./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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-de51.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 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:12:30,168 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:12:30,170 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:12:30,195 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:12:30,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:12:30,199 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:12:30,203 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:12:30,206 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:12:30,207 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:12:30,211 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:12:30,212 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:12:30,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:12:30,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:12:30,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:12:30,218 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:12:30,219 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:12:30,220 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:12:30,221 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:12:30,224 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:12:30,229 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:12:30,231 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:12:30,232 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:12:30,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:12:30,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:12:30,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:12:30,235 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:12:30,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:12:30,236 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:12:30,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:12:30,237 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:12:30,239 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:12:30,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:12:30,241 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:12:30,242 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:12:30,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:12:30,243 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:12:30,244 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:12:30,244 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:12:30,244 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:12:30,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:12:30,246 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:12:30,247 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:12:30,248 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:12:30,272 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:12:30,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:12:30,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:12:30,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:12:30,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:12:30,274 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:12:30,275 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:12:30,275 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:12:30,275 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:12:30,276 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:12:30,276 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:12:30,276 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:12:30,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:12:30,277 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:12:30,277 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:12:30,277 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:12:30,277 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:12:30,277 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:12:30,278 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:12:30,278 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:12:30,278 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:12:30,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:12:30,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:12:30,279 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:12:30,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:12:30,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:12:30,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:12:30,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:12:30,280 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:12:30,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:12:30,280 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:12:30,280 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:12:30,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:12:30,281 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6b650e50691cb35e1bdf008faa87d25716bf83c58902e8bffb444ab81952ff19 [2022-07-19 15:12:30,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:12:30,526 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:12:30,528 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:12:30,529 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:12:30,529 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:12:30,530 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-07-19 15:12:30,585 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0708dd72e/264b99f0b7d34ce8b4b289874cd99991/FLAGd4991c25c [2022-07-19 15:12:30,986 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:12:30,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de51.c [2022-07-19 15:12:30,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0708dd72e/264b99f0b7d34ce8b4b289874cd99991/FLAGd4991c25c [2022-07-19 15:12:31,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0708dd72e/264b99f0b7d34ce8b4b289874cd99991 [2022-07-19 15:12:31,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:12:31,412 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:12:31,429 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:12:31,429 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:12:31,432 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:12:31,433 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@525b2403 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31, skipping insertion in model container [2022-07-19 15:12:31,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:12:31,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:12:31,579 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-de51.c[368,381] [2022-07-19 15:12:31,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:12:31,598 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:12:31,608 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-de51.c[368,381] [2022-07-19 15:12:31,612 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:12:31,622 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:12:31,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31 WrapperNode [2022-07-19 15:12:31,623 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:12:31,624 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:12:31,624 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:12:31,624 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:12:31,630 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,635 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,650 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 75 [2022-07-19 15:12:31,650 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:12:31,651 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:12:31,651 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:12:31,651 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:12:31,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,657 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,658 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,659 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,661 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:12:31,668 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:12:31,668 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:12:31,668 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:12:31,669 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (1/1) ... [2022-07-19 15:12:31,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:12:31,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:31,696 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) [2022-07-19 15:12:31,717 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 [2022-07-19 15:12:31,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:12:31,740 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:12:31,740 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:12:31,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:12:31,789 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:12:31,790 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:12:31,938 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:12:31,943 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:12:31,947 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-07-19 15:12:31,953 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:12:31 BoogieIcfgContainer [2022-07-19 15:12:31,953 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:12:31,955 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:12:31,955 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:12:31,961 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:12:31,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:12:31" (1/3) ... [2022-07-19 15:12:31,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bf1845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:12:31, skipping insertion in model container [2022-07-19 15:12:31,962 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:12:31" (2/3) ... [2022-07-19 15:12:31,962 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24bf1845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:12:31, skipping insertion in model container [2022-07-19 15:12:31,963 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:12:31" (3/3) ... [2022-07-19 15:12:31,964 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de51.c [2022-07-19 15:12:31,975 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:12:31,975 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:12:32,024 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:12:32,043 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@110e19fa, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6bf11670 [2022-07-19 15:12:32,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:12:32,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) [2022-07-19 15:12:32,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:12:32,066 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,067 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,079 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2022-07-19 15:12:32,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961411977] [2022-07-19 15:12:32,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961411977] [2022-07-19 15:12:32,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961411977] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:12:32,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:12:32,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 15:12:32,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481485646] [2022-07-19 15:12:32,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:12:32,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-19 15:12:32,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:32,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-19 15:12:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:12:32,261 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 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) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:32,274 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2022-07-19 15:12:32,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-19 15:12:32,276 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 15:12:32,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:32,282 INFO L225 Difference]: With dead ends: 29 [2022-07-19 15:12:32,282 INFO L226 Difference]: Without dead ends: 12 [2022-07-19 15:12:32,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-19 15:12:32,297 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:32,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:32,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2022-07-19 15:12:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2022-07-19 15:12:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2022-07-19 15:12:32,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2022-07-19 15:12:32,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:32,327 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2022-07-19 15:12:32,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,328 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2022-07-19 15:12:32,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-19 15:12:32,328 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,329 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:12:32,329 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,332 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2022-07-19 15:12:32,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214101161] [2022-07-19 15:12:32,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214101161] [2022-07-19 15:12:32,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214101161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:12:32,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:12:32,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:12:32,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864829374] [2022-07-19 15:12:32,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:12:32,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:12:32,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:32,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:12:32,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:12:32,500 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:32,537 INFO L93 Difference]: Finished difference Result 22 states and 30 transitions. [2022-07-19 15:12:32,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:12:32,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-19 15:12:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:32,540 INFO L225 Difference]: With dead ends: 22 [2022-07-19 15:12:32,540 INFO L226 