./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label47.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/Problem15_label47.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 40f8e49b469936b4286df83be23bbd8a096771e97cd4be5bea6d42464ea1ae03 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:54:29,177 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:54:29,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:54:29,210 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:54:29,211 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:54:29,212 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:54:29,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:54:29,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:54:29,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:54:29,217 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:54:29,217 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:54:29,218 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:54:29,220 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:54:29,222 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:54:29,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:54:29,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:54:29,229 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:54:29,230 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:54:29,236 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:54:29,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:54:29,239 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:54:29,245 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:54:29,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:54:29,247 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:54:29,249 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:54:29,252 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:54:29,252 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:54:29,253 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:54:29,254 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:54:29,254 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:54:29,255 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:54:29,255 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:54:29,259 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:54:29,260 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:54:29,261 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:54:29,261 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:54:29,262 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:54:29,262 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:54:29,262 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:54:29,264 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:54:29,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:54:29,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:54:29,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:54:29,302 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:54:29,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:54:29,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:54:29,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:54:29,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:54:29,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:54:29,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:54:29,305 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:54:29,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:54:29,306 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:54:29,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:54:29,308 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:54:29,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:54:29,308 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:54:29,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:54:29,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:54:29,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:54:29,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:54:29,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:54:29,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:54:29,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:54:29,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:54:29,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:54:29,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:54:29,310 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:54:29,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:54:29,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:54:29,311 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:54:29,311 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 40f8e49b469936b4286df83be23bbd8a096771e97cd4be5bea6d42464ea1ae03 [2021-12-15 22:54:29,522 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:54:29,553 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:54:29,556 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:54:29,557 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:54:29,557 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:54:29,558 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label47.c [2021-12-15 22:54:29,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c61b70e/ccb9f04dbc7b4483a435610504e30be7/FLAG8215afb0d [2021-12-15 22:54:30,153 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:54:30,154 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label47.c [2021-12-15 22:54:30,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c61b70e/ccb9f04dbc7b4483a435610504e30be7/FLAG8215afb0d [2021-12-15 22:54:30,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/00c61b70e/ccb9f04dbc7b4483a435610504e30be7 [2021-12-15 22:54:30,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:54:30,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:54:30,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:54:30,431 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:54:30,434 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:54:30,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:54:30" (1/1) ... [2021-12-15 22:54:30,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3782daa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:30, skipping insertion in model container [2021-12-15 22:54:30,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:54:30" (1/1) ... [2021-12-15 22:54:30,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:54:30,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:54:30,703 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/Problem15_label47.c[1373,1386] [2021-12-15 22:54:31,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:54:31,085 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:54:31,099 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/Problem15_label47.c[1373,1386] [2021-12-15 22:54:31,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:54:31,306 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:54:31,307 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31 WrapperNode [2021-12-15 22:54:31,307 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:54:31,308 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:54:31,309 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:54:31,309 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:54:31,315 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,352 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,521 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-15 22:54:31,521 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:54:31,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:54:31,522 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:54:31,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:54:31,530 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,530 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,556 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,556 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,683 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:54:31,748 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:54:31,748 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:54:31,748 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:54:31,749 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (1/1) ... [2021-12-15 22:54:31,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:54:31,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:54:31,813 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 22:54:31,825 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 22:54:31,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:54:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:54:31,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:54:31,847 