./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/bitvector-loops/overflow_1-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3dbbec33 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/bitvector-loops/overflow_1-2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3dbbec3 [2023-02-14 10:50:40,179 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 10:50:40,181 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 10:50:40,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 10:50:40,207 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 10:50:40,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 10:50:40,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 10:50:40,212 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 10:50:40,213 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 10:50:40,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 10:50:40,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 10:50:40,219 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 10:50:40,219 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 10:50:40,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 10:50:40,223 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 10:50:40,223 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 10:50:40,224 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 10:50:40,225 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 10:50:40,226 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 10:50:40,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 10:50:40,230 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 10:50:40,231 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 10:50:40,232 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 10:50:40,232 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 10:50:40,238 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 10:50:40,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 10:50:40,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 10:50:40,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 10:50:40,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 10:50:40,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 10:50:40,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 10:50:40,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 10:50:40,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 10:50:40,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 10:50:40,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 10:50:40,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 10:50:40,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 10:50:40,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 10:50:40,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 10:50:40,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 10:50:40,245 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 10:50:40,245 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 10:50:40,267 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 10:50:40,267 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 10:50:40,267 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 10:50:40,267 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 10:50:40,272 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 10:50:40,273 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 10:50:40,273 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 10:50:40,273 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 10:50:40,273 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 10:50:40,274 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 10:50:40,274 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 10:50:40,274 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 10:50:40,275 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 10:50:40,276 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 10:50:40,276 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 10:50:40,276 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 10:50:40,276 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 10:50:40,276 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 10:50:40,276 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:50:40,277 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 10:50:40,277 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 10:50:40,277 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 10:50:40,277 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 10:50:40,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 10:50:40,277 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 10:50:40,278 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 10:50:40,278 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 10:50:40,278 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 10:50:40,278 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 10:50:40,278 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd15e6a5481e5709ee106d67fec16050e066e3720bb675b6df23302700c97f29 [2023-02-14 10:50:40,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 10:50:40,488 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 10:50:40,490 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 10:50:40,491 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 10:50:40,493 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 10:50:40,494 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2023-02-14 10:50:41,413 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 10:50:41,542 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 10:50:41,543 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c [2023-02-14 10:50:41,546 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe144c39/dde9b1b44b3e4ebfad6c82a928453a6f/FLAGed947f3ca [2023-02-14 10:50:41,985 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/abe144c39/dde9b1b44b3e4ebfad6c82a928453a6f [2023-02-14 10:50:41,989 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 10:50:41,990 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 10:50:41,992 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 10:50:41,992 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 10:50:41,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 10:50:41,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:50:41" (1/1) ... [2023-02-14 10:50:41,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a9560ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:41, skipping insertion in model container [2023-02-14 10:50:41,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:50:41" (1/1) ... [2023-02-14 10:50:42,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 10:50:42,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 10:50:42,096 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2023-02-14 10:50:42,105 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:50:42,115 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 10:50:42,123 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/bitvector-loops/overflow_1-2.c[324,337] [2023-02-14 10:50:42,130 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 10:50:42,139 INFO L208 MainTranslator]: Completed translation [2023-02-14 10:50:42,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42 WrapperNode [2023-02-14 10:50:42,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 10:50:42,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 10:50:42,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 10:50:42,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 10:50:42,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,149 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,159 INFO L138 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 23 [2023-02-14 10:50:42,159 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 10:50:42,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 10:50:42,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 10:50:42,160 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 10:50:42,166 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,166 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,168 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,169 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,172 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,173 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,173 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,174 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 10:50:42,175 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 10:50:42,175 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 10:50:42,175 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 10:50:42,176 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (1/1) ... [2023-02-14 10:50:42,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 10:50:42,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:50:42,203 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) [2023-02-14 10:50:42,208 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 [2023-02-14 10:50:42,229 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 10:50:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 10:50:42,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 10:50:42,230 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 10:50:42,268 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 10:50:42,269 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 10:50:42,329 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 10:50:42,333 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 10:50:42,333 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2023-02-14 10:50:42,334 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:50:42 BoogieIcfgContainer [2023-02-14 10:50:42,334 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 10:50:42,336 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 10:50:42,336 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 10:50:42,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 10:50:42,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:50:41" (1/3) ... [2023-02-14 10:50:42,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0c1926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:50:42, skipping insertion in model container [2023-02-14 10:50:42,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:50:42" (2/3) ... [2023-02-14 10:50:42,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c0c1926 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:50:42, skipping insertion in model container [2023-02-14 10:50:42,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:50:42" (3/3) ... [2023-02-14 10:50:42,340 INFO L112 eAbstractionObserver]: Analyzing ICFG overflow_1-2.c [2023-02-14 10:50:42,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 10:50:42,351 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 10:50:42,378 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 10:50:42,386 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@5264095d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 