./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.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 5f06498eb80e802eba7f35e8b89bda4b42e6ab2a6a5c4854a4d889d75d8cafdd --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 14:47:28,127 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 14:47:28,133 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 14:47:28,155 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 14:47:28,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 14:47:28,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 14:47:28,166 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 14:47:28,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 14:47:28,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 14:47:28,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 14:47:28,174 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 14:47:28,175 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 14:47:28,176 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 14:47:28,176 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 14:47:28,179 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 14:47:28,179 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 14:47:28,180 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 14:47:28,180 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 14:47:28,182 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 14:47:28,187 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 14:47:28,188 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 14:47:28,190 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 14:47:28,191 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 14:47:28,192 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 14:47:28,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 14:47:28,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 14:47:28,197 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 14:47:28,198 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 14:47:28,198 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 14:47:28,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 14:47:28,199 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 14:47:28,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 14:47:28,200 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 14:47:28,200 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 14:47:28,202 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 14:47:28,202 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 14:47:28,202 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 14:47:28,203 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 14:47:28,204 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 14:47:28,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 14:47:28,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 14:47:28,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 14:47:28,223 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 14:47:28,224 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 14:47:28,224 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 14:47:28,224 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 14:47:28,225 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 14:47:28,225 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 14:47:28,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 14:47:28,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 14:47:28,225 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 14:47:28,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 14:47:28,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 14:47:28,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 14:47:28,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:47:28,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 14:47:28,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 14:47:28,229 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 14:47:28,229 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 14:47:28,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 14:47:28,229 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 14:47:28,229 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5f06498eb80e802eba7f35e8b89bda4b42e6ab2a6a5c4854a4d889d75d8cafdd [2021-12-21 14:47:28,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 14:47:28,461 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 14:47:28,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 14:47:28,463 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 14:47:28,464 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 14:47:28,465 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-21 14:47:28,521 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde853096/702719dc8dd04cd78000728a1ecc6518/FLAG24301a371 [2021-12-21 14:47:29,007 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 14:47:29,009 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-21 14:47:29,040 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde853096/702719dc8dd04cd78000728a1ecc6518/FLAG24301a371 [2021-12-21 14:47:29,257 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cde853096/702719dc8dd04cd78000728a1ecc6518 [2021-12-21 14:47:29,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 14:47:29,266 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 14:47:29,267 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 14:47:29,267 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 14:47:29,271 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 14:47:29,279 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:47:29" (1/1) ... [2021-12-21 14:47:29,280 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@597ab5b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:29, skipping insertion in model container [2021-12-21 14:47:29,280 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 02:47:29" (1/1) ... [2021-12-21 14:47:29,285 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 14:47:29,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 14:47:29,956 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26888,26901] [2021-12-21 14:47:29,986 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28763,28776] [2021-12-21 14:47:30,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:47:30,463 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 14:47:30,499 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[26888,26901] [2021-12-21 14:47:30,510 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/combinations/pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c[28763,28776] [2021-12-21 14:47:30,834 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 14:47:30,854 INFO L208 MainTranslator]: Completed translation [2021-12-21 14:47:30,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30 WrapperNode [2021-12-21 14:47:30,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 14:47:30,855 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 14:47:30,856 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 14:47:30,856 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 14:47:30,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:30,900 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,228 INFO L137 Inliner]: procedures = 40, calls = 25, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 5279 [2021-12-21 14:47:31,228 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 14:47:31,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 14:47:31,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 14:47:31,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 14:47:31,250 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,250 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,298 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,501 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,535 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,553 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 14:47:31,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 14:47:31,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 14:47:31,593 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 14:47:31,596 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (1/1) ... [2021-12-21 14:47:31,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 14:47:31,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 14:47:31,639 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) [2021-12-21 14:47:31,642 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 [2021-12-21 14:47:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 14:47:31,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 14:47:31,673 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 14:47:31,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 14:47:31,764 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 14:47:31,765 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 14:47:34,404 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 14:47:34,413 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 14:47:34,413 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-21 14:47:34,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:47:34 BoogieIcfgContainer [2021-12-21 14:47:34,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 14:47:34,417 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 14:47:34,417 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 14:47:34,419 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 14:47:34,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 02:47:29" (1/3) ... [2021-12-21 14:47:34,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527154da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:47:34, skipping insertion in model container [2021-12-21 14:47:34,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 02:47:30" (2/3) ... [2021-12-21 14:47:34,420 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@527154da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 02:47:34, skipping insertion in model container [2021-12-21 14:47:34,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 02:47:34" (3/3) ... [2021-12-21 14:47:34,421 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.8.