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:54:31,908 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:54:31,909 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:54:34,095 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:54:34,105 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:54:34,105 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:54:34,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:54:34 BoogieIcfgContainer [2021-12-15 22:54:34,114 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:54:34,116 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:54:34,116 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:54:34,119 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:54:34,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:54:30" (1/3) ... [2021-12-15 22:54:34,120 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b792449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:54:34, skipping insertion in model container [2021-12-15 22:54:34,120 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:54:31" (2/3) ... [2021-12-15 22:54:34,121 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b792449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:54:34, skipping insertion in model container [2021-12-15 22:54:34,121 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:54:34" (3/3) ... [2021-12-15 22:54:34,122 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label47.c [2021-12-15 22:54:34,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:54:34,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:54:34,184 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:54:34,191 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 22:54:34,192 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:54:34,221 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 22:54:34,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-15 22:54:34,230 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:34,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:54:34,232 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:34,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:34,237 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-12-15 22:54:34,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:34,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025598762] [2021-12-15 22:54:34,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:34,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:34,412 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 22:54:34,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:34,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025598762] [2021-12-15 22:54:34,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025598762] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:34,414 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:34,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:54:34,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863183286] [2021-12-15 22:54:34,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:34,420 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:34,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:34,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:34,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:34,445 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 22:54:36,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:36,229 INFO L93 Difference]: Finished difference Result 1155 states and 2106 transitions. [2021-12-15 22:54:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:36,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-15 22:54:36,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:36,263 INFO L225 Difference]: With dead ends: 1155 [2021-12-15 22:54:36,263 INFO L226 Difference]: Without dead ends: 667 [2021-12-15 22:54:36,271 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 22:54:36,276 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 335 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:36,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 371 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [345 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:54:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-12-15 22:54:36,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 665. [2021-12-15 22:54:36,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 664 states have (on average 1.4789156626506024) internal successors, (982), 664 states have internal predecessors, (982), 0 states have call successors, (0), 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 22:54:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 982 transitions. [2021-12-15 22:54:36,349 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 982 transitions. Word has length 9 [2021-12-15 22:54:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:36,349 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 982 transitions. [2021-12-15 22:54:36,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 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 22:54:36,350 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 982 transitions. [2021-12-15 22:54:36,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-12-15 22:54:36,352 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:36,352 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 22:54:36,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:54:36,353 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1812470943, now seen corresponding path program 1 times [2021-12-15 22:54:36,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:36,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048201433] [2021-12-15 22:54:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:36,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:36,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:36,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:54:36,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:36,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048201433] [2021-12-15 22:54:36,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048201433] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:36,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:36,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:54:36,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186765273] [2021-12-15 22:54:36,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:36,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:36,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:36,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:36,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:36,519 INFO L87 Difference]: Start difference. First operand 665 states and 982 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 22:54:38,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:38,244 INFO L93 Difference]: Finished difference Result 1931 states and 2857 transitions. [2021-12-15 22:54:38,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:38,252 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 84 [2021-12-15 22:54:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:38,258 INFO L225 Difference]: With dead ends: 1931 [2021-12-15 22:54:38,259 INFO L226 Difference]: Without dead ends: 1268 [2021-12-15 22:54:38,260 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 22:54:38,261 INFO L933 BasicCegarLoop]: 320 mSDtfsCounter, 240 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:38,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 366 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:54:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2021-12-15 22:54:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1266. [2021-12-15 22:54:38,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 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 22:54:38,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-15 22:54:38,300 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 84 [2021-12-15 22:54:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:38,300 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-15 22:54:38,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 2 states have internal predecessors, (84), 0 states have call successors, (0), 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 22:54:38,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-15 22:54:38,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-12-15 22:54:38,310 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:38,310 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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 