./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de31.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de31.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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:25:01,169 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:25:01,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:25:01,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:25:01,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:25:01,227 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:25:01,228 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:25:01,229 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:25:01,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:25:01,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:25:01,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:25:01,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:25:01,233 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:25:01,234 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:25:01,235 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:25:01,235 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:25:01,236 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:25:01,237 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:25:01,238 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:25:01,239 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:25:01,240 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:25:01,241 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:25:01,244 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:25:01,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:25:01,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:25:01,247 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:25:01,248 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:25:01,248 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:25:01,249 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:25:01,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:25:01,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:25:01,250 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:25:01,251 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:25:01,252 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:25:01,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:25:01,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:25:01,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:25:01,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:25:01,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:25:01,254 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:25:01,255 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:25:01,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:25:01,257 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:25:01,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:25:01,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:25:01,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:25:01,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:25:01,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:25:01,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:25:01,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:25:01,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:25:01,275 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:25:01,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:25:01,275 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:25:01,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:25:01,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:25:01,276 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:25:01,277 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:25:01,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:25:01,277 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:25:01,277 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:25:01,277 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:25:01,277 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:25:01,278 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:25:01,278 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:25:01,278 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:25:01,278 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:25:01,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:25:01,279 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:25:01,279 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:25:01,279 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:25:01,279 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 [2022-07-22 15:25:01,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:25:01,540 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:25:01,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:25:01,543 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:25:01,543 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:25:01,544 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-07-22 15:25:01,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576d5f6d1/5e9b37bad9dc47288eea28e5a789162f/FLAG6b35dbe1e [2022-07-22 15:25:01,981 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:25:01,982 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c [2022-07-22 15:25:01,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576d5f6d1/5e9b37bad9dc47288eea28e5a789162f/FLAG6b35dbe1e [2022-07-22 15:25:01,995 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/576d5f6d1/5e9b37bad9dc47288eea28e5a789162f [2022-07-22 15:25:01,997 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:25:01,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:25:02,000 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:25:02,000 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:25:02,003 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:25:02,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:25:01" (1/1) ... [2022-07-22 15:25:02,004 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5175abe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02, skipping insertion in model container [2022-07-22 15:25:02,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:25:01" (1/1) ... [2022-07-22 15:25:02,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:25:02,020 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:25:02,123 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-07-22 15:25:02,140 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:25:02,145 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:25:02,155 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2022-07-22 15:25:02,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:25:02,167 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:25:02,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02 WrapperNode [2022-07-22 15:25:02,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:25:02,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:25:02,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:25:02,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:25:02,175 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,181 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,195 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-22 15:25:02,195 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:25:02,196 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:25:02,196 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:25:02,196 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:25:02,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,201 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,202 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,204 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,207 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,208 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:25:02,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:25:02,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:25:02,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:25:02,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (1/1) ... [2022-07-22 15:25:02,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:25:02,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:02,233 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) [2022-07-22 15:25:02,241 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 [2022-07-22 15:25:02,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:25:02,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:25:02,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:25:02,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:25:02,305 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:25:02,307 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:25:02,427 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:25:02,431 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:25:02,433 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-22 15:25:02,434 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:25:02 BoogieIcfgContainer [2022-07-22 15:25:02,435 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:25:02,436 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:25:02,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:25:02,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:25:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:25:01" (1/3) ... [2022-07-22 15:25:02,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747b7e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:25:02, skipping insertion in model container [2022-07-22 15:25:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:25:02" (2/3) ... [2022-07-22 15:25:02,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@747b7e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:25:02, skipping insertion in model container [2022-07-22 15:25:02,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:25:02" (3/3) ... [2022-07-22 15:25:02,442 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de31.c [2022-07-22 15:25:02,451 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:25:02,451 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:25:02,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:25:02,501 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@725f4261, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@64924d66 [2022-07-22 15:25:02,501 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:25:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:25:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-07-22 15:25:02,519 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:02,520 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:02,520 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:02,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:02,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1157484939, now seen corresponding path program 1 times [2022-07-22 15:25:02,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592217313] [2022-07-22 15:25:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:02,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:02,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:02,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:02,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592217313] [2022-07-22 