./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label51.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3a877d22 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem03_label51.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 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 --- Real Ultimate output --- This is Ultimate 0.2.2-3a877d227dc491413fd706022d0c47cd97beb353-3a877d2 [2021-12-15 09:06:07,190 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 09:06:07,192 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 09:06:07,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 09:06:07,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 09:06:07,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 09:06:07,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 09:06:07,256 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 09:06:07,257 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 09:06:07,257 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 09:06:07,258 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 09:06:07,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 09:06:07,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 09:06:07,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 09:06:07,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 09:06:07,261 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 09:06:07,261 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 09:06:07,262 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 09:06:07,263 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 09:06:07,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 09:06:07,265 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 09:06:07,276 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 09:06:07,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 09:06:07,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 09:06:07,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 09:06:07,279 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 09:06:07,279 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 09:06:07,280 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 09:06:07,280 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 09:06:07,281 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 09:06:07,281 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 09:06:07,281 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 09:06:07,282 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 09:06:07,282 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 09:06:07,283 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 09:06:07,283 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 09:06:07,284 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 09:06:07,284 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 09:06:07,284 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 09:06:07,285 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 09:06:07,285 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 09:06:07,286 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 09:06:07,302 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 09:06:07,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 09:06:07,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 09:06:07,303 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 09:06:07,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 09:06:07,304 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 09:06:07,304 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 09:06:07,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 09:06:07,307 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 09:06:07,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 09:06:07,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 09:06:07,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 09:06:07,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 09:06:07,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 09:06:07,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 09:06:07,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 09:06:07,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 09:06:07,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 09:06:07,311 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 09:06:07,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:06:07,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 09:06:07,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 09:06:07,312 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 09:06:07,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 09:06:07,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 09:06:07,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 09:06:07,313 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 09:06:07,313 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 09:06:07,313 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 09:06:07,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74edf29578da59b17de672f50e10ed8f88a3850b8ffae9884ae020db50745360 [2021-12-15 09:06:07,473 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 09:06:07,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 09:06:07,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 09:06:07,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 09:06:07,488 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 09:06:07,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2021-12-15 09:06:07,547 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ecd00c8/ab159dfc8f5c456e9b2143d4b277fdf6/FLAG0f94b480f [2021-12-15 09:06:07,975 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 09:06:07,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label51.c [2021-12-15 09:06:07,994 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ecd00c8/ab159dfc8f5c456e9b2143d4b277fdf6/FLAG0f94b480f [2021-12-15 09:06:08,009 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62ecd00c8/ab159dfc8f5c456e9b2143d4b277fdf6 [2021-12-15 09:06:08,012 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 09:06:08,014 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 09:06:08,016 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 09:06:08,016 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 09:06:08,018 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 09:06:08,019 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,019 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@101e5e0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08, skipping insertion in model container [2021-12-15 09:06:08,020 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,024 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 09:06:08,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 09:06:08,455 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2021-12-15 09:06:08,483 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:06:08,491 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 09:06:08,668 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label51.c[59610,59623] [2021-12-15 09:06:08,675 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 09:06:08,688 INFO L208 MainTranslator]: Completed translation [2021-12-15 09:06:08,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08 WrapperNode [2021-12-15 09:06:08,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 09:06:08,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 09:06:08,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 09:06:08,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 09:06:08,695 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,722 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,787 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-12-15 09:06:08,788 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 09:06:08,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 09:06:08,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 09:06:08,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 09:06:08,795 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,795 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,802 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,836 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,848 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 09:06:08,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 09:06:08,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 09:06:08,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 09:06:08,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (1/1) ... [2021-12-15 09:06:08,877 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 09:06:08,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:08,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-15 09:06:08,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-15 09:06:08,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 09:06:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 09:06:08,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 09:06:08,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 09:06:09,015 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 09:06:09,017 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 09:06:10,049 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 09:06:10,059 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 09:06:10,060 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 09:06:10,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:06:10 BoogieIcfgContainer [2021-12-15 09:06:10,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 09:06:10,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 09:06:10,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 09:06:10,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 09:06:10,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 09:06:08" (1/3) ... [2021-12-15 09:06:10,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a980175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:06:10, skipping insertion in model container [2021-12-15 09:06:10,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 09:06:08" (2/3) ... [2021-12-15 09:06:10,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a980175 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 09:06:10, skipping insertion in model container [2021-12-15 09:06:10,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 09:06:10" (3/3) ... [2021-12-15 09:06:10,080 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label51.c [2021-12-15 09:06:10,091 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 09:06:10,091 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 09:06:10,127 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 09:06:10,131 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-15 09:06:10,131 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 09:06:10,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:10,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-12-15 09:06:10,164 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:10,165 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:10,165 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:10,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:10,169 INFO L85 PathProgramCache]: Analyzing trace with hash 951431538, now seen corresponding path program 1 times [2021-12-15 09:06:10,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:10,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532599698] [2021-12-15 09:06:10,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:10,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:10,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:10,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:10,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:10,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532599698] [2021-12-15 09:06:10,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532599698] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:10,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:10,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:10,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181311837] [2021-12-15 