./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem12_label22.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/Problem12_label22.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 d43cfdc29fde06b3f3db8e8550743c4a543837bf593795daae105a797554d3b1 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:41:08,194 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:41:08,195 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:41:08,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:41:08,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:41:08,225 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:41:08,226 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:41:08,228 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:41:08,230 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:41:08,231 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:41:08,232 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:41:08,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:41:08,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:41:08,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:41:08,238 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:41:08,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:41:08,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:41:08,240 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:41:08,241 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:41:08,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:41:08,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:41:08,249 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:41:08,250 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:41:08,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:41:08,253 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:41:08,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:41:08,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:41:08,254 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:41:08,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:41:08,255 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:41:08,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:41:08,256 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:41:08,257 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:41:08,258 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:41:08,259 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:41:08,260 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:41:08,261 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:41:08,261 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:41:08,261 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:41:08,262 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:41:08,263 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:41:08,264 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:41:08,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:41:08,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:41:08,288 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:41:08,289 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:41:08,289 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:41:08,290 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:41:08,290 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:41:08,291 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:41:08,291 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:41:08,291 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:41:08,292 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:41:08,292 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:41:08,292 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:41:08,292 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:41:08,292 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:41:08,293 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:41:08,294 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:41:08,294 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:41:08,294 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:41:08,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:41:08,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:41:08,295 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:41:08,296 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:41:08,296 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:41:08,296 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:41:08,297 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:41:08,297 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:41:08,297 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:41:08,297 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:41:08,297 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d43cfdc29fde06b3f3db8e8550743c4a543837bf593795daae105a797554d3b1 [2021-12-15 22:41:08,518 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:41:08,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:41:08,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:41:08,537 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:41:08,538 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:41:08,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2021-12-15 22:41:08,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204123bb4/96899c6dd356400c81e9c12fb6b8d370/FLAGa5a810f24 [2021-12-15 22:41:09,217 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:41:09,218 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem12_label22.c [2021-12-15 22:41:09,248 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204123bb4/96899c6dd356400c81e9c12fb6b8d370/FLAGa5a810f24 [2021-12-15 22:41:09,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204123bb4/96899c6dd356400c81e9c12fb6b8d370 [2021-12-15 22:41:09,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:41:09,406 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:41:09,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:41:09,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:41:09,411 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:41:09,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:41:09" (1/1) ... [2021-12-15 22:41:09,413 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14221207 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:09, skipping insertion in model container [2021-12-15 22:41:09,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:41:09" (1/1) ... [2021-12-15 22:41:09,419 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:41:09,520 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:41:09,799 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/Problem12_label22.c[7880,7893] [2021-12-15 22:41:10,493 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:41:10,504 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:41:10,528 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/Problem12_label22.c[7880,7893] [2021-12-15 22:41:10,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:41:10,920 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:41:10,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10 WrapperNode [2021-12-15 22:41:10,922 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:41:10,923 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:41:10,923 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:41:10,923 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:41:10,929 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:10,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,289 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 4757 [2021-12-15 22:41:11,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:41:11,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:41:11,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:41:11,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:41:11,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,388 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,389 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,579 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:41:11,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:41:11,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:41:11,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:41:11,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (1/1) ... [2021-12-15 22:41:11,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:41:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:41:11,732 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 22:41:11,737 