12-17 00:51:06,821 INFO L226 Difference]: Without dead ends: 75 [2021-12-17 00:51:06,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:51:06,822 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:51:06,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 28 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:51:06,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-17 00:51:06,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 45. [2021-12-17 00:51:06,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-12-17 00:51:06,827 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 26 [2021-12-17 00:51:06,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:51:06,827 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-12-17 00:51:06,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:51:06,828 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-12-17 00:51:06,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:51:06,828 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:51:06,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:51:06,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:51:07,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:07,045 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:51:07,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:51:07,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 2 times [2021-12-17 00:51:07,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 00:51:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297119086] [2021-12-17 00:51:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:51:07,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 00:51:07,052 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-17 00:51:07,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287694947] [2021-12-17 00:51:07,053 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:51:07,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:51:07,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:51:07,054 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 00:51:07,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 00:51:07,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:51:07,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:51:07,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 62 conjunts are in the unsatisfiable core [2021-12-17 00:51:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:51:07,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 55 [2021-12-17 00:51:07,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-12-17 00:51:07,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-12-17 00:51:07,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 80 treesize of output 73 [2021-12-17 00:51:07,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,335 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-17 00:51:07,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 95 [2021-12-17 00:51:07,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-12-17 00:51:07,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 7 [2021-12-17 00:51:07,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 101 treesize of output 92 [2021-12-17 00:51:07,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 138 [2021-12-17 00:51:07,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 87 treesize of output 41 [2021-12-17 00:51:07,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 105 [2021-12-17 00:51:07,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,785 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 167 [2021-12-17 00:51:07,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:07,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 126 treesize of output 57 [2021-12-17 00:51:08,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:51:08,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:51:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 90 treesize of output 36 [2021-12-17 00:51:08,646 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:51:08,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:51:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-12-17 00:51:52,993 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:51:52,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 58 [2021-12-17 00:51:53,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 4 [2021-12-17 00:51:53,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 4 [2021-12-17 00:51:57,003 INFO L354 Elim1Store]: treesize reduction 461, result has 22.7 percent of original size [2021-12-17 00:51:57,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 8477167 treesize of output 8051289 [2021-12-17 00:52:08,944 WARN L227 SmtUtils]: Spent 11.94s on a formula simplification that was a NOOP. DAG size: 2022 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-17 00:52:09,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 00:52:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297119086] [2021-12-17 00:52:09,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-17 00:52:09,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287694947] [2021-12-17 00:52:09,128 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-12-17 00:52:09,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:09,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-12-17 00:52:09,129 ERROR L172 FreeRefinementEngine]: Strategy CAMEL failed to provide any proof altough trace is infeasible [2021-12-17 00:52:09,129 INFO L628 BasicCegarLoop]: Counterexample might be feasible [2021-12-17 00:52:09,134 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 00:52:09,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:09,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 00:52:09,344 INFO L732 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1] [2021-12-17 00:52:09,345 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 00:52:09,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 12:52:09 BoogieIcfgContainer [2021-12-17 00:52:09,355 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 00:52:09,356 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 00:52:09,356 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 00:52:09,356 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 00:52:09,356 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:51:04" (3/4) ... [2021-12-17 00:52:09,360 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-17 00:52:09,361 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 00:52:09,361 INFO L158 Benchmark]: Toolchain (without parser) took 65453.04ms. Allocated memory was 94.4MB in the beginning and 243.3MB in the end (delta: 148.9MB). Free memory was 62.1MB in the beginning and 185.4MB in the end (delta: -123.3MB). Peak memory consumption was 25.9MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,361 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 50.9MB in the beginning and 50.9MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:52:09,361 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.71ms. Allocated memory is still 94.4MB. Free memory was 61.9MB in the beginning and 69.1MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,362 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.46ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,362 INFO L158 Benchmark]: Boogie Preprocessor took 13.85ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 66.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,362 INFO L158 Benchmark]: RCFGBuilder took 221.52ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 56.3MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,362 INFO L158 Benchmark]: TraceAbstraction took 65018.99ms. Allocated memory was 94.4MB in the beginning and 243.3MB in the end (delta: 148.9MB). Free memory was 55.7MB in the beginning and 185.4MB in the end (delta: -129.7MB). Peak memory consumption was 133.8MB. Max. memory is 16.1GB. [2021-12-17 00:52:09,363 INFO L158 Benchmark]: Witness Printer took 4.85ms. Allocated memory is still 243.3MB. Free memory is still 185.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 00:52:09,367 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 94.4MB. Free memory was 50.9MB in the beginning and 50.9MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.71ms. Allocated memory is still 94.4MB. Free memory was 61.9MB in the beginning and 69.1MB in the end (delta: -7.2MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.46ms. Allocated memory is still 94.4MB. Free memory was 69.1MB in the beginning and 67.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.85ms. Allocated memory is still 94.4MB. Free memory was 67.4MB in the beginning and 66.2MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 221.52ms. Allocated memory is still 94.4MB. Free memory was 66.2MB in the beginning and 56.3MB in the end (delta: 9.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 65018.99ms. Allocated memory was 94.4MB in the beginning and 243.3MB in the end (delta: 148.9MB). Free memory was 55.7MB in the beginning and 185.4MB in the end (delta: -129.7MB). Peak memory consumption was 133.8MB. Max. memory is 16.1GB. * Witness Printer took 4.85ms. Allocated memory is still 243.3MB. Free memory is still 185.4MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 31]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L35] signed long long ARR_SIZE ; [L40] ARR_SIZE = (signed long long)__VERIFIER_nondet_short() [L41] CALL assume_abort_if_not(ARR_SIZE > 1) [L29] COND FALSE !