22:54:38,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:54:38,311 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:38,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1084535690, now seen corresponding path program 1 times [2021-12-15 22:54:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334139969] [2021-12-15 22:54:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:38,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 22:54:38,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:38,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334139969] [2021-12-15 22:54:38,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334139969] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:38,474 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:38,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:54:38,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342973646] [2021-12-15 22:54:38,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:38,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:38,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:38,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:38,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:38,476 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 22:54:39,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:39,881 INFO L93 Difference]: Finished difference Result 3436 states and 4550 transitions. [2021-12-15 22:54:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:39,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 175 [2021-12-15 22:54:39,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:39,890 INFO L225 Difference]: With dead ends: 3436 [2021-12-15 22:54:39,890 INFO L226 Difference]: Without dead ends: 2172 [2021-12-15 22:54:39,892 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 22:54:39,894 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:39,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:54:39,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2021-12-15 22:54:39,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 2168. [2021-12-15 22:54:39,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2168 states, 2167 states have (on average 1.2344254730041533) internal successors, (2675), 2167 states have internal predecessors, (2675), 0 states have call successors, (0), 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 22:54:39,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2168 states to 2168 states and 2675 transitions. [2021-12-15 22:54:39,935 INFO L78 Accepts]: Start accepts. Automaton has 2168 states and 2675 transitions. Word has length 175 [2021-12-15 22:54:39,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:39,935 INFO L470 AbstractCegarLoop]: Abstraction has 2168 states and 2675 transitions. [2021-12-15 22:54:39,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 2 states have internal predecessors, (102), 0 states have call successors, (0), 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 22:54:39,936 INFO L276 IsEmpty]: Start isEmpty. Operand 2168 states and 2675 transitions. [2021-12-15 22:54:39,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2021-12-15 22:54:39,941 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:39,941 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:39,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:54:39,941 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:39,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:39,942 INFO L85 PathProgramCache]: Analyzing trace with hash 232934252, now seen corresponding path program 1 times [2021-12-15 22:54:39,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:39,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478227171] [2021-12-15 22:54:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:39,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-15 22:54:40,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:40,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478227171] [2021-12-15 22:54:40,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478227171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:40,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:40,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:54:40,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898780127] [2021-12-15 22:54:40,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:40,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:40,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:40,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:40,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:40,164 INFO L87 Difference]: Start difference. First operand 2168 states and 2675 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 22:54:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:41,595 INFO L93 Difference]: Finished difference Result 4633 states and 5659 transitions. [2021-12-15 22:54:41,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:41,595 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 281 [2021-12-15 22:54:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:41,605 INFO L225 Difference]: With dead ends: 4633 [2021-12-15 22:54:41,605 INFO L226 Difference]: Without dead ends: 2467 [2021-12-15 22:54:41,608 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 22:54:41,610 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:41,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:54:41,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-12-15 22:54:41,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2467. [2021-12-15 22:54:41,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2467 states, 2466 states have (on average 1.208434712084347) internal successors, (2980), 2466 states have internal predecessors, (2980), 0 states have call successors, (0), 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 22:54:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2467 states to 2467 states and 2980 transitions. [2021-12-15 22:54:41,675 INFO L78 Accepts]: Start accepts. Automaton has 2467 states and 2980 transitions. Word has length 281 [2021-12-15 22:54:41,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:41,677 INFO L470 AbstractCegarLoop]: Abstraction has 2467 states and 2980 transitions. [2021-12-15 22:54:41,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 22:54:41,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2467 states and 2980 transitions. [2021-12-15 22:54:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2021-12-15 22:54:41,682 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:41,682 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:41,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:54:41,683 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:41,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1701415331, now seen corresponding path program 1 times [2021-12-15 22:54:41,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442898805] [2021-12-15 22:54:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:41,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 22:54:41,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442898805] [2021-12-15 22:54:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442898805] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:41,845 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:41,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:54:41,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348206068] [2021-12-15 22:54:41,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:41,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:41,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:41,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:41,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:41,849 INFO L87 Difference]: Start difference. First operand 2467 states and 2980 transitions. Second operand has 3 states, 3 states have (on average 69.0) 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 22:54:43,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:43,483 INFO L93 Difference]: Finished difference Result 5232 states and 6542 transitions. [2021-12-15 22:54:43,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:43,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.0) 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 296 [2021-12-15 22:54:43,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:43,495 INFO L225 Difference]: With dead ends: 5232 [2021-12-15 22:54:43,495 INFO L226 Difference]: Without dead ends: 3066 [2021-12-15 22:54:43,499 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 22:54:43,502 