./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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-de41.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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 04:04:39,135 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 04:04:39,137 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 04:04:39,181 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 04:04:39,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 04:04:39,182 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 04:04:39,183 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 04:04:39,185 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 04:04:39,187 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 04:04:39,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 04:04:39,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 04:04:39,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 04:04:39,195 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 04:04:39,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 04:04:39,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 04:04:39,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 04:04:39,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 04:04:39,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 04:04:39,201 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 04:04:39,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 04:04:39,203 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 04:04:39,203 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 04:04:39,204 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 04:04:39,205 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 04:04:39,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 04:04:39,207 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 04:04:39,207 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 04:04:39,207 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 04:04:39,208 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 04:04:39,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 04:04:39,209 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 04:04:39,209 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 04:04:39,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 04:04:39,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 04:04:39,210 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 04:04:39,211 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 04:04:39,211 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 04:04:39,212 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 04:04:39,212 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 04:04:39,212 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 04:04:39,213 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 04:04:39,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 04:04:39,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 04:04:39,240 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 04:04:39,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 04:04:39,240 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 04:04:39,240 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 04:04:39,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 04:04:39,241 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 04:04:39,242 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 04:04:39,242 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 04:04:39,242 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 04:04:39,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 04:04:39,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 04:04:39,244 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 04:04:39,244 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 04:04:39,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 04:04:39,245 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 04:04:39,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 04:04:39,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 04:04:39,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 04:04:39,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 04:04:39,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:04:39,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 04:04:39,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 04:04:39,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 04:04:39,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 04:04:39,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 04:04:39,247 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 04:04:39,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 04:04:39,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 04:04:39,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 [2022-07-12 04:04:39,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 04:04:39,446 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 04:04:39,448 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 04:04:39,449 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 04:04:39,449 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 04:04:39,450 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2022-07-12 04:04:39,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f412eb1/fe175f3cc9984beaa6d483f381047ea6/FLAG5c61e0769 [2022-07-12 04:04:39,927 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 04:04:39,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/in-de41.c [2022-07-12 04:04:39,932 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f412eb1/fe175f3cc9984beaa6d483f381047ea6/FLAG5c61e0769 [2022-07-12 04:04:40,332 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83f412eb1/fe175f3cc9984beaa6d483f381047ea6 [2022-07-12 04:04:40,334 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 04:04:40,335 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 04:04:40,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 04:04:40,337 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 04:04:40,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 04:04:40,339 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,340 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bd63409 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40, skipping insertion in model container [2022-07-12 04:04:40,340 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,346 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 04:04:40,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 04:04:40,448 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-de41.c[368,381] [2022-07-12 04:04:40,457 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:04:40,462 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 04:04:40,469 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-de41.c[368,381] [2022-07-12 04:04:40,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 04:04:40,479 INFO L208 MainTranslator]: Completed translation [2022-07-12 04:04:40,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40 WrapperNode [2022-07-12 04:04:40,479 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 04:04:40,480 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 04:04:40,480 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 04:04:40,480 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 04:04:40,485 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,488 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,499 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-07-12 04:04:40,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 04:04:40,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 04:04:40,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 04:04:40,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 04:04:40,504 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,505 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,506 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,507 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,510 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,510 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 04:04:40,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 04:04:40,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 04:04:40,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 04:04:40,512 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (1/1) ... [2022-07-12 04:04:40,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 04:04:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:40,542 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) [2022-07-12 04:04:40,563 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 [2022-07-12 04:04:40,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 04:04:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 04:04:40,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 04:04:40,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 04:04:40,633 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 04:04:40,634 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 04:04:40,762 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 04:04:40,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 04:04:40,767 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-12 04:04:40,769 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:04:40 BoogieIcfgContainer [2022-07-12 04:04:40,769 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 04:04:40,771 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 04:04:40,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 04:04:40,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 04:04:40,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 04:04:40" (1/3) ... [2022-07-12 04:04:40,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb04e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:04:40, skipping insertion in model container [2022-07-12 04:04:40,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 04:04:40" (2/3) ... [2022-07-12 04:04:40,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6eb04e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 04:04:40, skipping insertion in model container [2022-07-12 04:04:40,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 04:04:40" (3/3) ... [2022-07-12 04:04:40,778 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de41.c [2022-07-12 04:04:40,790 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 04:04:40,791 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 04:04:40,848 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 04:04:40,852 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@7133f354, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@f099e84 [2022-07-12 04:04:40,853 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 04:04:40,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 04:04:40,873 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:40,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:40,875 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:40,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1522018600, now seen corresponding path program 1 times [2022-07-12 04:04:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:40,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999095719] [2022-07-12 04:04:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:40,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:40,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:41,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:41,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:41,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999095719] [2022-07-12 04:04:41,038 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999095719] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:04:41,038 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:04:41,038 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 04:04:41,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751856655] [2022-07-12 04:04:41,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:04:41,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-12 04:04:41,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:41,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-12 04:04:41,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-12 04:04:41,078 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:41,089 INFO L93 Difference]: Finished difference Result 27 states and 41 transitions. [2022-07-12 04:04:41,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-12 04:04:41,090 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 04:04:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:41,095 INFO L225 Difference]: With dead ends: 27 [2022-07-12 04:04:41,096 INFO L226 Difference]: Without dead ends: 11 [2022-07-12 04:04:41,102 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 [2022-07-12 04:04:41,105 INFO L413 NwaCegarLoop]: 18 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, 18 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 [2022-07-12 04:04:41,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:41,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2022-07-12 04:04:41,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2022-07-12 04:04:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2022-07-12 04:04:41,129 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 10 [2022-07-12 04:04:41,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:41,130 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2022-07-12 04:04:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,131 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2022-07-12 04:04:41,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-07-12 04:04:41,131 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:41,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:41,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 04:04:41,132 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:41,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1522137764, now seen corresponding path program 1 times [2022-07-12 