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 22:41:11,765 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:41:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:41:11,766 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:41:11,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:41:11,840 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:41:11,841 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:41:15,222 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:41:15,243 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:41:15,243 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:41:15,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:41:15 BoogieIcfgContainer [2021-12-15 22:41:15,247 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:41:15,250 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:41:15,250 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:41:15,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:41:15,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:41:09" (1/3) ... [2021-12-15 22:41:15,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e12fe74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:41:15, skipping insertion in model container [2021-12-15 22:41:15,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:41:10" (2/3) ... [2021-12-15 22:41:15,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e12fe74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:41:15, skipping insertion in model container [2021-12-15 22:41:15,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:41:15" (3/3) ... [2021-12-15 22:41:15,256 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label22.c [2021-12-15 22:41:15,260 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:41:15,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:41:15,318 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:41:15,329 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 22:41:15,329 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:41:15,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 22:41:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-15 22:41:15,368 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:15,368 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, 1, 1, 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 22:41:15,369 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:15,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:15,374 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-12-15 22:41:15,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:15,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308886394] [2021-12-15 22:41:15,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:15,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:15,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:15,735 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 22:41:15,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:15,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308886394] [2021-12-15 22:41:15,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308886394] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:15,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:15,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:15,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790966502] [2021-12-15 22:41:15,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:15,743 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:15,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:15,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:15,772 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:41:21,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:21,952 INFO L93 Difference]: Finished difference Result 3142 states and 6130 transitions. [2021-12-15 22:41:21,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:21,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-12-15 22:41:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:21,995 INFO L225 Difference]: With dead ends: 3142 [2021-12-15 22:41:21,996 INFO L226 Difference]: Without dead ends: 2257 [2021-12-15 22:41:22,005 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 22:41:22,014 INFO L933 BasicCegarLoop]: 738 mSDtfsCounter, 2185 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5499 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2185 SdHoareTripleChecker+Valid, 765 SdHoareTripleChecker+Invalid, 6780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 5499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:22,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2185 Valid, 765 Invalid, 6780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 5499 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-15 22:41:22,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2257 states. [2021-12-15 22:41:22,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2257 to 2257. [2021-12-15 22:41:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2257 states, 2256 states have (on average 1.5749113475177305) internal successors, (3553), 2256 states have internal predecessors, (3553), 0 states have call successors, (0), 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 22:41:22,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2257 states to 2257 states and 3553 transitions. [2021-12-15 22:41:22,153 INFO L78 Accepts]: Start accepts. Automaton has 2257 states and 3553 transitions. Word has length 64 [2021-12-15 22:41:22,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:22,153 INFO L470 AbstractCegarLoop]: Abstraction has 2257 states and 3553 transitions. [2021-12-15 22:41:22,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:41:22,154 INFO L276 IsEmpty]: Start isEmpty. Operand 2257 states and 3553 transitions. [2021-12-15 22:41:22,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-12-15 22:41:22,162 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:22,162 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, 2, 2, 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] [2021-12-15 22:41:22,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:41:22,163 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:22,165 INFO L85 PathProgramCache]: Analyzing trace with hash 2079799393, now seen corresponding path program 1 times [2021-12-15 22:41:22,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71438071] [2021-12-15 22:41:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:22,167 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:22,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:41:22,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71438071] [2021-12-15 22:41:22,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71438071] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:22,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:22,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:22,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606979989] [2021-12-15 22:41:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:22,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:22,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:22,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:22,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:22,332 INFO L87 Difference]: Start difference. First operand 2257 states and 3553 transitions. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 22:41:25,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:25,903 INFO L93 Difference]: Finished difference Result 6051 states and 9916 transitions. [2021-12-15 22:41:25,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:25,904 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 135 [2021-12-15 22:41:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:25,920 INFO L225 Difference]: With dead ends: 6051 [2021-12-15 22:41:25,920 INFO L226 Difference]: Without dead ends: 3759 [2021-12-15 22:41:25,924 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 22:41:25,926 INFO L933 BasicCegarLoop]: 674 mSDtfsCounter, 705 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3095 mSolverCounterSat, 729 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 705 SdHoareTripleChecker+Valid, 688 SdHoareTripleChecker+Invalid, 3824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 729 IncrementalHoareTripleChecker+Valid, 3095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:25,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [705 Valid, 688 Invalid, 3824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [729 Valid, 3095 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-15 22:41:25,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3759 states. [2021-12-15 22:41:25,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3759 to 3008. [2021-12-15 22:41:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4319920186232125) internal successors, (4306), 3007 states have internal predecessors, (4306), 0 states have call successors, (0), 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 22:41:25,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4306 transitions. [2021-12-15 22:41:25,995 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4306 transitions. Word has length 135 [2021-12-15 22:41:25,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:25,996 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4306 transitions. [2021-12-15 22:41:25,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 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 22:41:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4306 transitions. [2021-12-15 22:41:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-15 22:41:26,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:26,000 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:26,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:41:26,001 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:26,001 INFO L85 PathProgramCache]: Analyzing trace with hash 357807558, now seen corresponding path program 1 times [2021-12-15 22:41:26,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:26,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256484148] [2021-12-15 22:41:26,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:26,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 22:41:26,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:26,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256484148] [2021-12-15 22:41:26,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256484148] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:26,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:26,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:41:26,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982580519] [2021-12-15 22:41:26,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:26,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:26,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:26,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:26,235 INFO L87 Difference]: Start difference. First operand 3008 states and 4306 transitions. Second operand has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:41:28,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:28,575 INFO L93 Difference]: Finished difference Result 8267 states and 11519 transitions. [2021-12-15 22:41:28,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:28,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 274 [2021-12-15 22:41:28,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:28,594 INFO L225 Difference]: With dead ends: 8267 [2021-12-15 22:41:28,594 INFO L226 Difference]: Without dead ends: 5261 [2021-12-15 22:41:28,599 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 22:41:28,600 INFO L933 BasicCegarLoop]: 421 mSDtfsCounter, 697 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1973 mSolverCounterSat, 798 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 2771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 798 IncrementalHoareTripleChecker+Valid, 1973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:28,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [697 Valid, 427 Invalid, 2771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [798 Valid, 1973 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:41:28,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2021-12-15 22:41:28,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 5261. [2021-12-15 22:41:28,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5261 states, 5260 states have (on average 1.1982889733840305) internal successors, (6303), 5260 states have internal predecessors, (6303), 0 states have call successors, (0), 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 22:41:28,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5261 states to 5261 states and 6303 transitions. [2021-12-15 22:41:28,680 INFO L78 Accepts]: Start accepts. Automaton has 5261 states and 6303 transitions. Word has length 274 [2021-12-15 22:41:28,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:28,680 INFO L470 AbstractCegarLoop]: Abstraction has 5261 states and 6303 transitions. [2021-12-15 22:41:28,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) internal successors, (207), 2 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:41:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 5261 states and 6303 transitions. [2021-12-15 22:41:28,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-12-15 22:41:28,687 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:28,688 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:28,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:41:28,688 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:28,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:28,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1396902847, now seen corresponding path program 1 times [2021-12-15 22:41:28,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:28,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378541706] [2021-12-15 22:41:28,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:28,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:28,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:28,875 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 123 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:41:28,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:28,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378541706] [2021-12-15 22:41:28,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378541706] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:28,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:28,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:28,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416941944] [2021-12-15 22:41:28,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:28,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:41:28,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:28,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:41:28,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:41:28,881 INFO L87 Difference]: Start difference. First operand 5261 states and 6303 transitions. Second operand has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:41:31,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:31,931 INFO L93 Difference]: Finished difference Result 12061 states and 15068 transitions. [2021-12-15 22:41:31,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:41:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 276 [2021-12-15 22:41:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:31,954 INFO L225 Difference]: With dead ends: 12061 [2021-12-15 22:41:31,955 INFO L226 Difference]: Without dead ends: 7516 [2021-12-15 22:41:31,962 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 22:41:31,972 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 776 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 3718 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 4260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 3718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:31,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 327 Invalid, 4260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 3718 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-15 22:41:31,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7516 states. [2021-12-15 22:41:32,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7516 to 7514. [2021-12-15 22:41:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7514 states, 7513 states have (on average 1.1812857713296951) internal successors, (8875), 7513 states have internal predecessors, (8875), 0 states have call successors, (0), 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 22:41:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7514 states to 7514 states and 8875 transitions. [2021-12-15 22:41:32,100 INFO L78 Accepts]: Start accepts. Automaton has 7514 states and 8875 transitions. Word has length 276 [2021-12-15 22:41:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:32,101 