Difference]: Without dead ends: 18 [2022-07-19 15:12:32,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:12:32,544 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 2 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:32,545 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 25 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:32,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-19 15:12:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-19 15:12:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 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) [2022-07-19 15:12:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 26 transitions. [2022-07-19 15:12:32,554 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 26 transitions. Word has length 11 [2022-07-19 15:12:32,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:32,555 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 26 transitions. [2022-07-19 15:12:32,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,555 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 26 transitions. [2022-07-19 15:12:32,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 15:12:32,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,556 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:12:32,556 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2022-07-19 15:12:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256790371] [2022-07-19 15:12:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256790371] [2022-07-19 15:12:32,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256790371] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:12:32,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:12:32,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:12:32,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571037066] [2022-07-19 15:12:32,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:12:32,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:12:32,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:32,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:12:32,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:12:32,589 INFO L87 Difference]: Start difference. First operand 18 states and 26 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:32,607 INFO L93 Difference]: Finished difference Result 29 states and 42 transitions. [2022-07-19 15:12:32,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:12:32,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 15:12:32,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:32,608 INFO L225 Difference]: With dead ends: 29 [2022-07-19 15:12:32,618 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 15:12:32,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:12:32,619 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 5 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:32,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 20 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 15:12:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 15:12:32,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 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) [2022-07-19 15:12:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 34 transitions. [2022-07-19 15:12:32,628 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 34 transitions. Word has length 12 [2022-07-19 15:12:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:32,629 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 34 transitions. [2022-07-19 15:12:32,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 34 transitions. [2022-07-19 15:12:32,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 15:12:32,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,631 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 15:12:32,631 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2022-07-19 15:12:32,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367793712] [2022-07-19 15:12:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367793712] [2022-07-19 15:12:32,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367793712] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:12:32,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:12:32,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:12:32,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541901868] [2022-07-19 15:12:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:12:32,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:12:32,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:32,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:12:32,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:12:32,684 INFO L87 Difference]: Start difference. First operand 23 states and 34 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:32,704 INFO L93 Difference]: Finished difference Result 41 states and 59 transitions. [2022-07-19 15:12:32,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:12:32,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 15:12:32,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:32,706 INFO L225 Difference]: With dead ends: 41 [2022-07-19 15:12:32,707 INFO L226 Difference]: Without dead ends: 32 [2022-07-19 15:12:32,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:12:32,709 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:32,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 19 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:32,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-19 15:12:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-07-19 15:12:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.5) internal successors, (39), 26 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) [2022-07-19 15:12:32,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 39 transitions. [2022-07-19 15:12:32,720 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 39 transitions. Word has length 12 [2022-07-19 15:12:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:32,720 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 39 transitions. [2022-07-19 15:12:32,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,721 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 39 transitions. [2022-07-19 15:12:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 15:12:32,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,721 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 15:12:32,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,722 INFO L85 PathProgramCache]: Analyzing trace with hash -492890182, now seen corresponding path program 1 times [2022-07-19 15:12:32,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686114255] [2022-07-19 15:12:32,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686114255] [2022-07-19 15:12:32,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686114255] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:12:32,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:12:32,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:12:32,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202896792] [2022-07-19 15:12:32,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:12:32,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:12:32,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:32,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:12:32,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:12:32,755 INFO L87 Difference]: Start difference. First operand 27 states and 39 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:32,782 INFO L93 Difference]: Finished difference Result 38 states and 55 transitions. [2022-07-19 15:12:32,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:12:32,782 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 15:12:32,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:32,783 INFO L225 Difference]: With dead ends: 38 [2022-07-19 15:12:32,783 INFO L226 Difference]: Without dead ends: 21 [2022-07-19 15:12:32,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:12:32,784 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 3 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:32,785 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 31 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-19 15:12:32,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-19 15:12:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.5) internal successors, (30), 20 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) [2022-07-19 15:12:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 30 transitions. [2022-07-19 15:12:32,789 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 30 transitions. Word has length 12 [2022-07-19 15:12:32,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:32,789 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 30 transitions. [2022-07-19 15:12:32,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:32,789 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 30 transitions. [2022-07-19 15:12:32,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-19 15:12:32,790 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:32,790 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:32,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 15:12:32,791 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:32,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:32,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1431516133, now seen corresponding path program 1 times [2022-07-19 15:12:32,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:32,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274679791] [2022-07-19 15:12:32,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:32,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:32,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:32,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274679791] [2022-07-19 15:12:32,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274679791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:32,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864114529] [2022-07-19 15:12:32,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:32,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:32,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:32,888 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) [2022-07-19 15:12:32,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:12:32,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:12:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:33,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:33,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864114529] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:33,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-19 15:12:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378608889] [2022-07-19 15:12:33,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:33,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:12:33,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:33,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:12:33,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:12:33,066 INFO L87 Difference]: Start difference. First operand 21 states and 30 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:33,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:33,201 INFO L93 Difference]: Finished difference Result 84 states and 118 transitions. [2022-07-19 15:12:33,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:12:33,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-07-19 15:12:33,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:33,206 INFO L225 Difference]: With dead ends: 84 [2022-07-19 15:12:33,207 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 15:12:33,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:12:33,211 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 55 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:33,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 62 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:12:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 15:12:33,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 33. [2022-07-19 15:12:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 47 transitions. [2022-07-19 15:12:33,232 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 47 transitions. Word has length 12 [2022-07-19 15:12:33,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:33,232 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 47 transitions. [2022-07-19 15:12:33,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:33,232 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 47 transitions. [2022-07-19 15:12:33,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-19 15:12:33,233 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:33,234 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:33,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 15:12:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-19 15:12:33,450 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1643101482, now seen corresponding path program 1 times [2022-07-19 15:12:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:33,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980372486] [2022-07-19 15:12:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:33,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:33,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:33,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980372486] [2022-07-19 15:12:33,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980372486] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:33,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866294146] [2022-07-19 15:12:33,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:33,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:33,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:33,548 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) [2022-07-19 15:12:33,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:12:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:33,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:12:33,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:33,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:12:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:12:33,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866294146] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:33,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:33,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4, 4] total 9 [2022-07-19 15:12:33,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114204973] [2022-07-19 