./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label16.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 b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:11:32,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:11:32,186 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:11:32,238 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:11:32,239 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:11:32,240 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:11:32,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:11:32,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:11:32,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:11:32,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:11:32,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:11:32,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:11:32,251 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:11:32,252 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:11:32,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:11:32,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:11:32,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:11:32,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:11:32,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:11:32,259 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:11:32,260 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:11:32,261 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:11:32,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:11:32,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:11:32,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:11:32,266 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:11:32,269 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:11:32,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:11:32,270 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:11:32,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:11:32,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:11:32,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:11:32,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:11:32,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:11:32,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:11:32,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:11:32,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:11:32,275 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:11:32,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:11:32,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:11:32,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:11:32,277 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:11:32,278 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:11:32,297 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:11:32,297 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:11:32,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:11:32,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:11:32,298 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:11:32,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:11:32,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:11:32,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:11:32,299 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:11:32,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:11:32,300 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:11:32,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:11:32,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:11:32,300 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:11:32,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:11:32,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:11:32,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:11:32,301 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:11:32,301 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:11:32,302 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:11:32,302 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:11:32,302 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:11:32,302 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:11:32,302 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:11:32,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:32,303 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:11:32,303 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:11:32,303 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:11:32,303 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:11:32,303 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:11:32,304 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:11:32,304 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:11:32,304 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:11:32,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3ca7ac045e48d38881d30e6a93ef4c7dacfed0b5d9d8607f5d28bf43102d8b7 [2022-07-19 11:11:32,501 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:11:32,524 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:11:32,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:11:32,527 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:11:32,528 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:11:32,529 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2022-07-19 11:11:32,573 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f9eebce/42e4605f886d4b7f9de84d24ae1e0d58/FLAG581e28810 [2022-07-19 11:11:33,071 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:11:33,071 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label16.c [2022-07-19 11:11:33,097 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f9eebce/42e4605f886d4b7f9de84d24ae1e0d58/FLAG581e28810 [2022-07-19 11:11:33,607 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86f9eebce/42e4605f886d4b7f9de84d24ae1e0d58 [2022-07-19 11:11:33,609 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:11:33,610 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:11:33,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:33,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:11:33,615 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:11:33,615 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:33" (1/1) ... [2022-07-19 11:11:33,616 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4f5e1d4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:33, skipping insertion in model container [2022-07-19 11:11:33,616 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:11:33" (1/1) ... [2022-07-19 11:11:33,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:11:33,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:11:34,053 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/eca-rers2012/Problem03_label16.c[56490,56503] [2022-07-19 11:11:34,075 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:34,083 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:11:34,227 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/eca-rers2012/Problem03_label16.c[56490,56503] [2022-07-19 11:11:34,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:11:34,252 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:11:34,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34 WrapperNode [2022-07-19 11:11:34,253 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:11:34,254 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:34,254 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:11:34,254 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:11:34,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,288 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,346 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:11:34,346 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:11:34,347 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:11:34,347 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:11:34,347 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:11:34,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,409 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,416 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:11:34,425 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:11:34,425 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:11:34,426 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:11:34,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (1/1) ... [2022-07-19 11:11:34,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:11:34,439 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:34,450 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 11:11:34,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 11:11:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:11:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:11:34,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:11:34,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:11:34,564 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:11:34,565 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:11:35,726 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:11:35,739 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:11:35,739 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:11:35,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:35 BoogieIcfgContainer [2022-07-19 11:11:35,742 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:11:35,745 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:11:35,745 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:11:35,747 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:11:35,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:11:33" (1/3) ... [2022-07-19 11:11:35,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da7fe8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:35, skipping insertion in model container [2022-07-19 11:11:35,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:11:34" (2/3) ... [2022-07-19 11:11:35,748 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2da7fe8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:11:35, skipping insertion in model container [2022-07-19 11:11:35,748 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:11:35" (3/3) ... [2022-07-19 11:11:35,750 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label16.c [2022-07-19 11:11:35,760 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:11:35,760 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:11:35,809 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:11:35,815 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@7a8b4b50, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@453954e1 [2022-07-19 11:11:35,816 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:11:35,820 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:35,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-07-19 11:11:35,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:35,835 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:35,835 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:35,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash 812227147, now seen corresponding path program 1 times [2022-07-19 11:11:35,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:35,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919420783] [2022-07-19 11:11:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:35,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:36,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:36,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:36,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919420783] [2022-07-19 