15:25:02,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592217313] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:25:02,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:25:02,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:25:02,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462056547] [2022-07-22 15:25:02,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:25:02,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:25:02,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:02,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:25:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:25:02,893 INFO L87 Difference]: Start difference. First operand has 14 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-07-22 15:25:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:03,021 INFO L93 Difference]: Finished difference Result 35 states and 51 transitions. [2022-07-22 15:25:03,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:25:03,022 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-07-22 15:25:03,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:03,033 INFO L225 Difference]: With dead ends: 35 [2022-07-22 15:25:03,034 INFO L226 Difference]: Without dead ends: 11 [2022-07-22 15:25:03,036 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:25:03,041 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:03,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:25:03,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-22 15:25:03,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-22 15:25:03,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.3) 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) [2022-07-22 15:25:03,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 13 transitions. [2022-07-22 15:25:03,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 13 transitions. Word has length 9 [2022-07-22 15:25:03,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:03,065 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 13 transitions. [2022-07-22 15:25:03,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2022-07-22 15:25:03,065 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 13 transitions. [2022-07-22 15:25:03,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-22 15:25:03,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:03,066 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:03,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:25:03,067 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:03,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:03,067 INFO L85 PathProgramCache]: Analyzing trace with hash 722526704, now seen corresponding path program 1 times [2022-07-22 15:25:03,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:03,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322102832] [2022-07-22 15:25:03,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:03,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:03,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:03,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:03,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322102832] [2022-07-22 15:25:03,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322102832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:03,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404452978] [2022-07-22 15:25:03,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:03,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:03,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:03,192 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) [2022-07-22 15:25:03,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 15:25:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:03,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-22 15:25:03,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:03,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:03,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404452978] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:03,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:03,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-22 15:25:03,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705796014] [2022-07-22 15:25:03,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:03,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 15:25:03,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:03,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 15:25:03,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-22 15:25:03,319 INFO L87 Difference]: Start difference. First operand 11 states and 13 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-07-22 15:25:03,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:03,401 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2022-07-22 15:25:03,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 15:25:03,401 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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 10 [2022-07-22 15:25:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:03,403 INFO L225 Difference]: With dead ends: 37 [2022-07-22 15:25:03,403 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:25:03,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:25:03,404 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:03,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 29 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:25:03,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:25:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2022-07-22 15:25:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 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) [2022-07-22 15:25:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2022-07-22 15:25:03,409 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 10 [2022-07-22 15:25:03,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:03,409 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2022-07-22 15:25:03,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 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) [2022-07-22 15:25:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2022-07-22 15:25:03,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-22 15:25:03,410 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:03,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:03,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-22 15:25:03,623 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 [2022-07-22 15:25:03,624 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:03,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:03,624 INFO L85 PathProgramCache]: Analyzing trace with hash 19581631, now seen corresponding path program 1 times [2022-07-22 15:25:03,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:03,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614170490] [2022-07-22 15:25:03,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:03,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:03,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:03,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614170490] [2022-07-22 15:25:03,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614170490] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639992895] [2022-07-22 15:25:03,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:03,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:03,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:03,892 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 15:25:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:03,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:25:03,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:04,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:04,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:04,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639992895] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:04,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:04,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 19 [2022-07-22 15:25:04,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841189513] [2022-07-22 15:25:04,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:04,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 15:25:04,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:04,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 15:25:04,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2022-07-22 15:25:04,367 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-07-22 15:25:05,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:05,450 INFO L93 Difference]: Finished difference Result 59 states and 71 transitions. [2022-07-22 15:25:05,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 15:25:05,451 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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 12 [2022-07-22 15:25:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:05,452 INFO L225 Difference]: With dead ends: 59 [2022-07-22 15:25:05,452 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 15:25:05,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=1130, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 15:25:05,453 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:05,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 38 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:25:05,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 15:25:05,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 20. [2022-07-22 15:25:05,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 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) [2022-07-22 15:25:05,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2022-07-22 15:25:05,459 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 12 [2022-07-22 15:25:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:05,459 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2022-07-22 15:25:05,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 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) [2022-07-22 15:25:05,461 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2022-07-22 15:25:05,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 15:25:05,462 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:05,462 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:05,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:05,681 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 [2022-07-22 15:25:05,681 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:05,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1563380427, now seen corresponding path program 2 times [2022-07-22 15:25:05,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:05,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454403997] [2022-07-22 15:25:05,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:05,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:05,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:05,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454403997] [2022-07-22 15:25:05,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454403997] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:05,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115306934] [2022-07-22 15:25:05,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:25:05,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:05,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:05,763 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) [2022-07-22 