./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/systemc/token_ring.03.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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/systemc/token_ring.03.cil-1.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 e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-21 05:14:23,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-21 05:14:23,109 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-21 05:14:23,149 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-21 05:14:23,150 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-21 05:14:23,151 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-21 05:14:23,155 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-21 05:14:23,158 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-21 05:14:23,160 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-21 05:14:23,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-21 05:14:23,176 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-21 05:14:23,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-21 05:14:23,181 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-21 05:14:23,183 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-21 05:14:23,184 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-21 05:14:23,187 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-21 05:14:23,188 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-21 05:14:23,189 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-21 05:14:23,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-21 05:14:23,196 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-21 05:14:23,198 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-21 05:14:23,199 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-21 05:14:23,200 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-21 05:14:23,201 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-21 05:14:23,202 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-21 05:14:23,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-21 05:14:23,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-21 05:14:23,210 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-21 05:14:23,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-21 05:14:23,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-21 05:14:23,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-21 05:14:23,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-21 05:14:23,214 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-21 05:14:23,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-21 05:14:23,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-21 05:14:23,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-21 05:14:23,217 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-21 05:14:23,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-21 05:14:23,217 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-21 05:14:23,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-21 05:14:23,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-21 05:14:23,220 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-21 05:14:23,226 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-21 05:14:23,258 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-21 05:14:23,259 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-21 05:14:23,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-21 05:14:23,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-21 05:14:23,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-21 05:14:23,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-21 05:14:23,261 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-21 05:14:23,261 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-21 05:14:23,262 INFO L138 SettingsManager]: * Use SBE=true [2022-07-21 05:14:23,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-21 05:14:23,263 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-21 05:14:23,263 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-21 05:14:23,263 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-21 05:14:23,263 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-21 05:14:23,264 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-21 05:14:23,264 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-21 05:14:23,264 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-21 05:14:23,264 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-21 05:14:23,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-21 05:14:23,265 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-21 05:14:23,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-21 05:14:23,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-21 05:14:23,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-21 05:14:23,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-21 05:14:23,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:14:23,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-21 05:14:23,267 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-21 05:14:23,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-21 05:14:23,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-21 05:14:23,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-21 05:14:23,268 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-21 05:14:23,268 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-21 05:14:23,268 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-21 05:14:23,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e96a4dadf08c19b3d92d901d7f9116f0323f4fb1660ac2537112df0afe321751 [2022-07-21 05:14:23,594 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-21 05:14:23,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-21 05:14:23,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-21 05:14:23,626 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-21 05:14:23,627 INFO L275 PluginConnector]: CDTParser initialized [2022-07-21 05:14:23,629 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2022-07-21 05:14:23,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/177879e34/8a80474a5577474695b2120d60667b7f/FLAGa328c45b9 [2022-07-21 05:14:24,144 INFO L306 CDTParser]: Found 1 translation units. [2022-07-21 05:14:24,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/systemc/token_ring.03.cil-1.c [2022-07-21 05:14:24,163 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/177879e34/8a80474a5577474695b2120d60667b7f/FLAGa328c45b9 [2022-07-21 05:14:24,182 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/177879e34/8a80474a5577474695b2120d60667b7f [2022-07-21 05:14:24,185 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-21 05:14:24,186 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-21 05:14:24,188 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-21 05:14:24,188 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-21 05:14:24,191 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-21 05:14:24,192 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,193 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa406ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24, skipping insertion in model container [2022-07-21 05:14:24,193 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,200 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-21 05:14:24,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-21 05:14:24,390 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/systemc/token_ring.03.cil-1.c[671,684] [2022-07-21 05:14:24,505 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:14:24,518 INFO L203 MainTranslator]: Completed pre-run [2022-07-21 05:14:24,532 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/systemc/token_ring.03.cil-1.c[671,684] [2022-07-21 05:14:24,581 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-21 05:14:24,604 INFO L208 MainTranslator]: Completed translation [2022-07-21 05:14:24,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24 WrapperNode [2022-07-21 05:14:24,605 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-21 05:14:24,607 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-21 05:14:24,607 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-21 05:14:24,607 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-21 05:14:24,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,637 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,674 INFO L137 Inliner]: procedures = 34, calls = 41, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 336 [2022-07-21 05:14:24,675 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-21 05:14:24,676 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-21 05:14:24,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-21 05:14:24,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-21 05:14:24,684 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,714 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,729 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-21 05:14:24,730 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-21 05:14:24,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-21 05:14:24,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-21 05:14:24,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (1/1) ... [2022-07-21 05:14:24,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-21 05:14:24,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:24,765 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) [2022-07-21 05:14:24,785 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 [2022-07-21 05:14:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-21 05:14:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-07-21 05:14:24,810 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-07-21 05:14:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-07-21 05:14:24,810 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-07-21 05:14:24,810 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-07-21 05:14:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-07-21 05:14:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-07-21 