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-21 14:47:34,424 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 14:47:34,424 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-21 14:47:34,454 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 14:47:34,458 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 [2021-12-21 14:47:34,458 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-21 14:47:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-21 14:47:34,492 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:34,492 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 14:47:34,492 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:34,498 INFO L85 PathProgramCache]: Analyzing trace with hash -34194955, now seen corresponding path program 1 times [2021-12-21 14:47:34,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:34,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578346957] [2021-12-21 14:47:34,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:34,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:34,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:34,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578346957] [2021-12-21 14:47:34,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578346957] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:34,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:34,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:47:34,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570741900] [2021-12-21 14:47:34,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:34,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:34,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:34,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:34,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:34,711 INFO L87 Difference]: Start difference. First operand has 965 states, 962 states have (on average 1.8960498960498962) internal successors, (1824), 964 states have internal predecessors, (1824), 0 states have call successors, (0), 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 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:37,004 INFO L93 Difference]: Finished difference Result 2616 states and 5018 transitions. [2021-12-21 14:47:37,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:37,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-21 14:47:37,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:37,037 INFO L225 Difference]: With dead ends: 2616 [2021-12-21 14:47:37,037 INFO L226 Difference]: Without dead ends: 1650 [2021-12-21 14:47:37,042 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 [2021-12-21 14:47:37,044 INFO L933 BasicCegarLoop]: 724 mSDtfsCounter, 1071 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1071 SdHoareTripleChecker+Valid, 735 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:37,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1071 Valid, 735 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-21 14:47:37,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-21 14:47:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-21 14:47:37,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.6492718446601942) internal successors, (2718), 1649 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2718 transitions. [2021-12-21 14:47:37,138 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2718 transitions. Word has length 16 [2021-12-21 14:47:37,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:37,138 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2718 transitions. [2021-12-21 14:47:37,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2718 transitions. [2021-12-21 14:47:37,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-21 14:47:37,140 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:37,140 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] [2021-12-21 14:47:37,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 14:47:37,141 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:37,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:37,141 INFO L85 PathProgramCache]: Analyzing trace with hash 2117945689, now seen corresponding path program 1 times [2021-12-21 14:47:37,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20386803] [2021-12-21 14:47:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:37,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:37,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:37,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:37,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:37,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20386803] [2021-12-21 14:47:37,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20386803] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:37,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:37,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:47:37,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649930232] [2021-12-21 14:47:37,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:37,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:47:37,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:37,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:47:37,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:47:37,214 INFO L87 Difference]: Start difference. First operand 1650 states and 2718 transitions. Second operand has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:37,280 INFO L93 Difference]: Finished difference Result 1732 states and 2846 transitions. [2021-12-21 14:47:37,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-21 14:47:37,280 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-21 14:47:37,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:37,285 INFO L225 Difference]: With dead ends: 1732 [2021-12-21 14:47:37,285 INFO L226 Difference]: Without dead ends: 1650 [2021-12-21 14:47:37,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-21 14:47:37,286 INFO L933 BasicCegarLoop]: 1689 mSDtfsCounter, 3 mSDsluCounter, 5003 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6692 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:37,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6692 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:37,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1650 states. [2021-12-21 14:47:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1650 to 1650. [2021-12-21 14:47:37,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1648 states have (on average 1.612257281553398) internal successors, (2657), 1649 states have internal predecessors, (2657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2657 transitions. [2021-12-21 14:47:37,309 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2657 transitions. Word has length 46 [2021-12-21 14:47:37,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:37,309 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2657 transitions. [2021-12-21 14:47:37,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.2) internal successors, (46), 5 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:37,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2657 transitions. [2021-12-21 14:47:37,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-21 14:47:37,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:37,312 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] [2021-12-21 14:47:37,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 14:47:37,312 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:37,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:37,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1258624732, now seen corresponding path program 1 times [2021-12-21 14:47:37,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:37,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099911422] [2021-12-21 14:47:37,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:37,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:37,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:37,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:37,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099911422] [2021-12-21 14:47:37,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099911422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:37,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:37,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:37,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798461223] [2021-12-21 