(!cond) [L41] RET assume_abort_if_not(ARR_SIZE > 1) [L43] int array[ARR_SIZE][ARR_SIZE] ; [L45] int row = 0, column = 0 ; [L46] signed long long sum = 0 ; [L48] row=0 [L48] COND TRUE row 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 -> c79b0cfbfa84c2390344382edf3f60a855c5e1f87aaed3ee77c2dd6c5f017188 [2021-12-17 00:52:11,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 00:52:11,301 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 00:52:11,304 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 00:52:11,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 00:52:11,305 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 00:52:11,306 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-17 00:52:11,345 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43daaa50/d3ed9908f54d4903b4da80b51c034f01/FLAG9059b73d8 [2021-12-17 00:52:11,696 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 00:52:11,696 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c [2021-12-17 00:52:11,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43daaa50/d3ed9908f54d4903b4da80b51c034f01/FLAG9059b73d8 [2021-12-17 00:52:11,710 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c43daaa50/d3ed9908f54d4903b4da80b51c034f01 [2021-12-17 00:52:11,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 00:52:11,712 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 00:52:11,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 00:52:11,715 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 00:52:11,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 00:52:11,717 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@568c3554 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11, skipping insertion in model container [2021-12-17 00:52:11,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 00:52:11,736 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 00:52:11,827 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-17 00:52:11,839 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:52:11,844 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 00:52:11,878 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array29_pattern.c[1255,1268] [2021-12-17 00:52:11,902 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 00:52:11,915 INFO L208 MainTranslator]: Completed translation [2021-12-17 00:52:11,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11 WrapperNode [2021-12-17 00:52:11,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 00:52:11,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 00:52:11,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 00:52:11,916 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 00:52:11,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,928 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,939 INFO L137 Inliner]: procedures = 18, calls = 15, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2021-12-17 00:52:11,940 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 00:52:11,941 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 00:52:11,941 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 00:52:11,941 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 00:52:11,946 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,960 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,960 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,977 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 00:52:11,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 00:52:11,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 00:52:11,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 00:52:11,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (1/1) ... [2021-12-17 00:52:11,985 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 00:52:11,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 00:52:12,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-17 00:52:12,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-17 00:52:12,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 00:52:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-17 00:52:12,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 00:52:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-17 00:52:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 00:52:12,027 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 00:52:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 00:52:12,027 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-17 00:52:12,087 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 00:52:12,088 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 00:52:12,320 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 00:52:12,324 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 00:52:12,324 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-17 00:52:12,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:52:12 BoogieIcfgContainer [2021-12-17 00:52:12,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 00:52:12,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 00:52:12,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 00:52:12,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 00:52:12,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 12:52:11" (1/3) ... [2021-12-17 00:52:12,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724fbb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:52:12, skipping insertion in model container [2021-12-17 00:52:12,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 12:52:11" (2/3) ... [2021-12-17 00:52:12,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@724fbb24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 12:52:12, skipping insertion in model container [2021-12-17 00:52:12,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 12:52:12" (3/3) ... [2021-12-17 00:52:12,330 INFO L111 eAbstractionObserver]: Analyzing ICFG array29_pattern.c [2021-12-17 00:52:12,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 00:52:12,343 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 00:52:12,390 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 00:52:12,396 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 00:52:12,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 00:52:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:52:12,415 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:12,415 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:12,416 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:12,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:12,420 INFO L85 PathProgramCache]: Analyzing trace with hash -468356531, now seen corresponding path program 1 times [2021-12-17 00:52:12,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:12,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059822535] [2021-12-17 00:52:12,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:12,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:12,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:12,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:12,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-17 00:52:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:12,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-17 00:52:12,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:12,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:12,589 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:12,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059822535] [2021-12-17 00:52:12,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1059822535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:12,590 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:12,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 00:52:12,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119218171] [2021-12-17 00:52:12,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:12,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 00:52:12,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:12,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 00:52:12,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:52:12,615 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.6) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:12,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:12,627 INFO L93 Difference]: Finished difference Result 41 states and 60 transitions. [2021-12-17 00:52:12,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 00:52:12,628 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:52:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:12,635 INFO L225 Difference]: With dead ends: 41 [2021-12-17 00:52:12,635 INFO L226 Difference]: Without dead ends: 18 [2021-12-17 00:52:12,637 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 00:52:12,640 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:12,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-17 00:52:12,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-17 00:52:12,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-17 00:52:12,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:12,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-17 00:52:12,669 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 10 [2021-12-17 00:52:12,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:12,670 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-17 00:52:12,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:12,670 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-17 00:52:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-17 00:52:12,670 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:12,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:12,694 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:12,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:12,886 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1936709868, now seen corresponding path program 1 times [2021-12-17 00:52:12,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:12,891 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [461186567] [2021-12-17 00:52:12,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:12,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:12,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:12,893 