15:25:05,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 15:25:05,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:25:05,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:05,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-22 15:25:05,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:05,827 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:05,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:05,888 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:05,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115306934] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:05,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:05,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-22 15:25:05,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378771270] [2022-07-22 15:25:05,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:05,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-22 15:25:05,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:05,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-22 15:25:05,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-22 15:25:05,893 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2022-07-22 15:25:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:06,373 INFO L93 Difference]: Finished difference Result 75 states and 115 transitions. [2022-07-22 15:25:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 15:25:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) Word has length 13 [2022-07-22 15:25:06,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:06,374 INFO L225 Difference]: With dead ends: 75 [2022-07-22 15:25:06,375 INFO L226 Difference]: Without dead ends: 70 [2022-07-22 15:25:06,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2022-07-22 15:25:06,376 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 138 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:06,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 69 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:25:06,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-07-22 15:25:06,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 39. [2022-07-22 15:25:06,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 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) [2022-07-22 15:25:06,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-07-22 15:25:06,400 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 13 [2022-07-22 15:25:06,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:06,400 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-07-22 15:25:06,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 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) [2022-07-22 15:25:06,402 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-07-22 15:25:06,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-22 15:25:06,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:06,404 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:06,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:06,605 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 [2022-07-22 15:25:06,605 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:06,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1098222449, now seen corresponding path program 2 times [2022-07-22 15:25:06,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:06,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577288356] [2022-07-22 15:25:06,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:06,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:06,668 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:25:06,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577288356] [2022-07-22 15:25:06,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577288356] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:06,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801534557] [2022-07-22 15:25:06,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:25:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:06,670 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) [2022-07-22 15:25:06,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 15:25:06,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:25:06,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:06,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 15:25:06,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:25:06,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:06,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:25:06,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801534557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:06,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:06,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-07-22 15:25:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527187651] [2022-07-22 15:25:06,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 15:25:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:06,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 15:25:06,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-22 15:25:06,781 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-07-22 15:25:06,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:06,936 INFO L93 Difference]: Finished difference Result 72 states and 94 transitions. [2022-07-22 15:25:06,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 15:25:06,936 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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 14 [2022-07-22 15:25:06,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:06,937 INFO L225 Difference]: With dead ends: 72 [2022-07-22 15:25:06,937 INFO L226 Difference]: Without dead ends: 62 [2022-07-22 15:25:06,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-22 15:25:06,938 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:06,938 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:25:06,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-07-22 15:25:06,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2022-07-22 15:25:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:25:06,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 64 transitions. [2022-07-22 15:25:06,952 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 64 transitions. Word has length 14 [2022-07-22 15:25:06,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:06,952 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 64 transitions. [2022-07-22 15:25:06,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 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) [2022-07-22 15:25:06,952 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2022-07-22 15:25:06,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:25:06,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:06,953 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:06,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:07,153 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 [2022-07-22 15:25:07,154 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:07,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:07,154 INFO L85 PathProgramCache]: Analyzing trace with hash 854515253, now seen corresponding path program 3 times [2022-07-22 15:25:07,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:07,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399963659] [2022-07-22 15:25:07,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:07,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:07,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:07,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399963659] [2022-07-22 15:25:07,413 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399963659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:07,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555464961] [2022-07-22 15:25:07,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:25:07,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:07,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:07,427 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) [2022-07-22 15:25:07,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 15:25:07,456 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 15:25:07,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:07,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 15:25:07,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:07,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:07,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:08,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:08,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555464961] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:08,090 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:08,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 27 [2022-07-22 15:25:08,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939966431] [2022-07-22 15:25:08,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:08,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 15:25:08,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:08,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 15:25:08,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=599, Unknown=0, NotChecked=0, Total=702 [2022-07-22 15:25:08,092 INFO L87 Difference]: Start difference. First operand 46 states and 64 transitions. Second operand has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-07-22 15:25:08,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:08,828 INFO L93 Difference]: Finished difference Result 97 states and 120 transitions. [2022-07-22 15:25:08,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 15:25:08,829 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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 15 [2022-07-22 15:25:08,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:08,829 INFO L225 Difference]: With dead ends: 97 [2022-07-22 15:25:08,829 INFO L226 Difference]: Without dead ends: 73 [2022-07-22 15:25:08,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 15:25:08,830 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:08,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 110 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:25:08,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-22 15:25:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 46. [2022-07-22 15:25:08,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 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) [2022-07-22 15:25:08,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 63 transitions. [2022-07-22 15:25:08,839 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 63 transitions. Word has length 15 [2022-07-22 15:25:08,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:08,840 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 63 transitions. [2022-07-22 15:25:08,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 27 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) [2022-07-22 15:25:08,840 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 63 transitions. [2022-07-22 15:25:08,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 15:25:08,840 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:08,840 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:08,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:09,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:09,046 