11:11:36,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919420783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:36,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:36,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968268426] [2022-07-19 11:11:36,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:36,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:36,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:36,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:36,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:36,269 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 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) [2022-07-19 11:11:37,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:37,044 INFO L93 Difference]: Finished difference Result 833 states and 1474 transitions. [2022-07-19 11:11:37,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:37,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 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) Word has length 165 [2022-07-19 11:11:37,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:37,055 INFO L225 Difference]: With dead ends: 833 [2022-07-19 11:11:37,055 INFO L226 Difference]: Without dead ends: 454 [2022-07-19 11:11:37,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:37,060 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:37,061 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 163 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:37,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-07-19 11:11:37,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 450. [2022-07-19 11:11:37,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 1.55902004454343) internal successors, (700), 449 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:37,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 700 transitions. [2022-07-19 11:11:37,105 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 700 transitions. Word has length 165 [2022-07-19 11:11:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:37,105 INFO L495 AbstractCegarLoop]: Abstraction has 450 states and 700 transitions. [2022-07-19 11:11:37,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 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) [2022-07-19 11:11:37,106 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 700 transitions. [2022-07-19 11:11:37,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-19 11:11:37,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:37,108 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:37,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:11:37,109 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:37,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:37,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1242118081, now seen corresponding path program 1 times [2022-07-19 11:11:37,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:37,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470910078] [2022-07-19 11:11:37,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:37,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:37,206 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:37,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:37,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470910078] [2022-07-19 11:11:37,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470910078] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:37,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:37,208 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:37,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510180788] [2022-07-19 11:11:37,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:37,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:37,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:37,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:37,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:37,210 INFO L87 Difference]: Start difference. First operand 450 states and 700 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:37,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:37,824 INFO L93 Difference]: Finished difference Result 1337 states and 2085 transitions. [2022-07-19 11:11:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2022-07-19 11:11:37,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:37,835 INFO L225 Difference]: With dead ends: 1337 [2022-07-19 11:11:37,835 INFO L226 Difference]: Without dead ends: 889 [2022-07-19 11:11:37,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:37,838 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 285 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 678 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:37,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 104 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 678 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2022-07-19 11:11:37,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 885. [2022-07-19 11:11:37,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 1.5429864253393666) internal successors, (1364), 884 states have internal predecessors, (1364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:37,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1364 transitions. [2022-07-19 11:11:37,881 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1364 transitions. Word has length 171 [2022-07-19 11:11:37,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:37,882 INFO L495 AbstractCegarLoop]: Abstraction has 885 states and 1364 transitions. [2022-07-19 11:11:37,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 2 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1364 transitions. [2022-07-19 11:11:37,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-19 11:11:37,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:37,887 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:37,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:11:37,887 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash -251784012, now seen corresponding path program 1 times [2022-07-19 11:11:37,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124761484] [2022-07-19 11:11:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:37,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:37,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:37,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124761484] [2022-07-19 11:11:37,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124761484] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:37,972 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:37,972 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:37,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628251302] [2022-07-19 11:11:37,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:37,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:37,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:37,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:37,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:37,975 INFO L87 Difference]: Start difference. First operand 885 states and 1364 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:38,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:38,502 INFO L93 Difference]: Finished difference Result 2599 states and 4012 transitions. [2022-07-19 11:11:38,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:38,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-07-19 11:11:38,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:38,508 INFO L225 Difference]: With dead ends: 2599 [2022-07-19 11:11:38,508 INFO L226 Difference]: Without dead ends: 1716 [2022-07-19 11:11:38,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:38,515 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 258 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:38,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [258 Valid, 134 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1716 states. [2022-07-19 11:11:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1716 to 1714. [2022-07-19 11:11:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.4687682428488034) internal successors, (2516), 1713 states have internal predecessors, (2516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:38,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2516 transitions. [2022-07-19 11:11:38,545 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2516 transitions. Word has length 178 [2022-07-19 11:11:38,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:38,546 INFO L495 AbstractCegarLoop]: Abstraction has 1714 states and 2516 transitions. [2022-07-19 11:11:38,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 3 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:38,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2516 transitions. [2022-07-19 11:11:38,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-07-19 11:11:38,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:38,551 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:38,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:11:38,551 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:38,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:38,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1837090703, now seen corresponding path program 1 times [2022-07-19 11:11:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:38,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411432017] [2022-07-19 11:11:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:38,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:38,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:38,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411432017] [2022-07-19 11:11:38,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411432017] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:38,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:38,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576799890] [2022-07-19 11:11:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:38,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:38,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:38,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:38,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:38,635 INFO L87 Difference]: Start difference. First operand 1714 states and 2516 transitions. Second operand has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:39,169 INFO L93 Difference]: Finished difference Result 4665 states and 6865 transitions. [2022-07-19 11:11:39,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:39,170 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2022-07-19 11:11:39,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:39,178 INFO L225 Difference]: With dead ends: 4665 [2022-07-19 11:11:39,178 INFO L226 Difference]: Without dead ends: 2953 [2022-07-19 11:11:39,180 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:39,180 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:39,181 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 167 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:39,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2953 states. [2022-07-19 11:11:39,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2953 to 2949. [2022-07-19 11:11:39,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2949 states, 2948 states have (on average 1.4189280868385346) internal successors, (4183), 2948 states have internal predecessors, (4183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2949 states to 2949 states and 4183 