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 306 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:43,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 22:54:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3066 states. [2021-12-15 22:54:43,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3066 to 2165. [2021-12-15 22:54:43,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2165 states, 2164 states have (on average 1.2310536044362292) internal successors, (2664), 2164 states have internal predecessors, (2664), 0 states have call successors, (0), 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 22:54:43,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 2664 transitions. [2021-12-15 22:54:43,549 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 2664 transitions. Word has length 296 [2021-12-15 22:54:43,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:43,550 INFO L470 AbstractCegarLoop]: Abstraction has 2165 states and 2664 transitions. [2021-12-15 22:54:43,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.0) 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 22:54:43,553 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 2664 transitions. [2021-12-15 22:54:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-15 22:54:43,557 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:43,558 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:43,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:54:43,560 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash -683064422, now seen corresponding path program 1 times [2021-12-15 22:54:43,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:43,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041309815] [2021-12-15 22:54:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:43,566 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:43,709 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-15 22:54:43,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:43,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041309815] [2021-12-15 22:54:43,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041309815] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:43,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:43,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:54:43,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156320425] [2021-12-15 22:54:43,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:43,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:43,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:43,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:43,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:43,712 INFO L87 Difference]: Start difference. First operand 2165 states and 2664 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 22:54:45,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:45,664 INFO L93 Difference]: Finished difference Result 5235 states and 6625 transitions. [2021-12-15 22:54:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 355 [2021-12-15 22:54:45,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:45,677 INFO L225 Difference]: With dead ends: 5235 [2021-12-15 22:54:45,677 INFO L226 Difference]: Without dead ends: 3371 [2021-12-15 22:54:45,681 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 22:54:45,681 INFO L933 BasicCegarLoop]: 600 mSDtfsCounter, 319 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:45,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [319 Valid, 637 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:54:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-12-15 22:54:45,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 3072. [2021-12-15 22:54:45,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3072 states, 3071 states have (on average 1.1862585477043308) internal successors, (3643), 3071 states have internal predecessors, (3643), 0 states have call successors, (0), 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 22:54:45,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3072 states to 3072 states and 3643 transitions. [2021-12-15 22:54:45,737 INFO L78 Accepts]: Start accepts. Automaton has 3072 states and 3643 transitions. Word has length 355 [2021-12-15 22:54:45,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:45,738 INFO L470 AbstractCegarLoop]: Abstraction has 3072 states and 3643 transitions. [2021-12-15 22:54:45,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 22:54:45,739 INFO L276 IsEmpty]: Start isEmpty. Operand 3072 states and 3643 transitions. [2021-12-15 22:54:45,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-12-15 22:54:45,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:45,743 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:45,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:54:45,744 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:45,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1040181201, now seen corresponding path program 1 times [2021-12-15 22:54:45,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:45,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548875770] [2021-12-15 22:54:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:45,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:45,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:46,054 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 13 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:54:46,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:46,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548875770] [2021-12-15 22:54:46,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548875770] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:54:46,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829196628] [2021-12-15 22:54:46,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:46,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:54:46,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:54:46,059 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 22:54:46,066 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 22:54:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:46,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 22:54:46,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:54:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-15 22:54:46,857 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 22:54:46,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829196628] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:46,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 22:54:46,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-15 22:54:46,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918284823] [2021-12-15 22:54:46,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:46,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:46,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:46,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:46,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:54:46,860 INFO L87 Difference]: Start difference. First operand 3072 states and 3643 transitions. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 22:54:48,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:48,308 INFO L93 Difference]: Finished difference Result 7049 states and 8586 transitions. [2021-12-15 22:54:48,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:48,310 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 360 [2021-12-15 22:54:48,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:48,325 INFO L225 Difference]: With dead ends: 7049 [2021-12-15 22:54:48,326 INFO L226 Difference]: Without dead ends: 4278 [2021-12-15 22:54:48,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 359 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-15 22:54:48,332 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 343 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:48,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 259 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:54:48,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-12-15 22:54:48,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3976. [2021-12-15 22:54:48,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3976 states, 3975 states have (on average 1.1781132075471699) internal successors, (4683), 3975 states have internal predecessors, (4683), 0 states have call successors, (0), 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 22:54:48,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3976 states to 3976 states and 4683 transitions. [2021-12-15 22:54:48,402 INFO L78 Accepts]: Start accepts. Automaton has 3976 states and 4683 transitions. Word has length 360 [2021-12-15 