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:12,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-17 00:52:12,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:12,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:52:12,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:13,207 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:13,207 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:13,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [461186567] [2021-12-17 00:52:13,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [461186567] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:13,207 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:13,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:52:13,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112268403] [2021-12-17 00:52:13,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:13,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:52:13,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:13,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:52:13,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:13,209 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:13,216 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2021-12-17 00:52:13,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:52:13,216 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-17 00:52:13,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:13,217 INFO L225 Difference]: With dead ends: 28 [2021-12-17 00:52:13,217 INFO L226 Difference]: Without dead ends: 19 [2021-12-17 00:52:13,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:13,218 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 26 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:13,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 26 Unchecked, 0.0s Time] [2021-12-17 00:52:13,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-12-17 00:52:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-12-17 00:52:13,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-12-17 00:52:13,222 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 10 [2021-12-17 00:52:13,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:13,222 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-12-17 00:52:13,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,222 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-12-17 00:52:13,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-17 00:52:13,223 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:13,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:13,232 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:13,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:13,427 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:13,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:13,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1411380456, now seen corresponding path program 1 times [2021-12-17 00:52:13,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:13,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [172124220] [2021-12-17 00:52:13,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:13,429 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:13,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:13,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:13,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-17 00:52:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:13,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:52:13,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:13,724 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:13,724 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:13,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [172124220] [2021-12-17 00:52:13,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [172124220] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:13,725 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:13,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:52:13,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545264023] [2021-12-17 00:52:13,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:13,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:52:13,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:13,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:52:13,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:13,727 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:13,731 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-17 00:52:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:52:13,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-17 00:52:13,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:13,731 INFO L225 Difference]: With dead ends: 34 [2021-12-17 00:52:13,731 INFO L226 Difference]: Without dead ends: 20 [2021-12-17 00:52:13,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:13,732 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:13,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2021-12-17 00:52:13,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-17 00:52:13,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-12-17 00:52:13,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-12-17 00:52:13,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-12-17 00:52:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-12-17 00:52:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:13,736 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-12-17 00:52:13,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 00:52:13,737 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:13,737 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:13,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:13,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:13,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:13,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:13,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1019100115, now seen corresponding path program 1 times [2021-12-17 00:52:13,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:13,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257817994] [2021-12-17 00:52:13,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:13,950 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:13,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:13,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:13,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-17 00:52:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:14,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:52:14,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:14,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:14,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:14,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:14,385 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:14,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257817994] [2021-12-17 00:52:14,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257817994] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:14,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:14,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:52:14,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895512447] [2021-12-17 00:52:14,386 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:14,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:52:14,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:14,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:52:14,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:14,388 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:14,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:14,693 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2021-12-17 00:52:14,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-17 00:52:14,693 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 00:52:14,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:14,694 INFO L225 Difference]: With dead ends: 37 [2021-12-17 00:52:14,694 INFO L226 Difference]: Without dead ends: 23 [2021-12-17 00:52:14,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:14,695 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:14,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 17 Unchecked, 0.3s Time] [2021-12-17 00:52:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-12-17 00:52:14,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-12-17 00:52:14,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:14,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2021-12-17 00:52:14,698 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 16 [2021-12-17 00:52:14,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:14,698 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2021-12-17 00:52:14,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:14,698 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2021-12-17 00:52:14,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 00:52:14,698 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:14,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:14,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:14,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:14,899 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:14,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:14,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1412127125, now seen corresponding path program 1 times [2021-12-17 00:52:14,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:14,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [518487545] [2021-12-17 