./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label26.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 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/Problem13_label26.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 f7d9d441800fd040181450c0920264f1b228689c17b8db097e43b17ec5ad46cc --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:43:43,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:43:43,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:43:43,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:43:43,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:43:43,970 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:43:43,973 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:43:43,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:43:43,979 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:43:43,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:43:43,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:43:43,982 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:43:43,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:43:43,984 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:43:43,985 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:43:43,986 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:43:43,987 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:43:43,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:43:43,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:43:43,990 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:43:43,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:43:43,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:43:43,996 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:43:43,998 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:43:44,000 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:43:44,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:43:44,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:43:44,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:43:44,006 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:43:44,007 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:43:44,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:43:44,008 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:43:44,009 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:43:44,010 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:43:44,011 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:43:44,011 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:43:44,012 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:43:44,012 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:43:44,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:43:44,013 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:43:44,014 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:43:44,014 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:43:44,044 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:43:44,044 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:43:44,047 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:43:44,047 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:43:44,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:43:44,048 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:43:44,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:43:44,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:43:44,049 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:43:44,059 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:43:44,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:43:44,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:43:44,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:43:44,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:43:44,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:43:44,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:43:44,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:43:44,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:43:44,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:43:44,062 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:43:44,062 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:43:44,062 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:43:44,062 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:43:44,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:43:44,063 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:44,063 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:43:44,063 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:43:44,063 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:43:44,063 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:43:44,064 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:43:44,064 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:43:44,064 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:43:44,064 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:43:44,064 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:43:44,065 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7d9d441800fd040181450c0920264f1b228689c17b8db097e43b17ec5ad46cc [2021-12-15 09:43:44,324 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:43:44,357 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:43:44,358 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:43:44,359 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:43:44,360 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:43:44,360 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2021-12-15 09:43:44,401 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda180b95/e4116093506b4cbab6ebdc0aabec3bda/FLAG348cedafb [2021-12-15 09:43:44,972 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:43:44,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label26.c [2021-12-15 09:43:45,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda180b95/e4116093506b4cbab6ebdc0aabec3bda/FLAG348cedafb [2021-12-15 09:43:45,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cda180b95/e4116093506b4cbab6ebdc0aabec3bda [2021-12-15 09:43:45,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:43:45,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:43:45,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:45,441 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:43:45,443 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:43:45,444 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:45" (1/1) ... [2021-12-15 09:43:45,445 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c3fc8c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:45, skipping insertion in model container [2021-12-15 09:43:45,445 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:43:45" (1/1) ... [2021-12-15 09:43:45,449 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:43:45,528 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:43:45,758 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/Problem13_label26.c[5554,5567] [2021-12-15 09:43:46,474 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:46,481 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:43:46,502 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/Problem13_label26.c[5554,5567] [2021-12-15 09:43:46,894 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:43:46,912 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:43:46,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46 WrapperNode [2021-12-15 09:43:46,912 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:43:46,913 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:46,913 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:43:46,913 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:43:46,918 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,386 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-15 09:43:47,387 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:43:47,388 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:43:47,388 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:43:47,388 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:43:47,394 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:47,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:48,055 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:43:48,057 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:43:48,057 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:43:48,058 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:43:48,058 