22:54:48,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:48,403 INFO L470 AbstractCegarLoop]: Abstraction has 3976 states and 4683 transitions. [2021-12-15 22:54:48,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 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 22:54:48,403 INFO L276 IsEmpty]: Start isEmpty. Operand 3976 states and 4683 transitions. [2021-12-15 22:54:48,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2021-12-15 22:54:48,408 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:48,409 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:48,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:54:48,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:54:48,630 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:48,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:48,630 INFO L85 PathProgramCache]: Analyzing trace with hash -1310895283, now seen corresponding path program 1 times [2021-12-15 22:54:48,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:48,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003507907] [2021-12-15 22:54:48,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:48,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-15 22:54:48,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:48,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003507907] [2021-12-15 22:54:48,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003507907] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:54:48,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:54:48,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:54:48,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677393707] [2021-12-15 22:54:48,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:54:48,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:54:48,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:54:48,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:54:48,754 INFO L87 Difference]: Start difference. First operand 3976 states and 4683 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 22:54:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:54:50,396 INFO L93 Difference]: Finished difference Result 8848 states and 10657 transitions. [2021-12-15 22:54:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:54:50,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 378 [2021-12-15 22:54:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:54:50,419 INFO L225 Difference]: With dead ends: 8848 [2021-12-15 22:54:50,419 INFO L226 Difference]: Without dead ends: 5173 [2021-12-15 22:54:50,424 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 22:54:50,425 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 248 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-12-15 22:54:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 618 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2021-12-15 22:54:50,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2021-12-15 22:54:50,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 5172. [2021-12-15 22:54:50,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5172 states, 5171 states have (on average 1.157803132856314) internal successors, (5987), 5171 states have internal predecessors, (5987), 0 states have call successors, (0), 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 22:54:50,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5172 states to 5172 states and 5987 transitions. [2021-12-15 22:54:50,510 INFO L78 Accepts]: Start accepts. Automaton has 5172 states and 5987 transitions. Word has length 378 [2021-12-15 22:54:50,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:54:50,511 INFO L470 AbstractCegarLoop]: Abstraction has 5172 states and 5987 transitions. [2021-12-15 22:54:50,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 22:54:50,512 INFO L276 IsEmpty]: Start isEmpty. Operand 5172 states and 5987 transitions. [2021-12-15 22:54:50,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-15 22:54:50,517 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:54:50,518 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:54:50,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:54:50,518 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:54:50,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:54:50,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1780679616, now seen corresponding path program 1 times [2021-12-15 22:54:50,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:54:50,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433921900] [2021-12-15 22:54:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:50,519 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:54:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:50,716 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 7 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:54:50,716 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:54:50,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433921900] [2021-12-15 22:54:50,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433921900] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:54:50,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542702201] [2021-12-15 22:54:50,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:54:50,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:54:50,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:54:50,724 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:54:50,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:54:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:54:50,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-15 22:54:50,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:54:52,050 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 13 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:54:52,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:54:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 13 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:54:55,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542702201] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:54:55,471 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:54:55,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2021-12-15 22:54:55,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767310597] [2021-12-15 22:54:55,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:54:55,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 22:54:55,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:54:55,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 22:54:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:54:55,474 INFO L87 Difference]: Start difference. First operand 5172 states and 5987 transitions. Second operand has 9 states, 9 states have (on average 127.66666666666667) internal successors, (1149), 8 states have internal predecessors, (1149), 0 states have call successors, (0), 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 22:55:08,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:08,061 INFO L93 Difference]: Finished difference Result 33523 states and 39150 transitions. [2021-12-15 22:55:08,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-15 22:55:08,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 127.66666666666667) internal successors, (1149), 8 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 386 [2021-12-15 22:55:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:08,130 INFO L225 Difference]: With dead ends: 33523 [2021-12-15 22:55:08,130 INFO L226 Difference]: Without dead ends: 28652 [2021-12-15 22:55:08,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 767 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-12-15 22:55:08,143 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 4156 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 10103 mSolverCounterSat, 3370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4156 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 13473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3370 IncrementalHoareTripleChecker+Valid, 10103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:08,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4156 Valid, 400 Invalid, 13473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3370 Valid, 10103 Invalid, 0 Unknown, 0 Unchecked, 12.1s Time] [2021-12-15 22:55:08,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28652 states. [2021-12-15 22:55:08,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28652 to 23780. [2021-12-15 22:55:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23780 states, 23779 states have (on average 1.1374321880650995) internal successors, (27047), 23779 states have