05:14:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-07-21 05:14:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-07-21 05:14:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-07-21 05:14:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-07-21 05:14:24,811 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-07-21 05:14:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-21 05:14:24,811 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-07-21 05:14:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-07-21 05:14:24,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-21 05:14:24,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-21 05:14:24,933 INFO L234 CfgBuilder]: Building ICFG [2022-07-21 05:14:24,934 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-21 05:14:25,311 INFO L275 CfgBuilder]: Performing block encoding [2022-07-21 05:14:25,321 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-21 05:14:25,322 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-21 05:14:25,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:14:25 BoogieIcfgContainer [2022-07-21 05:14:25,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-21 05:14:25,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-21 05:14:25,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-21 05:14:25,329 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-21 05:14:25,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:14:24" (1/3) ... [2022-07-21 05:14:25,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:14:25, skipping insertion in model container [2022-07-21 05:14:25,330 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:14:24" (2/3) ... [2022-07-21 05:14:25,330 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a644c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:14:25, skipping insertion in model container [2022-07-21 05:14:25,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:14:25" (3/3) ... [2022-07-21 05:14:25,332 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.03.cil-1.c [2022-07-21 05:14:25,344 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-21 05:14:25,345 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-21 05:14:25,400 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-21 05:14:25,407 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2c4b0565, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@ad3fd6a [2022-07-21 05:14:25,408 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-21 05:14:25,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 165 states, 137 states have (on average 1.6058394160583942) internal successors, (220), 141 states have internal predecessors, (220), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-21 05:14:25,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:25,431 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:25,432 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:25,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1698734467, now seen corresponding path program 1 times [2022-07-21 05:14:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:25,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107217991] [2022-07-21 05:14:25,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:25,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:25,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:25,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:25,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:25,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107217991] [2022-07-21 05:14:25,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107217991] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:25,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:25,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-21 05:14:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241760466] [2022-07-21 05:14:25,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:25,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-21 05:14:25,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:25,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-21 05:14:25,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-21 05:14:25,733 INFO L87 Difference]: Start difference. First operand has 165 states, 137 states have (on average 1.6058394160583942) internal successors, (220), 141 states have internal predecessors, (220), 19 states have call successors, (19), 7 states have call predecessors, (19), 7 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) Second operand has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:26,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:26,376 INFO L93 Difference]: Finished difference Result 363 states and 577 transitions. [2022-07-21 05:14:26,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-21 05:14:26,379 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:26,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:26,389 INFO L225 Difference]: With dead ends: 363 [2022-07-21 05:14:26,390 INFO L226 Difference]: Without dead ends: 202 [2022-07-21 05:14:26,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:26,396 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 371 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:26,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [386 Valid, 439 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-21 05:14:26,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-21 05:14:26,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 159. [2022-07-21 05:14:26,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 133 states have (on average 1.5112781954887218) internal successors, (201), 135 states have internal predecessors, (201), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-21 05:14:26,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 237 transitions. [2022-07-21 05:14:26,460 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 237 transitions. Word has length 79 [2022-07-21 05:14:26,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:26,460 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 237 transitions. [2022-07-21 05:14:26,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.6) internal successors, (68), 3 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:26,461 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 237 transitions. [2022-07-21 05:14:26,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:26,464 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:26,464 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:26,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-21 05:14:26,464 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:26,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -209723323, now seen corresponding path program 1 times [2022-07-21 05:14:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:26,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099273801] [2022-07-21 05:14:26,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:26,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:26,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:26,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:26,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:26,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:26,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:26,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:26,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:26,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:26,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099273801] [2022-07-21 05:14:26,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099273801] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:26,708 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:26,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:14:26,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935877800] [2022-07-21 05:14:26,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:14:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:14:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:14:26,710 INFO L87 Difference]: Start difference. First operand 159 states and 237 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:27,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:27,557 INFO L93 Difference]: Finished difference Result 541 states and 828 transitions. [2022-07-21 05:14:27,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:14:27,557 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:27,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:27,562 INFO L225 Difference]: With dead ends: 541 [2022-07-21 05:14:27,562 INFO L226 Difference]: Without dead ends: 393 [2022-07-21 05:14:27,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:14:27,565 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 537 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:27,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 683 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 05:14:27,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-07-21 05:14:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 306. [2022-07-21 05:14:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 261 states have (on average 1.524904214559387) internal successors, (398), 264 states have internal predecessors, (398), 31 states have call successors, (31), 13 states have call predecessors, (31), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2022-07-21 05:14:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 461 transitions. [2022-07-21 05:14:27,599 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 461 transitions. Word has length 79 [2022-07-21 05:14:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:27,600 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 461 transitions. [2022-07-21 05:14:27,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 461 transitions. [2022-07-21 05:14:27,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:27,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:27,602 