04:04:41,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:41,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017123309] [2022-07-12 04:04:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:41,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:41,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:41,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017123309] [2022-07-12 04:04:41,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017123309] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:04:41,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:04:41,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-12 04:04:41,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523244010] [2022-07-12 04:04:41,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:04:41,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 04:04:41,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:41,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 04:04:41,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 04:04:41,389 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:41,458 INFO L93 Difference]: Finished difference Result 29 states and 40 transitions. [2022-07-12 04:04:41,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-12 04:04:41,459 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-07-12 04:04:41,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:41,459 INFO L225 Difference]: With dead ends: 29 [2022-07-12 04:04:41,459 INFO L226 Difference]: Without dead ends: 17 [2022-07-12 04:04:41,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:04:41,461 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 16 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:41,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 22 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:41,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-12 04:04:41,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-12 04:04:41,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2022-07-12 04:04:41,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 10 [2022-07-12 04:04:41,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:41,466 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2022-07-12 04:04:41,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,466 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2022-07-12 04:04:41,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-12 04:04:41,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:41,467 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:41,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 04:04:41,467 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:41,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:41,468 INFO L85 PathProgramCache]: Analyzing trace with hash 923648321, now seen corresponding path program 1 times [2022-07-12 04:04:41,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:41,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090173786] [2022-07-12 04:04:41,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:41,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:41,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090173786] [2022-07-12 04:04:41,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090173786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:41,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065682279] [2022-07-12 04:04:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:41,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:41,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:41,547 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) [2022-07-12 04:04:41,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 04:04:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 04:04:41,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:41,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:41,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:41,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065682279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:41,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:41,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-07-12 04:04:41,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018910151] [2022-07-12 04:04:41,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:41,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-12 04:04:41,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:41,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-12 04:04:41,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-07-12 04:04:41,732 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:41,884 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-07-12 04:04:41,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:04:41,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-07-12 04:04:41,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:41,886 INFO L225 Difference]: With dead ends: 65 [2022-07-12 04:04:41,886 INFO L226 Difference]: Without dead ends: 59 [2022-07-12 04:04:41,887 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:04:41,888 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:41,888 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 62 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:04:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-12 04:04:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2022-07-12 04:04:41,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2022-07-12 04:04:41,897 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2022-07-12 04:04:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:41,897 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2022-07-12 04:04:41,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2022-07-12 04:04:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-12 04:04:41,898 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:41,898 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:41,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:42,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:42,104 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:42,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:42,104 INFO L85 PathProgramCache]: Analyzing trace with hash -491381764, now seen corresponding path program 1 times [2022-07-12 04:04:42,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:42,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35067738] [2022-07-12 04:04:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:42,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:42,135 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:42,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:42,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35067738] [2022-07-12 04:04:42,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35067738] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 04:04:42,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 04:04:42,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-12 04:04:42,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968911939] [2022-07-12 04:04:42,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 04:04:42,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:04:42,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:42,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:04:42,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:04:42,138 INFO L87 Difference]: Start difference. First operand 29 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) [2022-07-12 04:04:42,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:42,153 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2022-07-12 04:04:42,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:04:42,153 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 [2022-07-12 04:04:42,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:42,154 INFO L225 Difference]: With dead ends: 34 [2022-07-12 04:04:42,154 INFO L226 Difference]: Without dead ends: 24 [2022-07-12 04:04:42,154 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 [2022-07-12 04:04:42,155 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:42,155 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 27 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:42,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-12 04:04:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-12 04:04:42,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:42,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-12 04:04:42,158 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 12 [2022-07-12 04:04:42,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:42,159 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-12 04:04:42,159 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) [2022-07-12 04:04:42,159 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-12 04:04:42,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-12 04:04:42,159 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:42,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:42,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 04:04:42,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:42,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:42,160 INFO L85 PathProgramCache]: Analyzing trace with hash 607187538, now seen corresponding path program 1 times [2022-07-12 04:04:42,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:42,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065342964] [2022-07-12 04:04:42,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:42,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:42,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:42,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:42,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065342964] [2022-07-12 04:04:42,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065342964] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:42,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180946945] [2022-07-12 04:04:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:42,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:42,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:42,232 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) [2022-07-12 04:04:42,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 04:04:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:42,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-12 04:04:42,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:42,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:42,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:42,432 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:42,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180946945] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:42,433 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:42,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-12 04:04:42,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100193615] [2022-07-12 04:04:42,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:42,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:04:42,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:42,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:04:42,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:04:42,435 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:42,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:42,477 INFO L93 Difference]: Finished difference Result 39 states and 54 transitions. [2022-07-12 04:04:42,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:04:42,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-12 04:04:42,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:42,478 INFO L225 Difference]: With dead ends: 39 [2022-07-12 04:04:42,478 INFO L226 Difference]: Without dead ends: 35 [2022-07-12 04:04:42,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:04:42,479 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:42,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-07-12 04:04:42,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2022-07-12 04:04:42,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.4375) internal successors, (46), 32 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) [2022-07-12 04:04:42,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 46 transitions. [2022-07-12 04:04:42,487 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 46 transitions. Word has length 13 [2022-07-12 04:04:42,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:42,487 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 46 transitions. [2022-07-12 04:04:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:42,487 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 46 transitions. [2022-07-12 04:04:42,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 04:04:42,488 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:42,488 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:42,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:42,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:42,708 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:42,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1644609900, now seen corresponding path program 1 times [2022-07-12 04:04:42,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:42,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016534575] [2022-07-12 04:04:42,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:42,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:42,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:42,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:42,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:42,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016534575] [2022-07-12 04:04:42,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016534575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:42,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000026533] [2022-07-12 04:04:42,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:42,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:42,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:42,952 