09:06:10,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:10,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:10,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:10,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:10,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:10,553 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:11,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:11,387 INFO L93 Difference]: Finished difference Result 836 states and 1480 transitions. [2021-12-15 09:06:11,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:11,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 188 [2021-12-15 09:06:11,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:11,398 INFO L225 Difference]: With dead ends: 836 [2021-12-15 09:06:11,398 INFO L226 Difference]: Without dead ends: 457 [2021-12-15 09:06:11,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:11,403 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 95 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:11,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 150 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-15 09:06:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2021-12-15 09:06:11,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 451. [2021-12-15 09:06:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 450 states have (on average 1.5977777777777777) internal successors, (719), 450 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:11,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 719 transitions. [2021-12-15 09:06:11,448 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 719 transitions. Word has length 188 [2021-12-15 09:06:11,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:11,449 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 719 transitions. [2021-12-15 09:06:11,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 719 transitions. [2021-12-15 09:06:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-12-15 09:06:11,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:11,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:11,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 09:06:11,456 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:11,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1008865534, now seen corresponding path program 1 times [2021-12-15 09:06:11,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:11,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351650669] [2021-12-15 09:06:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:11,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:11,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:11,562 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:11,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:11,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351650669] [2021-12-15 09:06:11,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351650669] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:11,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:11,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:11,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614868998] [2021-12-15 09:06:11,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:11,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:11,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:11,569 INFO L87 Difference]: Start difference. First operand 451 states and 719 transitions. Second operand has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:12,162 INFO L93 Difference]: Finished difference Result 1337 states and 2139 transitions. [2021-12-15 09:06:12,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:12,163 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 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 194 [2021-12-15 09:06:12,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:12,166 INFO L225 Difference]: With dead ends: 1337 [2021-12-15 09:06:12,167 INFO L226 Difference]: Without dead ends: 888 [2021-12-15 09:06:12,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:12,174 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 283 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:12,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 135 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:12,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2021-12-15 09:06:12,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 880. [2021-12-15 09:06:12,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.57679180887372) internal successors, (1386), 879 states have internal predecessors, (1386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1386 transitions. [2021-12-15 09:06:12,202 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1386 transitions. Word has length 194 [2021-12-15 09:06:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1386 transitions. [2021-12-15 09:06:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.66666666666667) internal successors, (194), 2 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1386 transitions. [2021-12-15 09:06:12,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-12-15 09:06:12,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:12,205 INFO L514 BasicCegarLoop]: trace histogram [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 09:06:12,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 09:06:12,205 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:12,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:12,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1711158196, now seen corresponding path program 1 times [2021-12-15 09:06:12,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:12,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931229755] [2021-12-15 09:06:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:12,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:12,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:12,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:12,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931229755] [2021-12-15 09:06:12,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1931229755] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:12,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:12,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:12,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237512359] [2021-12-15 09:06:12,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:12,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:12,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:12,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:12,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:12,290 INFO L87 Difference]: Start difference. First operand 880 states and 1386 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:12,831 INFO L93 Difference]: Finished difference Result 2604 states and 4113 transitions. [2021-12-15 09:06:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:12,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 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 198 [2021-12-15 09:06:12,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:12,837 INFO L225 Difference]: With dead ends: 2604 [2021-12-15 09:06:12,837 INFO L226 Difference]: Without dead ends: 1726 [2021-12-15 09:06:12,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:12,844 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 219 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:12,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 144 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:12,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-12-15 09:06:12,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1714. [2021-12-15 09:06:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.521891418563923) internal successors, (2607), 1713 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 2607 transitions. [2021-12-15 09:06:12,880 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 2607 transitions. Word has length 198 [2021-12-15 09:06:12,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:12,881 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 2607 transitions. [2021-12-15 09:06:12,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 2 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:12,881 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 2607 transitions. [2021-12-15 09:06:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-12-15 09:06:12,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:12,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-12-15 09:06:12,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 09:06:12,885 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:12,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1562106418, now seen corresponding path program 1 times [2021-12-15 09:06:12,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:12,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815964130] [2021-12-15 09:06:12,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:12,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:06:12,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:12,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815964130] [2021-12-15 09:06:12,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815964130] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:12,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:12,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:12,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401701794] [2021-12-15 09:06:12,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:12,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:12,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:12,926 INFO L87 Difference]: Start difference. First operand 1714 states and 2607 transitions. Second operand has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:13,495 INFO L93 Difference]: Finished difference Result 5111 states and 7782 transitions. [2021-12-15 09:06:13,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:13,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 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 199 [2021-12-15 09:06:13,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:13,505 INFO L225 Difference]: With dead ends: 5111 [2021-12-15 09:06:13,506 INFO L226 Difference]: Without dead ends: 3399 [2021-12-15 09:06:13,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:13,523 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 267 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:13,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 170 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:13,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3399 states. [2021-12-15 09:06:13,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3399 to 3387. [2021-12-15 09:06:13,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3387 states, 3386 states have (on average 1.4465445953927938) internal successors, (4898), 3386 states have internal predecessors, (4898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3387 states to 3387 states and 4898 transitions. [2021-12-15 09:06:13,576 INFO L78 Accepts]: Start accepts. Automaton has 3387 states and 4898 transitions. Word has length 199 [2021-12-15 09:06:13,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:13,576 INFO L470 AbstractCegarLoop]: Abstraction has 3387 states and 4898 transitions. [2021-12-15 09:06:13,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.33333333333333) internal successors, (196), 2 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,576 INFO L276 IsEmpty]: Start isEmpty. Operand 3387 states and 4898 transitions. [2021-12-15 09:06:13,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-12-15 09:06:13,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:13,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:13,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 09:06:13,582 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash -647571538, now seen corresponding path program 1 times [2021-12-15 09:06:13,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:13,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502868150] [2021-12-15 