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:27,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-21 05:14:27,603 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:27,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:27,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1451163839, now seen corresponding path program 1 times [2022-07-21 05:14:27,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:27,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100897162] [2022-07-21 05:14:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:27,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:27,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:27,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:27,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:27,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100897162] [2022-07-21 05:14:27,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100897162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:27,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:27,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:27,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51515134] [2022-07-21 05:14:27,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:27,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:27,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:27,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:27,715 INFO L87 Difference]: Start difference. First operand 306 states and 461 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:28,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:28,690 INFO L93 Difference]: Finished difference Result 881 states and 1347 transitions. [2022-07-21 05:14:28,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:14:28,690 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:28,694 INFO L225 Difference]: With dead ends: 881 [2022-07-21 05:14:28,694 INFO L226 Difference]: Without dead ends: 586 [2022-07-21 05:14:28,696 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 05:14:28,698 INFO L413 NwaCegarLoop]: 379 mSDtfsCounter, 532 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1182 SdHoareTripleChecker+Invalid, 1169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:28,698 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1182 Invalid, 1169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 05:14:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2022-07-21 05:14:28,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 445. [2022-07-21 05:14:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 381 states have (on average 1.5196850393700787) internal successors, (579), 385 states have internal predecessors, (579), 43 states have call successors, (43), 19 states have call predecessors, (43), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2022-07-21 05:14:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 668 transitions. [2022-07-21 05:14:28,738 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 668 transitions. Word has length 79 [2022-07-21 05:14:28,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:28,738 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 668 transitions. [2022-07-21 05:14:28,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 668 transitions. [2022-07-21 05:14:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:28,740 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:28,740 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:28,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-21 05:14:28,741 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:28,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1505556737, now seen corresponding path program 1 times [2022-07-21 05:14:28,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984156401] [2022-07-21 05:14:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:28,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:28,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:28,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:28,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:28,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984156401] [2022-07-21 05:14:28,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984156401] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:28,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:28,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991776282] [2022-07-21 05:14:28,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:28,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:28,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:28,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:28,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:28,888 INFO L87 Difference]: Start difference. First operand 445 states and 668 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:29,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:29,834 INFO L93 Difference]: Finished difference Result 1379 states and 2102 transitions. [2022-07-21 05:14:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-21 05:14:29,835 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:29,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:29,842 INFO L225 Difference]: With dead ends: 1379 [2022-07-21 05:14:29,843 INFO L226 Difference]: Without dead ends: 945 [2022-07-21 05:14:29,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2022-07-21 05:14:29,856 INFO L413 NwaCegarLoop]: 372 mSDtfsCounter, 528 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1175 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:29,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [538 Valid, 1175 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 05:14:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2022-07-21 05:14:29,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 726. [2022-07-21 05:14:29,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 624 states have (on average 1.516025641025641) internal successors, (946), 630 states have internal predecessors, (946), 67 states have call successors, (67), 31 states have call predecessors, (67), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2022-07-21 05:14:29,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 1091 transitions. [2022-07-21 05:14:29,930 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 1091 transitions. Word has length 79 [2022-07-21 05:14:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:29,931 INFO L495 AbstractCegarLoop]: Abstraction has 726 states and 1091 transitions. [2022-07-21 05:14:29,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 1091 transitions. [2022-07-21 05:14:29,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:29,934 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:29,934 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:29,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-21 05:14:29,934 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:29,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:29,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1922953343, now seen corresponding path program 1 times [2022-07-21 05:14:29,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:29,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184789058] [2022-07-21 05:14:29,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:29,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:29,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:29,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:29,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:30,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:30,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:30,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:30,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:30,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:30,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:30,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:30,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184789058] [2022-07-21 05:14:30,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184789058] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:30,020 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:30,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:30,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502045543] [2022-07-21 05:14:30,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:30,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:30,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:30,022 INFO L87 Difference]: Start difference. First operand 726 states and 1091 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:31,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:31,098 INFO L93 Difference]: Finished difference Result 2554 states and 3875 transitions. [2022-07-21 05:14:31,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:14:31,098 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:31,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:31,108 INFO L225 Difference]: With dead ends: 2554 [2022-07-21 05:14:31,109 INFO L226 Difference]: Without dead ends: 1839 [2022-07-21 05:14:31,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:14:31,112 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 662 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1065 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 676 SdHoareTripleChecker+Valid, 1160 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:31,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [676 Valid, 1160 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1065 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 05:14:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2022-07-21 05:14:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 1279. [2022-07-21 05:14:31,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1279 states, 1105 states have (on average 1.5167420814479637) internal successors, (1676), 1115 states have internal