transitions. [2022-07-19 11:11:39,224 INFO L78 Accepts]: Start accepts. Automaton has 2949 states and 4183 transitions. Word has length 178 [2022-07-19 11:11:39,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:39,224 INFO L495 AbstractCegarLoop]: Abstraction has 2949 states and 4183 transitions. [2022-07-19 11:11:39,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.333333333333336) internal successors, (178), 2 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 2949 states and 4183 transitions. [2022-07-19 11:11:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-19 11:11:39,229 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:39,229 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:39,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:11:39,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:39,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1745992384, now seen corresponding path program 1 times [2022-07-19 11:11:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:39,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701163864] [2022-07-19 11:11:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:39,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:39,285 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 11:11:39,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:39,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701163864] [2022-07-19 11:11:39,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701163864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:39,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:39,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:39,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672952233] [2022-07-19 11:11:39,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:39,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:39,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:39,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:39,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:39,287 INFO L87 Difference]: Start difference. First operand 2949 states and 4183 transitions. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:39,864 INFO L93 Difference]: Finished difference Result 8575 states and 12210 transitions. [2022-07-19 11:11:39,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:39,865 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 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 179 [2022-07-19 11:11:39,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:39,880 INFO L225 Difference]: With dead ends: 8575 [2022-07-19 11:11:39,880 INFO L226 Difference]: Without dead ends: 5831 [2022-07-19 11:11:39,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:39,885 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:39,885 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:39,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5831 states. [2022-07-19 11:11:39,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5831 to 5795. [2022-07-19 11:11:39,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 1.387814981014843) internal successors, (8041), 5794 states have internal predecessors, (8041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 8041 transitions. [2022-07-19 11:11:39,975 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 8041 transitions. Word has length 179 [2022-07-19 11:11:39,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:39,976 INFO L495 AbstractCegarLoop]: Abstraction has 5795 states and 8041 transitions. [2022-07-19 11:11:39,976 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 2 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 8041 transitions. [2022-07-19 11:11:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-07-19 11:11:39,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:39,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:39,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:11:39,985 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:39,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:39,986 INFO L85 PathProgramCache]: Analyzing trace with hash -265270091, now seen corresponding path program 1 times [2022-07-19 11:11:39,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:39,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860886850] [2022-07-19 11:11:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:39,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:40,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:11:40,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:40,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860886850] [2022-07-19 11:11:40,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860886850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:40,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:40,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:40,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821788271] [2022-07-19 11:11:40,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:40,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:40,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:40,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:40,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:40,073 INFO L87 Difference]: Start difference. First operand 5795 states and 8041 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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) [2022-07-19 11:11:40,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:40,735 INFO L93 Difference]: Finished difference Result 17290 states and 23998 transitions. [2022-07-19 11:11:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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) Word has length 186 [2022-07-19 11:11:40,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:40,767 INFO L225 Difference]: With dead ends: 17290 [2022-07-19 11:11:40,767 INFO L226 Difference]: Without dead ends: 11497 [2022-07-19 11:11:40,776 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:40,777 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:40,777 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 415 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11497 states. [2022-07-19 11:11:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11497 to 11490. [2022-07-19 11:11:40,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11490 states, 11489 states have (on average 1.298807555052659) internal successors, (14922), 11489 states have internal predecessors, (14922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11490 states to 11490 states and 14922 transitions. [2022-07-19 11:11:40,963 INFO L78 Accepts]: Start accepts. Automaton has 11490 states and 14922 transitions. Word has length 186 [2022-07-19 11:11:40,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:40,963 INFO L495 AbstractCegarLoop]: Abstraction has 11490 states and 14922 transitions. [2022-07-19 11:11:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 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) [2022-07-19 11:11:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 11490 states and 14922 transitions. [2022-07-19 11:11:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-07-19 11:11:40,975 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:40,976 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:40,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:11:40,976 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:40,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:40,977 INFO L85 PathProgramCache]: Analyzing trace with hash 715312805, now seen corresponding path program 1 times [2022-07-19 11:11:40,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:40,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567876205] [2022-07-19 11:11:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:40,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:41,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:41,031 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:41,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:41,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567876205] [2022-07-19 11:11:41,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567876205] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:41,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:41,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:41,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180345128] [2022-07-19 11:11:41,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:41,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:41,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:41,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:41,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:41,033 INFO L87 Difference]: Start difference. First operand 11490 states and 14922 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:41,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:41,719 INFO L93 Difference]: Finished difference Result 30543 states and 39619 transitions. [2022-07-19 11:11:41,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:41,720 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 193 [2022-07-19 11:11:41,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:41,755 INFO L225 Difference]: With dead ends: 30543 [2022-07-19 11:11:41,755 INFO L226 Difference]: Without dead ends: 19867 [2022-07-19 11:11:41,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:41,770 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:41,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 162 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2022-07-19 11:11:41,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 19849. [2022-07-19 11:11:41,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19849 states, 19848 states have (on average 1.2677851672712617) internal successors, (25163), 19848 states have internal predecessors, (25163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19849 states to 19849 states and 25163 transitions. [2022-07-19 11:11:42,069 INFO L78 Accepts]: Start accepts. Automaton has 19849 states and 25163 transitions. Word has length 193 [2022-07-19 11:11:42,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:42,070 INFO L495 AbstractCegarLoop]: Abstraction has 19849 states and 25163 transitions. [2022-07-19 11:11:42,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 19849 states and 25163 transitions. [2022-07-19 11:11:42,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-07-19 11:11:42,096 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:42,097 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:42,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 11:11:42,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:42,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:42,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1663863640, now seen corresponding path program 1 times [2022-07-19 11:11:42,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:42,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438319206] [2022-07-19 11:11:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:42,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 11:11:42,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:42,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438319206] [2022-07-19 11:11:42,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438319206] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:42,160 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:42,160 