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:09,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:09,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1966551549, now seen corresponding path program 4 times [2022-07-22 15:25:09,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:09,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627526794] [2022-07-22 15:25:09,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:09,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:09,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 15:25:09,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:09,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627526794] [2022-07-22 15:25:09,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627526794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:09,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277164263] [2022-07-22 15:25:09,106 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:25:09,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:09,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:09,108 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) [2022-07-22 15:25:09,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 15:25:09,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:25:09,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:09,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 15:25:09,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 15:25:09,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:09,295 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 15:25:09,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277164263] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:09,295 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:09,295 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-22 15:25:09,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549951414] [2022-07-22 15:25:09,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:09,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 15:25:09,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:09,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 15:25:09,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-22 15:25:09,296 INFO L87 Difference]: Start difference. First operand 46 states and 63 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-07-22 15:25:09,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:09,534 INFO L93 Difference]: Finished difference Result 84 states and 110 transitions. [2022-07-22 15:25:09,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 15:25:09,534 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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 17 [2022-07-22 15:25:09,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:09,535 INFO L225 Difference]: With dead ends: 84 [2022-07-22 15:25:09,535 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 15:25:09,535 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2022-07-22 15:25:09,536 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:09,536 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 92 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:25:09,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 15:25:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2022-07-22 15:25:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 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) [2022-07-22 15:25:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-07-22 15:25:09,547 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 17 [2022-07-22 15:25:09,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:09,547 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-07-22 15:25:09,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 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) [2022-07-22 15:25:09,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-07-22 15:25:09,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-22 15:25:09,548 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:09,548 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:09,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:09,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:09,773 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:09,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:09,774 INFO L85 PathProgramCache]: Analyzing trace with hash -73381852, now seen corresponding path program 5 times [2022-07-22 15:25:09,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:09,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718132575] [2022-07-22 15:25:09,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:09,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:09,849 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:25:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718132575] [2022-07-22 15:25:09,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718132575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:09,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559881214] [2022-07-22 15:25:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:25:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:09,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:09,864 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:09,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 15:25:09,900 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 15:25:09,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:09,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-22 15:25:09,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:25:09,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:25:10,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559881214] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:10,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:10,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-22 15:25:10,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461960476] [2022-07-22 15:25:10,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:10,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 15:25:10,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:10,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 15:25:10,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-07-22 15:25:10,094 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2022-07-22 15:25:14,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:14,076 INFO L93 Difference]: Finished difference Result 154 states and 221 transitions. [2022-07-22 15:25:14,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 15:25:14,077 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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 17 [2022-07-22 15:25:14,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:14,079 INFO L225 Difference]: With dead ends: 154 [2022-07-22 15:25:14,079 INFO L226 Difference]: Without dead ends: 145 [2022-07-22 15:25:14,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1699 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1418, Invalid=3838, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 15:25:14,081 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 268 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 305 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 305 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:14,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 110 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [305 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 15:25:14,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-07-22 15:25:14,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 71. [2022-07-22 15:25:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:25:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-07-22 15:25:14,110 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 17 [2022-07-22 15:25:14,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:14,111 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-07-22 15:25:14,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 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) [2022-07-22 15:25:14,112 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-07-22 15:25:14,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-22 15:25:14,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:14,116 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:14,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 15:25:14,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:14,331 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:14,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:14,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1333529985, now seen corresponding path program 6 times [2022-07-22 15:25:14,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:14,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934176701] [2022-07-22 15:25:14,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:14,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:14,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:14,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934176701] [2022-07-22 15:25:14,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934176701] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:14,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167433946] [2022-07-22 15:25:14,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:25:14,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:14,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:14,644 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:14,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 15:25:14,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-22 15:25:14,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:14,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 15:25:14,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:14,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:14,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:15,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:15,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167433946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:15,400 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:15,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 12] total 34 [2022-07-22 15:25:15,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185130233] [2022-07-22 15:25:15,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:15,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 15:25:15,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:15,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 15:25:15,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 15:25:15,402 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-07-22 15:25:17,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:17,081 INFO L93 Difference]: Finished difference Result 126 states and 159 transitions. [2022-07-22 15:25:17,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 15:25:17,082 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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 18 [2022-07-22 15:25:17,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:17,083 INFO L225 Difference]: With dead ends: 126 [2022-07-22 15:25:17,083 INFO L226 Difference]: Without dead ends: 99 [2022-07-22 15:25:17,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=361, Invalid=2501, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 