predecessors, (1676), 111 states have call successors, (111), 55 states have call predecessors, (111), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2022-07-21 05:14:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1279 states to 1279 states and 1931 transitions. [2022-07-21 05:14:31,218 INFO L78 Accepts]: Start accepts. Automaton has 1279 states and 1931 transitions. Word has length 79 [2022-07-21 05:14:31,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:31,218 INFO L495 AbstractCegarLoop]: Abstraction has 1279 states and 1931 transitions. [2022-07-21 05:14:31,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:31,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1279 states and 1931 transitions. [2022-07-21 05:14:31,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:31,221 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:31,221 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:31,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-21 05:14:31,221 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:31,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:31,222 INFO L85 PathProgramCache]: Analyzing trace with hash -1243681089, now seen corresponding path program 1 times [2022-07-21 05:14:31,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:31,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551418236] [2022-07-21 05:14:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:31,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:31,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:31,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551418236] [2022-07-21 05:14:31,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551418236] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:31,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:31,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:31,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998839845] [2022-07-21 05:14:31,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:31,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:31,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:31,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:31,300 INFO L87 Difference]: Start difference. First operand 1279 states and 1931 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:32,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:32,418 INFO L93 Difference]: Finished difference Result 4569 states and 6941 transitions. [2022-07-21 05:14:32,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:14:32,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:32,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:32,436 INFO L225 Difference]: With dead ends: 4569 [2022-07-21 05:14:32,437 INFO L226 Difference]: Without dead ends: 3301 [2022-07-21 05:14:32,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:14:32,443 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 548 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1195 SdHoareTripleChecker+Invalid, 1272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:32,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1195 Invalid, 1272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-21 05:14:32,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3301 states. [2022-07-21 05:14:32,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3301 to 2300. [2022-07-21 05:14:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1986 states have (on average 1.5075528700906344) internal successors, (2994), 2004 states have internal predecessors, (2994), 195 states have call successors, (195), 103 states have call predecessors, (195), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2022-07-21 05:14:32,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3479 transitions. [2022-07-21 05:14:32,582 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3479 transitions. Word has length 79 [2022-07-21 05:14:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:32,583 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 3479 transitions. [2022-07-21 05:14:32,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3479 transitions. [2022-07-21 05:14:32,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:32,587 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:32,587 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:32,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-21 05:14:32,588 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:32,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:32,589 INFO L85 PathProgramCache]: Analyzing trace with hash 717893569, now seen corresponding path program 1 times [2022-07-21 05:14:32,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:32,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71242684] [2022-07-21 05:14:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:32,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:32,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:32,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:32,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:32,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:32,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:32,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71242684] [2022-07-21 05:14:32,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71242684] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:32,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:32,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:32,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494988456] [2022-07-21 05:14:32,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:32,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:32,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:32,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:32,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:32,677 INFO L87 Difference]: Start difference. First operand 2300 states and 3479 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:33,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:33,258 INFO L93 Difference]: Finished difference Result 5172 states and 7918 transitions. [2022-07-21 05:14:33,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-21 05:14:33,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:33,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:33,296 INFO L225 Difference]: With dead ends: 5172 [2022-07-21 05:14:33,297 INFO L226 Difference]: Without dead ends: 2883 [2022-07-21 05:14:33,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-07-21 05:14:33,305 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 402 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:33,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 601 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-21 05:14:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2883 states. [2022-07-21 05:14:33,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2883 to 2300. [2022-07-21 05:14:33,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 1986 states have (on average 1.498992950654582) internal successors, (2977), 2004 states have internal predecessors, (2977), 195 states have call successors, (195), 103 states have call predecessors, (195), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2022-07-21 05:14:33,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 3462 transitions. [2022-07-21 05:14:33,440 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 3462 transitions. Word has length 79 [2022-07-21 05:14:33,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:33,440 INFO L495 AbstractCegarLoop]: Abstraction has 2300 states and 3462 transitions. [2022-07-21 05:14:33,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:33,441 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 3462 transitions. [2022-07-21 05:14:33,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:33,444 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:33,444 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:33,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-21 05:14:33,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:33,445 INFO L85 PathProgramCache]: Analyzing trace with hash 919717503, now seen corresponding path program 1 times [2022-07-21 05:14:33,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:33,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097464347] [2022-07-21 05:14:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:33,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:33,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:33,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:33,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:33,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097464347] [2022-07-21 05:14:33,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097464347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:33,530 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:33,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-21 05:14:33,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027993118] [2022-07-21 05:14:33,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:33,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-21 05:14:33,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:33,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-21 05:14:33,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-21 05:14:33,532 INFO L87 Difference]: Start difference. First operand 2300 states and 3462 transitions. Second operand has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:34,642 INFO L93 Difference]: Finished difference Result 7970 states and 12031 transitions. [2022-07-21 05:14:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-21 05:14:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:34,667 INFO L225 Difference]: With dead ends: 7970 [2022-07-21 05:14:34,667 INFO L226 Difference]: Without dead ends: 5681 [2022-07-21 05:14:34,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-07-21 05:14:34,675 INFO L413 