09:06:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:13,583 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:13,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:13,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:13,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502868150] [2021-12-15 09:06:13,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502868150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:13,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:13,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:13,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796851681] [2021-12-15 09:06:13,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:13,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:13,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:13,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:13,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:13,663 INFO L87 Difference]: Start difference. First operand 3387 states and 4898 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:13,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:13,962 INFO L93 Difference]: Finished difference Result 6522 states and 9465 transitions. [2021-12-15 09:06:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:13,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 201 [2021-12-15 09:06:13,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:13,972 INFO L225 Difference]: With dead ends: 6522 [2021-12-15 09:06:13,972 INFO L226 Difference]: Without dead ends: 3344 [2021-12-15 09:06:13,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:13,976 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 329 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:13,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 31 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-15 09:06:13,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3344 states. [2021-12-15 09:06:14,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3344 to 3344. [2021-12-15 09:06:14,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 1.4020341011067903) internal successors, (4687), 3343 states have internal predecessors, (4687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:14,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 4687 transitions. [2021-12-15 09:06:14,021 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 4687 transitions. Word has length 201 [2021-12-15 09:06:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:14,021 INFO L470 AbstractCegarLoop]: Abstraction has 3344 states and 4687 transitions. [2021-12-15 09:06:14,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 2 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:14,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 4687 transitions. [2021-12-15 09:06:14,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-12-15 09:06:14,026 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:14,026 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:14,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 09:06:14,027 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:14,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:14,027 INFO L85 PathProgramCache]: Analyzing trace with hash -799842633, now seen corresponding path program 1 times [2021-12-15 09:06:14,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:14,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961786134] [2021-12-15 09:06:14,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:14,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:14,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:14,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:14,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961786134] [2021-12-15 09:06:14,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961786134] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:14,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277588116] [2021-12-15 09:06:14,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:14,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:14,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:14,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:14,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 09:06:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:14,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:14,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:14,632 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:06:14,632 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:14,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277588116] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:14,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:14,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:14,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665050074] [2021-12-15 09:06:14,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:14,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:14,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:14,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:14,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:14,634 INFO L87 Difference]: Start difference. First operand 3344 states and 4687 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:15,141 INFO L93 Difference]: Finished difference Result 8125 states and 11479 transitions. [2021-12-15 09:06:15,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:15,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-12-15 09:06:15,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:15,155 INFO L225 Difference]: With dead ends: 8125 [2021-12-15 09:06:15,155 INFO L226 Difference]: Without dead ends: 4783 [2021-12-15 09:06:15,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:15,161 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 55 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:15,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 107 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:15,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-12-15 09:06:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4780. [2021-12-15 09:06:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4780 states, 4779 states have (on average 1.3812513078049802) internal successors, (6601), 4779 states have internal predecessors, (6601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4780 states to 4780 states and 6601 transitions. [2021-12-15 09:06:15,236 INFO L78 Accepts]: Start accepts. Automaton has 4780 states and 6601 transitions. Word has length 205 [2021-12-15 09:06:15,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:15,237 INFO L470 AbstractCegarLoop]: Abstraction has 4780 states and 6601 transitions. [2021-12-15 09:06:15,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4780 states and 6601 transitions. [2021-12-15 09:06:15,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-12-15 09:06:15,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:15,244 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:15,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:15,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-15 09:06:15,460 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:15,460 INFO L85 PathProgramCache]: Analyzing trace with hash -2010388536, now seen corresponding path program 1 times [2021-12-15 09:06:15,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:15,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949320798] [2021-12-15 09:06:15,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:15,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:15,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:06:15,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:15,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949320798] [2021-12-15 09:06:15,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949320798] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:15,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:15,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:15,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589213161] [2021-12-15 09:06:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:15,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:15,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:15,507 INFO L87 Difference]: Start difference. First operand 4780 states and 6601 transitions. Second operand has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:16,094 INFO L93 Difference]: Finished difference Result 10985 states and 15346 transitions. [2021-12-15 09:06:16,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:16,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-12-15 09:06:16,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:16,111 INFO L225 Difference]: With dead ends: 10985 [2021-12-15 09:06:16,112 INFO L226 Difference]: Without dead ends: 6412 [2021-12-15 09:06:16,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:16,118 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 215 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:16,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 341 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:16,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6412 states. [2021-12-15 09:06:16,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6412 to 6408. [2021-12-15 09:06:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6408 states, 6407 states have (on average 1.323084126736382) internal successors, (8477), 6407 states have internal predecessors, (8477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6408 states to 6408 states and 8477 transitions. [2021-12-15 09:06:16,205 INFO L78 Accepts]: Start accepts. Automaton has 6408 states and 8477 transitions. Word has length 209 [2021-12-15 09:06:16,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:16,205 INFO L470 AbstractCegarLoop]: Abstraction has 6408 states and 8477 transitions. [2021-12-15 09:06:16,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.0) internal successors, (204), 3 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,205 INFO L276 IsEmpty]: Start isEmpty. Operand 6408 states and 8477 transitions. [2021-12-15 09:06:16,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-12-15 09:06:16,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:16,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:16,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 09:06:16,213 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 230869461, now seen corresponding path program 1 times [2021-12-15 09:06:16,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:16,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465347293] [2021-12-15 09:06:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:16,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:16,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:16,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465347293] [2021-12-15 09:06:16,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465347293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:16,257 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:16,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:16,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313613968] [2021-12-15 09:06:16,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:16,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:16,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:16,258 INFO L87 Difference]: Start difference. First operand 6408 states and 8477 transitions. Second operand has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:16,821 INFO L93 Difference]: Finished difference Result 18148 states and 24110 transitions. [2021-12-15 09:06:16,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:16,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 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 211 [2021-12-15 09:06:16,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:16,846 INFO L225 Difference]: With dead ends: 18148 [2021-12-15 09:06:16,846 INFO L226 Difference]: Without dead ends: 12150 [2021-12-15 09:06:16,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:16,855 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 