internal predecessors, (27047), 0 states have call successors, (0), 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 22:55:08,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23780 states to 23780 states and 27047 transitions. [2021-12-15 22:55:08,602 INFO L78 Accepts]: Start accepts. Automaton has 23780 states and 27047 transitions. Word has length 386 [2021-12-15 22:55:08,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:08,602 INFO L470 AbstractCegarLoop]: Abstraction has 23780 states and 27047 transitions. [2021-12-15 22:55:08,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 127.66666666666667) internal successors, (1149), 8 states have internal predecessors, (1149), 0 states have call successors, (0), 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 22:55:08,604 INFO L276 IsEmpty]: Start isEmpty. Operand 23780 states and 27047 transitions. [2021-12-15 22:55:08,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-12-15 22:55:08,611 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:08,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:08,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-15 22:55:08,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-15 22:55:08,833 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:08,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:08,834 INFO L85 PathProgramCache]: Analyzing trace with hash -635459871, now seen corresponding path program 1 times [2021-12-15 22:55:08,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:08,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007167657] [2021-12-15 22:55:08,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:08,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:08,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:09,015 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-12-15 22:55:09,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:09,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007167657] [2021-12-15 22:55:09,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007167657] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:09,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:09,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:55:09,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956129077] [2021-12-15 22:55:09,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:09,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:55:09,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:09,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:55:09,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:55:09,020 INFO L87 Difference]: Start difference. First operand 23780 states and 27047 transitions. Second operand has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:55:10,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:10,571 INFO L93 Difference]: Finished difference Result 57714 states and 65715 transitions. [2021-12-15 22:55:10,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:55:10,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 482 [2021-12-15 22:55:10,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:10,630 INFO L225 Difference]: With dead ends: 57714 [2021-12-15 22:55:10,630 INFO L226 Difference]: Without dead ends: 27358 [2021-12-15 22:55:10,656 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 22:55:10,656 INFO L933 BasicCegarLoop]: 613 mSDtfsCounter, 308 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 1131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:10,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 652 Invalid, 1131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:55:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27358 states. [2021-12-15 22:55:10,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27358 to 26162. [2021-12-15 22:55:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26162 states, 26161 states have (on average 1.0827185505141241) internal successors, (28325), 26161 states have internal predecessors, (28325), 0 states have call successors, (0), 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 22:55:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26162 states to 26162 states and 28325 transitions. [2021-12-15 22:55:10,978 INFO L78 Accepts]: Start accepts. Automaton has 26162 states and 28325 transitions. Word has length 482 [2021-12-15 22:55:10,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:10,979 INFO L470 AbstractCegarLoop]: Abstraction has 26162 states and 28325 transitions. [2021-12-15 22:55:10,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.0) internal successors, (294), 3 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:55:10,979 INFO L276 IsEmpty]: Start isEmpty. Operand 26162 states and 28325 transitions. [2021-12-15 22:55:10,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 551 [2021-12-15 22:55:10,984 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:10,985 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:10,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:55:10,985 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:10,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:10,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1816689579, now seen corresponding path program 1 times [2021-12-15 22:55:10,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:10,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951630478] [2021-12-15 22:55:10,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:10,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 384 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 22:55:11,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:11,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951630478] [2021-12-15 22:55:11,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951630478] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:11,208 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:11,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:55:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400491117] [2021-12-15 22:55:11,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:11,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:55:11,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:11,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:55:11,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:55:11,211 INFO L87 Difference]: Start difference. First operand 26162 states and 28325 transitions. Second operand has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 22:55:12,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:12,705 INFO L93 Difference]: Finished difference Result 61290 states and 66760 transitions. [2021-12-15 22:55:12,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:55:12,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 550 [2021-12-15 22:55:12,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:12,758 INFO L225 Difference]: With dead ends: 61290 [2021-12-15 22:55:12,759 INFO L226 Difference]: Without dead ends: 35728 [2021-12-15 22:55:12,785 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 22:55:12,787 INFO L933 BasicCegarLoop]: 204 mSDtfsCounter, 194 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:12,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 233 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:55:12,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35728 states. [2021-12-15 22:55:13,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35728 to 32738. [2021-12-15 22:55:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32738 states, 32737 states have (on average 1.0891651647982405) internal successors, (35656), 32737 states have internal predecessors, (35656), 0 states have call successors, (0), 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 22:55:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32738 states to 32738 states and 35656 transitions. [2021-12-15 22:55:13,298 INFO L78 Accepts]: Start accepts. Automaton has 32738 states and 35656 transitions. Word has length 550 [2021-12-15 22:55:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:13,299 INFO L470 AbstractCegarLoop]: Abstraction has 32738 states and 35656 transitions. [2021-12-15 22:55:13,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 148.33333333333334) internal successors, (445), 3 states have internal predecessors, (445), 0 states have call successors, (0), 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 22:55:13,300 INFO L276 IsEmpty]: Start isEmpty. Operand 32738 states and 35656 transitions. [2021-12-15 22:55:13,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 625 [2021-12-15 22:55:13,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:13,317 