15:25:17,086 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:17,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 168 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 15:25:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-07-22 15:25:17,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2022-07-22 15:25:17,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 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) [2022-07-22 15:25:17,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 95 transitions. [2022-07-22 15:25:17,105 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 95 transitions. Word has length 18 [2022-07-22 15:25:17,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:17,123 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 95 transitions. [2022-07-22 15:25:17,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.411764705882353) internal successors, (48), 34 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) [2022-07-22 15:25:17,123 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 95 transitions. [2022-07-22 15:25:17,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 15:25:17,124 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:17,124 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:17,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:17,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-07-22 15:25:17,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:17,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:17,341 INFO L85 PathProgramCache]: Analyzing trace with hash 159423631, now seen corresponding path program 7 times [2022-07-22 15:25:17,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:17,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427384285] [2022-07-22 15:25:17,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:17,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 15:25:17,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427384285] [2022-07-22 15:25:17,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427384285] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:17,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708006568] [2022-07-22 15:25:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:25:17,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:17,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:17,440 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:17,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 15:25:17,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:17,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 15:25:17,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:17,541 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 15:25:17,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-22 15:25:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708006568] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:17,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:17,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2022-07-22 15:25:17,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387780872] [2022-07-22 15:25:17,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:17,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 15:25:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 15:25:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-07-22 15:25:17,653 INFO L87 Difference]: Start difference. First operand 70 states and 95 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2022-07-22 15:25:17,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:17,993 INFO L93 Difference]: Finished difference Result 119 states and 158 transitions. [2022-07-22 15:25:17,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 15:25:17,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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 20 [2022-07-22 15:25:17,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:17,994 INFO L225 Difference]: With dead ends: 119 [2022-07-22 15:25:17,994 INFO L226 Difference]: Without dead ends: 101 [2022-07-22 15:25:17,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-07-22 15:25:17,995 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 31 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:17,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 15:25:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-22 15:25:18,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 77. [2022-07-22 15:25:18,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 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) [2022-07-22 15:25:18,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 105 transitions. [2022-07-22 15:25:18,020 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 105 transitions. Word has length 20 [2022-07-22 15:25:18,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:18,021 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 105 transitions. [2022-07-22 15:25:18,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 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) [2022-07-22 15:25:18,021 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 105 transitions. [2022-07-22 15:25:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-22 15:25:18,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:18,021 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:18,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:18,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 15:25:18,236 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:18,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:18,236 INFO L85 PathProgramCache]: Analyzing trace with hash -2017092107, now seen corresponding path program 8 times [2022-07-22 15:25:18,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:18,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905248383] [2022-07-22 15:25:18,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:18,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:18,563 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905248383] [2022-07-22 15:25:18,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905248383] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:18,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633812966] [2022-07-22 15:25:18,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:25:18,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:18,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:18,584 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:18,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 15:25:18,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:25:18,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:18,664 WARN L261 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 15:25:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:19,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:19,027 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633812966] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:19,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18, 14] total 41 [2022-07-22 15:25:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741475317] [2022-07-22 15:25:19,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:19,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 15:25:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:19,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 15:25:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 15:25:19,552 INFO L87 Difference]: Start difference. First operand 77 states and 105 transitions. Second operand has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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) [2022-07-22 15:25:24,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:24,842 INFO L93 Difference]: Finished difference Result 143 states and 178 transitions. [2022-07-22 15:25:24,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 15:25:24,843 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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 [2022-07-22 15:25:24,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:24,843 INFO L225 Difference]: With dead ends: 143 [2022-07-22 15:25:24,843 INFO L226 Difference]: Without dead ends: 109 [2022-07-22 15:25:24,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1139 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=483, Invalid=3677, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 15:25:24,845 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:24,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 190 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 695 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 15:25:24,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-22 15:25:24,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2022-07-22 15:25:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:25:24,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 98 transitions. [2022-07-22 15:25:24,858 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 98 transitions. Word has length 21 [2022-07-22 15:25:24,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:24,858 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 98 transitions. [2022-07-22 15:25:24,858 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.3902439024390243) internal successors, (57), 41 states have internal predecessors, (57), 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) [2022-07-22 15:25:24,859 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 98 transitions. [2022-07-22 15:25:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 15:25:24,859 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:24,860 INFO L195 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:24,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-22 15:25:25,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 15:25:25,078 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:25,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:25,078 INFO L85 PathProgramCache]: Analyzing trace with hash 2027051824, now seen corresponding path program 9 times [2022-07-22 15:25:25,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:25,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747526797] [2022-07-22 15:25:25,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:25,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:25,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:25:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:25,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747526797] [2022-07-22 15:25:25,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747526797] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:25,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466607618] [2022-07-22 15:25:25,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:25:25,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:25,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:25,196 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:25,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 15:25:25,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 15:25:25,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:25,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 15:25:25,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:25,318 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 15:25:25,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-22 