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) [2022-07-12 04:04:42,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 04:04:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:42,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-12 04:04:42,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:43,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:43,396 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000026533] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:43,396 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:43,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2022-07-12 04:04:43,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804335543] [2022-07-12 04:04:43,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:43,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-12 04:04:43,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:43,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-12 04:04:43,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2022-07-12 04:04:43,398 INFO L87 Difference]: Start difference. First operand 33 states and 46 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2022-07-12 04:04:43,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:43,987 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2022-07-12 04:04:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-12 04:04:43,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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 14 [2022-07-12 04:04:43,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:43,989 INFO L225 Difference]: With dead ends: 77 [2022-07-12 04:04:43,989 INFO L226 Difference]: Without dead ends: 71 [2022-07-12 04:04:43,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:04:43,991 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 109 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:43,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 64 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:04:43,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-12 04:04:43,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2022-07-12 04:04:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.4722222222222223) internal successors, (53), 36 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:43,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 53 transitions. [2022-07-12 04:04:44,000 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 53 transitions. Word has length 14 [2022-07-12 04:04:44,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:44,000 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 53 transitions. [2022-07-12 04:04:44,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 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) [2022-07-12 04:04:44,001 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 53 transitions. [2022-07-12 04:04:44,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 04:04:44,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:44,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:44,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:44,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:44,208 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:44,209 INFO L85 PathProgramCache]: Analyzing trace with hash -2067097458, now seen corresponding path program 2 times [2022-07-12 04:04:44,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:44,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257276932] [2022-07-12 04:04:44,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:44,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:44,253 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:44,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257276932] [2022-07-12 04:04:44,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257276932] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:44,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683560973] [2022-07-12 04:04:44,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:04:44,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:44,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:44,272 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) [2022-07-12 04:04:44,322 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 04:04:44,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:04:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:04:44,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:44,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:44,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683560973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:44,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:44,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-07-12 04:04:44,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604717373] [2022-07-12 04:04:44,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:44,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-12 04:04:44,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:44,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-12 04:04:44,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-07-12 04:04:44,411 INFO L87 Difference]: Start difference. First operand 37 states and 53 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-07-12 04:04:44,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:44,527 INFO L93 Difference]: Finished difference Result 74 states and 95 transitions. [2022-07-12 04:04:44,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-12 04:04:44,530 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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 14 [2022-07-12 04:04:44,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:44,531 INFO L225 Difference]: With dead ends: 74 [2022-07-12 04:04:44,531 INFO L226 Difference]: Without dead ends: 63 [2022-07-12 04:04:44,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:04:44,532 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:44,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 63 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:04:44,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-07-12 04:04:44,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 34. [2022-07-12 04:04:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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) [2022-07-12 04:04:44,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-07-12 04:04:44,541 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 14 [2022-07-12 04:04:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:44,541 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-07-12 04:04:44,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 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) [2022-07-12 04:04:44,542 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-07-12 04:04:44,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-07-12 04:04:44,542 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:44,543 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:44,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:44,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:44,759 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:44,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:44,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1219996004, now seen corresponding path program 2 times [2022-07-12 04:04:44,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:44,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869988560] [2022-07-12 04:04:44,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:44,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:44,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:44,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869988560] [2022-07-12 04:04:44,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869988560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:44,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602125836] [2022-07-12 04:04:44,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:04:44,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:44,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:44,834 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) [2022-07-12 04:04:44,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 04:04:44,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:04:44,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:44,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-12 04:04:44,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:44,894 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:44,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:44,957 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:44,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602125836] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:44,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:44,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-07-12 04:04:44,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227037830] [2022-07-12 04:04:44,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:44,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-12 04:04:44,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-12 04:04:44,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-07-12 04:04:44,960 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-07-12 04:04:45,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:45,624 INFO L93 Difference]: Finished difference Result 166 states and 229 transitions. [2022-07-12 04:04:45,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-12 04:04:45,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 [2022-07-12 04:04:45,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:45,625 INFO L225 Difference]: With dead ends: 166 [2022-07-12 04:04:45,625 INFO L226 Difference]: Without dead ends: 156 [2022-07-12 04:04:45,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2022-07-12 04:04:45,626 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 284 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:45,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 176 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:04:45,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-12 04:04:45,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 60. [2022-07-12 04:04:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4067796610169492) internal successors, (83), 59 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:45,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 83 transitions. [2022-07-12 04:04:45,636 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 83 transitions. Word has length 14 [2022-07-12 04:04:45,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:45,636 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 83 transitions. [2022-07-12 04:04:45,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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) [2022-07-12 04:04:45,636 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 83 transitions. [2022-07-12 04:04:45,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-12 04:04:45,637 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:45,637 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:45,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:45,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:45,838 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:45,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:45,838 INFO L85 PathProgramCache]: Analyzing trace with hash -555035246, now seen corresponding path program 2 times [2022-07-12 04:04:45,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:45,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086408173] [2022-07-12 04:04:45,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:45,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:45,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:45,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086408173] [2022-07-12 04:04:45,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086408173] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:45,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522811956] [2022-07-12 04:04:45,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:04:45,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:45,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:45,869 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) [2022-07-12 04:04:45,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 04:04:45,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:04:45,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-12 04:04:45,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:45,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:45,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:45,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522811956] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:45,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:45,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2022-07-12 04:04:45,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095079630] [2022-07-12 04:04:45,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:45,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 04:04:45,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:45,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 04:04:45,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:04:45,928 INFO L87 Difference]: Start difference. First operand 60 states and 83 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:45,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:45,945 INFO L93 Difference]: Finished difference Result 70 states and 96 transitions. [2022-07-12 04:04:45,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 04:04:45,945 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 [2022-07-12 04:04:45,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:45,946 INFO L225 Difference]: With dead ends: 70 [2022-07-12 04:04:45,946 INFO L226 Difference]: Without dead ends: 58 [2022-07-12 04:04:45,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-12 04:04:45,947 