14:47:37,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:37,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:37,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:37,419 INFO L87 Difference]: Start difference. First operand 1650 states and 2657 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:40,081 INFO L93 Difference]: Finished difference Result 4656 states and 7584 transitions. [2021-12-21 14:47:40,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-21 14:47:40,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:40,091 INFO L225 Difference]: With dead ends: 4656 [2021-12-21 14:47:40,091 INFO L226 Difference]: Without dead ends: 3152 [2021-12-21 14:47:40,093 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 [2021-12-21 14:47:40,094 INFO L933 BasicCegarLoop]: 1340 mSDtfsCounter, 753 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 1539 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:40,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 1539 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-21 14:47:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3152 states. [2021-12-21 14:47:40,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3152 to 3152. [2021-12-21 14:47:40,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3152 states, 3150 states have (on average 1.527936507936508) internal successors, (4813), 3151 states have internal predecessors, (4813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:40,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3152 states to 3152 states and 4813 transitions. [2021-12-21 14:47:40,133 INFO L78 Accepts]: Start accepts. Automaton has 3152 states and 4813 transitions. Word has length 87 [2021-12-21 14:47:40,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:40,134 INFO L470 AbstractCegarLoop]: Abstraction has 3152 states and 4813 transitions. [2021-12-21 14:47:40,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:40,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3152 states and 4813 transitions. [2021-12-21 14:47:40,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-21 14:47:40,135 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:40,135 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] [2021-12-21 14:47:40,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 14:47:40,136 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:40,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:40,136 INFO L85 PathProgramCache]: Analyzing trace with hash 368682225, now seen corresponding path program 1 times [2021-12-21 14:47:40,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:40,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569733308] [2021-12-21 14:47:40,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:40,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:40,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:40,197 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:40,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569733308] [2021-12-21 14:47:40,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569733308] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:40,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:40,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:47:40,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66881194] [2021-12-21 14:47:40,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:40,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:40,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:40,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:40,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:40,199 INFO L87 Difference]: Start difference. First operand 3152 states and 4813 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:42,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:42,538 INFO L93 Difference]: Finished difference Result 9164 states and 14053 transitions. [2021-12-21 14:47:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:42,539 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-21 14:47:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:42,556 INFO L225 Difference]: With dead ends: 9164 [2021-12-21 14:47:42,557 INFO L226 Difference]: Without dead ends: 6158 [2021-12-21 14:47:42,561 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 [2021-12-21 14:47:42,562 INFO L933 BasicCegarLoop]: 684 mSDtfsCounter, 917 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2272 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 917 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:42,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [917 Valid, 691 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2272 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-21 14:47:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6158 states. [2021-12-21 14:47:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6158 to 6156. [2021-12-21 14:47:42,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6156 states, 6154 states have (on average 1.3639909002274944) internal successors, (8394), 6155 states have internal predecessors, (8394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:42,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6156 states to 6156 states and 8394 transitions. [2021-12-21 14:47:42,660 INFO L78 Accepts]: Start accepts. Automaton has 6156 states and 8394 transitions. Word has length 90 [2021-12-21 14:47:42,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:42,662 INFO L470 AbstractCegarLoop]: Abstraction has 6156 states and 8394 transitions. [2021-12-21 14:47:42,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 2 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 6156 states and 8394 transitions. [2021-12-21 14:47:42,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 14:47:42,664 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:42,664 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] [2021-12-21 14:47:42,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 14:47:42,665 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:42,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:42,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1647713710, now seen corresponding path program 1 times [2021-12-21 14:47:42,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:42,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086276844] [2021-12-21 14:47:42,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:42,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:42,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:42,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086276844] [2021-12-21 14:47:42,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086276844] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:42,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:42,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:47:42,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053788828] [2021-12-21 14:47:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:42,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:42,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:42,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:42,774 INFO L87 Difference]: Start difference. First operand 6156 states and 8394 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:45,271 INFO L93 Difference]: Finished difference Result 18176 states and 24796 transitions. [2021-12-21 14:47:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:45,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-21 14:47:45,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:45,311 INFO L225 Difference]: With dead ends: 18176 [2021-12-21 14:47:45,312 INFO L226 Difference]: Without dead ends: 12166 [2021-12-21 14:47:45,321 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 [2021-12-21 14:47:45,323 INFO L933 BasicCegarLoop]: 779 mSDtfsCounter, 1106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2387 mSolverCounterSat, 550 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1106 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 550 IncrementalHoareTripleChecker+Valid, 2387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:45,325 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1106 Valid, 786 Invalid, 2937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [550 Valid, 2387 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-21 14:47:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12166 states. [2021-12-21 14:47:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12166 to 12164. [2021-12-21 14:47:45,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12164 states, 12162 states have (on average 1.2800526229238611) internal successors, (15568), 12163 states have internal predecessors, (15568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12164 states to 12164 states and 15568 transitions. [2021-12-21 14:47:45,502 INFO L78 Accepts]: Start accepts. Automaton has 12164 states and 15568 transitions. Word has length 91 [2021-12-21 14:47:45,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:45,505 INFO L470 AbstractCegarLoop]: Abstraction has 12164 states and 15568 transitions. [2021-12-21 14:47:45,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 12164 states and 15568 transitions. [2021-12-21 14:47:45,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:45,509 