00:52:14,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:14,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:14,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:14,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:14,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-17 00:52:14,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:14,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 00:52:14,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:15,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:15,033 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:15,033 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:15,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [518487545] [2021-12-17 00:52:15,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [518487545] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:15,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:15,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 00:52:15,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140620667] [2021-12-17 00:52:15,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:15,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 00:52:15,035 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:15,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 00:52:15,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:52:15,035 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:15,146 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-17 00:52:15,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 00:52:15,148 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-17 00:52:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:15,148 INFO L225 Difference]: With dead ends: 53 [2021-12-17 00:52:15,148 INFO L226 Difference]: Without dead ends: 39 [2021-12-17 00:52:15,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 00:52:15,149 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:15,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-17 00:52:15,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-17 00:52:15,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 23. [2021-12-17 00:52:15,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-12-17 00:52:15,154 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 16 [2021-12-17 00:52:15,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:15,155 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-12-17 00:52:15,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,155 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-12-17 00:52:15,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:52:15,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:15,155 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:15,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:15,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:15,356 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:15,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:15,357 INFO L85 PathProgramCache]: Analyzing trace with hash 1387852488, now seen corresponding path program 2 times [2021-12-17 00:52:15,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:15,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [695133914] [2021-12-17 00:52:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:52:15,357 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:15,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:15,360 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-17 00:52:15,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 00:52:15,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:15,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:52:15,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:15,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:52:15,638 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:15,638 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:15,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [695133914] [2021-12-17 00:52:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [695133914] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:15,639 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:15,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:52:15,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562338733] [2021-12-17 00:52:15,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:15,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:52:15,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:15,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:52:15,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:15,640 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:15,642 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2021-12-17 00:52:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:52:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 00:52:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:15,643 INFO L225 Difference]: With dead ends: 34 [2021-12-17 00:52:15,643 INFO L226 Difference]: Without dead ends: 30 [2021-12-17 00:52:15,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:15,644 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:15,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-17 00:52:15,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-17 00:52:15,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-17 00:52:15,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-17 00:52:15,647 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2021-12-17 00:52:15,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:15,648 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-17 00:52:15,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:15,648 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-17 00:52:15,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-17 00:52:15,648 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:15,649 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:15,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:15,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:15,852 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:15,852 INFO L85 PathProgramCache]: Analyzing trace with hash 994825478, now seen corresponding path program 1 times [2021-12-17 00:52:15,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:15,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1036648899] [2021-12-17 00:52:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:15,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:15,853 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:15,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-17 00:52:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:15,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:52:15,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:16,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:16,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:16,681 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:16,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1036648899] [2021-12-17 00:52:16,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1036648899] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:16,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:16,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-12-17 00:52:16,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630636853] [2021-12-17 00:52:16,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:16,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-17 00:52:16,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:16,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-17 00:52:16,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-12-17 00:52:16,683 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:17,155 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2021-12-17 00:52:17,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-17 00:52:17,169 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-17 00:52:17,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:17,170 INFO L225 Difference]: With dead ends: 57 [2021-12-17 00:52:17,170 INFO L226 Difference]: Without dead ends: 48 [2021-12-17 00:52:17,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:52:17,171 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 43 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:17,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 28 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 87 Invalid, 0 Unknown, 43 Unchecked, 0.3s Time] [2021-12-17 00:52:17,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-17 00:52:17,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-17 00:52:17,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 59 transitions. [2021-12-17 00:52:17,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 59 transitions. Word has length 19 [2021-12-17 00:52:17,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:17,178 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 59 transitions. [2021-12-17 00:52:17,178 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 59 transitions. [2021-12-17 00:52:17,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 00:52:17,178 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:17,178 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:17,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:17,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:17,379 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:17,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:17,380 INFO L85 PathProgramCache]: Analyzing trace with hash -712374820, now seen corresponding path program 1 times [2021-12-17 00:52:17,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:17,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [636973211] [2021-12-17 00:52:17,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:17,380 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:17,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:17,381 