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:45,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 29 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:45,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-12 04:04:45,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-07-12 04:04:45,955 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) [2022-07-12 04:04:45,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 82 transitions. [2022-07-12 04:04:45,956 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 82 transitions. Word has length 15 [2022-07-12 04:04:45,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:45,956 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 82 transitions. [2022-07-12 04:04:45,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 82 transitions. [2022-07-12 04:04:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 04:04:45,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:45,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:45,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:46,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:46,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:46,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1176713020, now seen corresponding path program 3 times [2022-07-12 04:04:46,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:46,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636357447] [2022-07-12 04:04:46,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:46,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:46,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:46,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636357447] [2022-07-12 04:04:46,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636357447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:46,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936175765] [2022-07-12 04:04:46,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:04:46,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:46,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:46,245 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) [2022-07-12 04:04:46,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 04:04:46,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:04:46,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-12 04:04:46,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:46,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:46,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:46,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:46,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936175765] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:46,357 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:46,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-07-12 04:04:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240116400] [2022-07-12 04:04:46,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:46,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-12 04:04:46,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:46,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-12 04:04:46,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-07-12 04:04:46,360 INFO L87 Difference]: Start difference. First operand 58 states and 82 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-07-12 04:04:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:46,532 INFO L93 Difference]: Finished difference Result 109 states and 137 transitions. [2022-07-12 04:04:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-12 04:04:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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 16 [2022-07-12 04:04:46,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:46,533 INFO L225 Difference]: With dead ends: 109 [2022-07-12 04:04:46,533 INFO L226 Difference]: Without dead ends: 93 [2022-07-12 04:04:46,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-07-12 04:04:46,534 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:46,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 90 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:04:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-12 04:04:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 56. [2022-07-12 04:04:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4181818181818182) internal successors, (78), 55 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) [2022-07-12 04:04:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2022-07-12 04:04:46,547 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 16 [2022-07-12 04:04:46,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:46,550 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2022-07-12 04:04:46,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 13 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) [2022-07-12 04:04:46,550 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2022-07-12 04:04:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-12 04:04:46,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:46,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:46,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:46,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:46,763 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:46,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 720326044, now seen corresponding path program 3 times [2022-07-12 04:04:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:46,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691536198] [2022-07-12 04:04:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:46,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:46,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:04:46,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691536198] [2022-07-12 04:04:46,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691536198] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:46,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140347378] [2022-07-12 04:04:46,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:04:46,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:46,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:46,815 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) [2022-07-12 04:04:46,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 04:04:46,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-12 04:04:46,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-12 04:04:46,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:46,880 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:04:46,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:46,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:04:46,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140347378] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:46,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:46,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 8 [2022-07-12 04:04:46,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843846063] [2022-07-12 04:04:46,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:46,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-12 04:04:46,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:46,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-12 04:04:46,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:04:46,904 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-07-12 04:04:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:46,952 INFO L93 Difference]: Finished difference Result 77 states and 108 transitions. [2022-07-12 04:04:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-12 04:04:46,953 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-07-12 04:04:46,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:46,953 INFO L225 Difference]: With dead ends: 77 [2022-07-12 04:04:46,953 INFO L226 Difference]: Without dead ends: 73 [2022-07-12 04:04:46,954 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-07-12 04:04:46,954 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:46,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 52 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:46,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-07-12 04:04:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-07-12 04:04:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.4142857142857144) internal successors, (99), 70 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) [2022-07-12 04:04:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 99 transitions. [2022-07-12 04:04:46,967 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 99 transitions. Word has length 16 [2022-07-12 04:04:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:46,967 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 99 transitions. [2022-07-12 04:04:46,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 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) [2022-07-12 04:04:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 99 transitions. [2022-07-12 04:04:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:04:46,968 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:46,968 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:47,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:47,188 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,SelfDestructingSolverStorable10 [2022-07-12 04:04:47,188 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash 796886620, now seen corresponding path program 4 times [2022-07-12 04:04:47,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164036413] [2022-07-12 04:04:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:47,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:04:47,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:47,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164036413] [2022-07-12 04:04:47,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164036413] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:47,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143621950] [2022-07-12 04:04:47,381 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:04:47,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:47,382 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) [2022-07-12 04:04:47,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 04:04:47,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:04:47,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:47,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-12 04:04:47,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:47,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:47,924 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-12 04:04:47,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143621950] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:47,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:47,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14, 11] total 29 [2022-07-12 04:04:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868666929] [2022-07-12 04:04:47,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-12 04:04:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:47,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-12 04:04:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2022-07-12 04:04:47,926 INFO L87 Difference]: Start difference. First operand 71 states and 99 transitions. Second operand has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-07-12 04:04:49,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:49,052 INFO L93 Difference]: Finished difference Result 152 states and 189 transitions. [2022-07-12 04:04:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-12 04:04:49,053 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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 18 [2022-07-12 04:04:49,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:49,053 INFO L225 Difference]: With dead ends: 152 [2022-07-12 04:04:49,053 INFO L226 Difference]: Without dead ends: 131 [2022-07-12 04:04:49,055 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 705 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=457, Invalid=1993, Unknown=0, NotChecked=0, Total=2450 [2022-07-12 04:04:49,055 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 345 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:49,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 136 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 345 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 04:04:49,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-12 04:04:49,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 88. [2022-07-12 04:04:49,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3908045977011494) internal successors, (121), 87 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:49,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 121 transitions. [2022-07-12 04:04:49,072 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 121 transitions. Word has length 18 [2022-07-12 04:04:49,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:49,072 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 121 transitions. [2022-07-12 04:04:49,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 29 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) [2022-07-12 04:04:49,072 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 121 transitions. [2022-07-12 04:04:49,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-12 04:04:49,073 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:49,073 INFO L195 NwaCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:49,099 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:49,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:49,281 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:49,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:49,281 INFO L85 PathProgramCache]: Analyzing trace with hash -922594724, now seen corresponding path program 4 times [2022-07-12 04:04:49,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:49,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576169759] [2022-07-12 