INFO L470 AbstractCegarLoop]: Abstraction has 7514 states and 8875 transitions. [2021-12-15 22:41:32,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.75) internal successors, (207), 3 states have internal predecessors, (207), 0 states have call successors, (0), 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 22:41:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 7514 states and 8875 transitions. [2021-12-15 22:41:32,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-12-15 22:41:32,107 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:32,107 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:41:32,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:41:32,107 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:32,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:32,109 INFO L85 PathProgramCache]: Analyzing trace with hash -522510421, now seen corresponding path program 1 times [2021-12-15 22:41:32,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:32,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627437154] [2021-12-15 22:41:32,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:32,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:32,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:32,403 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:41:32,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:32,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627437154] [2021-12-15 22:41:32,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627437154] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:32,404 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:32,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:32,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035983565] [2021-12-15 22:41:32,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:32,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:32,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:32,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:32,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:32,407 INFO L87 Difference]: Start difference. First operand 7514 states and 8875 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 22:41:34,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:34,990 INFO L93 Difference]: Finished difference Result 16528 states and 20146 transitions. [2021-12-15 22:41:34,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 353 [2021-12-15 22:41:34,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:35,020 INFO L225 Difference]: With dead ends: 16528 [2021-12-15 22:41:35,021 INFO L226 Difference]: Without dead ends: 9767 [2021-12-15 22:41:35,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 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 22:41:35,032 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 826 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2029 mSolverCounterSat, 989 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 989 IncrementalHoareTripleChecker+Valid, 2029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:35,032 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [826 Valid, 139 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [989 Valid, 2029 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:41:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-12-15 22:41:35,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-12-15 22:41:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.207352037681753) internal successors, (11791), 9766 states have internal predecessors, (11791), 0 states have call successors, (0), 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 22:41:35,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 11791 transitions. [2021-12-15 22:41:35,218 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 11791 transitions. Word has length 353 [2021-12-15 22:41:35,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:35,219 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 11791 transitions. [2021-12-15 22:41:35,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 22:41:35,223 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 11791 transitions. [2021-12-15 22:41:35,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-15 22:41:35,229 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:35,229 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, 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, 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] [2021-12-15 22:41:35,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:41:35,230 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:35,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:35,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1140799087, now seen corresponding path program 1 times [2021-12-15 22:41:35,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:35,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043614812] [2021-12-15 22:41:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:35,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:35,393 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-15 22:41:35,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:35,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043614812] [2021-12-15 22:41:35,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043614812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:35,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:35,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:35,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867021323] [2021-12-15 22:41:35,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:35,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:35,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:35,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:35,396 INFO L87 Difference]: Start difference. First operand 9767 states and 11791 transitions. Second operand has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:41:37,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:37,803 INFO L93 Difference]: Finished difference Result 21034 states and 25744 transitions. [2021-12-15 22:41:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 377 [2021-12-15 22:41:37,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:37,827 INFO L225 Difference]: With dead ends: 21034 [2021-12-15 22:41:37,827 INFO L226 Difference]: Without dead ends: 12020 [2021-12-15 22:41:37,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 22:41:37,838 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 780 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 2891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:37,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 105 Invalid, 2891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-15 22:41:37,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12020 states. [2021-12-15 22:41:37,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12020 to 12020. [2021-12-15 22:41:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.1926116981446044) internal successors, (14334), 12019 states have internal predecessors, (14334), 0 states have call successors, (0), 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 22:41:37,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14334 transitions. [2021-12-15 22:41:37,994 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14334 transitions. Word has length 377 [2021-12-15 22:41:37,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:37,995 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14334 transitions. [2021-12-15 22:41:37,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 22:41:37,996 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14334 transitions. [2021-12-15 22:41:38,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-12-15 22:41:38,002 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:38,003 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:41:38,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:41:38,003 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:38,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:38,004 INFO L85 PathProgramCache]: Analyzing trace with hash -370054870, now seen corresponding path program 1 times [2021-12-15 22:41:38,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:38,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487549087] [2021-12-15 22:41:38,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:38,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:38,114 