NwaCegarLoop]: 350 mSDtfsCounter, 536 mSDsluCounter, 795 mSDsCounter, 0 mSdLazyCounter, 1027 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:34,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1145 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1027 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 05:14:34,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5681 states. [2022-07-21 05:14:34,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5681 to 4430. [2022-07-21 05:14:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4430 states, 3844 states have (on average 1.4997398543184184) internal successors, (5765), 3878 states have internal predecessors, (5765), 355 states have call successors, (355), 199 states have call predecessors, (355), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2022-07-21 05:14:34,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4430 states to 4430 states and 6748 transitions. [2022-07-21 05:14:34,976 INFO L78 Accepts]: Start accepts. Automaton has 4430 states and 6748 transitions. Word has length 79 [2022-07-21 05:14:34,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:34,977 INFO L495 AbstractCegarLoop]: Abstraction has 4430 states and 6748 transitions. [2022-07-21 05:14:34,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.714285714285714) internal successors, (68), 5 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:34,977 INFO L276 IsEmpty]: Start isEmpty. Operand 4430 states and 6748 transitions. [2022-07-21 05:14:34,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-21 05:14:34,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:34,982 INFO L195 NwaCegarLoop]: 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] [2022-07-21 05:14:34,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-21 05:14:34,982 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:34,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:34,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1480417281, now seen corresponding path program 1 times [2022-07-21 05:14:34,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:34,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090795749] [2022-07-21 05:14:34,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:34,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:35,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:35,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:35,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:35,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-21 05:14:35,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:35,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090795749] [2022-07-21 05:14:35,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090795749] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:35,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-21 05:14:35,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-21 05:14:35,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803488076] [2022-07-21 05:14:35,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:35,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-21 05:14:35,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:35,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-21 05:14:35,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-21 05:14:35,076 INFO L87 Difference]: Start difference. First operand 4430 states and 6748 transitions. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:36,159 INFO L93 Difference]: Finished difference Result 12534 states and 19060 transitions. [2022-07-21 05:14:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-21 05:14:36,160 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2022-07-21 05:14:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:36,210 INFO L225 Difference]: With dead ends: 12534 [2022-07-21 05:14:36,211 INFO L226 Difference]: Without dead ends: 8116 [2022-07-21 05:14:36,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-07-21 05:14:36,230 INFO L413 NwaCegarLoop]: 437 mSDtfsCounter, 684 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 823 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 712 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:36,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [712 Valid, 916 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 823 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-21 05:14:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8116 states. [2022-07-21 05:14:36,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8116 to 6625. [2022-07-21 05:14:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6625 states, 5732 states have (on average 1.482205163991626) internal successors, (8496), 5799 states have internal predecessors, (8496), 544 states have call successors, (544), 301 states have call predecessors, (544), 348 states have return successors, (899), 556 states have call predecessors, (899), 542 states have call successors, (899) [2022-07-21 05:14:36,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6625 states to 6625 states and 9939 transitions. [2022-07-21 05:14:36,651 INFO L78 Accepts]: Start accepts. Automaton has 6625 states and 9939 transitions. Word has length 79 [2022-07-21 05:14:36,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:36,652 INFO L495 AbstractCegarLoop]: Abstraction has 6625 states and 9939 transitions. [2022-07-21 05:14:36,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 4 states have internal predecessors, (68), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-07-21 05:14:36,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6625 states and 9939 transitions. [2022-07-21 05:14:36,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 05:14:36,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:36,673 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:36,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-21 05:14:36,674 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:36,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:36,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1253867763, now seen corresponding path program 1 times [2022-07-21 05:14:36,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:36,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882618333] [2022-07-21 05:14:36,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:36,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:36,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:36,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:36,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:36,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:14:36,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 05:14:36,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,800 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:14:36,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882618333] [2022-07-21 05:14:36,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882618333] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:36,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497693690] [2022-07-21 05:14:36,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:36,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:36,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:36,803 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:36,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-21 05:14:36,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:36,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:14:36,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:37,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-21 05:14:37,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:14:37,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497693690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:37,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:14:37,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 05:14:37,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787013906] [2022-07-21 05:14:37,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:37,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:14:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:37,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:14:37,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:37,088 INFO L87 Difference]: Start difference. First operand 6625 states and 9939 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:14:37,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:37,684 INFO L93 Difference]: Finished difference Result 19672 states and 29707 transitions. [2022-07-21 05:14:37,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:14:37,685 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), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-07-21 05:14:37,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:37,753 INFO L225 Difference]: With dead ends: 19672 [2022-07-21 05:14:37,753 INFO L226 Difference]: Without dead ends: 13059 [2022-07-21 05:14:37,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:37,782 INFO L413 NwaCegarLoop]: 280 mSDtfsCounter, 189 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:37,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 489 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:14:37,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13059 states. [2022-07-21 05:14:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13059 to 12955. [2022-07-21 05:14:38,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12955 states, 11202 states have (on average 1.4798250312444206) internal successors, (16577), 11334 states have internal predecessors, (16577), 1056 states have call successors, (1056), 601 states have call predecessors, (1056), 696 states have return successors, (1737), 1051 states have call predecessors, (1737), 1054 states have call successors, (1737) [2022-07-21 05:14:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12955 states to 12955 states and 19370 transitions. [2022-07-21 