04:04:49,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:49,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:49,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:49,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576169759] [2022-07-12 04:04:49,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576169759] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:49,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94031028] [2022-07-12 04:04:49,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:04:49,331 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:49,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:49,332 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) [2022-07-12 04:04:49,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 04:04:49,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:04:49,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:49,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-12 04:04:49,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:49,403 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-12 04:04:49,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94031028] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:49,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:49,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-07-12 04:04:49,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015071359] [2022-07-12 04:04:49,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:49,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:04:49,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:49,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:04:49,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:04:49,493 INFO L87 Difference]: Start difference. First operand 88 states and 121 transitions. Second operand has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:49,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:49,643 INFO L93 Difference]: Finished difference Result 115 states and 150 transitions. [2022-07-12 04:04:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-12 04:04:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-12 04:04:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:49,656 INFO L225 Difference]: With dead ends: 115 [2022-07-12 04:04:49,656 INFO L226 Difference]: Without dead ends: 95 [2022-07-12 04:04:49,657 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2022-07-12 04:04:49,657 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:49,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 74 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:04:49,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-07-12 04:04:49,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2022-07-12 04:04:49,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.380281690140845) internal successors, (98), 71 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:49,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 98 transitions. [2022-07-12 04:04:49,668 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 98 transitions. Word has length 18 [2022-07-12 04:04:49,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:49,668 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 98 transitions. [2022-07-12 04:04:49,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:49,669 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 98 transitions. [2022-07-12 04:04:49,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:04:49,669 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:49,670 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:49,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:49,891 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,SelfDestructingSolverStorable12 [2022-07-12 04:04:49,892 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1610400402, now seen corresponding path program 5 times [2022-07-12 04:04:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:49,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18634362] [2022-07-12 04:04:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:49,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:04:49,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:49,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18634362] [2022-07-12 04:04:49,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18634362] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:49,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95974940] [2022-07-12 04:04:49,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:04:49,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:49,950 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) [2022-07-12 04:04:49,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 04:04:49,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-12 04:04:49,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:49,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-12 04:04:49,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:04:50,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:04:50,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95974940] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:50,067 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:50,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 11 [2022-07-12 04:04:50,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984659233] [2022-07-12 04:04:50,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:50,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-12 04:04:50,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:50,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-12 04:04:50,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:04:50,069 INFO L87 Difference]: Start difference. First operand 72 states and 98 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:50,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:50,118 INFO L93 Difference]: Finished difference Result 96 states and 133 transitions. [2022-07-12 04:04:50,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-12 04:04:50,119 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 04:04:50,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:50,119 INFO L225 Difference]: With dead ends: 96 [2022-07-12 04:04:50,119 INFO L226 Difference]: Without dead ends: 92 [2022-07-12 04:04:50,119 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-07-12 04:04:50,120 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 22 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:50,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 76 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-12 04:04:50,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-12 04:04:50,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 87. [2022-07-12 04:04:50,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.3837209302325582) internal successors, (119), 86 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:50,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 119 transitions. [2022-07-12 04:04:50,129 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 119 transitions. Word has length 19 [2022-07-12 04:04:50,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:50,129 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 119 transitions. [2022-07-12 04:04:50,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 119 transitions. [2022-07-12 04:04:50,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-12 04:04:50,130 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:50,130 INFO L195 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:50,148 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:50,345 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,SelfDestructingSolverStorable13 [2022-07-12 04:04:50,345 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:50,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1793951343, now seen corresponding path program 5 times [2022-07-12 04:04:50,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:50,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852546144] [2022-07-12 04:04:50,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:50,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:50,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:50,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852546144] [2022-07-12 04:04:50,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852546144] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:50,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640457813] [2022-07-12 04:04:50,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-12 04:04:50,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:50,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:50,435 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) [2022-07-12 04:04:50,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 04:04:50,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-12 04:04:50,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:50,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-12 04:04:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:50,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:04:50,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640457813] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:50,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:50,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-12 04:04:50,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317244912] [2022-07-12 04:04:50,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:50,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-12 04:04:50,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:50,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-12 04:04:50,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2022-07-12 04:04:50,627 INFO L87 Difference]: Start difference. First operand 87 states and 119 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:55,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:55,009 INFO L93 Difference]: Finished difference Result 362 states and 466 transitions. [2022-07-12 04:04:55,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-12 04:04:55,009 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-12 04:04:55,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:55,010 INFO L225 Difference]: With dead ends: 362 [2022-07-12 04:04:55,011 INFO L226 Difference]: Without dead ends: 337 [2022-07-12 04:04:55,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1757 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2022-07-12 04:04:55,013 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 514 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:55,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [514 Valid, 423 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 04:04:55,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-07-12 04:04:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 104. [2022-07-12 04:04:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.3786407766990292) internal successors, (142), 103 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 142 transitions. [2022-07-12 04:04:55,039 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 142 transitions. Word has length 19 [2022-07-12 04:04:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:55,039 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 142 transitions. [2022-07-12 04:04:55,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:55,040 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 142 transitions. [2022-07-12 04:04:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-12 04:04:55,040 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:55,040 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:55,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-12 04:04:55,255 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,SelfDestructingSolverStorable14 [2022-07-12 04:04:55,255 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:55,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:55,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1979130930, now seen corresponding path program 6 times [2022-07-12 04:04:55,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:55,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847085798] [2022-07-12 04:04:55,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:55,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:55,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:55,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:04:55,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:55,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847085798] [2022-07-12 04:04:55,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847085798] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:55,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278887667] [2022-07-12 04:04:55,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:04:55,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:55,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:55,353 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) [2022-07-12 04:04:55,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-12 04:04:55,379 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-12 04:04:55,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:04:55,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:04:55,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:55,430 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:04:55,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:55,520 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:04:55,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278887667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:55,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:55,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2022-07-12 04:04:55,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391638280] [2022-07-12 04:04:55,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:55,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-12 