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:42,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468288405] [2022-07-19 11:11:42,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:42,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:42,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:42,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:42,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:42,162 INFO L87 Difference]: Start difference. First operand 19849 states and 25163 transitions. Second operand has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:42,887 INFO L93 Difference]: Finished difference Result 44800 states and 56939 transitions. [2022-07-19 11:11:42,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:42,888 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 212 [2022-07-19 11:11:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:42,927 INFO L225 Difference]: With dead ends: 44800 [2022-07-19 11:11:42,927 INFO L226 Difference]: Without dead ends: 25562 [2022-07-19 11:11:42,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:42,946 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 206 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:42,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 190 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:42,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25562 states. [2022-07-19 11:11:43,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25562 to 25533. [2022-07-19 11:11:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25533 states, 25532 states have (on average 1.2536424878583738) internal successors, (32008), 25532 states have internal predecessors, (32008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:43,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25533 states to 25533 states and 32008 transitions. [2022-07-19 11:11:43,331 INFO L78 Accepts]: Start accepts. Automaton has 25533 states and 32008 transitions. Word has length 212 [2022-07-19 11:11:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:43,332 INFO L495 AbstractCegarLoop]: Abstraction has 25533 states and 32008 transitions. [2022-07-19 11:11:43,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.666666666666664) internal successors, (185), 2 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:43,333 INFO L276 IsEmpty]: Start isEmpty. Operand 25533 states and 32008 transitions. [2022-07-19 11:11:43,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-19 11:11:43,352 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:43,353 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:43,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:11:43,355 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:43,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:43,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1762395779, now seen corresponding path program 1 times [2022-07-19 11:11:43,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:43,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735204242] [2022-07-19 11:11:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 6 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-19 11:11:43,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735204242] [2022-07-19 11:11:43,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735204242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:43,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308033147] [2022-07-19 11:11:43,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:43,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:43,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:43,432 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:43,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 11:11:43,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:43,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:43,731 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 11:11:43,731 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:43,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308033147] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:43,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:43,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:11:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698696554] [2022-07-19 11:11:43,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:43,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:43,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:43,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:43,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:43,739 INFO L87 Difference]: Start difference. First operand 25533 states and 32008 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:44,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:44,609 INFO L93 Difference]: Finished difference Result 58777 states and 74386 transitions. [2022-07-19 11:11:44,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:44,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 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 219 [2022-07-19 11:11:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:44,663 INFO L225 Difference]: With dead ends: 58777 [2022-07-19 11:11:44,663 INFO L226 Difference]: Without dead ends: 33449 [2022-07-19 11:11:44,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:44,693 INFO L413 NwaCegarLoop]: 141 mSDtfsCounter, 226 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:44,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 166 Invalid, 720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:44,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33449 states. [2022-07-19 11:11:45,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33449 to 33444. [2022-07-19 11:11:45,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33444 states, 33443 states have (on average 1.191789014143468) internal successors, (39857), 33443 states have internal predecessors, (39857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:45,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33444 states to 33444 states and 39857 transitions. [2022-07-19 11:11:45,147 INFO L78 Accepts]: Start accepts. Automaton has 33444 states and 39857 transitions. Word has length 219 [2022-07-19 11:11:45,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:45,147 INFO L495 AbstractCegarLoop]: Abstraction has 33444 states and 39857 transitions. [2022-07-19 11:11:45,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 2 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:45,148 INFO L276 IsEmpty]: Start isEmpty. Operand 33444 states and 39857 transitions. [2022-07-19 11:11:45,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-19 11:11:45,170 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:45,171 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:45,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 11:11:45,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:45,389 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:45,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:45,389 INFO L85 PathProgramCache]: Analyzing trace with hash -797432397, now seen corresponding path program 1 times [2022-07-19 11:11:45,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:45,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128607204] [2022-07-19 11:11:45,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:45,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:45,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-07-19 11:11:45,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:45,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128607204] [2022-07-19 11:11:45,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128607204] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:45,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:45,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:45,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148831815] [2022-07-19 11:11:45,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:45,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:45,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:45,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:45,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:45,469 INFO L87 Difference]: Start difference. First operand 33444 states and 39857 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:46,301 INFO L93 Difference]: Finished difference Result 72193 states and 86142 transitions. [2022-07-19 11:11:46,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:46,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 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 221 [2022-07-19 11:11:46,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:46,351 INFO L225 Difference]: With dead ends: 72193 [2022-07-19 11:11:46,351 INFO L226 Difference]: Without dead ends: 39360 [2022-07-19 11:11:46,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:46,378 INFO L413 NwaCegarLoop]: 373 mSDtfsCounter, 210 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 394 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:11:46,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39360 states. [2022-07-19 11:11:46,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39360 to 36284. [2022-07-19 11:11:46,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36284 states, 36283 states have (on average 1.1725050299038118) internal successors, (42542), 36283 states have internal predecessors, (42542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36284 states to 36284 states and 42542 transitions. [2022-07-19 11:11:46,903 INFO L78 Accepts]: Start accepts. Automaton has 36284 states and 42542 transitions. Word has length 221 [2022-07-19 11:11:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:46,904 INFO L495 AbstractCegarLoop]: Abstraction has 36284 states and 42542 transitions. [2022-07-19 11:11:46,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 36284 states and 42542 transitions. [2022-07-19 11:11:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-19 11:11:46,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:46,929 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:46,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 11:11:46,930 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:46,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:46,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1931969917, now seen corresponding path program 1 times [2022-07-19 11:11:46,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:46,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561725825] [2022-07-19 11:11:46,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:46,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:46,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 11:11:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:47,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561725825] [2022-07-19 11:11:47,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561725825] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:47,001 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:47,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:11:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010887253] [2022-07-19 11:11:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:47,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:11:47,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:11:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:11:47,002 INFO L87 Difference]: Start difference. First operand 