05:14:38,587 INFO L78 Accepts]: Start accepts. Automaton has 12955 states and 19370 transitions. Word has length 128 [2022-07-21 05:14:38,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:38,589 INFO L495 AbstractCegarLoop]: Abstraction has 12955 states and 19370 transitions. [2022-07-21 05:14:38,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:14:38,590 INFO L276 IsEmpty]: Start isEmpty. Operand 12955 states and 19370 transitions. [2022-07-21 05:14:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 05:14:38,624 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:38,625 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:38,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:38,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-21 05:14:38,851 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:38,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:38,852 INFO L85 PathProgramCache]: Analyzing trace with hash 115435565, now seen corresponding path program 1 times [2022-07-21 05:14:38,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:38,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285671831] [2022-07-21 05:14:38,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:38,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:38,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:38,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:38,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:14:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 05:14:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:38,958 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:14:38,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:38,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285671831] [2022-07-21 05:14:38,958 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285671831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:38,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032636362] [2022-07-21 05:14:38,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:38,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:38,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:38,961 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:38,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-21 05:14:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:39,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:14:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-21 05:14:39,157 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:14:39,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032636362] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:39,158 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:14:39,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 05:14:39,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583854612] [2022-07-21 05:14:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:39,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:14:39,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:14:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:39,160 INFO L87 Difference]: Start difference. First operand 12955 states and 19370 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:14:40,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:40,160 INFO L93 Difference]: Finished difference Result 38484 states and 57932 transitions. [2022-07-21 05:14:40,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:14:40,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2022-07-21 05:14:40,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:40,252 INFO L225 Difference]: With dead ends: 38484 [2022-07-21 05:14:40,253 INFO L226 Difference]: Without dead ends: 25541 [2022-07-21 05:14:40,291 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:40,293 INFO L413 NwaCegarLoop]: 244 mSDtfsCounter, 183 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:40,293 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 453 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:14:40,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25541 states. [2022-07-21 05:14:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25541 to 25337. [2022-07-21 05:14:41,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25337 states, 21890 states have (on average 1.4772498857925993) internal successors, (32337), 22152 states have internal predecessors, (32337), 2054 states have call successors, (2054), 1201 states have call predecessors, (2054), 1392 states have return successors, (3387), 2015 states have call predecessors, (3387), 2052 states have call successors, (3387) [2022-07-21 05:14:41,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25337 states to 25337 states and 37778 transitions. [2022-07-21 05:14:41,493 INFO L78 Accepts]: Start accepts. Automaton has 25337 states and 37778 transitions. Word has length 128 [2022-07-21 05:14:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:41,493 INFO L495 AbstractCegarLoop]: Abstraction has 25337 states and 37778 transitions. [2022-07-21 05:14:41,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-21 05:14:41,494 INFO L276 IsEmpty]: Start isEmpty. Operand 25337 states and 37778 transitions. [2022-07-21 05:14:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-07-21 05:14:41,545 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:41,546 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:41,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:41,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-21 05:14:41,766 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:41,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:41,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1158895283, now seen corresponding path program 1 times [2022-07-21 05:14:41,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:41,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274703666] [2022-07-21 05:14:41,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:41,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:41,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:41,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:41,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:14:41,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:41,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-07-21 05:14:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-21 05:14:41,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274703666] [2022-07-21 05:14:41,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274703666] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:41,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419099465] [2022-07-21 05:14:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:41,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:41,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:41,887 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:41,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-21 05:14:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:41,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:14:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:14:42,009 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:14:42,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419099465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:42,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:14:42,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 05:14:42,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648433420] [2022-07-21 05:14:42,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:42,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:14:42,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:42,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:14:42,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:42,012 INFO L87 Difference]: Start difference. First operand 25337 states and 37778 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 05:14:43,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:43,776 INFO L93 Difference]: Finished difference Result 74632 states and 112417 transitions. [2022-07-21 05:14:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:14:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2022-07-21 05:14:43,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:44,034 INFO L225 Difference]: With dead ends: 74632 [2022-07-21 05:14:44,037 INFO L226 Difference]: Without dead ends: 49308 [2022-07-21 05:14:44,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:44,114 INFO L413 NwaCegarLoop]: 432 mSDtfsCounter, 192 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:44,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 664 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:14:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49308 states. [2022-07-21 05:14:46,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49308 to 49308. [2022-07-21 05:14:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49308 states, 42554 states have (on average 1.4656906518776143) internal successors, (62371), 43009 states have internal predecessors, (62371), 3969 states have call successors, (3969), 2401 states have call predecessors, (3969), 2784 states have return successors, (7350), 3961 states have call predecessors, (7350), 3967 states have call successors, (7350) [2022-07-21 05:14:46,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49308 states to 49308 states and 73690 transitions. [2022-07-21 05:14:46,429 INFO L78 Accepts]: Start accepts. Automaton has 49308 states and 73690 transitions. Word has length 128 [2022-07-21 05:14:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:46,430 INFO L495 AbstractCegarLoop]: Abstraction has 49308 states and 73690 transitions. [2022-07-21 05:14:46,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-21 05:14:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 49308 states and 73690 transitions. [2022-07-21 05:14:46,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-07-21 05:14:46,602 