241 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:16,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 103 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12150 states. [2021-12-15 09:06:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12150 to 12111. [2021-12-15 09:06:16,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12111 states, 12110 states have (on average 1.3194054500412882) internal successors, (15978), 12110 states have internal predecessors, (15978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12111 states to 12111 states and 15978 transitions. [2021-12-15 09:06:16,999 INFO L78 Accepts]: Start accepts. Automaton has 12111 states and 15978 transitions. Word has length 211 [2021-12-15 09:06:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 12111 states and 15978 transitions. [2021-12-15 09:06:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.33333333333333) internal successors, (211), 2 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 12111 states and 15978 transitions. [2021-12-15 09:06:17,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-15 09:06:17,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:17,014 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:17,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 09:06:17,015 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash -96273084, now seen corresponding path program 1 times [2021-12-15 09:06:17,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:17,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145159439] [2021-12-15 09:06:17,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:17,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:17,087 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-15 09:06:17,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:17,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145159439] [2021-12-15 09:06:17,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145159439] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:17,090 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:17,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:17,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012240895] [2021-12-15 09:06:17,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:17,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:17,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:17,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:17,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:17,092 INFO L87 Difference]: Start difference. First operand 12111 states and 15978 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 09:06:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:17,331 INFO L93 Difference]: Finished difference Result 33224 states and 44035 transitions. [2021-12-15 09:06:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:17,331 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 214 [2021-12-15 09:06:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:17,365 INFO L225 Difference]: With dead ends: 33224 [2021-12-15 09:06:17,365 INFO L226 Difference]: Without dead ends: 22132 [2021-12-15 09:06:17,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:17,380 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 322 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:17,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 528 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-15 09:06:17,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22132 states. [2021-12-15 09:06:17,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22132 to 22113. [2021-12-15 09:06:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22113 states, 22112 states have (on average 1.3226302460202606) internal successors, (29246), 22112 states have internal predecessors, (29246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:17,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22113 states to 22113 states and 29246 transitions. [2021-12-15 09:06:17,697 INFO L78 Accepts]: Start accepts. Automaton has 22113 states and 29246 transitions. Word has length 214 [2021-12-15 09:06:17,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:17,697 INFO L470 AbstractCegarLoop]: Abstraction has 22113 states and 29246 transitions. [2021-12-15 09:06:17,698 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 09:06:17,698 INFO L276 IsEmpty]: Start isEmpty. Operand 22113 states and 29246 transitions. [2021-12-15 09:06:17,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-12-15 09:06:17,720 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:17,721 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:17,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 09:06:17,721 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:17,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:17,721 INFO L85 PathProgramCache]: Analyzing trace with hash -282510019, now seen corresponding path program 1 times [2021-12-15 09:06:17,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:17,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560409711] [2021-12-15 09:06:17,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:17,722 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:17,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560409711] [2021-12-15 09:06:17,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560409711] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:17,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:17,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:17,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967219150] [2021-12-15 09:06:17,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:17,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:17,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:17,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:17,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:17,771 INFO L87 Difference]: Start difference. First operand 22113 states and 29246 transitions. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:18,496 INFO L93 Difference]: Finished difference Result 51615 states and 68625 transitions. [2021-12-15 09:06:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 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 214 [2021-12-15 09:06:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:18,549 INFO L225 Difference]: With dead ends: 51615 [2021-12-15 09:06:18,549 INFO L226 Difference]: Without dead ends: 30521 [2021-12-15 09:06:18,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:18,569 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 208 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:18,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 149 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 689 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30521 states. [2021-12-15 09:06:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30521 to 30462. [2021-12-15 09:06:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30462 states, 30461 states have (on average 1.3286169199960605) internal successors, (40471), 30461 states have internal predecessors, (40471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:19,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30462 states to 30462 states and 40471 transitions. [2021-12-15 09:06:19,010 INFO L78 Accepts]: Start accepts. Automaton has 30462 states and 40471 transitions. Word has length 214 [2021-12-15 09:06:19,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:19,010 INFO L470 AbstractCegarLoop]: Abstraction has 30462 states and 40471 transitions. [2021-12-15 09:06:19,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 2 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:19,010 INFO L276 IsEmpty]: Start isEmpty. Operand 30462 states and 40471 transitions. [2021-12-15 09:06:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-12-15 09:06:19,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:19,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2021-12-15 09:06:19,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 09:06:19,041 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:19,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:19,041 INFO L85 PathProgramCache]: Analyzing trace with hash 660759263, now seen corresponding path program 2 times [2021-12-15 09:06:19,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:19,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319945116] [2021-12-15 09:06:19,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:19,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:19,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 39 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:06:19,109 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:19,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319945116] [2021-12-15 09:06:19,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319945116] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:19,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729186637] [2021-12-15 09:06:19,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 09:06:19,110 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:19,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:19,111 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:19,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 09:06:19,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 09:06:19,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 09:06:19,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:19,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-12-15 09:06:19,552 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:19,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729186637] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:19,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:19,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-15 09:06:19,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755523729] [2021-12-15 09:06:19,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:19,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:19,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:19,554 INFO L87 Difference]: Start difference. First operand 30462 states and 40471 transitions. Second operand has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:20,272 INFO L93 Difference]: Finished difference Result 67388 states and 90092 transitions. [2021-12-15 09:06:20,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:20,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 216 [2021-12-15 09:06:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:20,321 INFO L225 Difference]: With dead ends: 67388 [2021-12-15 09:06:20,321 INFO L226 Difference]: Without dead ends: 38355 [2021-12-15 09:06:20,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:20,345 INFO L933 BasicCegarLoop]: 354 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:20,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 376 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:20,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38355 states. [2021-12-15 09:06:20,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38355 to 35306. [2021-12-15 09:06:20,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35306 states, 35305 states have (on average 1.2336779492989662) internal successors, (43555), 35305 states have internal predecessors, (43555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:20,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35306 states to 35306 states and 43555 transitions. [2021-12-15 09:06:20,909 INFO L78 Accepts]: Start accepts. Automaton has 35306 states and 43555 transitions. Word has length 216 [2021-12-15 09:06:20,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:20,909 INFO L470 AbstractCegarLoop]: Abstraction has 35306 states and 43555 transitions. [2021-12-15 09:06:20,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.33333333333333) internal successors, (202), 3 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:20,910 INFO L276 IsEmpty]: Start isEmpty. Operand 35306 states and 43555 transitions. [2021-12-15 09:06:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-15 