36284 states and 42542 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:48,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:48,182 INFO L93 Difference]: Finished difference Result 71400 states and 83827 transitions. [2022-07-19 11:11:48,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:11:48,183 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 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 239 [2022-07-19 11:11:48,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:48,221 INFO L225 Difference]: With dead ends: 71400 [2022-07-19 11:11:48,222 INFO L226 Difference]: Without dead ends: 36336 [2022-07-19 11:11:48,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:11:48,243 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 432 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1066 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 1066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:48,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [432 Valid, 183 Invalid, 1382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 1066 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 11:11:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36336 states. [2022-07-19 11:11:48,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36336 to 35472. [2022-07-19 11:11:48,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35472 states, 35471 states have (on average 1.1740294888782385) internal successors, (41644), 35471 states have internal predecessors, (41644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35472 states to 35472 states and 41644 transitions. [2022-07-19 11:11:48,707 INFO L78 Accepts]: Start accepts. Automaton has 35472 states and 41644 transitions. Word has length 239 [2022-07-19 11:11:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:48,708 INFO L495 AbstractCegarLoop]: Abstraction has 35472 states and 41644 transitions. [2022-07-19 11:11:48,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 3 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:48,708 INFO L276 IsEmpty]: Start isEmpty. Operand 35472 states and 41644 transitions. [2022-07-19 11:11:48,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-19 11:11:48,728 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:48,728 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:48,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:11:48,729 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:48,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:48,729 INFO L85 PathProgramCache]: Analyzing trace with hash -1470810625, now seen corresponding path program 1 times [2022-07-19 11:11:48,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:48,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128580062] [2022-07-19 11:11:48,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:48,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:48,804 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:11:48,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:48,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128580062] [2022-07-19 11:11:48,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128580062] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:48,805 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:11:48,805 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:11:48,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046507254] [2022-07-19 11:11:48,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:48,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:48,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:48,807 INFO L87 Difference]: Start difference. First operand 35472 states and 41644 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:49,412 INFO L93 Difference]: Finished difference Result 70335 states and 82624 transitions. [2022-07-19 11:11:49,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:49,413 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 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 239 [2022-07-19 11:11:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:49,452 INFO L225 Difference]: With dead ends: 70335 [2022-07-19 11:11:49,452 INFO L226 Difference]: Without dead ends: 36083 [2022-07-19 11:11:49,474 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:11:49,474 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:49,475 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 197 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:11:49,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36083 states. [2022-07-19 11:11:49,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36083 to 36081. [2022-07-19 11:11:49,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36081 states, 36080 states have (on average 1.172810421286031) internal successors, (42315), 36080 states have internal predecessors, (42315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:49,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36081 states to 36081 states and 42315 transitions. [2022-07-19 11:11:49,932 INFO L78 Accepts]: Start accepts. Automaton has 36081 states and 42315 transitions. Word has length 239 [2022-07-19 11:11:49,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:49,932 INFO L495 AbstractCegarLoop]: Abstraction has 36081 states and 42315 transitions. [2022-07-19 11:11:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:49,933 INFO L276 IsEmpty]: Start isEmpty. Operand 36081 states and 42315 transitions. [2022-07-19 11:11:49,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2022-07-19 11:11:49,952 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:49,952 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:49,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 11:11:49,952 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:49,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:49,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1685100686, now seen corresponding path program 1 times [2022-07-19 11:11:49,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:49,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510124793] [2022-07-19 11:11:49,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:49,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 92 proven. 6 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-07-19 11:11:50,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:50,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510124793] [2022-07-19 11:11:50,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510124793] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:50,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927310144] [2022-07-19 11:11:50,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:50,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:50,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:50,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:50,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 11:11:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:50,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 11:11:50,478 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:50,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927310144] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:50,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:50,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91352832] [2022-07-19 11:11:50,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:50,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:50,480 INFO L87 Difference]: Start difference. First operand 36081 states and 42315 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:51,208 INFO L93 Difference]: Finished difference Result 69158 states and 81138 transitions. [2022-07-19 11:11:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:51,208 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 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 246 [2022-07-19 11:11:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:51,246 INFO L225 Difference]: With dead ends: 69158 [2022-07-19 11:11:51,246 INFO L226 Difference]: Without dead ends: 33688 [2022-07-19 11:11:51,270 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:51,271 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:51,271 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 371 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:51,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33688 states. [2022-07-19 11:11:51,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33688 to 33643. [2022-07-19 11:11:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33643 states, 33642 states have (on average 1.1606919921526664) internal successors, (39048), 33642 states have internal predecessors, (39048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33643 states to 33643 states and 39048 transitions. [2022-07-19 11:11:51,668 INFO L78 Accepts]: Start accepts. Automaton has 33643 states and 39048 transitions. Word has length 246 [2022-07-19 11:11:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:51,668 INFO L495 AbstractCegarLoop]: Abstraction has 33643 states and 39048 transitions. [2022-07-19 11:11:51,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 33643 states and 39048 transitions. [2022-07-19 11:11:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-07-19 11:11:51,686 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:51,686 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:51,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 11:11:51,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 11:11:51,887 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:51,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1081874721, now seen corresponding path program 1 times [2022-07-19 11:11:51,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:51,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580166702] [2022-07-19 11:11:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:51,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 11:11:51,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:51,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580166702] [2022-07-19 11:11:51,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580166702] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:51,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911165490] [2022-07-19 11:11:51,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:51,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:51,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:51,991 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:51,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:11:52,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:52,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:52,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 11:11:52,191 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:52,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911165490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:52,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:52,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:11:52,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768185911] [2022-07-19 11:11:52,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:52,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:52,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:52,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:52,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:52,194 INFO L87 Difference]: Start difference. First