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:13,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:55:13,318 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -469191099, now seen corresponding path program 1 times [2021-12-15 22:55:13,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:13,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577333457] [2021-12-15 22:55:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:13,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2021-12-15 22:55:13,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577333457] [2021-12-15 22:55:13,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577333457] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:13,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:13,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:55:13,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397123022] [2021-12-15 22:55:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:13,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:55:13,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:13,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:55:13,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:55:13,515 INFO L87 Difference]: Start difference. First operand 32738 states and 35656 transitions. Second operand has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 22:55:14,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:14,849 INFO L93 Difference]: Finished difference Result 64873 states and 70610 transitions. [2021-12-15 22:55:14,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:55:14,849 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 624 [2021-12-15 22:55:14,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:14,884 INFO L225 Difference]: With dead ends: 64873 [2021-12-15 22:55:14,884 INFO L226 Difference]: Without dead ends: 32735 [2021-12-15 22:55:14,901 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 22:55:14,902 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 464 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 464 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:14,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [464 Valid, 70 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 22:55:14,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32735 states. [2021-12-15 22:55:15,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32735 to 32435. [2021-12-15 22:55:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32435 states, 32434 states have (on average 1.0849108959733613) internal successors, (35188), 32434 states have internal predecessors, (35188), 0 states have call successors, (0), 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 22:55:15,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32435 states to 32435 states and 35188 transitions. [2021-12-15 22:55:15,393 INFO L78 Accepts]: Start accepts. Automaton has 32435 states and 35188 transitions. Word has length 624 [2021-12-15 22:55:15,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:15,394 INFO L470 AbstractCegarLoop]: Abstraction has 32435 states and 35188 transitions. [2021-12-15 22:55:15,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.66666666666666) internal successors, (392), 3 states have internal predecessors, (392), 0 states have call successors, (0), 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 22:55:15,394 INFO L276 IsEmpty]: Start isEmpty. Operand 32435 states and 35188 transitions. [2021-12-15 22:55:15,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2021-12-15 22:55:15,405 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:15,405 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:55:15,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:55:15,405 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:15,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:15,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1057692341, now seen corresponding path program 1 times [2021-12-15 22:55:15,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:15,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596181103] [2021-12-15 22:55:15,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:15,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:15,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:15,601 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 599 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-15 22:55:15,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596181103] [2021-12-15 22:55:15,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596181103] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:15,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:15,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:55:15,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021181761] [2021-12-15 22:55:15,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:15,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:55:15,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:15,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:55:15,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:55:15,604 INFO L87 Difference]: Start difference. First operand 32435 states and 35188 transitions. Second operand has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 22:55:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:16,959 INFO L93 Difference]: Finished difference Result 71147 states and 77543 transitions. [2021-12-15 22:55:16,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:55:16,959 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 645 [2021-12-15 22:55:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:16,992 INFO L225 Difference]: With dead ends: 71147 [2021-12-15 22:55:16,992 INFO L226 Difference]: Without dead ends: 36322 [2021-12-15 22:55:17,012 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 22:55:17,013 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 220 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:17,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 518 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:55:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36322 states. [2021-12-15 22:55:17,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36322 to 35423. [2021-12-15 22:55:17,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35423 states, 35422 states have (on average 1.0722997007509458) internal successors, (37983), 35422 states have internal predecessors, (37983), 0 states have call successors, (0), 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 22:55:17,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35423 states to 35423 states and 37983 transitions. [2021-12-15 22:55:17,454 INFO L78 Accepts]: Start accepts. Automaton has 35423 states and 37983 transitions. Word has length 645 [2021-12-15 22:55:17,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:17,454 INFO L470 AbstractCegarLoop]: Abstraction has 35423 states and 37983 transitions. [2021-12-15 22:55:17,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.0) internal successors, (534), 3 states have internal predecessors, (534), 0 states have call successors, (0), 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 22:55:17,454 INFO L276 IsEmpty]: Start isEmpty. Operand 35423 states and 37983 transitions. [2021-12-15 22:55:17,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-12-15 22:55:17,464 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:17,465 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:55:17,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 22:55:17,465 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:17,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:17,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1758629167, now seen corresponding path program 1 times [2021-12-15 22:55:17,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:17,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901508858] [2021-12-15 22:55:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:17,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:17,685 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 345 proven. 