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (1/1) ... [2021-12-15 09:43:48,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:43:48,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:43:48,116 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) [2021-12-15 09:43:48,148 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 [2021-12-15 09:43:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:43:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:43:48,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:43:48,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:43:48,220 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:43:48,221 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:43:51,505 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:43:51,520 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:43:51,522 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:43:51,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:51 BoogieIcfgContainer [2021-12-15 09:43:51,525 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:43:51,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:43:51,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:43:51,529 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:43:51,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:43:45" (1/3) ... [2021-12-15 09:43:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f06bbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:51, skipping insertion in model container [2021-12-15 09:43:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:43:46" (2/3) ... [2021-12-15 09:43:51,530 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f06bbc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:43:51, skipping insertion in model container [2021-12-15 09:43:51,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:43:51" (3/3) ... [2021-12-15 09:43:51,531 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label26.c [2021-12-15 09:43:51,535 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:43:51,535 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:43:51,577 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:43:51,583 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:43:51,584 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:43:51,612 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:51,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-15 09:43:51,626 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:51,626 INFO L514 BasicCegarLoop]: 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] [2021-12-15 09:43:51,627 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:51,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:51,630 INFO L85 PathProgramCache]: Analyzing trace with hash 323974986, now seen corresponding path program 1 times [2021-12-15 09:43:51,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:51,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991935210] [2021-12-15 09:43:51,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:51,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:51,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:51,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:51,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991935210] [2021-12-15 09:43:51,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991935210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:51,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:51,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:43:51,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181316198] [2021-12-15 09:43:51,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:51,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:43:51,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:51,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:43:51,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:43:51,874 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:43:55,798 INFO L93 Difference]: Finished difference Result 3121 states and 5804 transitions. [2021-12-15 09:43:55,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:43:55,800 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-12-15 09:43:55,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:43:55,820 INFO L225 Difference]: With dead ends: 3121 [2021-12-15 09:43:55,824 INFO L226 Difference]: Without dead ends: 1944 [2021-12-15 09:43:55,832 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:43:55,845 INFO L933 BasicCegarLoop]: 438 mSDtfsCounter, 951 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3124 mSolverCounterSat, 577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 3701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 577 IncrementalHoareTripleChecker+Valid, 3124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:43:55,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [951 Valid, 575 Invalid, 3701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [577 Valid, 3124 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-15 09:43:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-12-15 09:43:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1873. [2021-12-15 09:43:55,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1872 states have (on average 1.7393162393162394) internal successors, (3256), 1872 states have internal predecessors, (3256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:55,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3256 transitions. [2021-12-15 09:43:55,955 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3256 transitions. Word has length 38 [2021-12-15 09:43:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:43:55,955 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3256 transitions. [2021-12-15 09:43:55,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 2 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:43:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3256 transitions. [2021-12-15 09:43:55,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-12-15 09:43:55,958 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:43:55,958 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:43:55,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:43:55,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:43:55,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:43:55,959 INFO L85 PathProgramCache]: Analyzing trace with hash -2086094830, now seen corresponding path program 1 times [2021-12-15 09:43:55,959 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:43:55,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887139610] [2021-12-15 09:43:55,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:43:55,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:43:56,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:43:56,159 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:43:56,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:43:56,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887139610] [2021-12-15 09:43:56,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887139610] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:43:56,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:43:56,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:43:56,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590159500] [2021-12-15 09:43:56,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:43:56,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:43:56,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:43:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:43:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:43:56,164 INFO L87 Difference]: Start difference. First operand 1873 states and 3256 transitions. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:01,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:01,139 INFO L93 Difference]: Finished difference Result 6152 states and 10700 transitions. [2021-12-15 09:44:01,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:01,153 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 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 103 [2021-12-15 09:44:01,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:01,166 INFO L225 Difference]: With dead ends: 6152 [2021-12-15 09:44:01,166 INFO L226 Difference]: Without dead ends: 4281 [2021-12-15 09:44:01,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:44:01,174 INFO L933 BasicCegarLoop]: 718 mSDtfsCounter, 2628 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4125 mSolverCounterSat, 1299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2628 SdHoareTripleChecker+Valid, 1017 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1299 IncrementalHoareTripleChecker+Valid, 4125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:01,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2628 Valid, 1017 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1299 Valid, 4125 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-15 09:44:01,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2021-12-15 09:44:01,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4280. [2021-12-15 09:44:01,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 1.4774480018695957) internal successors, (6322), 4279 states have internal predecessors, (6322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:01,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 6322 transitions. [2021-12-15 09:44:01,251 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 6322 transitions. Word has length 103 [2021-12-15 09:44:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:01,253 INFO L470 AbstractCegarLoop]: Abstraction has 4280 states and 6322 transitions. [2021-12-15 09:44:01,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 3 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:01,254 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 6322 transitions. [2021-12-15 09:44:01,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-12-15 09:44:01,262 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:01,262 INFO L514 BasicCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:01,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:44:01,265 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:01,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:01,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1645854677, now seen corresponding path program 1 times [2021-12-15 09:44:01,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:01,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730088689] [2021-12-15 09:44:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:01,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:01,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:01,390 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-12-15 09:44:01,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:01,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730088689] [2021-12-15 09:44:01,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730088689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:01,391 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:01,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:01,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316498984] [2021-12-15 09:44:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:01,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:01,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:01,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:01,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:01,394 INFO L87 Difference]: Start difference. First operand 4280 states and 6322 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:04,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:04,621 INFO L93 Difference]: Finished difference Result 10966 states and 16976 transitions. [2021-12-15 09:44:04,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:04,622 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 134 [2021-12-15 09:44:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:04,646 INFO L225 Difference]: With dead ends: 10966 [2021-12-15 09:44:04,646 INFO L226 Difference]: Without dead ends: 7475 [2021-12-15 09:44:04,652 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:04,655 INFO L933 BasicCegarLoop]: 665 mSDtfsCounter, 866 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 526 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 3543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 526 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:04,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [866 Valid, 830 Invalid, 3543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [526 Valid, 3017 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-15 09:44:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7475 states. [2021-12-15 09:44:04,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7475 to 7470. [2021-12-15 09:44:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7470 states, 7469 states have (on average 1.469272995046191) internal successors, (10974), 7469 states have internal predecessors, (10974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:04,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7470 states to 7470 states and 10974 transitions. [2021-12-15 09:44:04,761 INFO L78 Accepts]: Start accepts. Automaton has 7470 states and 10974 transitions. Word has length 134 [2021-12-15 09:44:04,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:04,762 INFO L470 AbstractCegarLoop]: Abstraction has 7470 states and 10974 transitions. [2021-12-15 09:44:04,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:04,763 INFO L276 IsEmpty]: Start isEmpty. Operand 7470 states and 10974 transitions. [2021-12-15 09:44:04,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-15 09:44:04,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:04,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:04,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:44:04,765 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:04,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:04,766 INFO L85 PathProgramCache]: Analyzing trace with hash -469911092, now seen corresponding path program 1 times [2021-12-15 09:44:04,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:04,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860130129] [2021-12-15 09:44:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:04,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:04,901 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:04,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:04,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860130129] [2021-12-15 09:44:04,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860130129] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:04,901 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:04,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:04,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910382800] [2021-12-15 09:44:04,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:04,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:04,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:04,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:04,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:04,903 INFO L87 Difference]: Start difference. First operand 7470 states and 10974 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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) [2021-12-15 09:44:07,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:07,802 INFO L93 Difference]: Finished difference Result 20467 states and 30850 transitions. [2021-12-15 09:44:07,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:07,802 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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 201 [2021-12-15 09:44:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:07,869 INFO L225 Difference]: With dead ends: 20467 [2021-12-15 09:44:07,874 INFO L226 Difference]: Without dead ends: 13786 [2021-12-15 09:44:07,900 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:07,921 INFO L933 BasicCegarLoop]: 795 mSDtfsCounter, 903 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 929 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:07,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 913 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:07,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13786 states. [2021-12-15 09:44:08,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13786 to 13777. [2021-12-15 09:44:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.3684668989547037) internal successors, (18852), 13776 states have internal predecessors, (18852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 18852 transitions. [2021-12-15 09:44:08,112 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 18852 