15:12:33,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:33,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:12:33,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:33,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:12:33,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:12:33,630 INFO L87 Difference]: Start difference. First operand 33 states and 47 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-07-19 15:12:33,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:33,848 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-07-19 15:12:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:12:33,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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 [2022-07-19 15:12:33,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:33,850 INFO L225 Difference]: With dead ends: 77 [2022-07-19 15:12:33,850 INFO L226 Difference]: Without dead ends: 67 [2022-07-19 15:12:33,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:12:33,851 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:33,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 57 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:12:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-07-19 15:12:33,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2022-07-19 15:12:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.4523809523809523) internal successors, (61), 42 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 61 transitions. [2022-07-19 15:12:33,862 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 61 transitions. Word has length 14 [2022-07-19 15:12:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:33,862 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 61 transitions. [2022-07-19 15:12:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 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) [2022-07-19 15:12:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 61 transitions. [2022-07-19 15:12:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 15:12:33,864 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:33,864 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:33,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:34,064 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,SelfDestructingSolverStorable6 [2022-07-19 15:12:34,065 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:34,065 INFO L85 PathProgramCache]: Analyzing trace with hash 834986528, now seen corresponding path program 2 times [2022-07-19 15:12:34,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:34,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996979422] [2022-07-19 15:12:34,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:34,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:34,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:34,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:34,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996979422] [2022-07-19 15:12:34,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996979422] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:34,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341541654] [2022-07-19 15:12:34,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:12:34,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:34,154 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:34,157 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) [2022-07-19 15:12:34,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:12:34,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:12:34,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:34,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:12:34,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:34,259 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:34,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:34,349 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:34,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341541654] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:34,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:34,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-19 15:12:34,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924861820] [2022-07-19 15:12:34,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:34,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-19 15:12:34,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-19 15:12:34,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:12:34,351 INFO L87 Difference]: Start difference. First operand 43 states and 61 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:35,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:35,197 INFO L93 Difference]: Finished difference Result 223 states and 326 transitions. [2022-07-19 15:12:35,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:12:35,197 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 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 [2022-07-19 15:12:35,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:35,198 INFO L225 Difference]: With dead ends: 223 [2022-07-19 15:12:35,198 INFO L226 Difference]: Without dead ends: 206 [2022-07-19 15:12:35,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-07-19 15:12:35,199 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 366 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:35,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 282 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:12:35,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-07-19 15:12:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 70. [2022-07-19 15:12:35,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.434782608695652) internal successors, (99), 69 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:35,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 99 transitions. [2022-07-19 15:12:35,212 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 99 transitions. Word has length 15 [2022-07-19 15:12:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:35,213 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 99 transitions. [2022-07-19 15:12:35,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:35,213 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 99 transitions. [2022-07-19 15:12:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-19 15:12:35,214 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:35,214 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:35,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:35,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:35,428 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:35,428 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2022-07-19 15:12:35,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:35,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353504726] [2022-07-19 15:12:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:35,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:35,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:12:35,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353504726] [2022-07-19 15:12:35,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353504726] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:35,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598591439] [2022-07-19 15:12:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:35,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:35,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:35,515 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) [2022-07-19 15:12:35,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:12:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:35,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:12:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:12:35,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:12:35,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598591439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:35,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:35,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2022-07-19 15:12:35,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336494474] [2022-07-19 15:12:35,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:35,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:12:35,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:35,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:12:35,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:12:35,635 INFO L87 Difference]: Start difference. First operand 70 states and 99 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:35,677 INFO L93 Difference]: Finished difference Result 77 states and 106 transitions. [2022-07-19 15:12:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:12:35,678 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-19 15:12:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:35,681 INFO L225 Difference]: With dead ends: 77 [2022-07-19 15:12:35,681 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 15:12:35,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:12:35,683 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:35,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:35,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 15:12:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-07-19 15:12:35,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4285714285714286) internal successors, (100), 70 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) [2022-07-19 15:12:35,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 100 transitions. [2022-07-19 15:12:35,703 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 100 transitions. Word has length 16 [2022-07-19 15:12:35,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:35,704 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 100 transitions. [2022-07-19 15:12:35,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:35,704 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2022-07-19 15:12:35,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 15:12:35,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:35,707 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:35,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:35,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:35,931 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:35,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:35,931 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2022-07-19 15:12:35,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:35,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101135541] [2022-07-19 15:12:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:35,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:36,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:12:36,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:36,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101135541] [2022-07-19 15:12:36,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101135541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:36,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754683193] [2022-07-19 15:12:36,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:12:36,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:36,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:36,011 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) [2022-07-19 15:12:36,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:12:36,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:12:36,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:36,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:12:36,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:36,074 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:12:36,074 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:36,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:12:36,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754683193] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:36,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:36,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 8 [2022-07-19 15:12:36,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879136075] [2022-07-19 15:12:36,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:36,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:12:36,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:36,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:12:36,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:12:36,094 INFO L87 Difference]: Start difference. First operand 71 states and 100 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:36,145 INFO L93 Difference]: Finished difference Result 91 states and 124 transitions. [2022-07-19 15:12:36,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:12:36,146 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 15:12:36,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:36,147 INFO L225 Difference]: With dead ends: 91 [2022-07-19 15:12:36,147 INFO L226 Difference]: Without dead ends: 74 [2022-07-19 15:12:36,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:12:36,148 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:36,149 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 75 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:12:36,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-07-19 15:12:36,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2022-07-19 15:12:36,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.459016393442623) internal successors, (89), 61 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 89 transitions. [2022-07-19 15:12:36,159 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 89 transitions. Word has length 17 [2022-07-19 15:12:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:36,160 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 89 transitions. [2022-07-19 15:12:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 89 transitions. [2022-07-19 15:12:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 15:12:36,161 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:36,161 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:36,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:36,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 15:12:36,376 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:36,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:36,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 1 times [2022-07-19 15:12:36,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:36,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198511239] [2022-07-19 