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:17,382 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-17 00:52:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:17,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:52:17,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:52:17,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:17,592 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:52:17,592 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:17,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [636973211] [2021-12-17 00:52:17,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [636973211] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:17,592 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:17,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 00:52:17,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287540624] [2021-12-17 00:52:17,593 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:17,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:52:17,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:17,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:52:17,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:52:17,593 INFO L87 Difference]: Start difference. First operand 44 states and 59 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:17,919 INFO L93 Difference]: Finished difference Result 115 states and 151 transitions. [2021-12-17 00:52:17,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-17 00:52:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 00:52:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:17,920 INFO L225 Difference]: With dead ends: 115 [2021-12-17 00:52:17,920 INFO L226 Difference]: Without dead ends: 84 [2021-12-17 00:52:17,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:17,921 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 56 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:17,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 67 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:52:17,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-12-17 00:52:17,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 46. [2021-12-17 00:52:17,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2021-12-17 00:52:17,927 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 22 [2021-12-17 00:52:17,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:17,928 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2021-12-17 00:52:17,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:17,928 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2021-12-17 00:52:17,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-17 00:52:17,928 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:17,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:17,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-17 00:52:18,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:18,138 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:18,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:18,138 INFO L85 PathProgramCache]: Analyzing trace with hash 915876278, now seen corresponding path program 2 times [2021-12-17 00:52:18,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:18,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1543129526] [2021-12-17 00:52:18,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:52:18,139 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:18,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:18,139 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:18,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-17 00:52:18,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-17 00:52:18,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:18,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-17 00:52:18,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:52:18,423 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 00:52:18,423 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:18,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1543129526] [2021-12-17 00:52:18,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1543129526] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 00:52:18,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 00:52:18,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-17 00:52:18,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529612697] [2021-12-17 00:52:18,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 00:52:18,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-17 00:52:18,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-17 00:52:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:18,424 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:18,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:18,426 INFO L93 Difference]: Finished difference Result 51 states and 63 transitions. [2021-12-17 00:52:18,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-17 00:52:18,426 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-12-17 00:52:18,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:18,427 INFO L225 Difference]: With dead ends: 51 [2021-12-17 00:52:18,427 INFO L226 Difference]: Without dead ends: 47 [2021-12-17 00:52:18,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 00:52:18,427 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:18,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 25 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-17 00:52:18,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-17 00:52:18,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-12-17 00:52:18,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2826086956521738) internal successors, (59), 46 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2021-12-17 00:52:18,431 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 22 [2021-12-17 00:52:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:18,432 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2021-12-17 00:52:18,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:18,432 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2021-12-17 00:52:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-17 00:52:18,432 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:18,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:18,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:18,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:18,642 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash 367280174, now seen corresponding path program 1 times [2021-12-17 00:52:18,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:18,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [762752033] [2021-12-17 00:52:18,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:18,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:18,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:18,643 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:18,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-17 00:52:18,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:18,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-17 00:52:18,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:19,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 00:52:19,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:19,253 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-17 00:52:19,253 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:19,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [762752033] [2021-12-17 00:52:19,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [762752033] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:19,254 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:19,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-12-17 00:52:19,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347516405] [2021-12-17 00:52:19,254 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:19,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-12-17 00:52:19,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:19,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-12-17 00:52:19,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-12-17 00:52:19,255 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:19,360 INFO L93 Difference]: Finished difference Result 85 states and 112 transitions. [2021-12-17 00:52:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-17 00:52:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-17 00:52:19,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:19,362 INFO L225 Difference]: With dead ends: 85 [2021-12-17 00:52:19,362 INFO L226 Difference]: Without dead ends: 67 [2021-12-17 00:52:19,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:52:19,362 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 8 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:19,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 47 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 21 Unchecked, 0.0s Time] [2021-12-17 00:52:19,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-12-17 00:52:19,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-12-17 00:52:19,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:19,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2021-12-17 00:52:19,368 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 25 [2021-12-17 00:52:19,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:19,368 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2021-12-17 00:52:19,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 15 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:19,368 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2021-12-17 00:52:19,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 00:52:19,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:19,369 