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:45,509 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] [2021-12-21 14:47:45,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 14:47:45,510 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:45,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:45,514 INFO L85 PathProgramCache]: Analyzing trace with hash 211182729, now seen corresponding path program 1 times [2021-12-21 14:47:45,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:45,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229547360] [2021-12-21 14:47:45,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:45,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:45,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:45,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:45,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229547360] [2021-12-21 14:47:45,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229547360] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:45,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:45,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:45,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808411365] [2021-12-21 14:47:45,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:45,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:45,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:45,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:45,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:45,587 INFO L87 Difference]: Start difference. First operand 12164 states and 15568 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:45,627 INFO L93 Difference]: Finished difference Result 12314 states and 15806 transitions. [2021-12-21 14:47:45,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:45,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:45,656 INFO L225 Difference]: With dead ends: 12314 [2021-12-21 14:47:45,656 INFO L226 Difference]: Without dead ends: 12236 [2021-12-21 14:47:45,658 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 [2021-12-21 14:47:45,659 INFO L933 BasicCegarLoop]: 1724 mSDtfsCounter, 1549 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:45,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1850 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:45,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12236 states. [2021-12-21 14:47:45,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12236 to 12234. [2021-12-21 14:47:45,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12234 states, 12232 states have (on average 1.2818835840418574) internal successors, (15680), 12233 states have internal predecessors, (15680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12234 states to 12234 states and 15680 transitions. [2021-12-21 14:47:45,830 INFO L78 Accepts]: Start accepts. Automaton has 12234 states and 15680 transitions. Word has length 106 [2021-12-21 14:47:45,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:45,830 INFO L470 AbstractCegarLoop]: Abstraction has 12234 states and 15680 transitions. [2021-12-21 14:47:45,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,830 INFO L276 IsEmpty]: Start isEmpty. Operand 12234 states and 15680 transitions. [2021-12-21 14:47:45,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:45,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:45,831 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] [2021-12-21 14:47:45,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 14:47:45,832 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:45,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:45,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1458691583, now seen corresponding path program 1 times [2021-12-21 14:47:45,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:45,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914188690] [2021-12-21 14:47:45,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:45,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:45,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:45,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914188690] [2021-12-21 14:47:45,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914188690] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:45,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:45,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:45,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003723228] [2021-12-21 14:47:45,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:45,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:45,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:45,911 INFO L87 Difference]: Start difference. First operand 12234 states and 15680 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:45,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:45,961 INFO L93 Difference]: Finished difference Result 12518 states and 16132 transitions. [2021-12-21 14:47:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:45,980 INFO L225 Difference]: With dead ends: 12518 [2021-12-21 14:47:45,981 INFO L226 Difference]: Without dead ends: 12370 [2021-12-21 14:47:45,986 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 [2021-12-21 14:47:45,989 INFO L933 BasicCegarLoop]: 1719 mSDtfsCounter, 1545 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1545 SdHoareTripleChecker+Valid, 1849 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:45,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1545 Valid, 1849 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:45,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12370 states. [2021-12-21 14:47:46,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12370 to 12368. [2021-12-21 14:47:46,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12368 states, 12366 states have (on average 1.2852175319424228) internal successors, (15893), 12367 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12368 states to 12368 states and 15893 transitions. [2021-12-21 14:47:46,198 INFO L78 Accepts]: Start accepts. Automaton has 12368 states and 15893 transitions. Word has length 106 [2021-12-21 14:47:46,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:46,198 INFO L470 AbstractCegarLoop]: Abstraction has 12368 states and 15893 transitions. [2021-12-21 14:47:46,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,198 INFO L276 IsEmpty]: Start isEmpty. Operand 12368 states and 15893 transitions. [2021-12-21 14:47:46,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:46,199 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:46,199 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] [2021-12-21 14:47:46,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 14:47:46,199 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash 717259381, now seen corresponding path program 1 times [2021-12-21 14:47:46,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:46,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794878763] [2021-12-21 14:47:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:46,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:46,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:46,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:46,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794878763] [2021-12-21 14:47:46,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794878763] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:46,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:46,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:46,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051219353] [2021-12-21 14:47:46,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:46,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:46,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:46,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:46,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:46,338 INFO L87 Difference]: Start difference. First operand 12368 states and 15893 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:46,433 INFO L93 Difference]: Finished difference Result 12908 states and 16751 transitions. [2021-12-21 14:47:46,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:46,434 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:46,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:46,449 INFO L225 Difference]: With dead ends: 12908 [2021-12-21 14:47:46,449 INFO L226 Difference]: Without dead ends: 12626 [2021-12-21 14:47:46,453 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 [2021-12-21 14:47:46,453 INFO L933 BasicCegarLoop]: 1714 mSDtfsCounter, 1541 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1541 SdHoareTripleChecker+Valid, 1848 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:46,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1541 Valid, 1848 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:46,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12626 states. [2021-12-21 14:47:46,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12626 to 12624. [2021-12-21 14:47:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12624 states, 12622 states have (on average 1.2911582950404057) internal successors, (16297), 12623 states have internal predecessors, (16297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12624 states to 12624 states and 16297 