operand 33643 states and 39048 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:52,904 INFO L93 Difference]: Finished difference Result 71803 states and 83915 transitions. [2022-07-19 11:11:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 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 259 [2022-07-19 11:11:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:52,951 INFO L225 Difference]: With dead ends: 71803 [2022-07-19 11:11:52,951 INFO L226 Difference]: Without dead ends: 39583 [2022-07-19 11:11:52,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:52,975 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 168 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:52,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 184 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:53,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39583 states. [2022-07-19 11:11:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39583 to 39536. [2022-07-19 11:11:53,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39536 states, 39535 states have (on average 1.1671683318578474) internal successors, (46144), 39535 states have internal predecessors, (46144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:53,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39536 states to 39536 states and 46144 transitions. [2022-07-19 11:11:53,424 INFO L78 Accepts]: Start accepts. Automaton has 39536 states and 46144 transitions. Word has length 259 [2022-07-19 11:11:53,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:53,424 INFO L495 AbstractCegarLoop]: Abstraction has 39536 states and 46144 transitions. [2022-07-19 11:11:53,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 2 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:53,424 INFO L276 IsEmpty]: Start isEmpty. Operand 39536 states and 46144 transitions. [2022-07-19 11:11:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2022-07-19 11:11:53,451 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:53,452 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:53,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-19 11:11:53,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:53,659 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:53,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:53,659 INFO L85 PathProgramCache]: Analyzing trace with hash 680826533, now seen corresponding path program 1 times [2022-07-19 11:11:53,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:53,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469481708] [2022-07-19 11:11:53,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:53,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:53,728 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 125 proven. 6 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-07-19 11:11:53,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:53,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469481708] [2022-07-19 11:11:53,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469481708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:53,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236759146] [2022-07-19 11:11:53,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:53,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:53,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:53,730 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:53,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:11:53,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:53,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:53,973 INFO L134 CoverageAnalysis]: Checked inductivity of 258 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 11:11:53,974 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:53,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236759146] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:53,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:53,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:53,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905207909] [2022-07-19 11:11:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:53,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:53,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:53,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:53,976 INFO L87 Difference]: Start difference. First operand 39536 states and 46144 transitions. Second operand has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:54,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:54,401 INFO L93 Difference]: Finished difference Result 110434 states and 128824 transitions. [2022-07-19 11:11:54,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:54,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 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 270 [2022-07-19 11:11:54,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:54,481 INFO L225 Difference]: With dead ends: 110434 [2022-07-19 11:11:54,481 INFO L226 Difference]: Without dead ends: 72321 [2022-07-19 11:11:54,515 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:54,516 INFO L413 NwaCegarLoop]: 601 mSDtfsCounter, 303 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 871 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:54,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [303 Valid, 871 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 11:11:54,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72321 states. [2022-07-19 11:11:55,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72321 to 67440. [2022-07-19 11:11:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67440 states, 67439 states have (on average 1.1524933643737303) internal successors, (77723), 67439 states have internal predecessors, (77723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:55,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67440 states to 67440 states and 77723 transitions. [2022-07-19 11:11:55,389 INFO L78 Accepts]: Start accepts. Automaton has 67440 states and 77723 transitions. Word has length 270 [2022-07-19 11:11:55,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:55,389 INFO L495 AbstractCegarLoop]: Abstraction has 67440 states and 77723 transitions. [2022-07-19 11:11:55,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.0) internal successors, (231), 3 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:55,389 INFO L276 IsEmpty]: Start isEmpty. Operand 67440 states and 77723 transitions. [2022-07-19 11:11:55,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-19 11:11:55,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:55,426 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:55,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 11:11:55,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 11:11:55,627 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:55,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:55,627 INFO L85 PathProgramCache]: Analyzing trace with hash 935317674, now seen corresponding path program 1 times [2022-07-19 11:11:55,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:55,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874685508] [2022-07-19 11:11:55,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:55,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 127 proven. 6 refuted. 0 times theorem prover too weak. 129 trivial. 0 not checked. [2022-07-19 11:11:55,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874685508] [2022-07-19 11:11:55,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874685508] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:55,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737564191] [2022-07-19 11:11:55,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:55,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:55,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:55,721 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:55,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:11:55,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:55,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:11:55,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:56,053 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2022-07-19 11:11:56,054 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:56,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737564191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:56,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:56,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:11:56,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388753631] [2022-07-19 11:11:56,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:56,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:56,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:56,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:56,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:56,056 INFO L87 Difference]: Start difference. First operand 67440 states and 77723 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:57,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:57,118 INFO L93 Difference]: Finished difference Result 151806 states and 175563 transitions. [2022-07-19 11:11:57,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:57,118 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 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 272 [2022-07-19 11:11:57,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:57,222 INFO L225 Difference]: With dead ends: 151806 [2022-07-19 11:11:57,222 INFO L226 Difference]: Without dead ends: 85789 [2022-07-19 11:11:57,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 271 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:57,267 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 104 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:57,267 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 181 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:11:57,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85789 states. [2022-07-19 11:11:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85789 to 85750. [2022-07-19 11:11:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85750 states, 85749 states have (on average 1.1460425194462909) internal successors, (98272), 85749 states have internal predecessors, (98272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85750 states to 85750 states and 98272 transitions. [2022-07-19 11:11:58,326 INFO L78 Accepts]: Start accepts. Automaton has 85750 states and 98272 transitions. Word has length 272 [2022-07-19 11:11:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:11:58,326 INFO L495 AbstractCegarLoop]: Abstraction has 85750 states and 98272 transitions. [2022-07-19 11:11:58,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:58,327 INFO L276 IsEmpty]: Start isEmpty. Operand 85750 states and 98272 transitions. [2022-07-19 11:11:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-19 11:11:58,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:11:58,369 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:11:58,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 11:11:58,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-19 11:11:58,580 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:11:58,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:11:58,581 INFO L85 PathProgramCache]: Analyzing trace with hash -506352805, now seen corresponding path program 1 times [2022-07-19 11:11:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:11:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832251197] [2022-07-19 11:11:58,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:58,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:11:58,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 129 proven. 