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:19,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:19,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:19,579 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:19,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:19,579 INFO L85 PathProgramCache]: Analyzing trace with hash -1229230681, now seen corresponding path program 2 times [2021-12-17 00:52:19,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:19,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1178478358] [2021-12-17 00:52:19,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:52:19,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:19,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:19,580 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:19,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-17 00:52:19,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:52:19,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:19,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:52:19,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:52:20,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:52:20,404 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:20,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1178478358] [2021-12-17 00:52:20,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1178478358] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:20,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:20,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-17 00:52:20,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043602035] [2021-12-17 00:52:20,405 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:20,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:52:20,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:52:20,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:52:20,406 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:20,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:20,974 INFO L93 Difference]: Finished difference Result 164 states and 220 transitions. [2021-12-17 00:52:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:52:20,979 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-12-17 00:52:20,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:20,980 INFO L225 Difference]: With dead ends: 164 [2021-12-17 00:52:20,980 INFO L226 Difference]: Without dead ends: 160 [2021-12-17 00:52:20,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-12-17 00:52:20,981 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 101 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:20,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 87 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 90 Invalid, 0 Unknown, 116 Unchecked, 0.4s Time] [2021-12-17 00:52:20,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-12-17 00:52:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 134. [2021-12-17 00:52:20,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.3909774436090225) internal successors, (185), 133 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:20,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 185 transitions. [2021-12-17 00:52:20,991 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 185 transitions. Word has length 28 [2021-12-17 00:52:20,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:20,992 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 185 transitions. [2021-12-17 00:52:20,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:20,992 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 185 transitions. [2021-12-17 00:52:20,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:52:20,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:20,993 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:21,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:21,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:21,203 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:21,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:21,203 INFO L85 PathProgramCache]: Analyzing trace with hash 604792272, now seen corresponding path program 3 times [2021-12-17 00:52:21,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:21,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [245325503] [2021-12-17 00:52:21,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:52:21,204 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:21,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:21,205 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:21,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-17 00:52:21,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 00:52:21,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:21,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:52:21,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:21,543 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 00:52:21,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-17 00:52:21,697 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:21,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [245325503] [2021-12-17 00:52:21,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [245325503] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:21,697 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:21,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:52:21,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889739873] [2021-12-17 00:52:21,697 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:21,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:52:21,698 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:21,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:52:21,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:21,698 INFO L87 Difference]: Start difference. First operand 134 states and 185 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:21,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:21,766 INFO L93 Difference]: Finished difference Result 145 states and 198 transitions. [2021-12-17 00:52:21,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:52:21,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 00:52:21,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:21,781 INFO L225 Difference]: With dead ends: 145 [2021-12-17 00:52:21,781 INFO L226 Difference]: Without dead ends: 141 [2021-12-17 00:52:21,781 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:21,781 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:21,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 31 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2021-12-17 00:52:21,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-12-17 00:52:21,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 136. [2021-12-17 00:52:21,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3925925925925926) internal successors, (188), 135 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:21,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 188 transitions. [2021-12-17 00:52:21,790 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 188 transitions. Word has length 31 [2021-12-17 00:52:21,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:21,790 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 188 transitions. [2021-12-17 00:52:21,790 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:21,790 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 188 transitions. [2021-12-17 00:52:21,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:52:21,791 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:21,791 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:21,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:22,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:22,000 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:22,001 INFO L85 PathProgramCache]: Analyzing trace with hash 304261789, now seen corresponding path program 4 times [2021-12-17 00:52:22,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:22,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [698451075] [2021-12-17 00:52:22,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:52:22,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:22,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:22,002 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:22,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-17 00:52:22,111 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:52:22,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:22,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:52:22,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:22,445 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:52:22,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:22,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-17 00:52:22,712 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:22,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [698451075] [2021-12-17 00:52:22,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [698451075] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:22,712 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:22,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-17 00:52:22,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942300332] [2021-12-17 00:52:22,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:22,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:52:22,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:22,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:52:22,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:52:22,713 INFO L87 Difference]: Start difference. First operand 136 states and 188 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:23,301 INFO L93 Difference]: Finished difference Result 316 states and 457 transitions. [2021-12-17 