transitions. Word has length 201 [2021-12-15 09:44:08,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:08,113 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 18852 transitions. [2021-12-15 09:44:08,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 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) [2021-12-15 09:44:08,114 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 18852 transitions. [2021-12-15 09:44:08,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:44:08,115 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:08,115 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:08,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:44:08,116 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:08,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:08,118 INFO L85 PathProgramCache]: Analyzing trace with hash 170282466, now seen corresponding path program 1 times [2021-12-15 09:44:08,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:08,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100996296] [2021-12-15 09:44:08,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:08,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:08,219 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 09:44:08,219 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:08,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100996296] [2021-12-15 09:44:08,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100996296] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:08,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:08,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:08,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160385032] [2021-12-15 09:44:08,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:08,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:08,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:08,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:08,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:08,221 INFO L87 Difference]: Start difference. First operand 13777 states and 18852 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:11,189 INFO L93 Difference]: Finished difference Result 38608 states and 53608 transitions. [2021-12-15 09:44:11,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:11,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-15 09:44:11,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:11,246 INFO L225 Difference]: With dead ends: 38608 [2021-12-15 09:44:11,246 INFO L226 Difference]: Without dead ends: 25620 [2021-12-15 09:44:11,264 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:11,265 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 946 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 2522 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 946 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 3297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:11,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [946 Valid, 836 Invalid, 3297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2522 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 09:44:11,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25620 states. [2021-12-15 09:44:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25620 to 25609. [2021-12-15 09:44:11,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25609 states, 25608 states have (on average 1.2740940331146517) internal successors, (32627), 25608 states have internal predecessors, (32627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25609 states to 25609 states and 32627 transitions. [2021-12-15 09:44:11,649 INFO L78 Accepts]: Start accepts. Automaton has 25609 states and 32627 transitions. Word has length 205 [2021-12-15 09:44:11,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:11,650 INFO L470 AbstractCegarLoop]: Abstraction has 25609 states and 32627 transitions. [2021-12-15 09:44:11,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:11,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25609 states and 32627 transitions. [2021-12-15 09:44:11,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-12-15 09:44:11,655 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:11,655 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:11,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:44:11,655 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:11,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1008778777, now seen corresponding path program 1 times [2021-12-15 09:44:11,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655263435] [2021-12-15 09:44:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:11,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:11,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:11,771 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-12-15 09:44:11,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:11,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655263435] [2021-12-15 09:44:11,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655263435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:11,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:11,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:44:11,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071292446] [2021-12-15 09:44:11,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:11,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:11,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:11,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:11,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:11,773 INFO L87 Difference]: Start difference. First operand 25609 states and 32627 transitions. 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) [2021-12-15 09:44:14,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:14,840 INFO L93 Difference]: Finished difference Result 72457 states and 93057 transitions. [2021-12-15 09:44:14,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:14,845 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 228 [2021-12-15 09:44:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:14,942 INFO L225 Difference]: With dead ends: 72457 [2021-12-15 09:44:14,942 INFO L226 Difference]: Without dead ends: 47637 [2021-12-15 09:44:14,974 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:14,975 INFO L933 BasicCegarLoop]: 840 mSDtfsCounter, 856 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:14,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 987 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 09:44:15,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47637 states. [2021-12-15 09:44:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47637 to 43696. [2021-12-15 09:44:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43696 states, 43695 states have (on average 1.2125643666323378) internal successors, (52983), 43695 states have internal predecessors, (52983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43696 states to 43696 states and 52983 transitions. [2021-12-15 09:44:15,516 INFO L78 Accepts]: Start accepts. Automaton has 43696 states and 52983 transitions. Word has length 228 [2021-12-15 09:44:15,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:15,517 INFO L470 AbstractCegarLoop]: Abstraction has 43696 states and 52983 transitions. [2021-12-15 09:44:15,517 INFO L471 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) [2021-12-15 09:44:15,517 INFO L276 IsEmpty]: Start isEmpty. Operand 43696 states and 52983 transitions. [2021-12-15 09:44:15,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-12-15 09:44:15,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:15,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:15,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 09:44:15,520 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:15,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:15,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1728464337, now seen corresponding path program 1 times [2021-12-15 09:44:15,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:15,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150618988] [2021-12-15 09:44:15,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:15,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:15,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 166 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:15,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150618988] [2021-12-15 