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 376 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-12-15 22:41:38,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:38,115 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487549087] [2021-12-15 22:41:38,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487549087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:38,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:38,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:38,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713339090] [2021-12-15 22:41:38,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:38,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:38,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:38,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:38,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:38,117 INFO L87 Difference]: Start difference. First operand 12020 states and 14334 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 22:41:40,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:40,941 INFO L93 Difference]: Finished difference Result 33801 states and 40725 transitions. [2021-12-15 22:41:40,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:40,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 391 [2021-12-15 22:41:40,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:40,985 INFO L225 Difference]: With dead ends: 33801 [2021-12-15 22:41:40,985 INFO L226 Difference]: Without dead ends: 22534 [2021-12-15 22:41:40,998 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 22:41:40,999 INFO L933 BasicCegarLoop]: 1322 mSDtfsCounter, 636 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 375 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 636 SdHoareTripleChecker+Valid, 1329 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 375 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:40,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [636 Valid, 1329 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [375 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:41:41,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22534 states. [2021-12-15 22:41:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22534 to 21783. [2021-12-15 22:41:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21783 states, 21782 states have (on average 1.1774400881461757) internal successors, (25647), 21782 states have internal predecessors, (25647), 0 states have call successors, (0), 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 22:41:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21783 states to 21783 states and 25647 transitions. [2021-12-15 22:41:41,294 INFO L78 Accepts]: Start accepts. Automaton has 21783 states and 25647 transitions. Word has length 391 [2021-12-15 22:41:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:41,295 INFO L470 AbstractCegarLoop]: Abstraction has 21783 states and 25647 transitions. [2021-12-15 22:41:41,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 22:41:41,296 INFO L276 IsEmpty]: Start isEmpty. Operand 21783 states and 25647 transitions. [2021-12-15 22:41:41,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2021-12-15 22:41:41,303 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:41,304 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, 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, 2, 2, 2, 2, 2, 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] [2021-12-15 22:41:41,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:41:41,304 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:41,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1540892133, now seen corresponding path program 1 times [2021-12-15 22:41:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:41,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874173181] [2021-12-15 22:41:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:41,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 86 proven. 99 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-15 22:41:41,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874173181] [2021-12-15 22:41:41,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874173181] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:41:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257963728] [2021-12-15 22:41:41,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:41,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:41:41,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:41:41,559 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 22:41:41,562 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 22:41:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:41,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 532 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:41:41,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:41:42,250 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-12-15 22:41:42,250 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:41:42,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257963728] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:42,251 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:41:42,251 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-15 22:41:42,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600799726] [2021-12-15 22:41:42,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:42,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:42,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:42,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:42,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:41:42,253 INFO L87 Difference]: Start difference. First operand 21783 states and 25647 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 22:41:44,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:44,897 INFO L93 Difference]: Finished difference Result 59335 states and 70698 transitions. [2021-12-15 22:41:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:44,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 392 [2021-12-15 22:41:44,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:44,961 INFO L225 Difference]: With dead ends: 59335 [2021-12-15 22:41:44,961 INFO L226 Difference]: Without dead ends: 38305 [2021-12-15 22:41:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 391 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:41:44,982 INFO L933 BasicCegarLoop]: 1369 mSDtfsCounter, 698 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2186 mSolverCounterSat, 680 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1377 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 680 IncrementalHoareTripleChecker+Valid, 2186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:44,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [698 Valid, 1377 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [680 Valid, 2186 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:41:45,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38305 states. [2021-12-15 22:41:45,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38305 to 36052. [2021-12-15 22:41:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36052 states, 36051 states have (on average 1.1419100718426674) internal successors, (41167), 36051 states have internal predecessors, (41167), 0 states have call successors, (0), 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 22:41:45,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36052 states to 36052 states and 41167 transitions. [2021-12-15 22:41:45,455 INFO L78 Accepts]: Start accepts. Automaton has 36052 states and 41167 transitions. Word has length 392 [2021-12-15 22:41:45,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:45,456 INFO L470 AbstractCegarLoop]: Abstraction has 36052 states and 41167 transitions. [2021-12-15 22:41:45,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 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 22:41:45,456 INFO L276 IsEmpty]: Start isEmpty. Operand 36052 states and 41167 transitions. [2021-12-15 22:41:45,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2021-12-15 22:41:45,462 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:45,462 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:41:45,493 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 22:41:45,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:41:45,682 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash -346326368, now seen corresponding path program 1 times [2021-12-15 