04:04:55,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:55,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-12 04:04:55,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-07-12 04:04:55,521 INFO L87 Difference]: Start difference. First operand 104 states and 142 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2022-07-12 04:04:55,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:04:55,808 INFO L93 Difference]: Finished difference Result 185 states and 226 transitions. [2022-07-12 04:04:55,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-12 04:04:55,808 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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 20 [2022-07-12 04:04:55,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:04:55,809 INFO L225 Difference]: With dead ends: 185 [2022-07-12 04:04:55,809 INFO L226 Difference]: Without dead ends: 166 [2022-07-12 04:04:55,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:04:55,809 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:04:55,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 212 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:04:55,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-07-12 04:04:55,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 100. [2022-07-12 04:04:55,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.3535353535353536) internal successors, (134), 99 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:04:55,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 134 transitions. [2022-07-12 04:04:55,827 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 134 transitions. Word has length 20 [2022-07-12 04:04:55,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:04:55,827 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 134 transitions. [2022-07-12 04:04:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 18 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) [2022-07-12 04:04:55,827 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 134 transitions. [2022-07-12 04:04:55,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:04:55,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:04:55,827 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:04:55,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-12 04:04:56,046 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,SelfDestructingSolverStorable15 [2022-07-12 04:04:56,046 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:04:56,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:04:56,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1987539476, now seen corresponding path program 7 times [2022-07-12 04:04:56,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:04:56,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637393783] [2022-07-12 04:04:56,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:04:56,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:04:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-12 04:04:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:04:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637393783] [2022-07-12 04:04:56,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637393783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:04:56,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621232974] [2022-07-12 04:04:56,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:04:56,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:04:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:04:56,268 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) [2022-07-12 04:04:56,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-12 04:04:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:04:56,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-12 04:04:56,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:04:57,449 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:57,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:04:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:04:58,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621232974] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:04:58,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:04:58,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 18] total 40 [2022-07-12 04:04:58,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905698594] [2022-07-12 04:04:58,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:04:58,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-12 04:04:58,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:04:58,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-12 04:04:58,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1240, Unknown=0, NotChecked=0, Total=1560 [2022-07-12 04:04:58,263 INFO L87 Difference]: Start difference. First operand 100 states and 134 transitions. Second operand has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:03,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:05:03,586 INFO L93 Difference]: Finished difference Result 198 states and 248 transitions. [2022-07-12 04:05:03,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-12 04:05:03,586 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-12 04:05:03,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:05:03,587 INFO L225 Difference]: With dead ends: 198 [2022-07-12 04:05:03,587 INFO L226 Difference]: Without dead ends: 179 [2022-07-12 04:05:03,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 13 SyntacticMatches, 6 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1701 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1229, Invalid=4777, Unknown=0, NotChecked=0, Total=6006 [2022-07-12 04:05:03,589 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 257 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:05:03,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 157 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 651 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-07-12 04:05:03,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-07-12 04:05:03,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 124. [2022-07-12 04:05:03,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3414634146341464) internal successors, (165), 123 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:03,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 165 transitions. [2022-07-12 04:05:03,605 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 165 transitions. Word has length 22 [2022-07-12 04:05:03,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:05:03,606 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 165 transitions. [2022-07-12 04:05:03,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:03,606 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 165 transitions. [2022-07-12 04:05:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:05:03,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:05:03,606 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:05:03,627 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-12 04:05:03,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:03,828 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:05:03,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:05:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1562904434, now seen corresponding path program 6 times [2022-07-12 04:05:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:05:03,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354736091] [2022-07-12 04:05:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:05:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:05:03,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:05:03,906 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:05:03,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:05:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354736091] [2022-07-12 04:05:03,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354736091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:05:03,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099029896] [2022-07-12 04:05:03,907 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-12 04:05:03,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:03,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:05:03,924 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) [2022-07-12 04:05:03,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-12 04:05:04,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-12 04:05:04,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:05:04,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:05:04,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:05:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:05:04,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:05:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-12 04:05:04,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099029896] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:05:04,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:05:04,217 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-07-12 04:05:04,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999123612] [2022-07-12 04:05:04,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:05:04,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-12 04:05:04,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:05:04,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-12 04:05:04,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-07-12 04:05:04,218 INFO L87 Difference]: Start difference. First operand 124 states and 165 transitions. Second operand has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:04,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:05:04,492 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2022-07-12 04:05:04,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-12 04:05:04,492 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2022-07-12 04:05:04,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:05:04,493 INFO L225 Difference]: With dead ends: 165 [2022-07-12 04:05:04,493 INFO L226 Difference]: Without dead ends: 140 [2022-07-12 04:05:04,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2022-07-12 04:05:04,494 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 139 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:05:04,494 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 94 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 04:05:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-12 04:05:04,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 103. [2022-07-12 04:05:04,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2022-07-12 04:05:04,513 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 22 [2022-07-12 04:05:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:05:04,513 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2022-07-12 04:05:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7272727272727273) internal successors, (38), 22 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2022-07-12 04:05:04,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-12 04:05:04,513 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:05:04,514 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:05:04,530 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-12 04:05:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-12 04:05:04,720 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:05:04,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:05:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1894811100, now seen corresponding path program 7 times [2022-07-12 04:05:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:05:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774557563] [2022-07-12 04:05:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:05:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:05:04,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:05:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:04,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:05:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774557563] [2022-07-12 04:05:04,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774557563] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:05:04,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392010681] [2022-07-12 04:05:04,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-12 04:05:04,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:04,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:05:04,798 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) [2022-07-12 04:05:04,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-12 04:05:04,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:05:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-12 04:05:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:05:04,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:04,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:05:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392010681] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:05:04,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:05:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 14 [2022-07-12 04:05:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684083914] [2022-07-12 04:05:04,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:05:04,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-12 04:05:04,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:05:04,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-12 04:05:04,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:05:04,915 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:05,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:05:05,010 INFO L93 Difference]: Finished difference Result 134 states and 182 transitions. [2022-07-12 04:05:05,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-12 04:05:05,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-12 04:05:05,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:05:05,011 INFO L225 Difference]: With dead ends: 134 [2022-07-12 04:05:05,011 INFO L226 Difference]: Without dead ends: 130 [2022-07-12 