15:25:25,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466607618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:25,399 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:25,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2022-07-22 15:25:25,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103382067] [2022-07-22 15:25:25,399 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:25,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 15:25:25,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:25,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 15:25:25,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2022-07-22 15:25:25,400 INFO L87 Difference]: Start difference. First operand 71 states and 98 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-07-22 15:25:26,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:25:26,009 INFO L93 Difference]: Finished difference Result 128 states and 170 transitions. [2022-07-22 15:25:26,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 15:25:26,010 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-22 15:25:26,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:25:26,010 INFO L225 Difference]: With dead ends: 128 [2022-07-22 15:25:26,010 INFO L226 Difference]: Without dead ends: 115 [2022-07-22 15:25:26,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 15:25:26,011 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:25:26,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 140 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:25:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-07-22 15:25:26,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 78. [2022-07-22 15:25:26,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 77 states have internal predecessors, (100), 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) [2022-07-22 15:25:26,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2022-07-22 15:25:26,031 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 22 [2022-07-22 15:25:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:25:26,032 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2022-07-22 15:25:26,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 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) [2022-07-22 15:25:26,032 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2022-07-22 15:25:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 15:25:26,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:25:26,033 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:25:26,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 15:25:26,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 15:25:26,250 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:25:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:25:26,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1622674000, now seen corresponding path program 3 times [2022-07-22 15:25:26,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:25:26,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928546040] [2022-07-22 15:25:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:25:26,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:25:26,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:25:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:26,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:25:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928546040] [2022-07-22 15:25:26,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928546040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:25:26,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506755732] [2022-07-22 15:25:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:25:26,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:25:26,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:25:26,425 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:25:26,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 15:25:26,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 15:25:26,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:25:26,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 15:25:26,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:25:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:26,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:25:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:25:26,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506755732] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:25:26,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:25:26,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-22 15:25:26,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382731647] [2022-07-22 15:25:26,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:25:26,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 15:25:26,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:25:26,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 15:25:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 15:25:26,912 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand has 33 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) [2022-07-22 15:26:25,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:26:25,556 INFO L93 Difference]: Finished difference Result 396 states and 538 transitions. [2022-07-22 15:26:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 15:26:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 33 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) Word has length 22 [2022-07-22 15:26:25,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:26:25,557 INFO L225 Difference]: With dead ends: 396 [2022-07-22 15:26:25,557 INFO L226 Difference]: Without dead ends: 369 [2022-07-22 15:26:25,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 57.4s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 15:26:25,559 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 878 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 15:26:25,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 347 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 15:26:25,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-07-22 15:26:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 117. [2022-07-22 15:26:25,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 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) [2022-07-22 15:26:25,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 156 transitions. [2022-07-22 15:26:25,580 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 156 transitions. Word has length 22 [2022-07-22 15:26:25,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:26:25,581 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 156 transitions. [2022-07-22 15:26:25,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 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) [2022-07-22 15:26:25,581 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 156 transitions. [2022-07-22 15:26:25,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-22 15:26:25,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:26:25,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:26:25,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 15:26:25,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 15:26:25,796 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:26:25,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:26:25,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1589406077, now seen corresponding path program 10 times [2022-07-22 15:26:25,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:26:25,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388487443] [2022-07-22 15:26:25,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:26:25,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:26:25,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:25,930 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:26:25,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:26:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388487443] [2022-07-22 15:26:25,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388487443] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:26:25,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358332987] [2022-07-22 15:26:25,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 15:26:25,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:25,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:26:25,948 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:26:25,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 15:26:25,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 15:26:25,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:26:25,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 15:26:25,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:26:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:26:26,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:26:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-22 15:26:26,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358332987] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:26:26,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:26:26,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2022-07-22 15:26:26,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335338037] [2022-07-22 15:26:26,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:26:26,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 15:26:26,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:26:26,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 15:26:26,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-07-22 15:26:26,340 INFO L87 Difference]: Start difference. First operand 117 states and 156 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-07-22 15:26:27,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:26:27,023 INFO L93 Difference]: Finished difference Result 209 states and 262 transitions. [2022-07-22 15:26:27,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 15:26:27,024 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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 23 [2022-07-22 15:26:27,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:26:27,025 INFO L225 Difference]: With dead ends: 209 [2022-07-22 15:26:27,025 INFO L226 Difference]: Without dead ends: 160 [2022-07-22 15:26:27,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=996, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 15:26:27,030 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:26:27,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 86 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 15:26:27,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-07-22 15:26:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 131. [2022-07-22 15:26:27,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.323076923076923) internal successors, (172), 130 states have internal predecessors, (172), 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) [2022-07-22 15:26:27,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-07-22 15:26:27,062 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 23 [2022-07-22 15:26:27,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:26:27,063 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-07-22 15:26:27,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 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) [2022-07-22 