transitions. [2021-12-21 14:47:46,576 INFO L78 Accepts]: Start accepts. Automaton has 12624 states and 16297 transitions. Word has length 106 [2021-12-21 14:47:46,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:46,576 INFO L470 AbstractCegarLoop]: Abstraction has 12624 states and 16297 transitions. [2021-12-21 14:47:46,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,576 INFO L276 IsEmpty]: Start isEmpty. Operand 12624 states and 16297 transitions. [2021-12-21 14:47:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:46,577 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:46,579 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] [2021-12-21 14:47:46,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 14:47:46,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:46,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:46,580 INFO L85 PathProgramCache]: Analyzing trace with hash -28323349, now seen corresponding path program 1 times [2021-12-21 14:47:46,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:46,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783263338] [2021-12-21 14:47:46,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:46,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:46,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783263338] [2021-12-21 14:47:46,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783263338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:46,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535427892] [2021-12-21 14:47:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:46,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:46,631 INFO L87 Difference]: Start difference. First operand 12624 states and 16297 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:46,689 INFO L93 Difference]: Finished difference Result 13652 states and 17923 transitions. [2021-12-21 14:47:46,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:46,689 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:46,705 INFO L225 Difference]: With dead ends: 13652 [2021-12-21 14:47:46,706 INFO L226 Difference]: Without dead ends: 13114 [2021-12-21 14:47:46,708 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 [2021-12-21 14:47:46,710 INFO L933 BasicCegarLoop]: 1709 mSDtfsCounter, 1537 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1537 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:46,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1537 Valid, 1847 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:46,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13114 states. [2021-12-21 14:47:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13114 to 13112. [2021-12-21 14:47:46,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13112 states, 13110 states have (on average 1.3013729977116706) internal successors, (17061), 13111 states have internal predecessors, (17061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13112 states to 13112 states and 17061 transitions. [2021-12-21 14:47:46,851 INFO L78 Accepts]: Start accepts. Automaton has 13112 states and 17061 transitions. Word has length 106 [2021-12-21 14:47:46,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:46,851 INFO L470 AbstractCegarLoop]: Abstraction has 13112 states and 17061 transitions. [2021-12-21 14:47:46,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 13112 states and 17061 transitions. [2021-12-21 14:47:46,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:46,852 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:46,852 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] [2021-12-21 14:47:46,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 14:47:46,855 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:46,856 INFO L85 PathProgramCache]: Analyzing trace with hash -1968354207, now seen corresponding path program 1 times [2021-12-21 14:47:46,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:46,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747069422] [2021-12-21 14:47:46,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:46,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:46,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:46,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:46,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747069422] [2021-12-21 14:47:46,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747069422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:46,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:46,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:46,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735011495] [2021-12-21 14:47:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:46,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:46,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:46,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:46,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:46,902 INFO L87 Difference]: Start difference. First operand 13112 states and 17061 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:46,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:46,987 INFO L93 Difference]: Finished difference Result 15068 states and 20135 transitions. [2021-12-21 14:47:46,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:46,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:46,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:47,009 INFO L225 Difference]: With dead ends: 15068 [2021-12-21 14:47:47,010 INFO L226 Difference]: Without dead ends: 14042 [2021-12-21 14:47:47,015 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 [2021-12-21 14:47:47,016 INFO L933 BasicCegarLoop]: 1704 mSDtfsCounter, 1533 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1533 SdHoareTripleChecker+Valid, 1846 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1533 Valid, 1846 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14042 states. [2021-12-21 14:47:47,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14042 to 14040. [2021-12-21 14:47:47,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14040 states, 14038 states have (on average 1.3179227810229377) internal successors, (18501), 14039 states have internal predecessors, (18501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14040 states to 14040 states and 18501 transitions. [2021-12-21 14:47:47,173 INFO L78 Accepts]: Start accepts. Automaton has 14040 states and 18501 transitions. Word has length 106 [2021-12-21 14:47:47,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:47,173 INFO L470 AbstractCegarLoop]: Abstraction has 14040 states and 18501 transitions. [2021-12-21 14:47:47,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,174 INFO L276 IsEmpty]: Start isEmpty. Operand 14040 states and 18501 transitions. [2021-12-21 14:47:47,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:47,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:47,174 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] [2021-12-21 14:47:47,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 14:47:47,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:47,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:47,175 INFO L85 PathProgramCache]: Analyzing trace with hash 732328407, now seen corresponding path program 1 times [2021-12-21 14:47:47,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:47,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589463456] [2021-12-21 14:47:47,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:47,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:47,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:47,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589463456] [2021-12-21 14:47:47,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589463456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:47,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:47,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:47,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463879878] [2021-12-21 14:47:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:47,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:47,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:47,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:47,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:47,222 INFO L87 Difference]: Start difference. First operand 14040 states and 18501 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:47,395 INFO L93 Difference]: Finished difference Result 17756 states and 24295 transitions. [2021-12-21 14:47:47,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:47,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:47,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:47,419 INFO L225 Difference]: With dead ends: 17756 [2021-12-21 14:47:47,419 INFO L226 Difference]: Without dead ends: 15802 [2021-12-21 14:47:47,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:47,425 INFO L933 BasicCegarLoop]: 1699 mSDtfsCounter, 1529 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:47,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 1845 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:47,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15802 states. [2021-12-21 14:47:47,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15802 to 15800. [2021-12-21 14:47:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15800 