09:44:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150618988] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:15,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:15,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:15,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313137325] [2021-12-15 09:44:15,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:15,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:15,614 INFO L87 Difference]: Start difference. First operand 43696 states and 52983 transitions. Second operand has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:18,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:18,465 INFO L93 Difference]: Finished difference Result 104735 states and 126064 transitions. [2021-12-15 09:44:18,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:18,465 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 250 [2021-12-15 09:44:18,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:18,559 INFO L225 Difference]: With dead ends: 104735 [2021-12-15 09:44:18,559 INFO L226 Difference]: Without dead ends: 61828 [2021-12-15 09:44:18,598 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:18,599 INFO L933 BasicCegarLoop]: 1770 mSDtfsCounter, 769 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2541 mSolverCounterSat, 316 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1911 SdHoareTripleChecker+Invalid, 2857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 316 IncrementalHoareTripleChecker+Valid, 2541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:18,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1911 Invalid, 2857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [316 Valid, 2541 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 09:44:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61828 states. [2021-12-15 09:44:19,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61828 to 61800. [2021-12-15 09:44:19,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61800 states, 61799 states have (on average 1.1771064256703183) internal successors, (72744), 61799 states have internal predecessors, (72744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61800 states to 61800 states and 72744 transitions. [2021-12-15 09:44:19,804 INFO L78 Accepts]: Start accepts. Automaton has 61800 states and 72744 transitions. Word has length 250 [2021-12-15 09:44:19,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:19,805 INFO L470 AbstractCegarLoop]: Abstraction has 61800 states and 72744 transitions. [2021-12-15 09:44:19,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.33333333333333) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 61800 states and 72744 transitions. [2021-12-15 09:44:19,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 09:44:19,808 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:19,808 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:19,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:44:19,809 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:19,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:19,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1688259627, now seen corresponding path program 1 times [2021-12-15 09:44:19,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:19,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743326386] [2021-12-15 09:44:19,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:19,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:19,881 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:19,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743326386] [2021-12-15 09:44:19,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743326386] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:19,882 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:19,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:19,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832833393] [2021-12-15 09:44:19,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:19,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:19,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:19,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:19,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:19,883 INFO L87 Difference]: Start difference. First operand 61800 states and 72744 transitions. Second operand has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:22,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:22,539 INFO L93 Difference]: Finished difference Result 127516 states and 149548 transitions. [2021-12-15 09:44:22,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:22,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 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 252 [2021-12-15 09:44:22,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:22,621 INFO L225 Difference]: With dead ends: 127516 [2021-12-15 09:44:22,622 INFO L226 Difference]: Without dead ends: 64140 [2021-12-15 09:44:22,655 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:22,656 INFO L933 BasicCegarLoop]: 1500 mSDtfsCounter, 1034 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 2947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:22,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 1640 Invalid, 2947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:44:22,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64140 states. [2021-12-15 09:44:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64140 to 60193. [2021-12-15 09:44:23,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60193 states, 60192 states have (on average 1.121893274853801) internal successors, (67529), 60192 states have internal predecessors, (67529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:23,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60193 states to 60193 states and 67529 transitions. [2021-12-15 09:44:23,326 INFO L78 Accepts]: Start accepts. Automaton has 60193 states and 67529 transitions. Word has length 252 [2021-12-15 09:44:23,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:23,326 INFO L470 AbstractCegarLoop]: Abstraction has 60193 states and 67529 transitions. [2021-12-15 09:44:23,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:23,327 INFO L276 IsEmpty]: Start isEmpty. Operand 60193 states and 67529 transitions. [2021-12-15 09:44:23,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2021-12-15 09:44:23,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:23,329 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 09:44:23,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:44:23,329 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:23,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:23,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1480343591, now seen corresponding path program 1 times [2021-12-15 09:44:23,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:23,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245043171] [2021-12-15 09:44:23,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:23,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:23,522 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 74 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:44:23,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245043171] [2021-12-15 09:44:23,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245043171] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:44:23,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297055259] [2021-12-15 09:44:23,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:23,524 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:23,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:23,525 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) [2021-12-15 09:44:23,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:44:23,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:23,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:44:23,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:44:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:44:24,182 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:44:24,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297055259] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:24,186 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:44:24,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:44:24,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365758915] [2021-12-15 