22:41:45,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667106329] [2021-12-15 22:41:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:45,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:45,816 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-15 22:41:45,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:45,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667106329] [2021-12-15 22:41:45,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667106329] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:45,818 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:45,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:45,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963832034] [2021-12-15 22:41:45,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:45,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:45,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:45,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:45,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:45,821 INFO L87 Difference]: Start difference. First operand 36052 states and 41167 transitions. Second operand has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 22:41:48,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:48,581 INFO L93 Difference]: Finished difference Result 87873 states and 101087 transitions. [2021-12-15 22:41:48,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:48,581 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 395 [2021-12-15 22:41:48,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:48,646 INFO L225 Difference]: With dead ends: 87873 [2021-12-15 22:41:48,646 INFO L226 Difference]: Without dead ends: 52574 [2021-12-15 22:41:48,669 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 22:41:48,670 INFO L933 BasicCegarLoop]: 328 mSDtfsCounter, 710 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2470 mSolverCounterSat, 457 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 710 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 2927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 457 IncrementalHoareTripleChecker+Valid, 2470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:48,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [710 Valid, 335 Invalid, 2927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [457 Valid, 2470 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-15 22:41:48,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52574 states. [2021-12-15 22:41:49,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52574 to 50321. [2021-12-15 22:41:49,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50321 states, 50320 states have (on average 1.1420906200317964) internal successors, (57470), 50320 states have internal predecessors, (57470), 0 states have call successors, (0), 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 22:41:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50321 states to 50321 states and 57470 transitions. [2021-12-15 22:41:49,319 INFO L78 Accepts]: Start accepts. Automaton has 50321 states and 57470 transitions. Word has length 395 [2021-12-15 22:41:49,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:49,320 INFO L470 AbstractCegarLoop]: Abstraction has 50321 states and 57470 transitions. [2021-12-15 22:41:49,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.66666666666667) internal successors, (212), 3 states have internal predecessors, (212), 0 states have call successors, (0), 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 22:41:49,320 INFO L276 IsEmpty]: Start isEmpty. Operand 50321 states and 57470 transitions. [2021-12-15 22:41:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-12-15 22:41:49,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:49,331 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:49,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:41:49,332 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:49,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash -369619252, now seen corresponding path program 1 times [2021-12-15 22:41:49,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:49,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516194588] [2021-12-15 22:41:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:49,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:49,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 775 backedges. 615 proven. 0 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2021-12-15 22:41:49,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:49,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516194588] [2021-12-15 22:41:49,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516194588] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:49,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:49,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:49,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264954612] [2021-12-15 22:41:49,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:49,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:49,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:49,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:49,586 INFO L87 Difference]: Start difference. First operand 50321 states and 57470 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 22:41:52,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:52,386 INFO L93 Difference]: Finished difference Result 124672 states and 144149 transitions. [2021-12-15 22:41:52,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:52,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 483 [2021-12-15 22:41:52,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:52,483 INFO L225 Difference]: With dead ends: 124672 [2021-12-15 22:41:52,483 INFO L226 Difference]: Without dead ends: 75104 [2021-12-15 22:41:52,525 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 22:41:52,526 INFO L933 BasicCegarLoop]: 1129 mSDtfsCounter, 754 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 762 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 762 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:52,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 1136 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [762 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:41:52,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75104 states. [2021-12-15 22:41:53,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75104 to 70598. [2021-12-15 22:41:53,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70598 states, 70597 states have (on average 1.1449495021034888) internal successors, (80830), 70597 states have internal predecessors, (80830), 0 states have call successors, (0), 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 22:41:53,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 80830 transitions. [2021-12-15 22:41:53,497 INFO L78 Accepts]: Start accepts. Automaton has 70598 states and 80830 transitions. Word has length 483 [2021-12-15 22:41:53,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:53,498 INFO L470 AbstractCegarLoop]: Abstraction has 70598 states and 80830 transitions. [2021-12-15 22:41:53,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 22:41:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 70598 states and 80830 transitions. [2021-12-15 22:41:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-12-15 22:41:53,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:53,515 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:53,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:41:53,515 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:53,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:53,516 INFO L85 PathProgramCache]: Analyzing trace with hash -12070787, now seen corresponding path program 1 times [2021-12-15 22:41:53,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:53,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751036939] [2021-12-15 22:41:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:53,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:53,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-12-15 22:41:53,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:53,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751036939] [2021-12-15 22:41:53,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751036939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:53,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:53,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:53,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690460093] [2021-12-15 