09:06:20,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:20,937 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:20,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 09:06:21,153 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,SelfDestructingSolverStorable10 [2021-12-15 09:06:21,154 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:21,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:21,155 INFO L85 PathProgramCache]: Analyzing trace with hash 502345331, now seen corresponding path program 1 times [2021-12-15 09:06:21,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:21,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307614282] [2021-12-15 09:06:21,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:21,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:21,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:21,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307614282] [2021-12-15 09:06:21,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307614282] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:21,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:21,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:21,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556684807] [2021-12-15 09:06:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:21,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:21,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:21,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:21,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:21,222 INFO L87 Difference]: Start difference. First operand 35306 states and 43555 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:21,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:21,938 INFO L93 Difference]: Finished difference Result 73276 states and 90254 transitions. [2021-12-15 09:06:21,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 218 [2021-12-15 09:06:21,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:21,988 INFO L225 Difference]: With dead ends: 73276 [2021-12-15 09:06:21,988 INFO L226 Difference]: Without dead ends: 40824 [2021-12-15 09:06:22,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:22,135 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 200 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:22,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 137 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40824 states. [2021-12-15 09:06:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40824 to 40813. [2021-12-15 09:06:22,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40813 states, 40812 states have (on average 1.2288297559541312) internal successors, (50151), 40812 states have internal predecessors, (50151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40813 states to 40813 states and 50151 transitions. [2021-12-15 09:06:22,634 INFO L78 Accepts]: Start accepts. Automaton has 40813 states and 50151 transitions. Word has length 218 [2021-12-15 09:06:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:22,635 INFO L470 AbstractCegarLoop]: Abstraction has 40813 states and 50151 transitions. [2021-12-15 09:06:22,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 40813 states and 50151 transitions. [2021-12-15 09:06:22,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2021-12-15 09:06:22,657 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:22,657 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:22,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 09:06:22,658 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:22,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:22,658 INFO L85 PathProgramCache]: Analyzing trace with hash -624001430, now seen corresponding path program 1 times [2021-12-15 09:06:22,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:22,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903986967] [2021-12-15 09:06:22,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:22,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-15 09:06:22,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:22,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903986967] [2021-12-15 09:06:22,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903986967] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:22,709 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:22,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:22,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193021323] [2021-12-15 09:06:22,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:22,710 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:22,710 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:22,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:22,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:22,710 INFO L87 Difference]: Start difference. First operand 40813 states and 50151 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:23,488 INFO L93 Difference]: Finished difference Result 88319 states and 107867 transitions. [2021-12-15 09:06:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 233 [2021-12-15 09:06:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:23,539 INFO L225 Difference]: With dead ends: 88319 [2021-12-15 09:06:23,539 INFO L226 Difference]: Without dead ends: 48120 [2021-12-15 09:06:23,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:23,554 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 200 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:23,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 131 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 617 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:06:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48120 states. [2021-12-15 09:06:24,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48120 to 47707. [2021-12-15 09:06:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47707 states, 47706 states have (on average 1.206703559300717) internal successors, (57567), 47706 states have internal predecessors, (57567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:24,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47707 states to 47707 states and 57567 transitions. [2021-12-15 09:06:24,272 INFO L78 Accepts]: Start accepts. Automaton has 47707 states and 57567 transitions. Word has length 233 [2021-12-15 09:06:24,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:24,272 INFO L470 AbstractCegarLoop]: Abstraction has 47707 states and 57567 transitions. [2021-12-15 09:06:24,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:24,272 INFO L276 IsEmpty]: Start isEmpty. Operand 47707 states and 57567 transitions. [2021-12-15 09:06:24,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-15 09:06:24,300 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:24,300 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:24,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-15 09:06:24,301 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:24,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:24,301 INFO L85 PathProgramCache]: Analyzing trace with hash -812822067, now seen corresponding path program 1 times [2021-12-15 09:06:24,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:24,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472785780] [2021-12-15 09:06:24,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:24,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:24,358 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-15 09:06:24,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:24,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472785780] [2021-12-15 09:06:24,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472785780] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:24,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:24,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:24,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599713836] [2021-12-15 09:06:24,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:24,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:24,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:24,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:24,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:24,361 INFO L87 Difference]: Start difference. First operand 47707 states and 57567 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:25,176 INFO L93 Difference]: Finished difference Result 98487 states and 118835 transitions. [2021-12-15 09:06:25,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 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 235 [2021-12-15 09:06:25,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:25,239 INFO L225 Difference]: With dead ends: 98487 [2021-12-15 09:06:25,239 INFO L226 Difference]: Without dead ends: 57097 [2021-12-15 09:06:25,268 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:25,269 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 188 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:25,269 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 138 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 666 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-15 09:06:25,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57097 states. [2021-12-15 09:06:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57097 to 57088. [2021-12-15 09:06:26,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57088 states, 57087 states have (on average 1.2019724280484174) internal successors, (68617), 57087 states have internal predecessors, (68617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:26,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57088 states to 57088 states and 68617 transitions. [2021-12-15 09:06:26,086 INFO L78 Accepts]: Start accepts. Automaton has 57088 states and 68617 transitions. Word has length 235 [2021-12-15 09:06:26,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:26,086 INFO L470 AbstractCegarLoop]: Abstraction has 57088 states and 68617 transitions. [2021-12-15 09:06:26,087 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:26,087 INFO L276 IsEmpty]: Start isEmpty. Operand 57088 states and 68617 transitions. [2021-12-15 09:06:26,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-15 09:06:26,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:26,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:26,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 09:06:26,122 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:26,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:26,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1296665022, now seen corresponding path program 1 times [2021-12-15 09:06:26,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:26,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896028162] [2021-12-15 09:06:26,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:26,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:26,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:06:26,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:26,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896028162] [2021-12-15 09:06:26,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896028162] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:26,209 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:26,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:26,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015480540] [2021-12-15 09:06:26,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:26,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:26,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:26,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:26,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:26,210 INFO L87 Difference]: Start difference. First operand 57088 states and 68617 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:27,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:27,164 INFO L93 Difference]: Finished difference Result 128370 states and 157096 transitions. [2021-12-15 09:06:27,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:27,164 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 242 [2021-12-15 09:06:27,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:27,239 