09:44:24,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:24,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:24,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:24,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:24,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:24,188 INFO L87 Difference]: Start difference. First operand 60193 states and 67529 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:26,909 INFO L93 Difference]: Finished difference Result 119595 states and 134263 transitions. [2021-12-15 09:44:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:26,909 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 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 279 [2021-12-15 09:44:26,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:26,985 INFO L225 Difference]: With dead ends: 119595 [2021-12-15 09:44:26,985 INFO L226 Difference]: Without dead ends: 60191 [2021-12-15 09:44:27,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:27,022 INFO L933 BasicCegarLoop]: 1343 mSDtfsCounter, 1164 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1422 SdHoareTripleChecker+Invalid, 2897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:27,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1164 Valid, 1422 Invalid, 2897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 09:44:27,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60191 states. [2021-12-15 09:44:27,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60191 to 59399. [2021-12-15 09:44:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59399 states, 59398 states have (on average 1.0937910367352437) internal successors, (64969), 59398 states have internal predecessors, (64969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:27,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59399 states to 59399 states and 64969 transitions. [2021-12-15 09:44:27,694 INFO L78 Accepts]: Start accepts. Automaton has 59399 states and 64969 transitions. Word has length 279 [2021-12-15 09:44:27,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:27,694 INFO L470 AbstractCegarLoop]: Abstraction has 59399 states and 64969 transitions. [2021-12-15 09:44:27,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:27,695 INFO L276 IsEmpty]: Start isEmpty. Operand 59399 states and 64969 transitions. [2021-12-15 09:44:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2021-12-15 09:44:27,711 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:27,711 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2021-12-15 09:44:27,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:44:27,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:27,929 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:27,929 INFO L85 PathProgramCache]: Analyzing trace with hash -2088185386, now seen corresponding path program 1 times [2021-12-15 09:44:27,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:27,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328532151] [2021-12-15 09:44:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:27,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:28,006 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-15 09:44:28,006 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:28,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328532151] [2021-12-15 09:44:28,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328532151] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:28,006 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:28,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:28,007 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511980338] [2021-12-15 09:44:28,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:28,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:28,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:28,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:28,008 INFO L87 Difference]: Start difference. First operand 59399 states and 64969 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:31,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:31,539 INFO L93 Difference]: Finished difference Result 136905 states and 150927 transitions. [2021-12-15 09:44:31,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:31,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 329 [2021-12-15 09:44:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:31,635 INFO L225 Difference]: With dead ends: 136905 [2021-12-15 09:44:31,636 INFO L226 Difference]: Without dead ends: 78295 [2021-12-15 09:44:31,667 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:31,667 INFO L933 BasicCegarLoop]: 1777 mSDtfsCounter, 826 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 2528 mSolverCounterSat, 718 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1918 SdHoareTripleChecker+Invalid, 3246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 718 IncrementalHoareTripleChecker+Valid, 2528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:31,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 1918 Invalid, 3246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [718 Valid, 2528 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-15 09:44:31,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78295 states. [2021-12-15 09:44:32,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78295 to 77504. [2021-12-15 09:44:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77504 states, 77503 states have (on average 1.081506522328168) internal successors, (83820), 77503 states have internal predecessors, (83820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:32,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77504 states to 77504 states and 83820 transitions. [2021-12-15 09:44:32,442 INFO L78 Accepts]: Start accepts. Automaton has 77504 states and 83820 transitions. Word has length 329 [2021-12-15 09:44:32,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:32,442 INFO L470 AbstractCegarLoop]: Abstraction has 77504 states and 83820 transitions. [2021-12-15 09:44:32,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:32,443 INFO L276 IsEmpty]: Start isEmpty. Operand 77504 states and 83820 transitions. [2021-12-15 09:44:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-15 09:44:32,447 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:32,448 INFO L514 BasicCegarLoop]: 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, 5, 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, 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, 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] [2021-12-15 09:44:32,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:44:32,448 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:32,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:32,448 INFO L85 PathProgramCache]: Analyzing trace with hash 692024033, now seen corresponding path program 1 times [2021-12-15 09:44:32,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:32,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335608532] [2021-12-15 09:44:32,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:32,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:32,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 462 proven. 0 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-15 09:44:32,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335608532] [2021-12-15 09:44:32,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335608532] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:32,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:32,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:32,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393797319] [2021-12-15 09:44:32,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:32,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:44:32,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:32,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:44:32,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:44:32,526 INFO L87 Difference]: Start difference. First operand 77504 states and 83820 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:38,219 INFO L93 Difference]: Finished difference Result 216602 states and 235003 transitions. [2021-12-15 09:44:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:44:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 386 [2021-12-15 09:44:38,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:38,396 INFO L225 Difference]: With dead ends: 216602 [2021-12-15 09:44:38,397 