04:05:05,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-07-12 04:05:05,012 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 49 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:05:05,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 124 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:05:05,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-07-12 04:05:05,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 122. [2022-07-12 04:05:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.3471074380165289) internal successors, (163), 121 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:05,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 163 transitions. [2022-07-12 04:05:05,027 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 163 transitions. Word has length 22 [2022-07-12 04:05:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:05:05,027 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 163 transitions. [2022-07-12 04:05:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:05,028 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 163 transitions. [2022-07-12 04:05:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 04:05:05,028 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:05:05,028 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:05:05,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-12 04:05:05,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:05,245 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:05:05,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:05:05,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1912260034, now seen corresponding path program 8 times [2022-07-12 04:05:05,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:05:05,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481590272] [2022-07-12 04:05:05,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:05:05,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:05:05,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:05:05,325 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:05,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:05:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481590272] [2022-07-12 04:05:05,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481590272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:05:05,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290137483] [2022-07-12 04:05:05,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:05:05,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:05,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:05:05,327 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) [2022-07-12 04:05:05,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-12 04:05:05,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:05:05,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:05:05,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-12 04:05:05,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:05:05,444 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:05,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:05:05,607 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 04:05:05,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290137483] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:05:05,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:05:05,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 27 [2022-07-12 04:05:05,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870998384] [2022-07-12 04:05:05,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:05:05,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-12 04:05:05,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:05:05,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-12 04:05:05,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2022-07-12 04:05:05,608 INFO L87 Difference]: Start difference. First operand 122 states and 163 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) [2022-07-12 04:05:06,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:05:06,582 INFO L93 Difference]: Finished difference Result 274 states and 331 transitions. [2022-07-12 04:05:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-12 04:05:06,582 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 23 [2022-07-12 04:05:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:05:06,583 INFO L225 Difference]: With dead ends: 274 [2022-07-12 04:05:06,583 INFO L226 Difference]: Without dead ends: 247 [2022-07-12 04:05:06,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=489, Invalid=1863, Unknown=0, NotChecked=0, Total=2352 [2022-07-12 04:05:06,584 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 235 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:05:06,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 214 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:05:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-12 04:05:06,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 139. [2022-07-12 04:05:06,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.3115942028985508) internal successors, (181), 138 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:05:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 181 transitions. [2022-07-12 04:05:06,608 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 181 transitions. Word has length 23 [2022-07-12 04:05:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:05:06,608 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 181 transitions. [2022-07-12 04:05:06,608 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) [2022-07-12 04:05:06,609 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 181 transitions. [2022-07-12 04:05:06,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-12 04:05:06,609 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:05:06,609 INFO L195 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:05:06,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-12 04:05:06,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:06,809 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:05:06,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:05:06,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1236870529, now seen corresponding path program 3 times [2022-07-12 04:05:06,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:05:06,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433961587] [2022-07-12 04:05:06,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:05:06,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:05:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:05:06,978 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:05:06,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:05:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433961587] [2022-07-12 04:05:06,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433961587] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:05:06,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432067842] [2022-07-12 04:05:06,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:05:06,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:05:06,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:05:06,980 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) [2022-07-12 04:05:06,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-12 04:05:07,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-12 04:05:07,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:05:07,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-12 04:05:07,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:05:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:05:07,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:05:07,509 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:05:07,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432067842] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:05:07,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:05:07,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2022-07-12 04:05:07,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31831096] [2022-07-12 04:05:07,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:05:07,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-12 04:05:07,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:05:07,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-12 04:05:07,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2022-07-12 04:05:07,510 INFO L87 Difference]: Start difference. First operand 139 states and 181 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2022-07-12 04:06:17,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:06:17,843 INFO L93 Difference]: Finished difference Result 847 states and 1132 transitions. [2022-07-12 04:06:17,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-07-12 04:06:17,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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 23 [2022-07-12 04:06:17,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:06:17,846 INFO L225 Difference]: With dead ends: 847 [2022-07-12 04:06:17,846 INFO L226 Difference]: Without dead ends: 807 [2022-07-12 04:06:17,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1703 ImplicationChecksByTransitivity, 67.4s TimeCoverageRelationStatistics Valid=2101, Invalid=4704, Unknown=1, NotChecked=0, Total=6806 [2022-07-12 04:06:17,848 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1667 mSDsluCounter, 1000 mSDsCounter, 0 mSdLazyCounter, 1331 mSolverCounterSat, 880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 2211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 880 IncrementalHoareTripleChecker+Valid, 1331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-12 04:06:17,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 1064 Invalid, 2211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [880 Valid, 1331 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-12 04:06:17,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2022-07-12 04:06:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 201. [2022-07-12 04:06:17,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.365) internal successors, (273), 200 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:17,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 273 transitions. [2022-07-12 04:06:17,885 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 273 transitions. Word has length 23 [2022-07-12 04:06:17,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:06:17,885 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 273 transitions. [2022-07-12 04:06:17,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 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) [2022-07-12 04:06:17,885 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 273 transitions. [2022-07-12 04:06:17,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-12 04:06:17,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:06:17,886 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:06:17,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-12 04:06:18,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:18,090 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:06:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:06:18,090 INFO L85 PathProgramCache]: Analyzing trace with hash -510369070, now seen corresponding path program 9 times [2022-07-12 04:06:18,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:06:18,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398727624] [2022-07-12 04:06:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:06:18,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:06:18,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:06:18,186 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:06:18,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:06:18,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398727624] [2022-07-12 04:06:18,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398727624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:06:18,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97564272] [2022-07-12 04:06:18,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:06:18,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:18,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:06:18,188 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) [2022-07-12 04:06:18,189 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-12 04:06:18,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:06:18,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:06:18,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-12 04:06:18,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:06:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:06:18,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:06:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-12 04:06:18,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97564272] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:06:18,341 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:06:18,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 8] total 17 [2022-07-12 04:06:18,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116345567] [2022-07-12 04:06:18,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:06:18,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-12 04:06:18,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:06:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-12 04:06:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:06:18,342 INFO L87 Difference]: Start difference. First operand 201 states and 273 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:18,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:06:18,483 INFO L93 Difference]: Finished difference Result 248 states and 342 transitions. [2022-07-12 04:06:18,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-12 04:06:18,483 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-12 04:06:18,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:06:18,484 INFO L225 Difference]: With dead ends: 248 [2022-07-12 04:06:18,484 INFO L226 Difference]: Without dead ends: 244 [2022-07-12 