states, 15798 states have (on average 1.342258513735916) internal successors, (21205), 15799 states have internal predecessors, (21205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15800 states to 15800 states and 21205 transitions. [2021-12-21 14:47:47,639 INFO L78 Accepts]: Start accepts. Automaton has 15800 states and 21205 transitions. Word has length 106 [2021-12-21 14:47:47,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:47,640 INFO L470 AbstractCegarLoop]: Abstraction has 15800 states and 21205 transitions. [2021-12-21 14:47:47,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,641 INFO L276 IsEmpty]: Start isEmpty. Operand 15800 states and 21205 transitions. [2021-12-21 14:47:47,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:47,641 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:47,642 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] [2021-12-21 14:47:47,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 14:47:47,642 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:47,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:47,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1070121549, now seen corresponding path program 1 times [2021-12-21 14:47:47,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:47,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905900694] [2021-12-21 14:47:47,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:47,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:47,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:47,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:47,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905900694] [2021-12-21 14:47:47,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905900694] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:47,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:47,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:47,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799054918] [2021-12-21 14:47:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:47,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:47,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:47,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:47,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:47,694 INFO L87 Difference]: Start difference. First operand 15800 states and 21205 transitions. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:47,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:47,883 INFO L93 Difference]: Finished difference Result 22844 states and 32087 transitions. [2021-12-21 14:47:47,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:47,883 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:47,911 INFO L225 Difference]: With dead ends: 22844 [2021-12-21 14:47:47,912 INFO L226 Difference]: Without dead ends: 19130 [2021-12-21 14:47:47,920 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 [2021-12-21 14:47:47,921 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 1525 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1525 SdHoareTripleChecker+Valid, 1844 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:47,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1525 Valid, 1844 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:47,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19130 states. [2021-12-21 14:47:48,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19130 to 19128. [2021-12-21 14:47:48,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19128 states, 19126 states have (on average 1.3730523894175468) internal successors, (26261), 19127 states have internal predecessors, (26261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19128 states to 19128 states and 26261 transitions. [2021-12-21 14:47:48,360 INFO L78 Accepts]: Start accepts. Automaton has 19128 states and 26261 transitions. Word has length 106 [2021-12-21 14:47:48,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:48,361 INFO L470 AbstractCegarLoop]: Abstraction has 19128 states and 26261 transitions. [2021-12-21 14:47:48,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:48,362 INFO L276 IsEmpty]: Start isEmpty. Operand 19128 states and 26261 transitions. [2021-12-21 14:47:48,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-21 14:47:48,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:48,363 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] [2021-12-21 14:47:48,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 14:47:48,363 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:48,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:48,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1478760321, now seen corresponding path program 1 times [2021-12-21 14:47:48,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:48,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494784915] [2021-12-21 14:47:48,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:48,364 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:48,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:48,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:48,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494784915] [2021-12-21 14:47:48,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494784915] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:48,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:48,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:47:48,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223655635] [2021-12-21 14:47:48,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:48,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:47:48,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:48,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:47:48,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:47:48,461 INFO L87 Difference]: Start difference. First operand 19128 states and 26261 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:52,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:52,231 INFO L93 Difference]: Finished difference Result 131800 states and 199333 transitions. [2021-12-21 14:47:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-12-21 14:47:52,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-12-21 14:47:52,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:52,481 INFO L225 Difference]: With dead ends: 131800 [2021-12-21 14:47:52,482 INFO L226 Difference]: Without dead ends: 124758 [2021-12-21 14:47:52,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-12-21 14:47:52,516 INFO L933 BasicCegarLoop]: 1626 mSDtfsCounter, 15488 mSDsluCounter, 3243 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15488 SdHoareTripleChecker+Valid, 4869 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:52,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15488 Valid, 4869 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:47:52,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124758 states. [2021-12-21 14:47:54,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124758 to 26168. [2021-12-21 14:47:54,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26168 states, 26166 states have (on average 1.407207826951005) internal successors, (36821), 26167 states have internal predecessors, (36821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26168 states to 26168 states and 36821 transitions. [2021-12-21 14:47:54,155 INFO L78 Accepts]: Start accepts. Automaton has 26168 states and 36821 transitions. Word has length 106 [2021-12-21 14:47:54,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:54,155 INFO L470 AbstractCegarLoop]: Abstraction has 26168 states and 36821 transitions. [2021-12-21 14:47:54,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 26168 states and 36821 transitions. [2021-12-21 14:47:54,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 14:47:54,157 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:54,157 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] [2021-12-21 14:47:54,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 14:47:54,158 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:54,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:54,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1961193007, now seen corresponding path program 1 times [2021-12-21 14:47:54,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:54,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216606452] [2021-12-21 14:47:54,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:54,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:54,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:54,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216606452] [2021-12-21 14:47:54,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216606452] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:54,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:54,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:47:54,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237499182] [2021-12-21 14:47:54,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:54,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:47:54,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:54,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:47:54,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:47:54,207 INFO L87 Difference]: Start