0 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2021-12-15 22:55:17,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:17,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901508858] [2021-12-15 22:55:17,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901508858] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:17,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:17,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:55:17,688 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277734016] [2021-12-15 22:55:17,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:17,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:55:17,689 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:55:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:55:17,690 INFO L87 Difference]: Start difference. First operand 35423 states and 37983 transitions. Second operand has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 22:55:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:19,131 INFO L93 Difference]: Finished difference Result 76840 states and 82493 transitions. [2021-12-15 22:55:19,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:55:19,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 685 [2021-12-15 22:55:19,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:19,177 INFO L225 Difference]: With dead ends: 76840 [2021-12-15 22:55:19,178 INFO L226 Difference]: Without dead ends: 42017 [2021-12-15 22:55:19,201 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 22:55:19,201 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 353 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:19,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 138 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 854 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-15 22:55:19,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42017 states. [2021-12-15 22:55:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42017 to 39009. [2021-12-15 22:55:19,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39009 states, 39008 states have (on average 1.0726773995077932) internal successors, (41843), 39008 states have internal predecessors, (41843), 0 states have call successors, (0), 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 22:55:19,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39009 states to 39009 states and 41843 transitions. [2021-12-15 22:55:19,733 INFO L78 Accepts]: Start accepts. Automaton has 39009 states and 41843 transitions. Word has length 685 [2021-12-15 22:55:19,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:19,733 INFO L470 AbstractCegarLoop]: Abstraction has 39009 states and 41843 transitions. [2021-12-15 22:55:19,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 137.66666666666666) internal successors, (413), 3 states have internal predecessors, (413), 0 states have call successors, (0), 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 22:55:19,734 INFO L276 IsEmpty]: Start isEmpty. Operand 39009 states and 41843 transitions. [2021-12-15 22:55:19,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 707 [2021-12-15 22:55:19,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:19,742 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:55:19,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:55:19,742 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:19,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1633261171, now seen corresponding path program 1 times [2021-12-15 22:55:19,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:19,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981472842] [2021-12-15 22:55:19,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:19,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:19,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:19,989 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 642 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-15 22:55:19,989 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:19,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981472842] [2021-12-15 22:55:19,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981472842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:19,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:19,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:55:19,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345001148] [2021-12-15 22:55:19,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:19,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:55:19,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:19,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:55:19,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:55:19,992 INFO L87 Difference]: Start difference. First operand 39009 states and 41843 transitions. Second operand has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 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 22:55:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:55:22,143 INFO L93 Difference]: Finished difference Result 85221 states and 91383 transitions. [2021-12-15 22:55:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:55:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 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 706 [2021-12-15 22:55:22,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:55:22,185 INFO L225 Difference]: With dead ends: 85221 [2021-12-15 22:55:22,185 INFO L226 Difference]: Without dead ends: 46513 [2021-12-15 22:55:22,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 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 22:55:22,209 INFO L933 BasicCegarLoop]: 513 mSDtfsCounter, 356 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1965 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 1965 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:55:22,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 594 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 1965 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:55:22,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46513 states. [2021-12-15 22:55:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46513 to 43511. [2021-12-15 22:55:22,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43511 states, 43510 states have (on average 1.0678005056308895) internal successors, (46460), 43510 states have internal predecessors, (46460), 0 states have call successors, (0), 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 22:55:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43511 states to 43511 states and 46460 transitions. [2021-12-15 22:55:22,697 INFO L78 Accepts]: Start accepts. Automaton has 43511 states and 46460 transitions. Word has length 706 [2021-12-15 22:55:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:55:22,698 INFO L470 AbstractCegarLoop]: Abstraction has 43511 states and 46460 transitions. [2021-12-15 22:55:22,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 150.25) internal successors, (601), 4 states have internal predecessors, (601), 0 states have call successors, (0), 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 22:55:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 43511 states and 46460 transitions. [2021-12-15 22:55:22,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-12-15 22:55:22,704 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:55:22,705 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:55:22,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 22:55:22,705 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:55:22,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:55:22,706 INFO L85 PathProgramCache]: Analyzing trace with hash 744274850, now seen corresponding path program 1 times [2021-12-15 22:55:22,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:55:22,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377172330] [2021-12-15 22:55:22,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:55:22,707 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:55:22,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:55:23,125 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 406 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-15 22:55:23,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:55:23,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377172330] [2021-12-15 22:55:23,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377172330] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:55:23,126 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:55:23,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:55:23,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918144284] [2021-12-15 22:55:23,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:55:23,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:55:23,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:55:23,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:55:23,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:55:23,128 INFO L87 Difference]: Start difference. First operand 43511 states and 46460 transitions. Second operand has 4 states, 4 states have (on average 111.5) internal successors, (446), 4 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)