INFO L226 Difference]: Without dead ends: 139887 [2021-12-15 09:44:38,431 INFO L932 BasicCegarLoop]: 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 [2021-12-15 09:44:38,431 INFO L933 BasicCegarLoop]: 549 mSDtfsCounter, 1719 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 5980 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1719 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 7066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 5980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:38,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1719 Valid, 735 Invalid, 7066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 5980 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-15 09:44:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139887 states. [2021-12-15 09:44:39,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139887 to 137391. [2021-12-15 09:44:39,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137391 states, 137390 states have (on average 1.0783171992139167) internal successors, (148150), 137390 states have internal predecessors, (148150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:40,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137391 states to 137391 states and 148150 transitions. [2021-12-15 09:44:40,249 INFO L78 Accepts]: Start accepts. Automaton has 137391 states and 148150 transitions. Word has length 386 [2021-12-15 09:44:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:40,250 INFO L470 AbstractCegarLoop]: Abstraction has 137391 states and 148150 transitions. [2021-12-15 09:44:40,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:40,250 INFO L276 IsEmpty]: Start isEmpty. Operand 137391 states and 148150 transitions. [2021-12-15 09:44:40,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-15 09:44:40,263 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:40,265 INFO L514 BasicCegarLoop]: 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:44:40,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 09:44:40,265 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:40,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1699822566, now seen corresponding path program 1 times [2021-12-15 09:44:40,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:40,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758328003] [2021-12-15 09:44:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:40,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:40,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 287 proven. 110 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 09:44:40,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758328003] [2021-12-15 09:44:40,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758328003] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:44:40,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143803073] [2021-12-15 09:44:40,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:40,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:44:40,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:44:40,596 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) [2021-12-15 09:44:40,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:44:40,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:40,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:44:40,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:44:41,421 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 320 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 09:44:41,422 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:44:41,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143803073] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:41,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:44:41,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 09:44:41,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511165478] [2021-12-15 09:44:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:41,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:41,424 INFO L87 Difference]: Start difference. First operand 137391 states and 148150 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:44:45,222 INFO L93 Difference]: Finished difference Result 270042 states and 292931 transitions. [2021-12-15 09:44:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:44:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 386 [2021-12-15 09:44:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:44:45,496 INFO L225 Difference]: With dead ends: 270042 [2021-12-15 09:44:45,496 INFO L226 Difference]: Without dead ends: 149190 [2021-12-15 09:44:45,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 385 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-15 09:44:45,591 INFO L933 BasicCegarLoop]: 385 mSDtfsCounter, 1215 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 2260 mSolverCounterSat, 924 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1215 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 924 IncrementalHoareTripleChecker+Valid, 2260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 09:44:45,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1215 Valid, 401 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [924 Valid, 2260 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 09:44:45,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149190 states. [2021-12-15 09:44:47,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149190 to 149190. [2021-12-15 09:44:47,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149190 states, 149189 states have (on average 1.0780218380711715) internal successors, (160829), 149189 states have internal predecessors, (160829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:47,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149190 states to 149190 states and 160829 transitions. [2021-12-15 09:44:47,512 INFO L78 Accepts]: Start accepts. Automaton has 149190 states and 160829 transitions. Word has length 386 [2021-12-15 09:44:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:44:47,513 INFO L470 AbstractCegarLoop]: Abstraction has 149190 states and 160829 transitions. [2021-12-15 09:44:47,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:44:47,513 INFO L276 IsEmpty]: Start isEmpty. Operand 149190 states and 160829 transitions. [2021-12-15 09:44:47,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-12-15 09:44:47,518 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:44:47,518 INFO L514 BasicCegarLoop]: 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, 5, 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, 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, 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] [2021-12-15 09:44:47,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 09:44:47,731 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-15 09:44:47,743 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:44:47,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:44:47,743 INFO L85 PathProgramCache]: Analyzing trace with hash 486646981, now seen corresponding path program 1 times [2021-12-15 09:44:47,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:44:47,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779756] [2021-12-15 09:44:47,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:44:47,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:44:47,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:44:47,830 INFO L134 CoverageAnalysis]: Checked inductivity of 609 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-15 09:44:47,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:44:47,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779756] [2021-12-15 09:44:47,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779756] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:44:47,831 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:44:47,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:44:47,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389915671] [2021-12-15 09:44:47,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:44:47,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:44:47,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:44:47,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:44:47,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:44:47,832 INFO L87 Difference]: Start difference. First operand 149190 states and 160829 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)