INFO L225 Difference]: With dead ends: 128370 [2021-12-15 09:06:27,239 INFO L226 Difference]: Without dead ends: 71284 [2021-12-15 09:06:27,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:27,265 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 214 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:27,266 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 151 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71284 states. [2021-12-15 09:06:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71284 to 70472. [2021-12-15 09:06:28,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70472 states, 70471 states have (on average 1.1756609101616267) internal successors, (82850), 70471 states have internal predecessors, (82850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:28,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70472 states to 70472 states and 82850 transitions. [2021-12-15 09:06:28,149 INFO L78 Accepts]: Start accepts. Automaton has 70472 states and 82850 transitions. Word has length 242 [2021-12-15 09:06:28,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:28,149 INFO L470 AbstractCegarLoop]: Abstraction has 70472 states and 82850 transitions. [2021-12-15 09:06:28,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:28,150 INFO L276 IsEmpty]: Start isEmpty. Operand 70472 states and 82850 transitions. [2021-12-15 09:06:28,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-12-15 09:06:28,179 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:28,179 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-15 09:06:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-15 09:06:28,179 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:28,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:28,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1078259094, now seen corresponding path program 1 times [2021-12-15 09:06:28,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:28,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109995964] [2021-12-15 09:06:28,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:28,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:28,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 62 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:06:28,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:28,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109995964] [2021-12-15 09:06:28,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109995964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:28,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:28,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:28,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741837093] [2021-12-15 09:06:28,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:28,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:28,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:28,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:28,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:28,242 INFO L87 Difference]: Start difference. First operand 70472 states and 82850 transitions. Second operand has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:29,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:29,139 INFO L93 Difference]: Finished difference Result 134834 states and 158451 transitions. [2021-12-15 09:06:29,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:29,140 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 252 [2021-12-15 09:06:29,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:29,237 INFO L225 Difference]: With dead ends: 134834 [2021-12-15 09:06:29,238 INFO L226 Difference]: Without dead ends: 70675 [2021-12-15 09:06:29,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:29,280 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 172 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:29,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 158 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:06:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70675 states. [2021-12-15 09:06:30,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70675 to 70472. [2021-12-15 09:06:30,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70472 states, 70471 states have (on average 1.1756325296930652) internal successors, (82848), 70471 states have internal predecessors, (82848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:30,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70472 states to 70472 states and 82848 transitions. [2021-12-15 09:06:30,358 INFO L78 Accepts]: Start accepts. Automaton has 70472 states and 82848 transitions. Word has length 252 [2021-12-15 09:06:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:30,358 INFO L470 AbstractCegarLoop]: Abstraction has 70472 states and 82848 transitions. [2021-12-15 09:06:30,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.33333333333333) internal successors, (223), 2 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:30,358 INFO L276 IsEmpty]: Start isEmpty. Operand 70472 states and 82848 transitions. [2021-12-15 09:06:30,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-12-15 09:06:30,388 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:30,388 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, 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] [2021-12-15 09:06:30,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 09:06:30,388 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:30,388 INFO L85 PathProgramCache]: Analyzing trace with hash -836057451, now seen corresponding path program 1 times [2021-12-15 09:06:30,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:30,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642845314] [2021-12-15 09:06:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:30,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:30,451 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 76 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-15 09:06:30,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:30,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642845314] [2021-12-15 09:06:30,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642845314] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:30,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908882989] [2021-12-15 09:06:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:30,452 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:30,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:30,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:30,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-15 09:06:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:30,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:30,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-12-15 09:06:30,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:30,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908882989] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:30,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:30,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-12-15 09:06:30,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528055795] [2021-12-15 09:06:30,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:30,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:30,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:30,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:30,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:30,863 INFO L87 Difference]: Start difference. First operand 70472 states and 82848 transitions. Second operand has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:31,828 INFO L93 Difference]: Finished difference Result 175703 states and 206882 transitions. [2021-12-15 09:06:31,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:31,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-12-15 09:06:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:31,970 INFO L225 Difference]: With dead ends: 175703 [2021-12-15 09:06:31,970 INFO L226 Difference]: Without dead ends: 107265 [2021-12-15 09:06:32,019 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:32,020 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 215 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:32,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 148 Invalid, 692 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:32,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107265 states. [2021-12-15 09:06:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107265 to 94865. [2021-12-15 09:06:33,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94865 states, 94864 states have (on average 1.1647411030527914) internal successors, (110492), 94864 states have internal predecessors, (110492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:33,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94865 states to 94865 states and 110492 transitions. [2021-12-15 09:06:33,528 INFO L78 Accepts]: Start accepts. Automaton has 94865 states and 110492 transitions. Word has length 259 [2021-12-15 09:06:33,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:33,528 INFO L470 AbstractCegarLoop]: Abstraction has 94865 states and 110492 transitions. [2021-12-15 09:06:33,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.0) internal successors, (225), 2 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:33,528 INFO L276 IsEmpty]: Start isEmpty. Operand 94865 states and 110492 transitions. [2021-12-15 09:06:33,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-12-15 09:06:33,559 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:33,559 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:06:33,577 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:33,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:33,760 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:33,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 721693502, now seen corresponding path program 1 times [2021-12-15 09:06:33,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:33,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825789961] [2021-12-15 09:06:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:33,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:33,838 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 09:06:33,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:33,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825789961] [2021-12-15 09:06:33,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825789961] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:33,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:33,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:33,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240434653] [2021-12-15 09:06:33,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:33,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:33,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:33,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:33,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:33,840 INFO L87 Difference]: Start difference. First operand 94865 states and 110492 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:34,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:34,885 INFO L93 Difference]: Finished difference Result 183828 states and 214066 transitions. [2021-12-15 09:06:34,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:34,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 262 [2021-12-15 09:06:34,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:34,992 INFO L225 Difference]: With dead ends: 183828 [2021-12-15 09:06:34,992 INFO L226 Difference]: Without dead ends: 94866 [2021-12-15 09:06:35,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:35,047 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:35,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 153 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94866 states. [2021-12-15 09:06:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94866 to 94865. [2021-12-15 09:06:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94865 states, 94864 states have (on average 1.1647094788328554) internal successors, (110489), 94864 states have internal