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:46,602 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:46,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-21 05:14:46,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:46,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:46,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1361719287, now seen corresponding path program 1 times [2022-07-21 05:14:46,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:46,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982357157] [2022-07-21 05:14:46,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:46,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:46,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:46,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:46,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-21 05:14:46,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:46,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-07-21 05:14:46,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:46,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-21 05:14:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-21 05:14:46,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:46,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982357157] [2022-07-21 05:14:46,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982357157] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:46,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083851468] [2022-07-21 05:14:46,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:46,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:46,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:46,936 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:46,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-21 05:14:47,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:47,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:14:47,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:47,174 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-21 05:14:47,174 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:14:47,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083851468] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:47,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:14:47,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-21 05:14:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906272378] [2022-07-21 05:14:47,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:14:47,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:14:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:47,179 INFO L87 Difference]: Start difference. First operand 49308 states and 73690 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 05:14:50,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:14:50,850 INFO L93 Difference]: Finished difference Result 145448 states and 218817 transitions. [2022-07-21 05:14:50,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:14:50,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2022-07-21 05:14:50,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:14:51,370 INFO L225 Difference]: With dead ends: 145448 [2022-07-21 05:14:51,370 INFO L226 Difference]: Without dead ends: 96158 [2022-07-21 05:14:51,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:51,527 INFO L413 NwaCegarLoop]: 247 mSDtfsCounter, 139 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:14:51,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 456 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:14:51,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96158 states. [2022-07-21 05:14:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96158 to 95354. [2022-07-21 05:14:55,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95354 states, 82548 states have (on average 1.4655352037602365) internal successors, (120977), 83455 states have internal predecessors, (120977), 7383 states have call successors, (7383), 4655 states have call predecessors, (7383), 5422 states have return successors, (13774), 7307 states have call predecessors, (13774), 7381 states have call successors, (13774) [2022-07-21 05:14:56,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95354 states to 95354 states and 142134 transitions. [2022-07-21 05:14:56,559 INFO L78 Accepts]: Start accepts. Automaton has 95354 states and 142134 transitions. Word has length 166 [2022-07-21 05:14:56,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:14:56,560 INFO L495 AbstractCegarLoop]: Abstraction has 95354 states and 142134 transitions. [2022-07-21 05:14:56,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-07-21 05:14:56,560 INFO L276 IsEmpty]: Start isEmpty. Operand 95354 states and 142134 transitions. [2022-07-21 05:14:56,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-21 05:14:56,884 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:14:56,884 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:14:56,911 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-21 05:14:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:57,100 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:14:57,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:14:57,100 INFO L85 PathProgramCache]: Analyzing trace with hash -912610153, now seen corresponding path program 1 times [2022-07-21 05:14:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:14:57,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401325375] [2022-07-21 05:14:57,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:57,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:14:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:14:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:14:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:14:57,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:14:57,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:14:57,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 05:14:57,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 05:14:57,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-21 05:14:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:14:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-07-21 05:14:57,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,236 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-21 05:14:57,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:14:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401325375] [2022-07-21 05:14:57,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401325375] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:14:57,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779034083] [2022-07-21 05:14:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:14:57,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:14:57,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:14:57,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:14:57,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-21 05:14:57,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:14:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-21 05:14:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:14:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-21 05:14:57,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:14:57,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779034083] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:14:57,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:14:57,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 05:14:57,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127845312] [2022-07-21 05:14:57,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:14:57,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:14:57,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:14:57,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:14:57,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:14:57,465 INFO L87 Difference]: Start difference. First operand 95354 states and 142134 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 05:15:00,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:15:00,834 INFO L93 Difference]: Finished difference Result 147176 states and 219935 transitions. [2022-07-21 05:15:00,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:15:00,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2022-07-21 05:15:00,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:15:01,421 INFO L225 Difference]: With dead ends: 147176 [2022-07-21 05:15:01,422 INFO L226 Difference]: Without dead ends: 81322 [2022-07-21 05:15:01,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:15:01,546 INFO L413 NwaCegarLoop]: 230 mSDtfsCounter, 160 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:15:01,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 274 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:15:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81322 states. [2022-07-21 05:15:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81322 to 57978. [2022-07-21 05:15:04,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57978 states, 50388 states have (on average 1.413927919345876) internal successors, (71245), 50851 states have internal predecessors, (71245), 4299 states have call successors, (4299), 2907 states have call predecessors, (4299), 3290 states have return successors, (6802), 4251 states have call predecessors, (6802), 4297 states have call successors, (6802) [2022-07-21 05:15:04,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57978 states to 57978 states and 82346 transitions. [2022-07-21 05:15:04,819 INFO L78 Accepts]: Start accepts. Automaton has 57978 states and 82346 transitions. Word has length 184 [2022-07-21 05:15:04,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:15:04,819 INFO L495 AbstractCegarLoop]: Abstraction has 57978 states and 82346 transitions. [2022-07-21 05:15:04,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 3 states have internal predecessors, (150), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 05:15:04,819 INFO L276 