15:12:36,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:36,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:12:36,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:36,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198511239] [2022-07-19 15:12:36,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198511239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:36,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385267277] [2022-07-19 15:12:36,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:36,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:36,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:36,447 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) [2022-07-19 15:12:36,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:12:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:12:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:36,545 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:12:36,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:36,606 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:12:36,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385267277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:36,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:36,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-07-19 15:12:36,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466268373] [2022-07-19 15:12:36,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:36,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:12:36,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:36,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:12:36,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:12:36,608 INFO L87 Difference]: Start difference. First operand 62 states and 89 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:36,802 INFO L93 Difference]: Finished difference Result 118 states and 156 transitions. [2022-07-19 15:12:36,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 15:12:36,802 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-07-19 15:12:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:36,803 INFO L225 Difference]: With dead ends: 118 [2022-07-19 15:12:36,803 INFO L226 Difference]: Without dead ends: 98 [2022-07-19 15:12:36,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:12:36,804 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 70 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:36,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 127 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:12:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-19 15:12:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 58. [2022-07-19 15:12:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.4385964912280702) internal successors, (82), 57 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-07-19 15:12:36,812 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 17 [2022-07-19 15:12:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:36,813 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-07-19 15:12:36,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-07-19 15:12:36,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 15:12:36,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:36,814 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:36,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:37,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:37,030 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:37,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:37,031 INFO L85 PathProgramCache]: Analyzing trace with hash 855427872, now seen corresponding path program 2 times [2022-07-19 15:12:37,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:37,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512498598] [2022-07-19 15:12:37,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:37,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:37,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:37,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:37,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512498598] [2022-07-19 15:12:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512498598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518607659] [2022-07-19 15:12:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:12:37,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:37,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:37,118 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) [2022-07-19 15:12:37,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:12:37,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:12:37,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:37,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:12:37,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:12:37,244 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:12:37,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518607659] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:37,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:37,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 18 [2022-07-19 15:12:37,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688950550] [2022-07-19 15:12:37,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:37,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 15:12:37,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 15:12:37,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:12:37,390 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-07-19 15:12:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:38,241 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2022-07-19 15:12:38,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 15:12:38,242 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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 17 [2022-07-19 15:12:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:38,242 INFO L225 Difference]: With dead ends: 137 [2022-07-19 15:12:38,242 INFO L226 Difference]: Without dead ends: 118 [2022-07-19 15:12:38,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:12:38,244 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 101 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:38,244 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 154 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:12:38,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-07-19 15:12:38,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 80. [2022-07-19 15:12:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 79 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:38,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 112 transitions. [2022-07-19 15:12:38,256 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 112 transitions. Word has length 17 [2022-07-19 15:12:38,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:38,256 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 112 transitions. [2022-07-19 15:12:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 18 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) [2022-07-19 15:12:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 112 transitions. [2022-07-19 15:12:38,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:12:38,257 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:38,257 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:38,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:38,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:38,486 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:38,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:38,486 INFO L85 PathProgramCache]: Analyzing trace with hash 1780724800, now seen corresponding path program 1 times [2022-07-19 15:12:38,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:38,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462446781] [2022-07-19 15:12:38,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:38,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:38,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:38,545 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:12:38,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462446781] [2022-07-19 15:12:38,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462446781] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992535854] [2022-07-19 15:12:38,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:38,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:38,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:38,548 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) [2022-07-19 15:12:38,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:12:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:38,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:12:38,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:38,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:12:38,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:38,664 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:12:38,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992535854] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:38,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:38,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-07-19 15:12:38,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941615656] [2022-07-19 15:12:38,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:38,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 15:12:38,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:38,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 15:12:38,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:12:38,666 INFO L87 Difference]: Start difference. First operand 80 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-07-19 15:12:38,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:38,737 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-07-19 15:12:38,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 15:12:38,737 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) Word has length 19 [2022-07-19 15:12:38,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:38,738 INFO L225 Difference]: With dead ends: 110 [2022-07-19 15:12:38,738 INFO L226 Difference]: Without dead ends: 101 [2022-07-19 15:12:38,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:12:38,739 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 44 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:38,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 65 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:12:38,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-07-19 15:12:38,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 81. [2022-07-19 15:12:38,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.375) internal successors, (110), 80 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:38,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 110 transitions. [2022-07-19 15:12:38,749 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 110 transitions. Word has length 19 [2022-07-19 15:12:38,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:38,750 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 110 transitions. [2022-07-19 15:12:38,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 8 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) [2022-07-19 15:12:38,750 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 110 transitions. [2022-07-19 15:12:38,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:12:38,750 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:38,751 INFO L195 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:38,778 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:38,967 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,SelfDestructingSolverStorable12 [2022-07-19 15:12:38,967 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:38,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:38,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1674725392, now seen corresponding path program 2 times [2022-07-19 15:12:38,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:38,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813995606] [2022-07-19 15:12:38,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:38,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:38,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:12:39,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813995606] [2022-07-19 15:12:39,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813995606] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:39,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338311922] [2022-07-19 15:12:39,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:12:39,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:39,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:39,073 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) [2022-07-19 15:12:39,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:12:39,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:12:39,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:39,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 15:12:39,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:39,159 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:12:39,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:39,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:12:39,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338311922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:39,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:39,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-07-19 15:12:39,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134831970] [2022-07-19 15:12:39,275 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:39,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:12:39,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:39,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:12:39,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:12:39,276 INFO L87 Difference]: Start difference. First operand 81 states and 110 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:42,009 INFO L93 Difference]: Finished difference Result 313 states and 428 transitions. [2022-07-19 15:12:42,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-19 15:12:42,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-19 15:12:42,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:42,010 INFO L225 Difference]: With dead ends: 313 [2022-07-19 15:12:42,010 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 15:12:42,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1462 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1180, Invalid=3376, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 15:12:42,013 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 