difference. First operand 26168 states and 36821 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:56,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:47:56,337 INFO L93 Difference]: Finished difference Result 52924 states and 77143 transitions. [2021-12-21 14:47:56,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:47:56,338 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-21 14:47:56,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:47:56,389 INFO L225 Difference]: With dead ends: 52924 [2021-12-21 14:47:56,390 INFO L226 Difference]: Without dead ends: 38842 [2021-12-21 14:47:56,411 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 [2021-12-21 14:47:56,412 INFO L933 BasicCegarLoop]: 1627 mSDtfsCounter, 1516 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1516 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:47:56,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1516 Valid, 1744 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:47:56,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38842 states. [2021-12-21 14:47:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38842 to 38584. [2021-12-21 14:47:58,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.422139857964854) internal successors, (54869), 38583 states have internal predecessors, (54869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:58,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54869 transitions. [2021-12-21 14:47:58,329 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54869 transitions. Word has length 108 [2021-12-21 14:47:58,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:47:58,329 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54869 transitions. [2021-12-21 14:47:58,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:47:58,330 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54869 transitions. [2021-12-21 14:47:58,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-12-21 14:47:58,330 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:47:58,331 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] [2021-12-21 14:47:58,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 14:47:58,331 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:47:58,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:47:58,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1894699495, now seen corresponding path program 1 times [2021-12-21 14:47:58,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:47:58,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719754620] [2021-12-21 14:47:58,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:47:58,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:47:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:47:58,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:47:58,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:47:58,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719754620] [2021-12-21 14:47:58,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719754620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:47:58,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:47:58,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 14:47:58,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924417520] [2021-12-21 14:47:58,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:47:58,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 14:47:58,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:47:58,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 14:47:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-12-21 14:47:58,573 INFO L87 Difference]: Start difference. First operand 38584 states and 54869 transitions. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:00,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:48:00,720 INFO L93 Difference]: Finished difference Result 65084 states and 94295 transitions. [2021-12-21 14:48:00,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 14:48:00,721 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 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 108 [2021-12-21 14:48:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:48:00,776 INFO L225 Difference]: With dead ends: 65084 [2021-12-21 14:48:00,776 INFO L226 Difference]: Without dead ends: 38586 [2021-12-21 14:48:00,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-12-21 14:48:00,806 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 9676 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9676 SdHoareTripleChecker+Valid, 2473 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:48:00,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9676 Valid, 2473 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:48:00,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38586 states. [2021-12-21 14:48:03,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38586 to 38584. [2021-12-21 14:48:03,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.4155046394691826) internal successors, (54613), 38583 states have internal predecessors, (54613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54613 transitions. [2021-12-21 14:48:03,199 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54613 transitions. Word has length 108 [2021-12-21 14:48:03,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:48:03,200 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54613 transitions. [2021-12-21 14:48:03,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54613 transitions. [2021-12-21 14:48:03,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 14:48:03,201 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:48:03,201 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] [2021-12-21 14:48:03,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 14:48:03,201 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:48:03,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:48:03,202 INFO L85 PathProgramCache]: Analyzing trace with hash 979135041, now seen corresponding path program 1 times [2021-12-21 14:48:03,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:48:03,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522331075] [2021-12-21 14:48:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:48:03,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:48:03,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:48:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:48:03,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:48:03,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522331075] [2021-12-21 14:48:03,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522331075] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:48:03,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:48:03,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:48:03,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446853005] [2021-12-21 14:48:03,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:48:03,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 14:48:03,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:48:03,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 14:48:03,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 14:48:03,304 INFO L87 Difference]: Start difference. First operand 38584 states and 54613 transitions. Second operand has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:05,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:48:05,289 INFO L93 Difference]: Finished difference Result 65082 states and 93782 transitions. [2021-12-21 14:48:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 14:48:05,289 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-21 14:48:05,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:48:05,340 INFO L225 Difference]: With dead ends: 65082 [2021-12-21 14:48:05,341 INFO L226 Difference]: Without dead ends: 38584 [2021-12-21 14:48:05,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-21 14:48:05,368 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 4752 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4752 SdHoareTripleChecker+Valid, 3123 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 14:48:05,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4752 Valid, 3123 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 14:48:05,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38584 states. [2021-12-21 14:48:07,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38584 to 38584. [2021-12-21 14:48:07,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38584 states, 38582 states have (on average 1.4088694209735109) internal successors, (54357), 38583 states have internal predecessors, (54357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38584 states to 38584 states and 54357 transitions. [2021-12-21 14:48:07,909 INFO L78 Accepts]: Start accepts. Automaton has 38584 states and 54357 transitions. Word has length 109 [2021-12-21 14:48:07,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:48:07,910 INFO L470 AbstractCegarLoop]: Abstraction has 38584 states and 54357 transitions. [2021-12-21 14:48:07,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.166666666666668) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:07,910 INFO L276 IsEmpty]: Start isEmpty. Operand 38584 states and 54357 transitions. [2021-12-21 14:48:07,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 