IsEmpty]: Start isEmpty. Operand 57978 states and 82346 transitions. [2022-07-21 05:15:04,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-21 05:15:04,924 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:15:04,924 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:15:04,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-21 05:15:05,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-21 05:15:05,140 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:15:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:15:05,140 INFO L85 PathProgramCache]: Analyzing trace with hash -427827400, now seen corresponding path program 1 times [2022-07-21 05:15:05,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:15:05,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873532397] [2022-07-21 05:15:05,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:15:05,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:15:05,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:15:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:15:05,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:15:05,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:15:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:15:05,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 05:15:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 05:15:05,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:15:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-21 05:15:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:15:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-07-21 05:15:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 05:15:05,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:15:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873532397] [2022-07-21 05:15:05,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873532397] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:15:05,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625560823] [2022-07-21 05:15:05,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:15:05,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:15:05,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:15:05,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:15:05,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-21 05:15:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:05,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 05:15:05,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:15:05,464 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 96 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-07-21 05:15:05,465 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:15:05,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625560823] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:15:05,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:15:05,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 05:15:05,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105266297] [2022-07-21 05:15:05,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:15:05,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:15:05,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:15:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:15:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:15:05,467 INFO L87 Difference]: Start difference. First operand 57978 states and 82346 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 05:15:08,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:15:08,912 INFO L93 Difference]: Finished difference Result 122570 states and 176133 transitions. [2022-07-21 05:15:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:15:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2022-07-21 05:15:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:15:09,181 INFO L225 Difference]: With dead ends: 122570 [2022-07-21 05:15:09,182 INFO L226 Difference]: Without dead ends: 64612 [2022-07-21 05:15:09,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:15:09,316 INFO L413 NwaCegarLoop]: 233 mSDtfsCounter, 182 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:15:09,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 276 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:15:09,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64612 states. [2022-07-21 05:15:12,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64612 to 64440. [2022-07-21 05:15:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64440 states, 56406 states have (on average 1.3803318795872779) internal successors, (77859), 56869 states have internal predecessors, (77859), 4413 states have call successors, (4413), 3237 states have call predecessors, (4413), 3620 states have return successors, (7230), 4365 states have call predecessors, (7230), 4411 states have call successors, (7230) [2022-07-21 05:15:12,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64440 states to 64440 states and 89502 transitions. [2022-07-21 05:15:12,898 INFO L78 Accepts]: Start accepts. Automaton has 64440 states and 89502 transitions. Word has length 184 [2022-07-21 05:15:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-21 05:15:12,898 INFO L495 AbstractCegarLoop]: Abstraction has 64440 states and 89502 transitions. [2022-07-21 05:15:12,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 3 states have internal predecessors, (143), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-07-21 05:15:12,899 INFO L276 IsEmpty]: Start isEmpty. Operand 64440 states and 89502 transitions. [2022-07-21 05:15:13,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-07-21 05:15:13,013 INFO L187 NwaCegarLoop]: Found error trace [2022-07-21 05:15:13,013 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-21 05:15:13,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-21 05:15:13,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-21 05:15:13,214 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-21 05:15:13,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-21 05:15:13,215 INFO L85 PathProgramCache]: Analyzing trace with hash -525524426, now seen corresponding path program 1 times [2022-07-21 05:15:13,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-21 05:15:13,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641084660] [2022-07-21 05:15:13,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:15:13,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-21 05:15:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-21 05:15:13,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-07-21 05:15:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-21 05:15:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-21 05:15:13,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-07-21 05:15:13,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-07-21 05:15:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-21 05:15:13,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:15:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2022-07-21 05:15:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-07-21 05:15:13,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 169 [2022-07-21 05:15:13,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,311 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-21 05:15:13,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-21 05:15:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641084660] [2022-07-21 05:15:13,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641084660] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-21 05:15:13,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471065180] [2022-07-21 05:15:13,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-21 05:15:13,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-21 05:15:13,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-21 05:15:13,313 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-21 05:15:13,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-21 05:15:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-21 05:15:13,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-21 05:15:13,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-21 05:15:13,502 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-07-21 05:15:13,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-21 05:15:13,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471065180] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-21 05:15:13,503 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-21 05:15:13,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-07-21 05:15:13,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230990896] [2022-07-21 05:15:13,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-21 05:15:13,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-21 05:15:13,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-21 05:15:13,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-21 05:15:13,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:15:13,504 INFO L87 Difference]: Start difference. First operand 64440 states and 89502 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-21 05:15:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-21 05:15:17,044 INFO L93 Difference]: Finished difference Result 112661 states and 155942 transitions. [2022-07-21 05:15:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-21 05:15:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2022-07-21 05:15:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-21 05:15:17,231 INFO L225 Difference]: With dead ends: 112661 [2022-07-21 05:15:17,231 INFO L226 Difference]: Without dead ends: 68468 [2022-07-21 05:15:17,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-21 05:15:17,303 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 158 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-21 05:15:17,303 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 466 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-21 05:15:17,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68468 states.