00:52:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-17 00:52:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 00:52:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:23,317 INFO L225 Difference]: With dead ends: 316 [2021-12-17 00:52:23,317 INFO L226 Difference]: Without dead ends: 243 [2021-12-17 00:52:23,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:52:23,318 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 23 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:23,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 77 Invalid, 0 Unknown, 45 Unchecked, 0.4s Time] [2021-12-17 00:52:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2021-12-17 00:52:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 229. [2021-12-17 00:52:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.394736842105263) internal successors, (318), 228 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 318 transitions. [2021-12-17 00:52:23,336 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 318 transitions. Word has length 31 [2021-12-17 00:52:23,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:23,336 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 318 transitions. [2021-12-17 00:52:23,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:23,342 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 318 transitions. [2021-12-17 00:52:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-17 00:52:23,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:23,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:23,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:23,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:23,556 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:23,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:23,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1812706138, now seen corresponding path program 5 times [2021-12-17 00:52:23,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:23,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [703181764] [2021-12-17 00:52:23,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-17 00:52:23,557 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:23,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:23,558 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:23,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-17 00:52:23,597 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-12-17 00:52:23,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:23,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-17 00:52:23,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:52:23,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 19 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-17 00:52:24,009 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:24,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [703181764] [2021-12-17 00:52:24,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [703181764] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:24,010 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:24,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-12-17 00:52:24,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106250617] [2021-12-17 00:52:24,010 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:24,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-17 00:52:24,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:24,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-17 00:52:24,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-17 00:52:24,011 INFO L87 Difference]: Start difference. First operand 229 states and 318 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:24,992 INFO L93 Difference]: Finished difference Result 532 states and 750 transitions. [2021-12-17 00:52:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:52:25,007 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-17 00:52:25,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:25,009 INFO L225 Difference]: With dead ends: 532 [2021-12-17 00:52:25,009 INFO L226 Difference]: Without dead ends: 447 [2021-12-17 00:52:25,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-12-17 00:52:25,012 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 164 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:25,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 87 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-17 00:52:25,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-12-17 00:52:25,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 236. [2021-12-17 00:52:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.323404255319149) internal successors, (311), 235 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:25,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 311 transitions. [2021-12-17 00:52:25,031 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 311 transitions. Word has length 31 [2021-12-17 00:52:25,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:25,032 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 311 transitions. [2021-12-17 00:52:25,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:25,032 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 311 transitions. [2021-12-17 00:52:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 00:52:25,033 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:25,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:25,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:25,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:25,240 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:25,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:25,240 INFO L85 PathProgramCache]: Analyzing trace with hash 830764686, now seen corresponding path program 1 times [2021-12-17 00:52:25,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1789818682] [2021-12-17 00:52:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 00:52:25,240 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:25,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:25,241 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:25,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-17 00:52:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 00:52:25,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-17 00:52:25,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 3 proven. 23 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-17 00:52:25,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-17 00:52:25,949 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:25,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1789818682] [2021-12-17 00:52:25,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1789818682] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:25,950 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:25,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-12-17 00:52:25,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039374112] [2021-12-17 00:52:25,950 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-17 00:52:25,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-17 00:52:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-17 00:52:25,951 INFO L87 Difference]: Start difference. First operand 236 states and 311 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:26,476 INFO L93 Difference]: Finished difference Result 353 states and 459 transitions. [2021-12-17 00:52:26,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-17 00:52:26,490 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-12-17 00:52:26,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:26,491 INFO L225 Difference]: With dead ends: 353 [2021-12-17 00:52:26,491 INFO L226 Difference]: Without dead ends: 331 [2021-12-17 00:52:26,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2021-12-17 00:52:26,493 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:26,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 63 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 69 Invalid, 0 Unknown, 50 Unchecked, 0.4s Time] [2021-12-17 00:52:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2021-12-17 00:52:26,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 219. [2021-12-17 00:52:26,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.3256880733944953) internal successors, (289), 218 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:26,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 289 transitions. [2021-12-17 00:52:26,504 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 289 transitions. Word has length 33 [2021-12-17 00:52:26,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:26,504 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 289 transitions. [2021-12-17 00:52:26,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:26,504 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 289 transitions. [2021-12-17 00:52:26,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:52:26,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:26,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:26,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-17 00:52:26,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:26,722 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:26,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:26,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1109495980, now seen corresponding path program 2 times [2021-12-17 00:52:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:26,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [256731267] [2021-12-17 00:52:26,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-17 00:52:26,723 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:26,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:26,724 