04:06:18,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2022-07-12 04:06:18,485 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 41 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 04:06:18,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 148 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 04:06:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-07-12 04:06:18,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 234. [2022-07-12 04:06:18,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 1.3690987124463518) internal successors, (319), 233 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:18,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 319 transitions. [2022-07-12 04:06:18,530 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 319 transitions. Word has length 25 [2022-07-12 04:06:18,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:06:18,531 INFO L495 AbstractCegarLoop]: Abstraction has 234 states and 319 transitions. [2022-07-12 04:06:18,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:18,531 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 319 transitions. [2022-07-12 04:06:18,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:06:18,532 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:06:18,532 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:06:18,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-12 04:06:18,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:18,735 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:06:18,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:06:18,736 INFO L85 PathProgramCache]: Analyzing trace with hash -955275428, now seen corresponding path program 8 times [2022-07-12 04:06:18,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:06:18,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567606245] [2022-07-12 04:06:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:06:18,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:06:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:06:19,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 04:06:19,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:06:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567606245] [2022-07-12 04:06:19,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567606245] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:06:19,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457184459] [2022-07-12 04:06:19,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-12 04:06:19,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:19,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:06:19,082 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) [2022-07-12 04:06:19,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-12 04:06:19,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-12 04:06:19,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:06:19,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-12 04:06:19,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:06:19,728 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:06:19,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:06:20,492 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 04:06:20,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457184459] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:06:20,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:06:20,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 21, 16] total 44 [2022-07-12 04:06:20,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874999827] [2022-07-12 04:06:20,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:06:20,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-12 04:06:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:06:20,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-12 04:06:20,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2022-07-12 04:06:20,494 INFO L87 Difference]: Start difference. First operand 234 states and 319 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:24,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:06:24,307 INFO L93 Difference]: Finished difference Result 343 states and 431 transitions. [2022-07-12 04:06:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-12 04:06:24,307 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 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 [2022-07-12 04:06:24,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:06:24,308 INFO L225 Difference]: With dead ends: 343 [2022-07-12 04:06:24,309 INFO L226 Difference]: Without dead ends: 318 [2022-07-12 04:06:24,310 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=801, Invalid=3621, Unknown=0, NotChecked=0, Total=4422 [2022-07-12 04:06:24,310 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 637 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 637 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-12 04:06:24,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 142 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-12 04:06:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-12 04:06:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 232. [2022-07-12 04:06:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.3722943722943723) internal successors, (317), 231 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 317 transitions. [2022-07-12 04:06:24,366 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 317 transitions. Word has length 26 [2022-07-12 04:06:24,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:06:24,366 INFO L495 AbstractCegarLoop]: Abstraction has 232 states and 317 transitions. [2022-07-12 04:06:24,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 44 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 317 transitions. [2022-07-12 04:06:24,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-12 04:06:24,367 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:06:24,367 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:06:24,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-12 04:06:24,579 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,SelfDestructingSolverStorable22 [2022-07-12 04:06:24,579 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:06:24,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:06:24,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1118982868, now seen corresponding path program 9 times [2022-07-12 04:06:24,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:06:24,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784358808] [2022-07-12 04:06:24,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:06:24,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:06:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:06:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 04:06:24,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:06:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784358808] [2022-07-12 04:06:24,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784358808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:06:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780410727] [2022-07-12 04:06:24,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-12 04:06:24,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:24,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:06:24,687 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) [2022-07-12 04:06:24,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-12 04:06:24,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-12 04:06:24,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:06:24,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-12 04:06:24,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:06:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-12 04:06:24,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:06:24,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-12 04:06:24,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780410727] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:06:24,963 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:06:24,963 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2022-07-12 04:06:24,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957625170] [2022-07-12 04:06:24,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:06:24,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-12 04:06:24,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:06:24,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-12 04:06:24,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-07-12 04:06:24,964 INFO L87 Difference]: Start difference. First operand 232 states and 317 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 04:06:25,733 INFO L93 Difference]: Finished difference Result 398 states and 486 transitions. [2022-07-12 04:06:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-12 04:06:25,733 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-12 04:06:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 04:06:25,734 INFO L225 Difference]: With dead ends: 398 [2022-07-12 04:06:25,734 INFO L226 Difference]: Without dead ends: 333 [2022-07-12 04:06:25,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2022-07-12 04:06:25,735 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 95 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 409 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-12 04:06:25,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 409 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-12 04:06:25,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-07-12 04:06:25,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 217. [2022-07-12 04:06:25,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.3425925925925926) internal successors, (290), 216 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 290 transitions. [2022-07-12 04:06:25,771 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 290 transitions. Word has length 26 [2022-07-12 04:06:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 04:06:25,771 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 290 transitions. [2022-07-12 04:06:25,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 04:06:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 290 transitions. [2022-07-12 04:06:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-12 04:06:25,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 04:06:25,772 INFO L195 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 04:06:25,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-12 04:06:25,975 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,SelfDestructingSolverStorable23 [2022-07-12 04:06:25,975 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 04:06:25,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 04:06:25,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1509115665, now seen corresponding path program 10 times [2022-07-12 04:06:25,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 04:06:25,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324914140] [2022-07-12 04:06:25,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 04:06:25,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 04:06:25,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 04:06:26,174 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:06:26,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 04:06:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324914140] [2022-07-12 04:06:26,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324914140] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 04:06:26,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825920139] [2022-07-12 04:06:26,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-12 04:06:26,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 04:06:26,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 04:06:26,176 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) [2022-07-12 04:06:26,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-12 04:06:26,207 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-12 04:06:26,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-12 04:06:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-12 04:06:26,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 04:06:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:06:26,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 04:06:26,669 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-12 04:06:26,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825920139] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 04:06:26,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 04:06:26,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2022-07-12 04:06:26,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098214388] [2022-07-12 04:06:26,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 04:06:26,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-12 04:06:26,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 04:06:26,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-12 04:06:26,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2022-07-12 04:06:26,671 INFO L87 Difference]: Start difference. First operand 217 states and 290 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 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) [2022-07-12 04:06:47,499 WARN L233 SmtUtils]: Spent 6.96s 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) [2022-07-12 04:07:01,218 WARN L233 SmtUtils]: Spent 10.44s on a formula simplification that was a NOOP. DAG size: 68 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:07:21,185 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification that was a NOOP. DAG size: 65 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:07:35,733 WARN L233 SmtUtils]: Spent 9.74s 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) [2022-07-12 04:08:12,427 WARN L233 SmtUtils]: Spent 7.80s on a formula simplification that was a NOOP. DAG size: 66 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-12 04:09:21,385 WARN L233 SmtUtils]: Spent 6.76s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)