10:50:42,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 10:50:42,389 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) [2023-02-14 10:50:42,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-02-14 10:50:42,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:50:42,393 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-02-14 10:50:42,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:50:42,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:50:42,397 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2023-02-14 10:50:42,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:50:42,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787912033] [2023-02-14 10:50:42,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:42,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:50:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:42,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:42,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:50:42,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787912033] [2023-02-14 10:50:42,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787912033] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 10:50:42,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 10:50:42,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-14 10:50:42,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633291981] [2023-02-14 10:50:42,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 10:50:42,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-14 10:50:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:50:42,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-14 10:50:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:50:42,599 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 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) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:50:42,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:50:42,623 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2023-02-14 10:50:42,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-14 10:50:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-02-14 10:50:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:50:42,630 INFO L225 Difference]: With dead ends: 20 [2023-02-14 10:50:42,630 INFO L226 Difference]: Without dead ends: 8 [2023-02-14 10:50:42,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-14 10:50:42,634 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:50:42,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:50:42,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2023-02-14 10:50:42,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2023-02-14 10:50:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2023-02-14 10:50:42,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2023-02-14 10:50:42,655 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2023-02-14 10:50:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:50:42,656 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2023-02-14 10:50:42,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:50:42,656 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2023-02-14 10:50:42,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-02-14 10:50:42,656 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:50:42,657 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-02-14 10:50:42,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-14 10:50:42,657 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:50:42,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:50:42,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2023-02-14 10:50:42,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:50:42,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160548842] [2023-02-14 10:50:42,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:42,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:50:42,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:42,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:50:42,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160548842] [2023-02-14 10:50:42,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160548842] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:50:42,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888440186] [2023-02-14 10:50:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:42,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:42,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:50:42,779 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) [2023-02-14 10:50:42,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 10:50:42,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 10:50:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:50:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:42,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:50:42,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:42,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888440186] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:50:42,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:50:42,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-14 10:50:42,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515332822] [2023-02-14 10:50:42,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:50:42,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 10:50:42,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:50:42,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 10:50:42,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-02-14 10:50:42,925 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-02-14 10:50:42,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:50:42,962 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2023-02-14 10:50:42,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 10:50:42,963 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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 7 [2023-02-14 10:50:42,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:50:42,963 INFO L225 Difference]: With dead ends: 15 [2023-02-14 10:50:42,963 INFO L226 Difference]: Without dead ends: 11 [2023-02-14 10:50:42,964 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-02-14 10:50:42,965 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:50:42,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 12 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:50:42,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-14 10:50:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-14 10:50:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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) [2023-02-14 10:50:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2023-02-14 10:50:42,968 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2023-02-14 10:50:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:50:42,968 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2023-02-14 10:50:42,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 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) [2023-02-14 10:50:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2023-02-14 10:50:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-02-14 10:50:42,969 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:50:42,969 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2023-02-14 10:50:42,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 10:50:43,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:43,181 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:50:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:50:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2023-02-14 10:50:43,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:50:43,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79477614] [2023-02-14 10:50:43,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:43,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:50:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:43,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:43,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:50:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79477614] [2023-02-14 10:50:43,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79477614] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:50:43,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315918800] [2023-02-14 10:50:43,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 10:50:43,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:43,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:50:43,342 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) [2023-02-14 10:50:43,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 10:50:43,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 10:50:43,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:50:43,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2023-02-14 10:50:43,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:50:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:43,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:50:43,499 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:43,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315918800] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:50:43,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:50:43,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-14 10:50:43,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208590852] [2023-02-14 10:50:43,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:50:43,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-14 10:50:43,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:50:43,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-14 10:50:43,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-14 10:50:43,503 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-02-14 10:50:43,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:50:43,629 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2023-02-14 10:50:43,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 10:50:43,630 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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 [2023-02-14 10:50:43,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:50:43,631 INFO L225 Difference]: With dead ends: 21 [2023-02-14 10:50:43,631 INFO L226 Difference]: Without dead ends: 17 [2023-02-14 10:50:43,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2023-02-14 10:50:43,632 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 0 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 10:50:43,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 10:50:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-02-14 10:50:43,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-02-14 10:50:43,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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) [2023-02-14 10:50:43,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2023-02-14 10:50:43,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2023-02-14 10:50:43,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:50:43,635 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2023-02-14 10:50:43,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 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) [2023-02-14 10:50:43,636 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2023-02-14 10:50:43,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-14 10:50:43,636 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:50:43,636 INFO L195 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2023-02-14 10:50:43,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 10:50:43,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-02-14 10:50:43,841 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:50:43,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:50:43,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 3 times [2023-02-14 10:50:43,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:50:43,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391878503] [2023-02-14 10:50:43,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:43,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:50:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:44,060 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:44,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:50:44,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391878503] [2023-02-14 10:50:44,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391878503] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:50:44,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897499966] [2023-02-14 10:50:44,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 10:50:44,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:44,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:50:44,066 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) [2023-02-14 10:50:44,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 10:50:44,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-14 10:50:44,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:50:44,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 23 conjunts are in the unsatisfiable core [2023-02-14 10:50:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:50:44,224 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:44,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:50:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:44,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897499966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:50:44,455 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:50:44,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-14 10:50:44,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869100311] [2023-02-14 10:50:44,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:50:44,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-14 10:50:44,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:50:44,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-14 10:50:44,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2023-02-14 10:50:44,456 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:50:45,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:50:45,320 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-02-14 10:50:45,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-14 10:50:45,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-14 10:50:45,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:50:45,321 INFO L225 Difference]: With dead ends: 33 [2023-02-14 10:50:45,321 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 10:50:45,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 10:50:45,322 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 18 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 10:50:45,323 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 10:50:45,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 10:50:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 10:50:45,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 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) [2023-02-14 10:50:45,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2023-02-14 10:50:45,328 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 16 [2023-02-14 10:50:45,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:50:45,328 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2023-02-14 10:50:45,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-14 10:50:45,328 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2023-02-14 10:50:45,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-14 10:50:45,332 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:50:45,333 INFO L195 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1] [2023-02-14 10:50:45,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 10:50:45,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:45,537 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:50:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:50:45,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1394044683, now seen corresponding path program 4 times [2023-02-14 10:50:45,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:50:45,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955893808] [2023-02-14 10:50:45,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:50:45,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:50:45,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:50:45,991 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:45,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:50:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955893808] [2023-02-14 10:50:45,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955893808] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:50:45,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395800796] [2023-02-14 10:50:45,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 10:50:45,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:50:45,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:50:45,993 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) [2023-02-14 10:50:46,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 10:50:46,044 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 10:50:46,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 10:50:46,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 47 conjunts are in the unsatisfiable core [2023-02-14 10:50:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 10:50:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:46,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 10:50:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:50:46,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395800796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 10:50:46,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-14 10:50:46,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2023-02-14 10:50:46,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35969969] [2023-02-14 10:50:46,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-14 10:50:46,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-02-14 10:50:46,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 10:50:46,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-02-14 10:50:46,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=1726, Unknown=0, NotChecked=0, Total=2352 [2023-02-14 10:50:46,867 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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) [2023-02-14 10:51:12,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 10:51:12,959 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2023-02-14 10:51:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-14 10:51:12,967 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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 28 [2023-02-14 10:51:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 10:51:12,968 INFO L225 Difference]: With dead ends: 57 [2023-02-14 10:51:12,968 INFO L226 Difference]: Without dead ends: 53 [2023-02-14 10:51:12,969 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 26.6s TimeCoverageRelationStatistics Valid=1264, Invalid=3848, Unknown=0, NotChecked=0, Total=5112 [2023-02-14 10:51:12,970 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 54 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-14 10:51:12,970 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-14 10:51:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-14 10:51:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-14 10:51:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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) [2023-02-14 10:51:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2023-02-14 10:51:12,986 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 28 [2023-02-14 10:51:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 10:51:12,987 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2023-02-14 10:51:12,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1020408163265305) internal successors, (54), 49 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) [2023-02-14 10:51:12,989 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2023-02-14 10:51:12,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-14 10:51:12,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 10:51:12,990 INFO L195 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1] [2023-02-14 10:51:12,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 10:51:13,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:51:13,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 10:51:13,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 10:51:13,196 INFO L85 PathProgramCache]: Analyzing trace with hash 469964427, now seen corresponding path program 5 times [2023-02-14 10:51:13,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 10:51:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368263592] [2023-02-14 10:51:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 10:51:13,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 10:51:13,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 10:51:14,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 10:51:14,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 10:51:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368263592] [2023-02-14 10:51:14,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368263592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 10:51:14,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069400095] [2023-02-14 10:51:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 10:51:14,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 10:51:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 10:51:14,570 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) [2023-02-14 10:51:14,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process