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:26,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-17 00:52:26,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-17 00:52:26,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:26,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-17 00:52:26,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:26,909 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:52:26,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:26,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-17 00:52:26,975 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:26,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [256731267] [2021-12-17 00:52:26,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [256731267] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:26,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:26,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-17 00:52:26,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131391020] [2021-12-17 00:52:26,976 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:26,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-17 00:52:26,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:26,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-17 00:52:26,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-17 00:52:26,976 INFO L87 Difference]: Start difference. First operand 219 states and 289 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:27,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:27,315 INFO L93 Difference]: Finished difference Result 496 states and 644 transitions. [2021-12-17 00:52:27,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-17 00:52:27,316 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 00:52:27,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:27,317 INFO L225 Difference]: With dead ends: 496 [2021-12-17 00:52:27,317 INFO L226 Difference]: Without dead ends: 367 [2021-12-17 00:52:27,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-17 00:52:27,318 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 97 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:27,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 52 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-17 00:52:27,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-12-17 00:52:27,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 260. [2021-12-17 00:52:27,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.3166023166023166) internal successors, (341), 259 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:27,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 341 transitions. [2021-12-17 00:52:27,330 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 341 transitions. Word has length 35 [2021-12-17 00:52:27,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:27,331 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 341 transitions. [2021-12-17 00:52:27,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:27,331 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 341 transitions. [2021-12-17 00:52:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 00:52:27,332 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:27,332 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:27,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:27,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:27,541 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -338796528, now seen corresponding path program 3 times [2021-12-17 00:52:27,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:27,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [89118632] [2021-12-17 00:52:27,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-17 00:52:27,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:27,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:27,544 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:27,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-17 00:52:27,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-17 00:52:27,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:27,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-17 00:52:27,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:27,892 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 00:52:27,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:52:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-17 00:52:28,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-17 00:52:28,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [89118632] [2021-12-17 00:52:28,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [89118632] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-17 00:52:28,035 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 00:52:28,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-17 00:52:28,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645865864] [2021-12-17 00:52:28,036 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 00:52:28,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-17 00:52:28,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-17 00:52:28,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-17 00:52:28,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:28,037 INFO L87 Difference]: Start difference. First operand 260 states and 341 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:28,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 00:52:28,251 INFO L93 Difference]: Finished difference Result 282 states and 366 transitions. [2021-12-17 00:52:28,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-17 00:52:28,266 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-17 00:52:28,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 00:52:28,267 INFO L225 Difference]: With dead ends: 282 [2021-12-17 00:52:28,267 INFO L226 Difference]: Without dead ends: 278 [2021-12-17 00:52:28,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-12-17 00:52:28,267 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-17 00:52:28,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 32 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2021-12-17 00:52:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-17 00:52:28,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 192. [2021-12-17 00:52:28,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2827225130890052) internal successors, (245), 191 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:28,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 245 transitions. [2021-12-17 00:52:28,278 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 245 transitions. Word has length 35 [2021-12-17 00:52:28,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 00:52:28,278 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 245 transitions. [2021-12-17 00:52:28,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 00:52:28,278 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 245 transitions. [2021-12-17 00:52:28,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-17 00:52:28,278 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 00:52:28,278 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 00:52:28,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-12-17 00:52:28,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-17 00:52:28,479 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 00:52:28,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 00:52:28,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1156561688, now seen corresponding path program 4 times [2021-12-17 00:52:28,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-17 00:52:28,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230936423] [2021-12-17 00:52:28,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-17 00:52:28,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-17 00:52:28,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-17 00:52:28,481 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-17 00:52:28,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-17 00:52:28,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-17 00:52:28,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-17 00:52:28,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-17 00:52:28,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 00:52:28,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-17 00:52:29,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:29,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 38 [2021-12-17 00:52:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:29,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:29,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:29,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:52:29,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-12-17 00:52:30,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:30,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:52:30,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 51 [2021-12-17 00:52:31,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:31,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:31,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:31,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:31,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 00:52:31,687 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 00:52:31,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 20 [2021-12-17 00:52:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 00:52:31,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 00:54:58,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 289 treesize of output 281 [2021-12-17 00:55:03,195 INFO L354 Elim1Store]: treesize reduction 41, result has 53.4 percent of original size [2021-12-17 00:55:03,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 942057074 treesize of output 920037024 Killed by 15