6 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-19 11:11:58,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:11:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832251197] [2022-07-19 11:11:58,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832251197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:11:58,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440487754] [2022-07-19 11:11:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:11:58,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:11:58,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:11:58,671 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:11:58,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:11:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:11:58,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:11:58,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:11:58,850 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 149 proven. 0 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-07-19 11:11:58,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:11:58,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440487754] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:11:58,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:11:58,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-19 11:11:58,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351928900] [2022-07-19 11:11:58,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:11:58,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:11:58,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:11:58,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:11:58,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:58,853 INFO L87 Difference]: Start difference. First operand 85750 states and 98272 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:11:59,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:11:59,662 INFO L93 Difference]: Finished difference Result 152056 states and 173972 transitions. [2022-07-19 11:11:59,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:11:59,662 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 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 280 [2022-07-19 11:11:59,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:11:59,745 INFO L225 Difference]: With dead ends: 152056 [2022-07-19 11:11:59,745 INFO L226 Difference]: Without dead ends: 67729 [2022-07-19 11:11:59,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:11:59,804 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 308 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:11:59,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:11:59,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67729 states. [2022-07-19 11:12:00,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67729 to 66511. [2022-07-19 11:12:00,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66511 states, 66510 states have (on average 1.128191249436175) internal successors, (75036), 66510 states have internal predecessors, (75036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:00,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66511 states to 66511 states and 75036 transitions. [2022-07-19 11:12:00,720 INFO L78 Accepts]: Start accepts. Automaton has 66511 states and 75036 transitions. Word has length 280 [2022-07-19 11:12:00,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:00,720 INFO L495 AbstractCegarLoop]: Abstraction has 66511 states and 75036 transitions. [2022-07-19 11:12:00,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:00,720 INFO L276 IsEmpty]: Start isEmpty. Operand 66511 states and 75036 transitions. [2022-07-19 11:12:00,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2022-07-19 11:12:00,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:00,972 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:01,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 11:12:01,172 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:01,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash 164883694, now seen corresponding path program 1 times [2022-07-19 11:12:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:01,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327057854] [2022-07-19 11:12:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 161 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-07-19 11:12:01,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:01,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327057854] [2022-07-19 11:12:01,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327057854] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:01,262 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:01,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823976264] [2022-07-19 11:12:01,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:01,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:01,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:01,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:01,265 INFO L87 Difference]: Start difference. First operand 66511 states and 75036 transitions. Second operand has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:02,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:02,091 INFO L93 Difference]: Finished difference Result 123876 states and 139997 transitions. [2022-07-19 11:12:02,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:02,092 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 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 285 [2022-07-19 11:12:02,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:02,157 INFO L225 Difference]: With dead ends: 123876 [2022-07-19 11:12:02,158 INFO L226 Difference]: Without dead ends: 58585 [2022-07-19 11:12:02,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:02,197 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 551 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 551 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:02,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [551 Valid, 55 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:02,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58585 states. [2022-07-19 11:12:02,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58585 to 55538. [2022-07-19 11:12:02,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55538 states, 55537 states have (on average 1.1038947008300772) internal successors, (61307), 55537 states have internal predecessors, (61307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:03,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55538 states to 55538 states and 61307 transitions. [2022-07-19 11:12:03,113 INFO L78 Accepts]: Start accepts. Automaton has 55538 states and 61307 transitions. Word has length 285 [2022-07-19 11:12:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:03,113 INFO L495 AbstractCegarLoop]: Abstraction has 55538 states and 61307 transitions. [2022-07-19 11:12:03,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.5) internal successors, (218), 3 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 55538 states and 61307 transitions. [2022-07-19 11:12:03,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-19 11:12:03,135 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:03,135 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:03,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 11:12:03,136 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:03,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:03,136 INFO L85 PathProgramCache]: Analyzing trace with hash -655692901, now seen corresponding path program 1 times [2022-07-19 11:12:03,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:03,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180548919] [2022-07-19 11:12:03,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:03,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:03,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:03,209 INFO L134 CoverageAnalysis]: Checked inductivity of 327 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2022-07-19 11:12:03,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:03,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180548919] [2022-07-19 11:12:03,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180548919] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:03,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:03,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:03,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574869512] [2022-07-19 11:12:03,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:03,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:03,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:03,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:03,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:03,219 INFO L87 Difference]: Start difference. First operand 55538 states and 61307 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:04,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:04,032 INFO L93 Difference]: Finished difference Result 120044 states and 133171 transitions. [2022-07-19 11:12:04,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:04,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 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 304 [2022-07-19 11:12:04,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:04,110 INFO L225 Difference]: With dead ends: 120044 [2022-07-19 11:12:04,110 INFO L226 Difference]: Without dead ends: 65726 [2022-07-19 11:12:04,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:04,154 INFO L413 NwaCegarLoop]: 143 mSDtfsCounter, 205 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:04,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 159 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:04,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65726 states. [2022-07-19 11:12:04,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65726 to 65719. [2022-07-19 11:12:04,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65719 states, 65718 states have (on average 1.1127088468912627) internal successors, (73125), 65718 states have internal predecessors, (73125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65719 states to 65719 states and 73125 transitions. [2022-07-19 11:12:05,026 INFO L78 Accepts]: Start accepts. Automaton has 65719 states and 73125 transitions. Word has length 304 [2022-07-19 11:12:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:05,027 INFO L495 AbstractCegarLoop]: Abstraction has 65719 states and 73125 transitions. [2022-07-19 11:12:05,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 2 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 65719 states and 73125 transitions. [2022-07-19 11:12:05,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2022-07-19 11:12:05,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:05,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:12:05,054 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:05,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 417813854, now seen corresponding path program 1 times [2022-07-19 11:12:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:05,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568789377] [2022-07-19 11:12:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:05,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 