15:26:27,063 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-07-22 15:26:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-22 15:26:27,065 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:26:27,065 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:26:27,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-07-22 15:26:27,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-22 15:26:27,272 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:26:27,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:26:27,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1230457407, now seen corresponding path program 11 times [2022-07-22 15:26:27,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:26:27,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793794667] [2022-07-22 15:26:27,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:26:27,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:26:27,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:26:27,806 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:26:27,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:26:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793794667] [2022-07-22 15:26:27,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793794667] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:26:27,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131128953] [2022-07-22 15:26:27,806 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 15:26:27,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:26:27,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:26:27,808 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:26:27,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 15:26:27,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-22 15:26:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:26:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 15:26:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:26:32,543 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:26:32,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:26:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:26:36,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131128953] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:26:36,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:26:36,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 43 [2022-07-22 15:26:36,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462468038] [2022-07-22 15:26:36,061 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:26:36,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-22 15:26:36,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:26:36,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-22 15:26:36,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1612, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 15:26:36,063 INFO L87 Difference]: Start difference. First operand 131 states and 172 transitions. Second operand has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 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) [2022-07-22 15:27:01,431 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:27:05,260 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-07-22 15:27:16,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:27:16,670 INFO L93 Difference]: Finished difference Result 207 states and 252 transitions. [2022-07-22 15:27:16,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 15:27:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 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 24 [2022-07-22 15:27:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:27:16,672 INFO L225 Difference]: With dead ends: 207 [2022-07-22 15:27:16,672 INFO L226 Difference]: Without dead ends: 177 [2022-07-22 15:27:16,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1060 ImplicationChecksByTransitivity, 35.5s TimeCoverageRelationStatistics Valid=504, Invalid=3918, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 15:27:16,673 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.8s IncrementalHoareTripleChecker+Time [2022-07-22 15:27:16,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 120 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 12.8s Time] [2022-07-22 15:27:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-07-22 15:27:16,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 119. [2022-07-22 15:27:16,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 118 states have internal predecessors, (157), 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) [2022-07-22 15:27:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 157 transitions. [2022-07-22 15:27:16,709 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 157 transitions. Word has length 24 [2022-07-22 15:27:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:27:16,711 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 157 transitions. [2022-07-22 15:27:16,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.5116279069767442) internal successors, (65), 43 states have internal predecessors, (65), 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) [2022-07-22 15:27:16,712 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 157 transitions. [2022-07-22 15:27:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-22 15:27:16,712 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:27:16,712 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:27:16,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 15:27:16,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:27:16,917 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:27:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:27:16,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1431729572, now seen corresponding path program 12 times [2022-07-22 15:27:16,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:27:16,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436136385] [2022-07-22 15:27:16,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:27:16,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:27:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:27:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:27:17,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:27:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436136385] [2022-07-22 15:27:17,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436136385] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:27:17,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919469479] [2022-07-22 15:27:17,118 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 15:27:17,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:27:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:27:17,119 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:27:17,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 15:27:17,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 15:27:17,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:27:17,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 15:27:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:27:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:27:17,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:27:17,739 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 15:27:17,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919469479] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:27:17,739 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:27:17,739 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 34 [2022-07-22 15:27:17,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105780144] [2022-07-22 15:27:17,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:27:17,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-22 15:27:17,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:27:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-22 15:27:17,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2022-07-22 15:27:17,740 INFO L87 Difference]: Start difference. First operand 119 states and 157 transitions. Second operand has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 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) [2022-07-22 15:27:26,589 WARN L233 SmtUtils]: Spent 5.95s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:27:37,169 WARN L233 SmtUtils]: Spent 5.57s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:28:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:46,763 INFO L93 Difference]: Finished difference Result 476 states and 621 transitions. [2022-07-22 15:28:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-07-22 15:28:46,764 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 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 [2022-07-22 15:28:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:46,765 INFO L225 Difference]: With dead ends: 476 [2022-07-22 15:28:46,765 INFO L226 Difference]: Without dead ends: 429 [2022-07-22 15:28:46,767 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 86.6s TimeCoverageRelationStatistics Valid=1928, Invalid=3924, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 15:28:46,768 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 936 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:46,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [936 Valid, 479 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 15:28:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2022-07-22 15:28:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 134. [2022-07-22 15:28:46,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.330827067669173) internal successors, (177), 133 states have internal predecessors, (177), 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) [2022-07-22 15:28:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 177 transitions. [2022-07-22 15:28:46,812 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 177 transitions. Word has length 25 [2022-07-22 15:28:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:46,812 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 177 transitions. [2022-07-22 15:28:46,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.5) internal successors, (51), 34 states have internal predecessors, (51), 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) [2022-07-22 15:28:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 177 transitions. [2022-07-22 15:28:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 15:28:46,813 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:46,813 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:46,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 15:28:47,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-22 15:28:47,018 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:47,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:47,019 INFO L85 PathProgramCache]: Analyzing trace with hash -40778609, now seen corresponding path program 13 times [2022-07-22 15:28:47,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:47,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436667077] [2022-07-22 15:28:47,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:47,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:47,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:28:47,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436667077] [2022-07-22 15:28:47,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436667077] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:47,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873114662] [2022-07-22 15:28:47,172 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 15:28:47,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:47,184 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:28:47,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 15:28:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:47,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 15:28:47,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:28:47,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:47,589 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-22 15:28:47,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873114662] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:47,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:47,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2022-07-22 15:28:47,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602000216] [2022-07-22 15:28:47,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:47,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 15:28:47,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:47,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 15:28:47,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 15:28:47,590 INFO L87 Difference]: Start difference. First operand 134 states and 177 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:48,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:28:48,846 INFO L93 Difference]: Finished difference Result 244 states and 304 transitions. [2022-07-22 15:28:48,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 15:28:48,846 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 15:28:48,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:28:48,847 INFO L225 Difference]: With dead ends: 244 [2022-07-22 15:28:48,847 INFO L226 Difference]: Without dead ends: 182 [2022-07-22 15:28:48,849 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 15:28:48,850 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 41 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 15:28:48,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 78 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 15:28:48,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-07-22 15:28:48,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 150. [2022-07-22 15:28:48,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.308724832214765) internal successors, (195), 149 states have internal predecessors, (195), 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) [2022-07-22 15:28:48,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 195 transitions. [2022-07-22 15:28:48,889 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 195 transitions. Word has length 26 [2022-07-22 15:28:48,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:28:48,889 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 195 transitions. [2022-07-22 15:28:48,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:28:48,889 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 195 transitions. [2022-07-22 15:28:48,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 15:28:48,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:28:48,890 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:28:48,906 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 15:28:49,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 15:28:49,107 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:28:49,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:28:49,107 INFO L85 PathProgramCache]: Analyzing trace with hash 881225141, now seen corresponding path program 14 times [2022-07-22 15:28:49,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:28:49,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244221176] [2022-07-22 15:28:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:28:49,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:28:49,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:28:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:49,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:28:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244221176] [2022-07-22 15:28:49,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244221176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:28:49,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716531323] [2022-07-22 15:28:49,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 15:28:49,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:28:49,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:28:49,665 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:28:49,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 15:28:49,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 15:28:49,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:28:49,904 WARN L261 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 15:28:49,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:28:50,543 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:50,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:28:51,681 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:28:51,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716531323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:28:51,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:28:51,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 24, 18] total 55 [2022-07-22 15:28:51,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825990671] [2022-07-22 15:28:51,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:28:51,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-22 15:28:51,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:28:51,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-22 15:28:51,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=2667, Unknown=0, NotChecked=0, Total=2970 [2022-07-22 15:28:51,684 INFO L87 Difference]: Start difference. First operand 150 states and 195 transitions. Second operand has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 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) [2022-07-22 15:29:09,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:29:09,621 INFO L93 Difference]: Finished difference Result 245 states and 295 transitions. [2022-07-22 15:29:09,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 15:29:09,622 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 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 27 [2022-07-22 15:29:09,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:29:09,623 INFO L225 Difference]: With dead ends: 245 [2022-07-22 15:29:09,632 INFO L226 Difference]: Without dead ends: 211 [2022-07-22 15:29:09,639 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1844 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=743, Invalid=5899, Unknown=0, NotChecked=0, Total=6642 [2022-07-22 15:29:09,639 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 94 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-22 15:29:09,640 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 200 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-22 15:29:09,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-07-22 15:29:09,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 136. [2022-07-22 15:29:09,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.3185185185185184) internal successors, (178), 135 states have internal predecessors, (178), 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) [2022-07-22 15:29:09,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2022-07-22 15:29:09,680 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 27 [2022-07-22 15:29:09,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:29:09,680 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2022-07-22 15:29:09,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.3636363636363635) internal successors, (75), 55 states have internal predecessors, (75), 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) [2022-07-22 15:29:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2022-07-22 15:29:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-22 15:29:09,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:29:09,681 INFO L195 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:29:09,687 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-22 15:29:09,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 15:29:09,885 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:29:09,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:29:09,886 INFO L85 PathProgramCache]: Analyzing trace with hash 949161264, now seen corresponding path program 15 times [2022-07-22 15:29:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:29:09,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498838821] [2022-07-22 15:29:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:29:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:29:09,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:29:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:29:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:29:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498838821] [2022-07-22 15:29:10,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498838821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 15:29:10,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331639986] [2022-07-22 15:29:10,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 15:29:10,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 15:29:10,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:29:10,116 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 15:29:10,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 15:29:10,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 15:29:10,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 15:29:10,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 15:29:10,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 15:29:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:29:10,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 15:29:10,895 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-22 15:29:10,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331639986] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 15:29:10,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 15:29:10,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 37 [2022-07-22 15:29:10,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917525739] [2022-07-22 15:29:10,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 15:29:10,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 15:29:10,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:29:10,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 15:29:10,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1006, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 15:29:10,899 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 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) [2022-07-22 15:29:25,182 WARN L233 SmtUtils]: Spent 5.96s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:29:40,079 WARN L233 SmtUtils]: Spent 8.89s on a formula simplification that was a NOOP. DAG size: 62 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-22 15:29:48,180 WARN L233 SmtUtils]: Spent 5.49s on a formula simplification that was a NOOP. DAG size: 58 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)