14:48:07,916 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:48:07,923 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] [2021-12-21 14:48:07,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 14:48:07,924 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:48:07,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:48:07,924 INFO L85 PathProgramCache]: Analyzing trace with hash 278070463, now seen corresponding path program 1 times [2021-12-21 14:48:07,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:48:07,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906517464] [2021-12-21 14:48:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:48:07,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:48:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:48:08,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:48:08,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:48:08,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906517464] [2021-12-21 14:48:08,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906517464] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:48:08,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:48:08,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 14:48:08,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317256372] [2021-12-21 14:48:08,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:48:08,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-21 14:48:08,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:48:08,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-21 14:48:08,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-21 14:48:08,136 INFO L87 Difference]: Start difference. First operand 38584 states and 54357 transitions. Second operand has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:11,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:48:11,666 INFO L93 Difference]: Finished difference Result 58210 states and 82826 transitions. [2021-12-21 14:48:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 14:48:11,667 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 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 109 [2021-12-21 14:48:11,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:48:11,744 INFO L225 Difference]: With dead ends: 58210 [2021-12-21 14:48:11,744 INFO L226 Difference]: Without dead ends: 58208 [2021-12-21 14:48:11,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-21 14:48:11,759 INFO L933 BasicCegarLoop]: 1688 mSDtfsCounter, 339 mSDsluCounter, 4889 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 6577 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:48:11,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 6577 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:48:11,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58208 states. [2021-12-21 14:48:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58208 to 39352. [2021-12-21 14:48:14,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39352 states, 39350 states have (on average 1.3976365946632783) internal successors, (54997), 39351 states have internal predecessors, (54997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:14,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39352 states to 39352 states and 54997 transitions. [2021-12-21 14:48:14,498 INFO L78 Accepts]: Start accepts. Automaton has 39352 states and 54997 transitions. Word has length 109 [2021-12-21 14:48:14,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:48:14,498 INFO L470 AbstractCegarLoop]: Abstraction has 39352 states and 54997 transitions. [2021-12-21 14:48:14,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.8) internal successors, (109), 5 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:14,499 INFO L276 IsEmpty]: Start isEmpty. Operand 39352 states and 54997 transitions. [2021-12-21 14:48:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 14:48:14,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:48:14,500 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] [2021-12-21 14:48:14,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 14:48:14,500 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:48:14,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:48:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 171324818, now seen corresponding path program 1 times [2021-12-21 14:48:14,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:48:14,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780962422] [2021-12-21 14:48:14,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:48:14,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:48:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:48:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:48:14,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:48:14,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780962422] [2021-12-21 14:48:14,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780962422] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:48:14,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:48:14,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 14:48:14,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945776973] [2021-12-21 14:48:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:48:14,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:48:14,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:48:14,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:48:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:48:14,557 INFO L87 Difference]: Start difference. First operand 39352 states and 54997 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 14:48:17,934 INFO L93 Difference]: Finished difference Result 67007 states and 95451 transitions. [2021-12-21 14:48:17,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 14:48:17,935 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2021-12-21 14:48:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 14:48:18,009 INFO L225 Difference]: With dead ends: 67007 [2021-12-21 14:48:18,009 INFO L226 Difference]: Without dead ends: 52156 [2021-12-21 14:48:18,025 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 [2021-12-21 14:48:18,026 INFO L933 BasicCegarLoop]: 1731 mSDtfsCounter, 1549 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1549 SdHoareTripleChecker+Valid, 1852 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 14:48:18,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1549 Valid, 1852 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 14:48:18,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52156 states. [2021-12-21 14:48:21,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52156 to 52154. [2021-12-21 14:48:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52154 states, 52152 states have (on average 1.4055645037582452) internal successors, (73303), 52153 states have internal predecessors, (73303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52154 states to 52154 states and 73303 transitions. [2021-12-21 14:48:21,965 INFO L78 Accepts]: Start accepts. Automaton has 52154 states and 73303 transitions. Word has length 110 [2021-12-21 14:48:21,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 14:48:21,965 INFO L470 AbstractCegarLoop]: Abstraction has 52154 states and 73303 transitions. [2021-12-21 14:48:21,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 14:48:21,965 INFO L276 IsEmpty]: Start isEmpty. Operand 52154 states and 73303 transitions. [2021-12-21 14:48:21,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-21 14:48:21,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 14:48:21,967 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] [2021-12-21 14:48:21,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 14:48:21,967 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 14:48:21,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 14:48:21,967 INFO L85 PathProgramCache]: Analyzing trace with hash -502556093, now seen corresponding path program 1 times [2021-12-21 14:48:21,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 14:48:21,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672580100] [2021-12-21 14:48:21,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 14:48:21,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 14:48:21,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 14:48:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 14:48:22,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 14:48:22,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672580100] [2021-12-21 14:48:22,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672580100] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 14:48:22,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 14:48:22,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 14:48:22,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001924005] [2021-12-21 14:48:22,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 14:48:22,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 14:48:22,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 14:48:22,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 14:48:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 14:48:22,020 INFO L87 Difference]: Start difference. First operand 52154 states and 73303 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)