22:41:53,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:53,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:53,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:53,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:53,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:53,676 INFO L87 Difference]: Start difference. First operand 70598 states and 80830 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 22:41:56,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:41:56,940 INFO L93 Difference]: Finished difference Result 141945 states and 162403 transitions. [2021-12-15 22:41:56,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:41:56,941 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 497 [2021-12-15 22:41:56,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:41:57,022 INFO L225 Difference]: With dead ends: 141945 [2021-12-15 22:41:57,023 INFO L226 Difference]: Without dead ends: 72100 [2021-12-15 22:41:57,059 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 22:41:57,060 INFO L933 BasicCegarLoop]: 1179 mSDtfsCounter, 694 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2407 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 694 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 2407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:41:57,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [694 Valid, 1187 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 2407 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-15 22:41:57,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72100 states. [2021-12-15 22:41:57,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72100 to 70598. [2021-12-15 22:41:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70598 states, 70597 states have (on average 1.125855206311883) internal successors, (79482), 70597 states have internal predecessors, (79482), 0 states have call successors, (0), 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 22:41:58,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70598 states to 70598 states and 79482 transitions. [2021-12-15 22:41:58,099 INFO L78 Accepts]: Start accepts. Automaton has 70598 states and 79482 transitions. Word has length 497 [2021-12-15 22:41:58,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:41:58,100 INFO L470 AbstractCegarLoop]: Abstraction has 70598 states and 79482 transitions. [2021-12-15 22:41:58,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 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 22:41:58,100 INFO L276 IsEmpty]: Start isEmpty. Operand 70598 states and 79482 transitions. [2021-12-15 22:41:58,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-12-15 22:41:58,127 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:41:58,128 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:41:58,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:41:58,129 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:41:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:41:58,129 INFO L85 PathProgramCache]: Analyzing trace with hash -70544315, now seen corresponding path program 1 times [2021-12-15 22:41:58,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:41:58,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881837443] [2021-12-15 22:41:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:41:58,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:41:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:41:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 792 backedges. 618 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2021-12-15 22:41:58,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:41:58,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881837443] [2021-12-15 22:41:58,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881837443] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:41:58,374 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:41:58,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:41:58,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32078920] [2021-12-15 22:41:58,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:41:58,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:41:58,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:41:58,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:41:58,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:41:58,376 INFO L87 Difference]: Start difference. First operand 70598 states and 79482 transitions. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 22:42:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:42:01,387 INFO L93 Difference]: Finished difference Result 186254 states and 210135 transitions. [2021-12-15 22:42:01,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:42:01,387 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 501 [2021-12-15 22:42:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:42:01,535 INFO L225 Difference]: With dead ends: 186254 [2021-12-15 22:42:01,535 INFO L226 Difference]: Without dead ends: 116409 [2021-12-15 22:42:01,572 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 22:42:01,572 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 665 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 665 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:42:01,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [665 Valid, 1269 Invalid, 2817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-15 22:42:01,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116409 states. [2021-12-15 22:42:02,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116409 to 114156. [2021-12-15 22:42:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114156 states, 114155 states have (on average 1.1025885856948885) internal successors, (125866), 114155 states have internal predecessors, (125866), 0 states have call successors, (0), 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 22:42:03,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114156 states to 114156 states and 125866 transitions. [2021-12-15 22:42:03,052 INFO L78 Accepts]: Start accepts. Automaton has 114156 states and 125866 transitions. Word has length 501 [2021-12-15 22:42:03,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:42:03,067 INFO L470 AbstractCegarLoop]: Abstraction has 114156 states and 125866 transitions. [2021-12-15 22:42:03,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 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 22:42:03,068 INFO L276 IsEmpty]: Start isEmpty. Operand 114156 states and 125866 transitions. [2021-12-15 22:42:03,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 538 [2021-12-15 22:42:03,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:42:03,092 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:42:03,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:42:03,092 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:42:03,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:42:03,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1729829438, now seen corresponding path program 1 times [2021-12-15 22:42:03,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:42:03,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495545612] [2021-12-15 22:42:03,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:42:03,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:42:03,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:42:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1043 backedges. 728 proven. 0 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2021-12-15 22:42:03,308 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:42:03,308 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495545612] [2021-12-15 22:42:03,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495545612] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:42:03,308 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:42:03,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:42:03,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028584610] [2021-12-15 22:42:03,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:42:03,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:42:03,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:42:03,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:42:03,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:42:03,311 INFO L87 Difference]: Start difference. First operand 114156 states and 125866 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)