462 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:42,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 390 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:12:42,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 15:12:42,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 100. [2022-07-19 15:12:42,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3737373737373737) internal successors, (136), 99 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:42,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 136 transitions. [2022-07-19 15:12:42,026 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 136 transitions. Word has length 19 [2022-07-19 15:12:42,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:42,027 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 136 transitions. [2022-07-19 15:12:42,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:42,027 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 136 transitions. [2022-07-19 15:12:42,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 15:12:42,027 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:42,028 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:42,052 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:42,250 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,SelfDestructingSolverStorable13 [2022-07-19 15:12:42,250 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:42,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:42,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1617038102, now seen corresponding path program 3 times [2022-07-19 15:12:42,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:42,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42388495] [2022-07-19 15:12:42,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:42,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:42,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:42,373 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:42,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42388495] [2022-07-19 15:12:42,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42388495] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:42,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199797806] [2022-07-19 15:12:42,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:12:42,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:42,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:42,375 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) [2022-07-19 15:12:42,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:12:42,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:12:42,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:42,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:12:42,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:42,535 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:12:42,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:42,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:12:42,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199797806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:42,707 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:42,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 22 [2022-07-19 15:12:42,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973517850] [2022-07-19 15:12:42,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:42,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:12:42,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:42,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:12:42,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=408, Unknown=0, NotChecked=0, Total=462 [2022-07-19 15:12:42,709 INFO L87 Difference]: Start difference. First operand 100 states and 136 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2022-07-19 15:12:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:44,785 INFO L93 Difference]: Finished difference Result 219 states and 293 transitions. [2022-07-19 15:12:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-19 15:12:44,786 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 20 [2022-07-19 15:12:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:44,786 INFO L225 Difference]: With dead ends: 219 [2022-07-19 15:12:44,787 INFO L226 Difference]: Without dead ends: 193 [2022-07-19 15:12:44,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=531, Invalid=4439, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 15:12:44,788 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 185 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:44,789 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 267 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:12:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-07-19 15:12:44,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 122. [2022-07-19 15:12:44,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3884297520661157) internal successors, (168), 121 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 168 transitions. [2022-07-19 15:12:44,802 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 168 transitions. Word has length 20 [2022-07-19 15:12:44,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:44,803 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 168 transitions. [2022-07-19 15:12:44,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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) [2022-07-19 15:12:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 168 transitions. [2022-07-19 15:12:44,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:12:44,803 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:44,804 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:44,821 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-07-19 15:12:45,015 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,SelfDestructingSolverStorable14 [2022-07-19 15:12:45,015 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 3 times [2022-07-19 15:12:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:45,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097973237] [2022-07-19 15:12:45,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:45,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 15:12:45,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097973237] [2022-07-19 15:12:45,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097973237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:45,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217064618] [2022-07-19 15:12:45,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:12:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:45,081 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) [2022-07-19 15:12:45,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:12:45,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 15:12:45,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:45,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:12:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 15:12:45,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:45,552 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:12:45,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217064618] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:45,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:45,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 12, 10] total 22 [2022-07-19 15:12:45,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697393893] [2022-07-19 15:12:45,553 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:45,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:12:45,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:45,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:12:45,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2022-07-19 15:12:45,554 INFO L87 Difference]: Start difference. First operand 122 states and 168 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-07-19 15:12:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:46,007 INFO L93 Difference]: Finished difference Result 261 states and 350 transitions. [2022-07-19 15:12:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 15:12:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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 22 [2022-07-19 15:12:46,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:46,009 INFO L225 Difference]: With dead ends: 261 [2022-07-19 15:12:46,009 INFO L226 Difference]: Without dead ends: 238 [2022-07-19 15:12:46,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:12:46,010 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 216 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:46,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 258 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:12:46,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-07-19 15:12:46,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 168. [2022-07-19 15:12:46,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.4610778443113772) internal successors, (244), 167 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 244 transitions. [2022-07-19 15:12:46,030 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 244 transitions. Word has length 22 [2022-07-19 15:12:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:46,031 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 244 transitions. [2022-07-19 15:12:46,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 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) [2022-07-19 15:12:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 244 transitions. [2022-07-19 15:12:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:12:46,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:46,032 INFO L195 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:46,055 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:46,254 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,SelfDestructingSolverStorable15 [2022-07-19 15:12:46,254 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:46,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -437492933, now seen corresponding path program 3 times [2022-07-19 15:12:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:46,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882278638] [2022-07-19 15:12:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:46,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:46,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882278638] [2022-07-19 15:12:46,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882278638] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:46,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57820803] [2022-07-19 15:12:46,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:12:46,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:46,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:46,412 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) [2022-07-19 15:12:46,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:12:46,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 15:12:46,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:46,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-19 15:12:46,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:46,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:46,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57820803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:46,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:46,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 27 [2022-07-19 15:12:46,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556368601] [2022-07-19 15:12:46,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:46,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 15:12:46,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:46,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 15:12:46,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2022-07-19 15:12:46,771 INFO L87 Difference]: Start difference. First operand 168 states and 244 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-07-19 15:12:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:58,530 INFO L93 Difference]: Finished difference Result 952 states and 1466 transitions. [2022-07-19 15:12:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 15:12:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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 [2022-07-19 15:12:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:58,533 INFO L225 Difference]: With dead ends: 952 [2022-07-19 15:12:58,533 INFO L226 Difference]: Without dead ends: 917 [2022-07-19 15:12:58,534 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=811, Invalid=1541, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:12:58,534 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1241 mSDsluCounter, 1228 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1241 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:58,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1241 Valid, 1328 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [434 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-07-19 15:12:58,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-07-19 15:12:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 255. [2022-07-19 15:12:58,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.4448818897637796) internal successors, (367), 254 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:58,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 367 transitions. [2022-07-19 15:12:58,573 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 367 transitions. Word has length 22 [2022-07-19 15:12:58,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:58,574 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 367 transitions. [2022-07-19 15:12:58,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 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) [2022-07-19 15:12:58,574 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 367 transitions. [2022-07-19 15:12:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 15:12:58,575 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:58,575 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:58,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:58,779 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,SelfDestructingSolverStorable16 [2022-07-19 15:12:58,780 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 824854335, now seen corresponding path program 2 times [2022-07-19 15:12:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103956743] [2022-07-19 