221 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 11:12:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:05,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568789377] [2022-07-19 11:12:05,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568789377] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:05,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:05,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:05,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331136823] [2022-07-19 11:12:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:05,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:05,406 INFO L87 Difference]: Start difference. First operand 65719 states and 73125 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:06,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:06,160 INFO L93 Difference]: Finished difference Result 116991 states and 129721 transitions. [2022-07-19 11:12:06,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:06,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 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 325 [2022-07-19 11:12:06,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:06,227 INFO L225 Difference]: With dead ends: 116991 [2022-07-19 11:12:06,228 INFO L226 Difference]: Without dead ends: 52695 [2022-07-19 11:12:06,267 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:06,268 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 218 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:06,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 322 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:06,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52695 states. [2022-07-19 11:12:06,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52695 to 51877. [2022-07-19 11:12:06,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51877 states, 51876 states have (on average 1.0952270799599044) internal successors, (56816), 51876 states have internal predecessors, (56816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:06,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51877 states to 51877 states and 56816 transitions. [2022-07-19 11:12:06,984 INFO L78 Accepts]: Start accepts. Automaton has 51877 states and 56816 transitions. Word has length 325 [2022-07-19 11:12:06,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:06,984 INFO L495 AbstractCegarLoop]: Abstraction has 51877 states and 56816 transitions. [2022-07-19 11:12:06,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 3 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:06,984 INFO L276 IsEmpty]: Start isEmpty. Operand 51877 states and 56816 transitions. [2022-07-19 11:12:07,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2022-07-19 11:12:07,015 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:07,015 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:07,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 11:12:07,015 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:07,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1540453437, now seen corresponding path program 1 times [2022-07-19 11:12:07,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:07,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780219617] [2022-07-19 11:12:07,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:07,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:07,138 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 306 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:07,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:07,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780219617] [2022-07-19 11:12:07,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780219617] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:07,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542684139] [2022-07-19 11:12:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:07,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:07,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:07,140 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:07,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 11:12:07,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:07,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 670 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:07,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:07,496 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 203 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-07-19 11:12:07,496 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:07,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542684139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:07,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:07,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-19 11:12:07,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812410290] [2022-07-19 11:12:07,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:07,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:07,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:07,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:07,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:07,498 INFO L87 Difference]: Start difference. First operand 51877 states and 56816 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:08,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:08,155 INFO L93 Difference]: Finished difference Result 139957 states and 152933 transitions. [2022-07-19 11:12:08,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:08,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 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 373 [2022-07-19 11:12:08,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:08,252 INFO L225 Difference]: With dead ends: 139957 [2022-07-19 11:12:08,253 INFO L226 Difference]: Without dead ends: 89503 [2022-07-19 11:12:08,295 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 373 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:08,296 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 197 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:08,296 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 525 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 11:12:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89503 states. [2022-07-19 11:12:09,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89503 to 89492. [2022-07-19 11:12:09,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89492 states, 89491 states have (on average 1.0903331061224033) internal successors, (97575), 89491 states have internal predecessors, (97575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:09,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89492 states to 89492 states and 97575 transitions. [2022-07-19 11:12:09,419 INFO L78 Accepts]: Start accepts. Automaton has 89492 states and 97575 transitions. Word has length 373 [2022-07-19 11:12:09,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:09,419 INFO L495 AbstractCegarLoop]: Abstraction has 89492 states and 97575 transitions. [2022-07-19 11:12:09,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 2 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:09,419 INFO L276 IsEmpty]: Start isEmpty. Operand 89492 states and 97575 transitions. [2022-07-19 11:12:09,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2022-07-19 11:12:09,491 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:09,491 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:09,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:09,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:09,700 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:09,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash 802084113, now seen corresponding path program 1 times [2022-07-19 11:12:09,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:09,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110312015] [2022-07-19 11:12:09,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:09,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 348 proven. 6 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-19 11:12:10,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110312015] [2022-07-19 11:12:10,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110312015] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:10,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670035349] [2022-07-19 11:12:10,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:10,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:10,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:10,212 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:12:10,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 11:12:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:10,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 860 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:10,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:10,629 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 458 proven. 0 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-07-19 11:12:10,629 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:10,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670035349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:10,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:10,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:12:10,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723338867] [2022-07-19 11:12:10,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:10,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:10,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:10,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:10,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:10,639 INFO L87 Difference]: Start difference. First operand 89492 states and 97575 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:11,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:11,460 INFO L93 Difference]: Finished difference Result 177156 states and 193208 transitions. [2022-07-19 11:12:11,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 497 [2022-07-19 11:12:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:11,462 INFO L225 Difference]: With dead ends: 177156 [2022-07-19 11:12:11,462 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 11:12:11,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 496 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:11,518 INFO L413 NwaCegarLoop]: 274 mSDtfsCounter, 93 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:11,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 281 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 604 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:12:11,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 11:12:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 11:12:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 11:12:11,519 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 497 [2022-07-19 11:12:11,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:11,519 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 11:12:11,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 11:12:11,520 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 11:12:11,522 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 11:12:11,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 11:12:11,722 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,SelfDestructingSolverStorable21 [2022-07-19 11:12:11,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.