predecessors, (110489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:36,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94865 states to 94865 states and 110489 transitions. [2021-12-15 09:06:36,485 INFO L78 Accepts]: Start accepts. Automaton has 94865 states and 110489 transitions. Word has length 262 [2021-12-15 09:06:36,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:36,485 INFO L470 AbstractCegarLoop]: Abstraction has 94865 states and 110489 transitions. [2021-12-15 09:06:36,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:36,485 INFO L276 IsEmpty]: Start isEmpty. Operand 94865 states and 110489 transitions. [2021-12-15 09:06:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-12-15 09:06:36,519 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:36,519 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-15 09:06:36,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-15 09:06:36,520 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:36,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1883142043, now seen corresponding path program 1 times [2021-12-15 09:06:36,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:36,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937276717] [2021-12-15 09:06:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:36,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-15 09:06:36,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937276717] [2021-12-15 09:06:36,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937276717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:36,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:36,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 09:06:36,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096276776] [2021-12-15 09:06:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:36,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:36,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:36,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:36,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:36,600 INFO L87 Difference]: Start difference. First operand 94865 states and 110489 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:37,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:37,827 INFO L93 Difference]: Finished difference Result 198118 states and 232433 transitions. [2021-12-15 09:06:37,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:37,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 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 269 [2021-12-15 09:06:37,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:37,965 INFO L225 Difference]: With dead ends: 198118 [2021-12-15 09:06:37,966 INFO L226 Difference]: Without dead ends: 105291 [2021-12-15 09:06:38,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 09:06:38,013 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 151 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:38,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 165 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 706 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105291 states. [2021-12-15 09:06:39,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105291 to 104236. [2021-12-15 09:06:39,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104236 states, 104235 states have (on average 1.178615628147935) internal successors, (122853), 104235 states have internal predecessors, (122853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104236 states to 104236 states and 122853 transitions. [2021-12-15 09:06:39,595 INFO L78 Accepts]: Start accepts. Automaton has 104236 states and 122853 transitions. Word has length 269 [2021-12-15 09:06:39,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:39,595 INFO L470 AbstractCegarLoop]: Abstraction has 104236 states and 122853 transitions. [2021-12-15 09:06:39,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 2 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:39,595 INFO L276 IsEmpty]: Start isEmpty. Operand 104236 states and 122853 transitions. [2021-12-15 09:06:39,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-12-15 09:06:39,628 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:39,628 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:39,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-15 09:06:39,628 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:39,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:39,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1494025400, now seen corresponding path program 1 times [2021-12-15 09:06:39,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:39,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151969501] [2021-12-15 09:06:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:39,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:39,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:39,691 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-12-15 09:06:39,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:39,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151969501] [2021-12-15 09:06:39,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151969501] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:39,692 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 09:06:39,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 09:06:39,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451413885] [2021-12-15 09:06:39,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:39,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 09:06:39,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:39,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 09:06:39,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:39,693 INFO L87 Difference]: Start difference. First operand 104236 states and 122853 transitions. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:41,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:41,021 INFO L93 Difference]: Finished difference Result 242188 states and 287159 transitions. [2021-12-15 09:06:41,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 09:06:41,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 274 [2021-12-15 09:06:41,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:41,191 INFO L225 Difference]: With dead ends: 242188 [2021-12-15 09:06:41,191 INFO L226 Difference]: Without dead ends: 139581 [2021-12-15 09:06:41,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 09:06:41,242 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 733 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 733 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:41,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [733 Valid, 43 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139581 states. [2021-12-15 09:06:42,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139581 to 129806. [2021-12-15 09:06:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129806 states, 129805 states have (on average 1.1706020569315512) internal successors, (151950), 129805 states have internal predecessors, (151950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129806 states to 129806 states and 151950 transitions. [2021-12-15 09:06:43,186 INFO L78 Accepts]: Start accepts. Automaton has 129806 states and 151950 transitions. Word has length 274 [2021-12-15 09:06:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:43,187 INFO L470 AbstractCegarLoop]: Abstraction has 129806 states and 151950 transitions. [2021-12-15 09:06:43,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 3 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 129806 states and 151950 transitions. [2021-12-15 09:06:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-12-15 09:06:43,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:43,226 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:43,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-15 09:06:43,226 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:43,227 INFO L85 PathProgramCache]: Analyzing trace with hash -135019266, now seen corresponding path program 1 times [2021-12-15 09:06:43,227 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:43,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563872920] [2021-12-15 09:06:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:43,227 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:43,297 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-12-15 09:06:43,297 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:43,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563872920] [2021-12-15 09:06:43,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563872920] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:43,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928732520] [2021-12-15 09:06:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:43,298 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:43,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:43,299 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:43,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-15 09:06:43,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:43,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:43,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-12-15 09:06:43,808 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:43,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928732520] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:43,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:43,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:43,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787363941] [2021-12-15 09:06:43,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:43,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:43,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:43,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:43,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:43,809 INFO L87 Difference]: Start difference. First operand 129806 states and 151950 transitions. Second operand has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:45,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:45,129 INFO L93 Difference]: Finished difference Result 297460 states and 349558 transitions. [2021-12-15 09:06:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:45,130 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 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 297 [2021-12-15 09:06:45,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:45,360 INFO L225 Difference]: With dead ends: 297460 [2021-12-15 09:06:45,360 INFO L226 Difference]: Without dead ends: 170504 [2021-12-15 09:06:45,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 296 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:45,439 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:45,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 171 Invalid, 690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-15 09:06:45,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170504 states. [2021-12-15 09:06:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170504 to 140169. [2021-12-15 09:06:47,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140169 states, 140168 states have (on average 1.1676702243022659) internal successors, (163670), 140168 states have internal predecessors, (163670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140169 states to 140169 states and 163670 transitions. [2021-12-15 09:06:47,854 INFO L78 Accepts]: Start accepts. Automaton has 140169 states and 163670 transitions. Word has length 297 [2021-12-15 09:06:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:47,854 INFO L470 AbstractCegarLoop]: Abstraction has 140169 states and 163670 transitions. [2021-12-15 09:06:47,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.66666666666667) internal successors, (233), 3 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 140169 states and 163670 transitions. [2021-12-15 09:06:47,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2021-12-15 09:06:47,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:47,899 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:06:47,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-15 09:06:48,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:48,100 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:48,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:48,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1781536830, now seen corresponding path program 1 times [2021-12-15 09:06:48,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:48,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951976315] [2021-12-15 09:06:48,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:48,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:48,486 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 74 proven. 