15:12:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:58,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:12:58,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:58,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103956743] [2022-07-19 15:12:58,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103956743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:58,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640273997] [2022-07-19 15:12:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:12:58,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:58,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:58,872 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) [2022-07-19 15:12:58,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:12:58,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:12:58,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:12:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:12:58,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:58,991 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:12:58,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640273997] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:58,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:58,991 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-07-19 15:12:58,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792777526] [2022-07-19 15:12:58,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:58,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:12:58,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:58,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:12:58,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:12:58,992 INFO L87 Difference]: Start difference. First operand 255 states and 367 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-07-19 15:12:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:12:59,114 INFO L93 Difference]: Finished difference Result 298 states and 422 transitions. [2022-07-19 15:12:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:12:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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 23 [2022-07-19 15:12:59,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:12:59,116 INFO L225 Difference]: With dead ends: 298 [2022-07-19 15:12:59,116 INFO L226 Difference]: Without dead ends: 285 [2022-07-19 15:12:59,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:12:59,117 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 59 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:12:59,117 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 135 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:12:59,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-07-19 15:12:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 258. [2022-07-19 15:12:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 1.424124513618677) internal successors, (366), 257 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:12:59,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 366 transitions. [2022-07-19 15:12:59,156 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 366 transitions. Word has length 23 [2022-07-19 15:12:59,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:12:59,156 INFO L495 AbstractCegarLoop]: Abstraction has 258 states and 366 transitions. [2022-07-19 15:12:59,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 11 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) [2022-07-19 15:12:59,156 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 366 transitions. [2022-07-19 15:12:59,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 15:12:59,157 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:12:59,157 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:12:59,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:12:59,371 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,SelfDestructingSolverStorable17 [2022-07-19 15:12:59,371 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:12:59,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:12:59,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1390241056, now seen corresponding path program 4 times [2022-07-19 15:12:59,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:12:59,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824838516] [2022-07-19 15:12:59,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:12:59,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:12:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:12:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:12:59,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:12:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824838516] [2022-07-19 15:12:59,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824838516] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:12:59,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843710806] [2022-07-19 15:12:59,506 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:12:59,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:12:59,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:12:59,512 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) [2022-07-19 15:12:59,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:12:59,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:12:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:12:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:12:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:12:59,622 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:12:59,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:12:59,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:12:59,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843710806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:12:59,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:12:59,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2022-07-19 15:12:59,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066172639] [2022-07-19 15:12:59,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:12:59,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-19 15:12:59,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:12:59,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-19 15:12:59,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:12:59,654 INFO L87 Difference]: Start difference. First operand 258 states and 366 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-07-19 15:13:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:13:01,843 INFO L93 Difference]: Finished difference Result 401 states and 549 transitions. [2022-07-19 15:13:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 15:13:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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 [2022-07-19 15:13:01,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:13:01,844 INFO L225 Difference]: With dead ends: 401 [2022-07-19 15:13:01,844 INFO L226 Difference]: Without dead ends: 360 [2022-07-19 15:13:01,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=610, Invalid=5242, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 15:13:01,847 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 196 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 928 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:13:01,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 241 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:13:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-07-19 15:13:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2022-07-19 15:13:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.3969465648854962) internal successors, (366), 262 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:01,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 366 transitions. [2022-07-19 15:13:01,892 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 366 transitions. Word has length 23 [2022-07-19 15:13:01,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:13:01,892 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 366 transitions. [2022-07-19 15:13:01,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 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) [2022-07-19 15:13:01,892 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 366 transitions. [2022-07-19 15:13:01,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 15:13:01,892 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:13:01,893 INFO L195 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:13:01,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:13:02,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:02,103 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:13:02,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:13:02,104 INFO L85 PathProgramCache]: Analyzing trace with hash 89056265, now seen corresponding path program 1 times [2022-07-19 15:13:02,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:13:02,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119556747] [2022-07-19 15:13:02,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:13:02,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:13:02,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:13:02,266 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:13:02,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:13:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119556747] [2022-07-19 15:13:02,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119556747] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:13:02,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294233596] [2022-07-19 15:13:02,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:13:02,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:02,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:13:02,268 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) [2022-07-19 15:13:02,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:13:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:13:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-19 15:13:02,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:13:02,357 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:13:02,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:13:02,631 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 15:13:02,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294233596] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:13:02,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:13:02,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2022-07-19 15:13:02,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422565790] [2022-07-19 15:13:02,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:13:02,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 15:13:02,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:13:02,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 15:13:02,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=700, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:13:02,633 INFO L87 Difference]: Start difference. First operand 263 states and 366 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:11,732 WARN L833 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 7) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 10) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 1) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 4) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~y~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 6) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 2) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 3) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 12) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 8) 4294967296)) (< 0 (mod |c_ULTIMATE.start_main_~z~0#1| 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 5) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 11) 4294967296)) (< 0 (mod (+ |c_ULTIMATE.start_main_~y~0#1| 9) 4294967296))) is different from false [2022-07-19 15:13:34,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:13:34,317 INFO L93 Difference]: Finished difference Result 1045 states and 1530 transitions. [2022-07-19 15:13:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-19 15:13:34,317 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 15:13:34,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:13:34,320 INFO L225 Difference]: With dead ends: 1045 [2022-07-19 15:13:34,320 INFO L226 Difference]: Without dead ends: 1005 [2022-07-19 15:13:34,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 29.9s TimeCoverageRelationStatistics Valid=1795, Invalid=4060, Unknown=1, NotChecked=150, Total=6006 [2022-07-19 15:13:34,322 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 1649 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1649 SdHoareTripleChecker+Valid, 1409 SdHoareTripleChecker+Invalid, 1568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:13:34,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1649 Valid, 1409 Invalid, 1568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 962 Invalid, 0 Unknown, 1 Unchecked, 2.0s Time] [2022-07-19 15:13:34,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2022-07-19 15:13:34,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 279. [2022-07-19 15:13:34,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 1.3992805755395683) internal successors, (389), 278 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:34,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 389 transitions. [2022-07-19 15:13:34,373 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 389 transitions. Word has length 24 [2022-07-19 15:13:34,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:13:34,373 INFO L495 AbstractCegarLoop]: Abstraction has 279 states and 389 transitions. [2022-07-19 15:13:34,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:34,373 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 389 transitions. [2022-07-19 15:13:34,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:13:34,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:13:34,374 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:13:34,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-19 15:13:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:34,590 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:13:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:13:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 3 times [2022-07-19 15:13:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:13:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61046411] [2022-07-19 15:13:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:13:34,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:13:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:13:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 15:13:34,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:13:34,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61046411] [2022-07-19 15:13:34,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61046411] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:13:34,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933070557] [2022-07-19 15:13:34,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:13:34,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:34,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:13:34,725 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) [2022-07-19 15:13:34,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:13:34,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:13:34,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:13:34,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:13:34,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:13:34,876 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:13:34,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:13:34,991 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:13:34,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933070557] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:13:34,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:13:34,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2022-07-19 15:13:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099164113] [2022-07-19 15:13:34,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:13:34,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:13:34,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:13:34,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:13:34,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:13:34,993 INFO L87 Difference]: Start difference. First operand 279 states and 389 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:13:38,610 INFO L93 Difference]: Finished difference Result 850 states and 1052 transitions. [2022-07-19 15:13:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-07-19 15:13:38,611 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 15:13:38,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:13:38,613 INFO L225 Difference]: With dead ends: 850 [2022-07-19 15:13:38,613 INFO L226 Difference]: Without dead ends: 811 [2022-07-19 15:13:38,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4065 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1472, Invalid=11184, Unknown=0, NotChecked=0, Total=12656 [2022-07-19 15:13:38,617 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 596 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 596 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 1843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:13:38,617 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [596 Valid, 1237 Invalid, 1843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 15:13:38,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2022-07-19 15:13:38,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 315. [2022-07-19 15:13:38,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 1.4363057324840764) internal successors, (451), 314 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:38,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 451 transitions. [2022-07-19 15:13:38,681 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 451 transitions. Word has length 26 [2022-07-19 15:13:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:13:38,681 INFO L495 AbstractCegarLoop]: Abstraction has 315 states and 451 transitions. [2022-07-19 15:13:38,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:38,682 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 451 transitions. [2022-07-19 15:13:38,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:13:38,682 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:13:38,682 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:13:38,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:13:38,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:38,896 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:13:38,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:13:38,896 INFO L85 PathProgramCache]: Analyzing trace with hash -492280992, now seen corresponding path program 4 times [2022-07-19 15:13:38,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:13:38,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650440901] [2022-07-19 15:13:38,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:13:38,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:13:38,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:13:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:13:39,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:13:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650440901] [2022-07-19 15:13:39,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650440901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:13:39,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840843076] [2022-07-19 15:13:39,013 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:13:39,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:39,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:13:39,014 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) [2022-07-19 15:13:39,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:13:39,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:13:39,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:13:39,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 15:13:39,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:13:39,090 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:13:39,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:13:39,255 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:13:39,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840843076] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:13:39,256 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:13:39,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2022-07-19 15:13:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381134698] [2022-07-19 15:13:39,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:13:39,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:13:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:13:39,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:13:39,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:13:39,257 INFO L87 Difference]: Start difference. First operand 315 states and 451 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:47,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:13:47,875 INFO L93 Difference]: Finished difference Result 744 states and 996 transitions. [2022-07-19 15:13:47,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-07-19 15:13:47,876 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-19 15:13:47,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:13:47,878 INFO L225 Difference]: With dead ends: 744 [2022-07-19 15:13:47,878 INFO L226 Difference]: Without dead ends: 688 [2022-07-19 15:13:47,880 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4556 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=2834, Invalid=10048, Unknown=0, NotChecked=0, Total=12882 [2022-07-19 15:13:47,881 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 545 mSDsluCounter, 604 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:13:47,881 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 666 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 15:13:47,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-07-19 15:13:47,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 349. [2022-07-19 15:13:47,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 1.4367816091954022) internal successors, (500), 348 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:47,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 500 transitions. [2022-07-19 15:13:47,948 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 500 transitions. Word has length 27 [2022-07-19 15:13:47,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:13:47,948 INFO L495 AbstractCegarLoop]: Abstraction has 349 states and 500 transitions. [2022-07-19 15:13:47,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 23 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:13:47,948 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 500 transitions. [2022-07-19 15:13:47,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:13:47,949 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:13:47,949 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:13:47,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 15:13:48,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:48,163 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:13:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:13:48,164 INFO L85 PathProgramCache]: Analyzing trace with hash 682825104, now seen corresponding path program 5 times [2022-07-19 15:13:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:13:48,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714537650] [2022-07-19 15:13:48,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:13:48,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:13:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:13:48,372 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:13:48,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:13:48,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714537650] [2022-07-19 15:13:48,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714537650] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:13:48,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121240112] [2022-07-19 15:13:48,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:13:48,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:13:48,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:13:48,374 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) [2022-07-19 15:13:48,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:13:48,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-19 15:13:48,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:13:48,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-19 15:13:48,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:13:48,751 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:13:48,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:13:49,106 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:13:49,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121240112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:13:49,107 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:13:49,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2022-07-19 15:13:49,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435405929] [2022-07-19 15:13:49,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:13:49,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:13:49,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:13:49,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:13:49,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:13:49,109 INFO L87 Difference]: Start difference. First operand 349 states and 500 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:14:00,077 WARN L233 SmtUtils]: Spent 5.81s 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) [2022-07-19 15:14:15,907 WARN L233 SmtUtils]: Spent 7.34s on a formula simplification that was a NOOP. DAG size: 64 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 15:16:17,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:17,742 INFO L93 Difference]: Finished difference Result 1216 states and 1844 transitions. [2022-07-19 15:16:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-07-19 15:16:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 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 [2022-07-19 15:16:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:17,745 INFO L225 Difference]: With dead ends: 1216 [2022-07-19 15:16:17,745 INFO L226 Difference]: Without dead ends: 1163 [2022-07-19 15:16:17,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8797 ImplicationChecksByTransitivity, 141.8s TimeCoverageRelationStatistics Valid=6160, Invalid=16791, Unknown=1, NotChecked=0, Total=22952 [2022-07-19 15:16:17,748 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 1811 mSDsluCounter, 1625 mSDsCounter, 0 mSdLazyCounter, 1395 mSolverCounterSat, 1151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1811 SdHoareTripleChecker+Valid, 1734 SdHoareTripleChecker+Invalid, 2546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1151 IncrementalHoareTripleChecker+Valid, 1395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1811 Valid, 1734 Invalid, 2546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1151 Valid, 1395 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-07-19 15:16:17,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-07-19 15:16:17,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 366. [2022-07-19 15:16:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 365 states have (on average 1.4465753424657535) internal successors, (528), 365 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:17,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 528 transitions. [2022-07-19 15:16:17,819 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 528 transitions. Word has length 27 [2022-07-19 15:16:17,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:17,820 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 528 transitions. [2022-07-19 15:16:17,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:17,820 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 528 transitions. [2022-07-19 15:16:17,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 15:16:17,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:17,821 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:17,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:18,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:18,025 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:18,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:18,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1431503210, now seen corresponding path program 6 times [2022-07-19 15:16:18,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:18,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789483975] [2022-07-19 15:16:18,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:18,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:18,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:18,232 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:16:18,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789483975] [2022-07-19 15:16:18,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789483975] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:18,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077606009] [2022-07-19 15:16:18,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:16:18,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:18,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:18,235 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:18,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:16:18,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:16:18,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:18,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:16:18,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:18,414 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:16:18,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:16:18,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077606009] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:18,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:18,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2022-07-19 15:16:18,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076182994] [2022-07-19 15:16:18,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:18,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 15:16:18,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:18,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 15:16:18,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2022-07-19 15:16:18,440 INFO L87 Difference]: Start difference. First operand 366 states and 528 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:21,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:21,100 INFO L93 Difference]: Finished difference Result 546 states and 753 transitions. [2022-07-19 15:16:21,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-19 15:16:21,101 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 15:16:21,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:21,102 INFO L225 Difference]: With dead ends: 546 [2022-07-19 15:16:21,102 INFO L226 Difference]: Without dead ends: 501 [2022-07-19 15:16:21,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2011 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=634, Invalid=6506, Unknown=0, NotChecked=0, Total=7140 [2022-07-19 15:16:21,104 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 216 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:21,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 384 Invalid, 1563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:16:21,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2022-07-19 15:16:21,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 395. [2022-07-19 15:16:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 1.4111675126903553) internal successors, (556), 394 states have internal predecessors, (556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 556 transitions. [2022-07-19 15:16:21,180 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 556 transitions. Word has length 28 [2022-07-19 15:16:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:21,180 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 556 transitions. [2022-07-19 15:16:21,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 556 transitions. [2022-07-19 15:16:21,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:16:21,181 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:21,181 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:21,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:21,406 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:21,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:21,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1845062752, now seen corresponding path program 4 times [2022-07-19 15:16:21,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:21,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631743329] [2022-07-19 15:16:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:21,807 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:16:21,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:21,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631743329] [2022-07-19 15:16:21,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631743329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:21,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258702019] [2022-07-19 15:16:21,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:16:21,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:21,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:21,812 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:21,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 15:16:21,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:16:21,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-19 15:16:21,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:22,060 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:16:22,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:16:22,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258702019] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:22,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:22,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8, 8] total 23 [2022-07-19 15:16:22,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001182728] [2022-07-19 15:16:22,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:22,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:16:22,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:22,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:16:22,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:16:22,304 INFO L87 Difference]: Start difference. First operand 395 states and 556 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:22,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:22,602 INFO L93 Difference]: Finished difference Result 404 states and 564 transitions. [2022-07-19 15:16:22,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:16:22,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 15:16:22,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:22,603 INFO L225 Difference]: With dead ends: 404 [2022-07-19 15:16:22,603 INFO L226 Difference]: Without dead ends: 379 [2022-07-19 15:16:22,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 46 SyntacticMatches, 14 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:16:22,604 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:22,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 105 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:16:22,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-07-19 15:16:22,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-07-19 15:16:22,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.4259259259259258) internal successors, (539), 378 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 539 transitions. [2022-07-19 15:16:22,661 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 539 transitions. Word has length 31 [2022-07-19 15:16:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:22,661 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 539 transitions. [2022-07-19 15:16:22,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 539 transitions. [2022-07-19 15:16:22,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:16:22,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:22,662 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:22,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-07-19 15:16:22,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-19 15:16:22,879 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:22,880 INFO L85 PathProgramCache]: Analyzing trace with hash 79133152, now seen corresponding path program 7 times [2022-07-19 15:16:22,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:22,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037769094] [2022-07-19 15:16:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:22,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:23,096 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:16:23,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037769094] [2022-07-19 15:16:23,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037769094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:23,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137390922] [2022-07-19 15:16:23,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:16:23,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:23,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:23,100 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:23,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 15:16:23,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:23,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 15:16:23,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:16:23,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-19 15:16:23,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137390922] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:23,346 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:23,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 24 [2022-07-19 15:16:23,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323324174] [2022-07-19 15:16:23,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:23,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 15:16:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:23,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 15:16:23,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:16:23,348 INFO L87 Difference]: Start difference. First operand 379 states and 539 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-07-19 15:16:30,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:16:30,068 INFO L93 Difference]: Finished difference Result 605 states and 818 transitions. [2022-07-19 15:16:30,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-07-19 15:16:30,071 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 31 [2022-07-19 15:16:30,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:16:30,073 INFO L225 Difference]: With dead ends: 605 [2022-07-19 15:16:30,073 INFO L226 Difference]: Without dead ends: 567 [2022-07-19 15:16:30,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6079 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1325, Invalid=16765, Unknown=0, NotChecked=0, Total=18090 [2022-07-19 15:16:30,076 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 326 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 2057 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 2405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 2057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:16:30,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [326 Valid, 457 Invalid, 2405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 2057 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 15:16:30,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2022-07-19 15:16:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 364. [2022-07-19 15:16:30,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 363 states have (on average 1.418732782369146) internal successors, (515), 363 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:16:30,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 515 transitions. [2022-07-19 15:16:30,137 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 515 transitions. Word has length 31 [2022-07-19 15:16:30,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:16:30,137 INFO L495 AbstractCegarLoop]: Abstraction has 364 states and 515 transitions. [2022-07-19 15:16:30,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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) [2022-07-19 15:16:30,137 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 515 transitions. [2022-07-19 15:16:30,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:16:30,138 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:16:30,138 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:16:30,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 15:16:30,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-19 15:16:30,361 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:16:30,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:16:30,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1097644464, now seen corresponding path program 8 times [2022-07-19 15:16:30,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:16:30,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320284998] [2022-07-19 15:16:30,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:16:30,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:16:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:16:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 15:16:30,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:16:30,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320284998] [2022-07-19 15:16:30,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320284998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:16:30,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476877722] [2022-07-19 15:16:30,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:16:30,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:16:30,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:16:30,518 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:16:30,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 15:16:30,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:16:30,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:16:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:16:30,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:16:30,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:16:30,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:16:31,025 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:16:31,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476877722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:16:31,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:16:31,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18, 18] total 35 [2022-07-19 15:16:31,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514584621] [2022-07-19 15:16:31,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:16:31,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:16:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:16:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:16:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:16:31,027 INFO L87 Difference]: Start difference. First operand 364 states and 515 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 35 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)