6 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-12-15 09:06:48,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951976315] [2021-12-15 09:06:48,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951976315] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:48,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464249218] [2021-12-15 09:06:48,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:48,487 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:48,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:48,488 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:48,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-15 09:06:48,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:48,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 554 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:48,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:48,946 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 108 proven. 0 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-12-15 09:06:48,947 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:48,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464249218] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:48,947 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:48,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:48,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351839551] [2021-12-15 09:06:48,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:48,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:48,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:48,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:48,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:48,949 INFO L87 Difference]: Start difference. First operand 140169 states and 163670 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:50,021 INFO L93 Difference]: Finished difference Result 267322 states and 311728 transitions. [2021-12-15 09:06:50,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:50,021 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 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 299 [2021-12-15 09:06:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:50,182 INFO L225 Difference]: With dead ends: 267322 [2021-12-15 09:06:50,182 INFO L226 Difference]: Without dead ends: 128781 [2021-12-15 09:06:50,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:50,264 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 76 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:50,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 290 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-15 09:06:50,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128781 states. [2021-12-15 09:06:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128781 to 124716. [2021-12-15 09:06:52,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124716 states, 124715 states have (on average 1.145932726616686) internal successors, (142915), 124715 states have internal predecessors, (142915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:52,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124716 states to 124716 states and 142915 transitions. [2021-12-15 09:06:52,304 INFO L78 Accepts]: Start accepts. Automaton has 124716 states and 142915 transitions. Word has length 299 [2021-12-15 09:06:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:52,304 INFO L470 AbstractCegarLoop]: Abstraction has 124716 states and 142915 transitions. [2021-12-15 09:06:52,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:52,305 INFO L276 IsEmpty]: Start isEmpty. Operand 124716 states and 142915 transitions. [2021-12-15 09:06:52,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-12-15 09:06:52,346 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:52,347 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-15 09:06:52,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:52,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-15 09:06:52,548 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:52,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:52,549 INFO L85 PathProgramCache]: Analyzing trace with hash 647207008, now seen corresponding path program 1 times [2021-12-15 09:06:52,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:52,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460361078] [2021-12-15 09:06:52,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:52,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:52,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:52,626 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 80 proven. 6 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-12-15 09:06:52,627 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460361078] [2021-12-15 09:06:52,627 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460361078] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:52,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357572925] [2021-12-15 09:06:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:52,628 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:52,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:52,629 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:52,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-15 09:06:52,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:52,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-15 09:06:52,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:53,153 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 114 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-12-15 09:06:53,154 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:53,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357572925] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:53,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:53,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:53,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804887557] [2021-12-15 09:06:53,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:53,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:53,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:53,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:53,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:53,155 INFO L87 Difference]: Start difference. First operand 124716 states and 142915 transitions. Second operand has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:54,410 INFO L93 Difference]: Finished difference Result 240117 states and 275092 transitions. [2021-12-15 09:06:54,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:54,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 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 303 [2021-12-15 09:06:54,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 09:06:54,553 INFO L225 Difference]: With dead ends: 240117 [2021-12-15 09:06:54,553 INFO L226 Difference]: Without dead ends: 115809 [2021-12-15 09:06:54,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 302 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:54,636 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 37 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-15 09:06:54,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 338 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-15 09:06:54,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115809 states. [2021-12-15 09:06:56,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115809 to 115376. [2021-12-15 09:06:56,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115376 states, 115375 states have (on average 1.1350812567713977) internal successors, (130960), 115375 states have internal predecessors, (130960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:56,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115376 states to 115376 states and 130960 transitions. [2021-12-15 09:06:56,375 INFO L78 Accepts]: Start accepts. Automaton has 115376 states and 130960 transitions. Word has length 303 [2021-12-15 09:06:56,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 09:06:56,376 INFO L470 AbstractCegarLoop]: Abstraction has 115376 states and 130960 transitions. [2021-12-15 09:06:56,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.33333333333333) internal successors, (265), 3 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:56,376 INFO L276 IsEmpty]: Start isEmpty. Operand 115376 states and 130960 transitions. [2021-12-15 09:06:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-15 09:06:56,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 09:06:56,443 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 09:06:56,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-15 09:06:56,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:56,645 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 09:06:56,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 09:06:56,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1290078779, now seen corresponding path program 1 times [2021-12-15 09:06:56,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 09:06:56,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128392608] [2021-12-15 09:06:56,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:56,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 09:06:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:56,716 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-15 09:06:56,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 09:06:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128392608] [2021-12-15 09:06:56,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128392608] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 09:06:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672000361] [2021-12-15 09:06:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 09:06:56,717 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 09:06:56,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 09:06:56,718 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 09:06:56,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-15 09:06:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 09:06:56,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 09:06:56,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 09:06:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 224 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-12-15 09:06:57,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 09:06:57,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672000361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 09:06:57,188 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-15 09:06:57,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-12-15 09:06:57,188 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652477026] [2021-12-15 09:06:57,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 09:06:57,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 09:06:57,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 09:06:57,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 09:06:57,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-15 09:06:57,189 INFO L87 Difference]: Start difference. First operand 115376 states and 130960 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 09:06:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 09:06:58,349 INFO L93 Difference]: Finished difference Result 193290 states and 218733 transitions. [2021-12-15 09:06:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 09:06:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 341 [2021-12-15 09:06:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted.