./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.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 00976d0f33ca0b9714575e3679f5d33e30ad2cb228857f610050b5b28bb1919c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 20:04:14,187 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 20:04:14,189 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 20:04:14,228 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 20:04:14,229 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 20:04:14,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 20:04:14,232 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 20:04:14,234 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 20:04:14,235 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 20:04:14,240 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 20:04:14,240 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 20:04:14,242 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 20:04:14,242 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 20:04:14,244 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 20:04:14,244 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 20:04:14,247 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 20:04:14,248 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 20:04:14,248 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 20:04:14,250 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 20:04:14,251 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 20:04:14,254 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 20:04:14,256 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 20:04:14,256 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 20:04:14,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 20:04:14,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 20:04:14,260 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 20:04:14,261 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 20:04:14,261 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 20:04:14,262 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 20:04:14,262 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 20:04:14,263 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 20:04:14,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 20:04:14,264 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 20:04:14,265 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 20:04:14,265 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 20:04:14,266 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 20:04:14,266 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 20:04:14,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 20:04:14,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 20:04:14,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 20:04:14,267 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 20:04:14,268 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 20:04:14,269 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 20:04:14,294 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 20:04:14,294 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 20:04:14,294 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 20:04:14,295 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 20:04:14,295 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 20:04:14,295 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 20:04:14,296 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 20:04:14,296 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 20:04:14,296 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 20:04:14,297 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 20:04:14,297 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 20:04:14,297 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 20:04:14,297 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 20:04:14,297 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 20:04:14,297 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 20:04:14,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 20:04:14,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 20:04:14,298 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 20:04:14,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 20:04:14,299 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 20:04:14,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 20:04:14,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 20:04:14,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 20:04:14,300 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 20:04:14,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:04:14,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 20:04:14,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 20:04:14,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 20:04:14,302 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 00976d0f33ca0b9714575e3679f5d33e30ad2cb228857f610050b5b28bb1919c [2022-07-19 20:04:14,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 20:04:14,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 20:04:14,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 20:04:14,511 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 20:04:14,511 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 20:04:14,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2022-07-19 20:04:14,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f877f95c/9a4adfc56dc54149a84b3a023d3c47d5/FLAGd6b8dfde4 [2022-07-19 20:04:15,095 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 20:04:15,095 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2022-07-19 20:04:15,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f877f95c/9a4adfc56dc54149a84b3a023d3c47d5/FLAGd6b8dfde4 [2022-07-19 20:04:15,600 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6f877f95c/9a4adfc56dc54149a84b3a023d3c47d5 [2022-07-19 20:04:15,602 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 20:04:15,603 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 20:04:15,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 20:04:15,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 20:04:15,609 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 20:04:15,610 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:04:15" (1/1) ... [2022-07-19 20:04:15,611 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ebc486a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:15, skipping insertion in model container [2022-07-19 20:04:15,611 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 08:04:15" (1/1) ... [2022-07-19 20:04:15,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 20:04:15,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 20:04:15,995 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[6354,6367] [2022-07-19 20:04:16,010 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[8691,8704] [2022-07-19 20:04:16,527 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:04:16,534 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 20:04:16,568 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[6354,6367] [2022-07-19 20:04:16,571 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c[8691,8704] [2022-07-19 20:04:16,873 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 20:04:16,891 INFO L208 MainTranslator]: Completed translation [2022-07-19 20:04:16,891 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16 WrapperNode [2022-07-19 20:04:16,891 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 20:04:16,892 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 20:04:16,892 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 20:04:16,892 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 20:04:16,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:16,936 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,155 INFO L137 Inliner]: procedures = 33, calls = 19, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 4976 [2022-07-19 20:04:17,155 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 20:04:17,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 20:04:17,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 20:04:17,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 20:04:17,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,370 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,555 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 20:04:17,557 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 20:04:17,557 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 20:04:17,557 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 20:04:17,559 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (1/1) ... [2022-07-19 20:04:17,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 20:04:17,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:04:17,614 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) [2022-07-19 20:04:17,707 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 [2022-07-19 20:04:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 20:04:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 20:04:17,731 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 20:04:17,731 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 20:04:17,834 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 20:04:17,836 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 20:04:20,757 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 20:04:20,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 20:04:20,769 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-19 20:04:20,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:04:20 BoogieIcfgContainer [2022-07-19 20:04:20,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 20:04:20,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 20:04:20,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 20:04:20,774 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 20:04:20,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 08:04:15" (1/3) ... [2022-07-19 20:04:20,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267dcaed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:04:20, skipping insertion in model container [2022-07-19 20:04:20,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 08:04:16" (2/3) ... [2022-07-19 20:04:20,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@267dcaed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 08:04:20, skipping insertion in model container [2022-07-19 20:04:20,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 08:04:20" (3/3) ... [2022-07-19 20:04:20,777 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.ufo.BOUNDED-6.pals+Problem12_label03.c [2022-07-19 20:04:20,786 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 20:04:20,787 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-07-19 20:04:20,829 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 20:04:20,833 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@141ba566, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57fdbd93 [2022-07-19 20:04:20,834 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-07-19 20:04:20,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 20:04:20,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:20,848 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] [2022-07-19 20:04:20,848 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:20,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:20,852 INFO L85 PathProgramCache]: Analyzing trace with hash 1700470853, now seen corresponding path program 1 times [2022-07-19 20:04:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:20,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471040141] [2022-07-19 20:04:20,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:20,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:20,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:20,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:20,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471040141] [2022-07-19 20:04:20,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471040141] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:20,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:20,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:04:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837488461] [2022-07-19 20:04:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:20,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:20,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:21,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:21,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:21,011 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:23,576 INFO L93 Difference]: Finished difference Result 2489 states and 4794 transitions. [2022-07-19 20:04:23,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 20:04:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:23,595 INFO L225 Difference]: With dead ends: 2489 [2022-07-19 20:04:23,597 INFO L226 Difference]: Without dead ends: 1563 [2022-07-19 20:04:23,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:23,610 INFO L413 NwaCegarLoop]: 569 mSDtfsCounter, 912 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 651 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 651 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:23,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [912 Valid, 580 Invalid, 2985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [651 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 20:04:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1563 states. [2022-07-19 20:04:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1563 to 1563. [2022-07-19 20:04:23,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.6399743754003844) internal successors, (2560), 1562 states have internal predecessors, (2560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2560 transitions. [2022-07-19 20:04:23,705 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2560 transitions. Word has length 20 [2022-07-19 20:04:23,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:23,706 INFO L495 AbstractCegarLoop]: Abstraction has 1563 states and 2560 transitions. [2022-07-19 20:04:23,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,706 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2560 transitions. [2022-07-19 20:04:23,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 20:04:23,707 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:23,707 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] [2022-07-19 20:04:23,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 20:04:23,708 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2022-07-19 20:04:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:23,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244915291] [2022-07-19 20:04:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:23,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:23,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244915291] [2022-07-19 20:04:23,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244915291] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:23,752 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:23,752 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:23,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658189248] [2022-07-19 20:04:23,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:23,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:23,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:23,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:23,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:23,754 INFO L87 Difference]: Start difference. First operand 1563 states and 2560 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:23,807 INFO L93 Difference]: Finished difference Result 1639 states and 2676 transitions. [2022-07-19 20:04:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:04:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 20:04:23,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:23,812 INFO L225 Difference]: With dead ends: 1639 [2022-07-19 20:04:23,812 INFO L226 Difference]: Without dead ends: 1599 [2022-07-19 20:04:23,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:04:23,814 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:23,814 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:23,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1599 states. [2022-07-19 20:04:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1599 to 1563. [2022-07-19 20:04:23,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1563 states, 1561 states have (on average 1.6297245355541319) internal successors, (2544), 1562 states have internal predecessors, (2544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1563 states to 1563 states and 2544 transitions. [2022-07-19 20:04:23,838 INFO L78 Accepts]: Start accepts. Automaton has 1563 states and 2544 transitions. Word has length 26 [2022-07-19 20:04:23,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:23,838 INFO L495 AbstractCegarLoop]: Abstraction has 1563 states and 2544 transitions. [2022-07-19 20:04:23,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 1563 states and 2544 transitions. [2022-07-19 20:04:23,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 20:04:23,839 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:23,840 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] [2022-07-19 20:04:23,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 20:04:23,840 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2022-07-19 20:04:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391106986] [2022-07-19 20:04:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:23,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:23,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:23,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391106986] [2022-07-19 20:04:23,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391106986] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:23,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:23,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:23,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177536156] [2022-07-19 20:04:23,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:23,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:23,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:23,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:23,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:23,885 INFO L87 Difference]: Start difference. First operand 1563 states and 2544 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:23,905 INFO L93 Difference]: Finished difference Result 1629 states and 2646 transitions. [2022-07-19 20:04:23,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:23,906 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 20:04:23,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:23,910 INFO L225 Difference]: With dead ends: 1629 [2022-07-19 20:04:23,910 INFO L226 Difference]: Without dead ends: 1593 [2022-07-19 20:04:23,911 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:23,912 INFO L413 NwaCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:23,912 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:23,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1593 states. [2022-07-19 20:04:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1593 to 1591. [2022-07-19 20:04:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1589 states have (on average 1.6286972938955318) internal successors, (2588), 1590 states have internal predecessors, (2588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2588 transitions. [2022-07-19 20:04:23,936 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2588 transitions. Word has length 41 [2022-07-19 20:04:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:23,936 INFO L495 AbstractCegarLoop]: Abstraction has 1591 states and 2588 transitions. [2022-07-19 20:04:23,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2588 transitions. [2022-07-19 20:04:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 20:04:23,937 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:23,938 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] [2022-07-19 20:04:23,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 20:04:23,938 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:23,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:23,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2022-07-19 20:04:23,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:23,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745767930] [2022-07-19 20:04:23,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:23,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:23,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:23,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745767930] [2022-07-19 20:04:23,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745767930] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:23,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:23,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:23,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439658077] [2022-07-19 20:04:23,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:23,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:23,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:23,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:23,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:23,987 INFO L87 Difference]: Start difference. First operand 1591 states and 2588 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,055 INFO L93 Difference]: Finished difference Result 1975 states and 3188 transitions. [2022-07-19 20:04:24,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 20:04:24,056 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 20:04:24,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,062 INFO L225 Difference]: With dead ends: 1975 [2022-07-19 20:04:24,062 INFO L226 Difference]: Without dead ends: 1911 [2022-07-19 20:04:24,062 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:04:24,063 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2022-07-19 20:04:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1653. [2022-07-19 20:04:24,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1651 states have (on average 1.6250757116898848) internal successors, (2683), 1652 states have internal predecessors, (2683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 2683 transitions. [2022-07-19 20:04:24,092 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 2683 transitions. Word has length 41 [2022-07-19 20:04:24,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,092 INFO L495 AbstractCegarLoop]: Abstraction has 1653 states and 2683 transitions. [2022-07-19 20:04:24,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 2683 transitions. [2022-07-19 20:04:24,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 20:04:24,094 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,094 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] [2022-07-19 20:04:24,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 20:04:24,094 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,095 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2022-07-19 20:04:24,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981500007] [2022-07-19 20:04:24,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:24,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:24,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:24,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981500007] [2022-07-19 20:04:24,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981500007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:24,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:24,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:24,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303189570] [2022-07-19 20:04:24,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:24,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:24,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:24,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:24,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,130 INFO L87 Difference]: Start difference. First operand 1653 states and 2683 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,154 INFO L93 Difference]: Finished difference Result 1840 states and 2970 transitions. [2022-07-19 20:04:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:24,155 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 20:04:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,160 INFO L225 Difference]: With dead ends: 1840 [2022-07-19 20:04:24,160 INFO L226 Difference]: Without dead ends: 1714 [2022-07-19 20:04:24,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,161 INFO L413 NwaCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-07-19 20:04:24,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2022-07-19 20:04:24,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.62046783625731) internal successors, (2771), 1711 states have internal predecessors, (2771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2771 transitions. [2022-07-19 20:04:24,193 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2771 transitions. Word has length 43 [2022-07-19 20:04:24,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,193 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2771 transitions. [2022-07-19 20:04:24,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2771 transitions. [2022-07-19 20:04:24,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 20:04:24,194 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,194 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] [2022-07-19 20:04:24,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 20:04:24,195 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2022-07-19 20:04:24,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687960807] [2022-07-19 20:04:24,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:24,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:24,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:24,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687960807] [2022-07-19 20:04:24,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687960807] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:24,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:24,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:24,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562554434] [2022-07-19 20:04:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:24,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:24,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:24,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:24,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:24,262 INFO L87 Difference]: Start difference. First operand 1712 states and 2771 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,331 INFO L93 Difference]: Finished difference Result 1897 states and 3053 transitions. [2022-07-19 20:04:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:04:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 20:04:24,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,337 INFO L225 Difference]: With dead ends: 1897 [2022-07-19 20:04:24,337 INFO L226 Difference]: Without dead ends: 1714 [2022-07-19 20:04:24,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:04:24,338 INFO L413 NwaCegarLoop]: 1529 mSDtfsCounter, 4476 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4476 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4476 Valid, 1633 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1714 states. [2022-07-19 20:04:24,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1714 to 1712. [2022-07-19 20:04:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1712 states, 1710 states have (on average 1.6187134502923977) internal successors, (2768), 1711 states have internal predecessors, (2768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1712 states to 1712 states and 2768 transitions. [2022-07-19 20:04:24,370 INFO L78 Accepts]: Start accepts. Automaton has 1712 states and 2768 transitions. Word has length 43 [2022-07-19 20:04:24,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,370 INFO L495 AbstractCegarLoop]: Abstraction has 1712 states and 2768 transitions. [2022-07-19 20:04:24,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1712 states and 2768 transitions. [2022-07-19 20:04:24,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 20:04:24,371 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,371 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] [2022-07-19 20:04:24,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 20:04:24,372 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,372 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2022-07-19 20:04:24,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270963736] [2022-07-19 20:04:24,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:24,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:24,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:24,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270963736] [2022-07-19 20:04:24,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270963736] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:24,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:24,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:24,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184960978] [2022-07-19 20:04:24,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:24,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:24,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:24,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,476 INFO L87 Difference]: Start difference. First operand 1712 states and 2768 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,506 INFO L93 Difference]: Finished difference Result 2042 states and 3264 transitions. [2022-07-19 20:04:24,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:24,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 20:04:24,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,512 INFO L225 Difference]: With dead ends: 2042 [2022-07-19 20:04:24,513 INFO L226 Difference]: Without dead ends: 1859 [2022-07-19 20:04:24,513 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,514 INFO L413 NwaCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,514 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2022-07-19 20:04:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1857. [2022-07-19 20:04:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1857 states, 1855 states have (on average 1.6059299191374663) internal successors, (2979), 1856 states have internal predecessors, (2979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1857 states to 1857 states and 2979 transitions. [2022-07-19 20:04:24,553 INFO L78 Accepts]: Start accepts. Automaton has 1857 states and 2979 transitions. Word has length 43 [2022-07-19 20:04:24,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,553 INFO L495 AbstractCegarLoop]: Abstraction has 1857 states and 2979 transitions. [2022-07-19 20:04:24,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1857 states and 2979 transitions. [2022-07-19 20:04:24,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 20:04:24,554 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,555 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] [2022-07-19 20:04:24,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 20:04:24,555 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2022-07-19 20:04:24,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262768500] [2022-07-19 20:04:24,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:24,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:24,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262768500] [2022-07-19 20:04:24,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262768500] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:24,578 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:24,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:24,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737079954] [2022-07-19 20:04:24,578 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:24,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:24,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:24,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:24,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,579 INFO L87 Difference]: Start difference. First operand 1857 states and 2979 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,618 INFO L93 Difference]: Finished difference Result 2441 states and 3837 transitions. [2022-07-19 20:04:24,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:24,619 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 20:04:24,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,625 INFO L225 Difference]: With dead ends: 2441 [2022-07-19 20:04:24,625 INFO L226 Difference]: Without dead ends: 2113 [2022-07-19 20:04:24,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:24,626 INFO L413 NwaCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2022-07-19 20:04:24,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 2111. [2022-07-19 20:04:24,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2111 states, 2109 states have (on average 1.5813181602655286) internal successors, (3335), 2110 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2111 states to 2111 states and 3335 transitions. [2022-07-19 20:04:24,669 INFO L78 Accepts]: Start accepts. Automaton has 2111 states and 3335 transitions. Word has length 43 [2022-07-19 20:04:24,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,670 INFO L495 AbstractCegarLoop]: Abstraction has 2111 states and 3335 transitions. [2022-07-19 20:04:24,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2111 states and 3335 transitions. [2022-07-19 20:04:24,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 20:04:24,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,671 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] [2022-07-19 20:04:24,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 20:04:24,671 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2022-07-19 20:04:24,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294699750] [2022-07-19 20:04:24,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:24,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:24,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:24,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:24,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294699750] [2022-07-19 20:04:24,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294699750] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:24,751 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:24,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 20:04:24,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678719285] [2022-07-19 20:04:24,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:24,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 20:04:24,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:24,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 20:04:24,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 20:04:24,753 INFO L87 Difference]: Start difference. First operand 2111 states and 3335 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:24,904 INFO L93 Difference]: Finished difference Result 2634 states and 4063 transitions. [2022-07-19 20:04:24,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 20:04:24,905 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 20:04:24,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:24,913 INFO L225 Difference]: With dead ends: 2634 [2022-07-19 20:04:24,913 INFO L226 Difference]: Without dead ends: 2632 [2022-07-19 20:04:24,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-19 20:04:24,915 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 331 mSDsluCounter, 8972 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 10503 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:24,915 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 10503 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:24,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2632 states. [2022-07-19 20:04:24,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2632 to 2159. [2022-07-19 20:04:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2159 states, 2157 states have (on average 1.5665275846082523) internal successors, (3379), 2158 states have internal predecessors, (3379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2159 states to 2159 states and 3379 transitions. [2022-07-19 20:04:24,979 INFO L78 Accepts]: Start accepts. Automaton has 2159 states and 3379 transitions. Word has length 44 [2022-07-19 20:04:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:24,979 INFO L495 AbstractCegarLoop]: Abstraction has 2159 states and 3379 transitions. [2022-07-19 20:04:24,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 2159 states and 3379 transitions. [2022-07-19 20:04:24,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 20:04:24,981 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:24,981 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:24,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 20:04:24,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:24,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:24,982 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2022-07-19 20:04:24,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:24,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279146850] [2022-07-19 20:04:24,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:24,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 20:04:25,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:25,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279146850] [2022-07-19 20:04:25,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279146850] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:25,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:25,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:25,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169133804] [2022-07-19 20:04:25,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:25,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:25,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:25,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:25,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:25,057 INFO L87 Difference]: Start difference. First operand 2159 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:25,197 INFO L93 Difference]: Finished difference Result 4187 states and 6227 transitions. [2022-07-19 20:04:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:04:25,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-19 20:04:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:25,206 INFO L225 Difference]: With dead ends: 4187 [2022-07-19 20:04:25,207 INFO L226 Difference]: Without dead ends: 3557 [2022-07-19 20:04:25,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:04:25,208 INFO L413 NwaCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:25,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:25,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3557 states. [2022-07-19 20:04:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3557 to 2787. [2022-07-19 20:04:25,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2787 states, 2785 states have (on average 1.5278276481149013) internal successors, (4255), 2786 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2787 states to 2787 states and 4255 transitions. [2022-07-19 20:04:25,333 INFO L78 Accepts]: Start accepts. Automaton has 2787 states and 4255 transitions. Word has length 64 [2022-07-19 20:04:25,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:25,334 INFO L495 AbstractCegarLoop]: Abstraction has 2787 states and 4255 transitions. [2022-07-19 20:04:25,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2787 states and 4255 transitions. [2022-07-19 20:04:25,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 20:04:25,335 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:25,335 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:25,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 20:04:25,335 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:25,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:25,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2022-07-19 20:04:25,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:25,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903771086] [2022-07-19 20:04:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:25,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 20:04:25,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:25,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903771086] [2022-07-19 20:04:25,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903771086] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:25,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:25,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:25,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716785248] [2022-07-19 20:04:25,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:25,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:25,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:25,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:25,372 INFO L87 Difference]: Start difference. First operand 2787 states and 4255 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:25,549 INFO L93 Difference]: Finished difference Result 4815 states and 7103 transitions. [2022-07-19 20:04:25,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:04:25,550 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-19 20:04:25,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:25,561 INFO L225 Difference]: With dead ends: 4815 [2022-07-19 20:04:25,561 INFO L226 Difference]: Without dead ends: 4185 [2022-07-19 20:04:25,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:04:25,563 INFO L413 NwaCegarLoop]: 1564 mSDtfsCounter, 3065 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3065 SdHoareTripleChecker+Valid, 3213 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3065 Valid, 3213 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:25,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2022-07-19 20:04:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3731. [2022-07-19 20:04:25,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3731 states, 3729 states have (on average 1.4907481898632342) internal successors, (5559), 3730 states have internal predecessors, (5559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3731 states to 3731 states and 5559 transitions. [2022-07-19 20:04:25,712 INFO L78 Accepts]: Start accepts. Automaton has 3731 states and 5559 transitions. Word has length 64 [2022-07-19 20:04:25,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:25,713 INFO L495 AbstractCegarLoop]: Abstraction has 3731 states and 5559 transitions. [2022-07-19 20:04:25,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:25,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3731 states and 5559 transitions. [2022-07-19 20:04:25,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 20:04:25,714 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:25,714 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:25,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 20:04:25,715 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:25,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:25,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2022-07-19 20:04:25,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:25,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197171593] [2022-07-19 20:04:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:25,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:25,765 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:04:25,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:25,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197171593] [2022-07-19 20:04:25,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197171593] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:25,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:25,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:04:25,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900967432] [2022-07-19 20:04:25,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:25,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:04:25,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:25,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:04:25,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:04:25,768 INFO L87 Difference]: Start difference. First operand 3731 states and 5559 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:26,026 INFO L93 Difference]: Finished difference Result 5083 states and 7483 transitions. [2022-07-19 20:04:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:04:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2022-07-19 20:04:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:26,046 INFO L225 Difference]: With dead ends: 5083 [2022-07-19 20:04:26,046 INFO L226 Difference]: Without dead ends: 4633 [2022-07-19 20:04:26,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 20:04:26,048 INFO L413 NwaCegarLoop]: 1562 mSDtfsCounter, 3066 mSDsluCounter, 1619 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3066 SdHoareTripleChecker+Valid, 3181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:26,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3066 Valid, 3181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:26,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2022-07-19 20:04:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 4179. [2022-07-19 20:04:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.4821642327028968) internal successors, (6191), 4178 states have internal predecessors, (6191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6191 transitions. [2022-07-19 20:04:26,276 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6191 transitions. Word has length 64 [2022-07-19 20:04:26,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:26,277 INFO L495 AbstractCegarLoop]: Abstraction has 4179 states and 6191 transitions. [2022-07-19 20:04:26,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6191 transitions. [2022-07-19 20:04:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:04:26,279 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:26,279 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:26,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 20:04:26,279 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:26,280 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2022-07-19 20:04:26,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886459810] [2022-07-19 20:04:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:26,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:26,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886459810] [2022-07-19 20:04:26,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886459810] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:26,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:26,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712046003] [2022-07-19 20:04:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:26,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:26,311 INFO L87 Difference]: Start difference. First operand 4179 states and 6191 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:26,494 INFO L93 Difference]: Finished difference Result 6831 states and 9893 transitions. [2022-07-19 20:04:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:26,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 20:04:26,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:26,501 INFO L225 Difference]: With dead ends: 6831 [2022-07-19 20:04:26,502 INFO L226 Difference]: Without dead ends: 4181 [2022-07-19 20:04:26,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:26,506 INFO L413 NwaCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:26,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:26,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2022-07-19 20:04:26,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 4179. [2022-07-19 20:04:26,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 4177 states have (on average 1.4701939190806799) internal successors, (6141), 4178 states have internal predecessors, (6141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6141 transitions. [2022-07-19 20:04:26,665 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6141 transitions. Word has length 65 [2022-07-19 20:04:26,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:26,665 INFO L495 AbstractCegarLoop]: Abstraction has 4179 states and 6141 transitions. [2022-07-19 20:04:26,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,666 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6141 transitions. [2022-07-19 20:04:26,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:04:26,667 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:26,667 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:26,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 20:04:26,667 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:26,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:26,668 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2022-07-19 20:04:26,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:26,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665217912] [2022-07-19 20:04:26,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:26,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:26,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:26,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665217912] [2022-07-19 20:04:26,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665217912] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:04:26,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:04:26,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:04:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020976534] [2022-07-19 20:04:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:04:26,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:04:26,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:26,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:04:26,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:26,691 INFO L87 Difference]: Start difference. First operand 4179 states and 6141 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:26,825 INFO L93 Difference]: Finished difference Result 5507 states and 7968 transitions. [2022-07-19 20:04:26,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:04:26,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 20:04:26,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:26,830 INFO L225 Difference]: With dead ends: 5507 [2022-07-19 20:04:26,830 INFO L226 Difference]: Without dead ends: 2857 [2022-07-19 20:04:26,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:04:26,833 INFO L413 NwaCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:26,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:04:26,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2857 states. [2022-07-19 20:04:26,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2857 to 2855. [2022-07-19 20:04:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2855 states, 2853 states have (on average 1.504030844724851) internal successors, (4291), 2854 states have internal predecessors, (4291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2855 states to 2855 states and 4291 transitions. [2022-07-19 20:04:26,914 INFO L78 Accepts]: Start accepts. Automaton has 2855 states and 4291 transitions. Word has length 65 [2022-07-19 20:04:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:26,915 INFO L495 AbstractCegarLoop]: Abstraction has 2855 states and 4291 transitions. [2022-07-19 20:04:26,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2855 states and 4291 transitions. [2022-07-19 20:04:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-07-19 20:04:26,916 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:26,916 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:26,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 20:04:26,916 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:26,917 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2022-07-19 20:04:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:26,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133875532] [2022-07-19 20:04:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:27,120 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:27,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133875532] [2022-07-19 20:04:27,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133875532] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:04:27,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860074443] [2022-07-19 20:04:27,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:27,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:04:27,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:04:27,122 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) [2022-07-19 20:04:27,140 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 20:04:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:27,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 20:04:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:04:27,351 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:04:27,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:04:27,603 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 20:04:27,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860074443] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:04:27,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:04:27,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 4] total 20 [2022-07-19 20:04:27,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680481137] [2022-07-19 20:04:27,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:04:27,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 20:04:27,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:27,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 20:04:27,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-19 20:04:27,607 INFO L87 Difference]: Start difference. First operand 2855 states and 4291 transitions. Second operand has 20 states, 20 states have (on average 8.9) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:32,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:32,021 INFO L93 Difference]: Finished difference Result 15821 states and 21606 transitions. [2022-07-19 20:04:32,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-19 20:04:32,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.9) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2022-07-19 20:04:32,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:32,041 INFO L225 Difference]: With dead ends: 15821 [2022-07-19 20:04:32,042 INFO L226 Difference]: Without dead ends: 14495 [2022-07-19 20:04:32,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 119 SyntacticMatches, 5 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6702 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2917, Invalid=13853, Unknown=0, NotChecked=0, Total=16770 [2022-07-19 20:04:32,049 INFO L413 NwaCegarLoop]: 1592 mSDtfsCounter, 15820 mSDsluCounter, 8600 mSDsCounter, 0 mSdLazyCounter, 1776 mSolverCounterSat, 235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15820 SdHoareTripleChecker+Valid, 10192 SdHoareTripleChecker+Invalid, 2011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 1776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:32,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15820 Valid, 10192 Invalid, 2011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 1776 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 20:04:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14495 states. [2022-07-19 20:04:32,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14495 to 8017. [2022-07-19 20:04:32,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8017 states, 8015 states have (on average 1.374048658764816) internal successors, (11013), 8016 states have internal predecessors, (11013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:32,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8017 states to 8017 states and 11013 transitions. [2022-07-19 20:04:32,522 INFO L78 Accepts]: Start accepts. Automaton has 8017 states and 11013 transitions. Word has length 65 [2022-07-19 20:04:32,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:32,522 INFO L495 AbstractCegarLoop]: Abstraction has 8017 states and 11013 transitions. [2022-07-19 20:04:32,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.9) internal successors, (178), 20 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:32,523 INFO L276 IsEmpty]: Start isEmpty. Operand 8017 states and 11013 transitions. [2022-07-19 20:04:32,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 20:04:32,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:32,524 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:32,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 20:04:32,739 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,SelfDestructingSolverStorable14 [2022-07-19 20:04:32,740 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:32,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1505794396, now seen corresponding path program 1 times [2022-07-19 20:04:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:32,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236195527] [2022-07-19 20:04:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:32,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236195527] [2022-07-19 20:04:32,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236195527] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:04:32,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739867960] [2022-07-19 20:04:32,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:32,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:04:32,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:04:32,879 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) [2022-07-19 20:04:32,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 20:04:32,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:32,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 20:04:32,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:04:33,321 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:33,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:04:33,732 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:33,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739867960] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:04:33,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:04:33,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2022-07-19 20:04:33,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855121727] [2022-07-19 20:04:33,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:04:33,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-19 20:04:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:33,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-19 20:04:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-07-19 20:04:33,734 INFO L87 Difference]: Start difference. First operand 8017 states and 11013 transitions. Second operand has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:04:35,843 INFO L93 Difference]: Finished difference Result 28884 states and 38032 transitions. [2022-07-19 20:04:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 20:04:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-19 20:04:35,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:04:35,880 INFO L225 Difference]: With dead ends: 28884 [2022-07-19 20:04:35,880 INFO L226 Difference]: Without dead ends: 24065 [2022-07-19 20:04:35,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=1051, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 20:04:35,891 INFO L413 NwaCegarLoop]: 1535 mSDtfsCounter, 9454 mSDsluCounter, 5080 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9454 SdHoareTripleChecker+Valid, 6615 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 20:04:35,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9454 Valid, 6615 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 20:04:35,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24065 states. [2022-07-19 20:04:37,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24065 to 15728. [2022-07-19 20:04:37,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15728 states, 15726 states have (on average 1.336322014498283) internal successors, (21015), 15727 states have internal predecessors, (21015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15728 states to 15728 states and 21015 transitions. [2022-07-19 20:04:37,103 INFO L78 Accepts]: Start accepts. Automaton has 15728 states and 21015 transitions. Word has length 66 [2022-07-19 20:04:37,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:04:37,104 INFO L495 AbstractCegarLoop]: Abstraction has 15728 states and 21015 transitions. [2022-07-19 20:04:37,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.904761904761905) internal successors, (145), 20 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:04:37,104 INFO L276 IsEmpty]: Start isEmpty. Operand 15728 states and 21015 transitions. [2022-07-19 20:04:37,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 20:04:37,110 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:04:37,110 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:04:37,132 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 20:04:37,330 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,SelfDestructingSolverStorable15 [2022-07-19 20:04:37,330 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:04:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:04:37,330 INFO L85 PathProgramCache]: Analyzing trace with hash 616171932, now seen corresponding path program 1 times [2022-07-19 20:04:37,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:04:37,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485799708] [2022-07-19 20:04:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:37,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:04:37,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:37,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:04:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485799708] [2022-07-19 20:04:37,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485799708] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:04:37,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524917696] [2022-07-19 20:04:37,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:04:37,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:04:37,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:04:37,464 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) [2022-07-19 20:04:37,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 20:04:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:04:37,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 20:04:37,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:04:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:38,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:04:38,811 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:04:38,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524917696] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:04:38,811 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:04:38,811 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 13] total 32 [2022-07-19 20:04:38,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071953478] [2022-07-19 20:04:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:04:38,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 20:04:38,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:04:38,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 20:04:38,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-07-19 20:04:38,813 INFO L87 Difference]: Start difference. First operand 15728 states and 21015 transitions. Second operand has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:05:42,704 INFO L93 Difference]: Finished difference Result 249043 states and 322008 transitions. [2022-07-19 20:05:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 612 states. [2022-07-19 20:05:42,705 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-19 20:05:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:05:43,373 INFO L225 Difference]: With dead ends: 249043 [2022-07-19 20:05:43,374 INFO L226 Difference]: Without dead ends: 234844 [2022-07-19 20:05:43,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 749 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 639 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208473 ImplicationChecksByTransitivity, 35.6s TimeCoverageRelationStatistics Valid=46191, Invalid=364049, Unknown=0, NotChecked=0, Total=410240 [2022-07-19 20:05:43,499 INFO L413 NwaCegarLoop]: 1636 mSDtfsCounter, 26273 mSDsluCounter, 24258 mSDsCounter, 0 mSdLazyCounter, 3850 mSolverCounterSat, 1512 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26273 SdHoareTripleChecker+Valid, 25894 SdHoareTripleChecker+Invalid, 5362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1512 IncrementalHoareTripleChecker+Valid, 3850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:05:43,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26273 Valid, 25894 Invalid, 5362 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1512 Valid, 3850 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 20:05:43,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234844 states. [2022-07-19 20:05:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234844 to 43308. [2022-07-19 20:05:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43308 states, 43306 states have (on average 1.3129589433334872) internal successors, (56859), 43307 states have internal predecessors, (56859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:50,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43308 states to 43308 states and 56859 transitions. [2022-07-19 20:05:50,167 INFO L78 Accepts]: Start accepts. Automaton has 43308 states and 56859 transitions. Word has length 66 [2022-07-19 20:05:50,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:05:50,167 INFO L495 AbstractCegarLoop]: Abstraction has 43308 states and 56859 transitions. [2022-07-19 20:05:50,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.5625) internal successors, (178), 32 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:50,168 INFO L276 IsEmpty]: Start isEmpty. Operand 43308 states and 56859 transitions. [2022-07-19 20:05:50,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 20:05:50,171 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:05:50,171 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:05:50,188 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 20:05:50,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:05:50,390 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:05:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:05:50,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2022-07-19 20:05:50,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:05:50,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914875783] [2022-07-19 20:05:50,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:05:50,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:05:50,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:05:50,435 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 20:05:50,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:05:50,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914875783] [2022-07-19 20:05:50,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914875783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:05:50,436 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:05:50,436 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:05:50,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443993985] [2022-07-19 20:05:50,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:05:50,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:05:50,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:05:50,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:05:50,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:05:50,438 INFO L87 Difference]: Start difference. First operand 43308 states and 56859 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:54,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:05:54,180 INFO L93 Difference]: Finished difference Result 69153 states and 90326 transitions. [2022-07-19 20:05:54,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:05:54,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2022-07-19 20:05:54,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:05:54,216 INFO L225 Difference]: With dead ends: 69153 [2022-07-19 20:05:54,217 INFO L226 Difference]: Without dead ends: 27374 [2022-07-19 20:05:54,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:05:54,241 INFO L413 NwaCegarLoop]: 1504 mSDtfsCounter, 4540 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4540 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:05:54,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4540 Valid, 2977 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:05:54,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27374 states. [2022-07-19 20:05:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27374 to 27374. [2022-07-19 20:05:57,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27374 states, 27372 states have (on average 1.2877027619465147) internal successors, (35247), 27373 states have internal predecessors, (35247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:57,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27374 states to 27374 states and 35247 transitions. [2022-07-19 20:05:57,835 INFO L78 Accepts]: Start accepts. Automaton has 27374 states and 35247 transitions. Word has length 66 [2022-07-19 20:05:57,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:05:57,836 INFO L495 AbstractCegarLoop]: Abstraction has 27374 states and 35247 transitions. [2022-07-19 20:05:57,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:05:57,836 INFO L276 IsEmpty]: Start isEmpty. Operand 27374 states and 35247 transitions. [2022-07-19 20:05:57,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:05:57,837 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:05:57,838 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:05:57,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 20:05:57,839 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:05:57,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:05:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 138650479, now seen corresponding path program 1 times [2022-07-19 20:05:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:05:57,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616709808] [2022-07-19 20:05:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:05:57,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:05:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:05:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:05:58,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:05:58,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616709808] [2022-07-19 20:05:58,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616709808] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:05:58,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732765718] [2022-07-19 20:05:58,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:05:58,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:05:58,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:05:58,080 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) [2022-07-19 20:05:58,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 20:05:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:05:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-19 20:05:58,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:05:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:05:59,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:06:00,865 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:06:00,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732765718] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:06:00,865 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:06:00,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20, 19] total 48 [2022-07-19 20:06:00,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865699343] [2022-07-19 20:06:00,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:06:00,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 20:06:00,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:06:00,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 20:06:00,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1958, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 20:06:00,867 INFO L87 Difference]: Start difference. First operand 27374 states and 35247 transitions. Second operand has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:06:50,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:06:50,691 INFO L93 Difference]: Finished difference Result 171103 states and 212166 transitions. [2022-07-19 20:06:50,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 368 states. [2022-07-19 20:06:50,692 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-19 20:06:50,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:06:50,969 INFO L225 Difference]: With dead ends: 171103 [2022-07-19 20:06:50,970 INFO L226 Difference]: Without dead ends: 152421 [2022-07-19 20:06:51,012 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 405 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72160 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=17320, Invalid=147922, Unknown=0, NotChecked=0, Total=165242 [2022-07-19 20:06:51,013 INFO L413 NwaCegarLoop]: 2052 mSDtfsCounter, 21064 mSDsluCounter, 28824 mSDsCounter, 0 mSdLazyCounter, 5077 mSolverCounterSat, 615 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21064 SdHoareTripleChecker+Valid, 30876 SdHoareTripleChecker+Invalid, 5692 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 615 IncrementalHoareTripleChecker+Valid, 5077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 20:06:51,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21064 Valid, 30876 Invalid, 5692 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [615 Valid, 5077 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 20:06:51,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152421 states. [2022-07-19 20:06:57,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152421 to 36323. [2022-07-19 20:06:57,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36323 states, 36321 states have (on average 1.2787918834833842) internal successors, (46447), 36322 states have internal predecessors, (46447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:06:57,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36323 states to 36323 states and 46447 transitions. [2022-07-19 20:06:57,996 INFO L78 Accepts]: Start accepts. Automaton has 36323 states and 46447 transitions. Word has length 67 [2022-07-19 20:06:57,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:06:57,996 INFO L495 AbstractCegarLoop]: Abstraction has 36323 states and 46447 transitions. [2022-07-19 20:06:57,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.5833333333333335) internal successors, (172), 48 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:06:57,997 INFO L276 IsEmpty]: Start isEmpty. Operand 36323 states and 46447 transitions. [2022-07-19 20:06:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-19 20:06:57,998 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:06:57,998 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:06:58,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 20:06:58,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:06:58,216 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:06:58,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:06:58,216 INFO L85 PathProgramCache]: Analyzing trace with hash -113994759, now seen corresponding path program 1 times [2022-07-19 20:06:58,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:06:58,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85706091] [2022-07-19 20:06:58,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:06:58,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:06:58,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:06:58,253 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-19 20:06:58,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:06:58,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85706091] [2022-07-19 20:06:58,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85706091] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:06:58,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:06:58,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:06:58,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6958481] [2022-07-19 20:06:58,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:06:58,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:06:58,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:06:58,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:06:58,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:06:58,255 INFO L87 Difference]: Start difference. First operand 36323 states and 46447 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:03,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:03,128 INFO L93 Difference]: Finished difference Result 61960 states and 78906 transitions. [2022-07-19 20:07:03,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:07:03,129 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2022-07-19 20:07:03,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:03,164 INFO L225 Difference]: With dead ends: 61960 [2022-07-19 20:07:03,165 INFO L226 Difference]: Without dead ends: 27166 [2022-07-19 20:07:03,186 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:07:03,186 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4504 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:03,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4504 Valid, 2959 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:07:03,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27166 states. [2022-07-19 20:07:07,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27166 to 27166. [2022-07-19 20:07:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27166 states, 27164 states have (on average 1.271130908555441) internal successors, (34529), 27165 states have internal predecessors, (34529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:07,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27166 states to 27166 states and 34529 transitions. [2022-07-19 20:07:07,928 INFO L78 Accepts]: Start accepts. Automaton has 27166 states and 34529 transitions. Word has length 67 [2022-07-19 20:07:07,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:07,929 INFO L495 AbstractCegarLoop]: Abstraction has 27166 states and 34529 transitions. [2022-07-19 20:07:07,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:07,929 INFO L276 IsEmpty]: Start isEmpty. Operand 27166 states and 34529 transitions. [2022-07-19 20:07:07,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:07:07,930 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:07,930 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:07:07,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-19 20:07:07,930 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:07,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:07,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1235279528, now seen corresponding path program 1 times [2022-07-19 20:07:07,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:07,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432009876] [2022-07-19 20:07:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:07,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:07,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:07,960 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:07,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:07,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432009876] [2022-07-19 20:07:07,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432009876] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:07:07,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:07:07,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 20:07:07,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239651750] [2022-07-19 20:07:07,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:07:07,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:07:07,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:07:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:07:07,962 INFO L87 Difference]: Start difference. First operand 27166 states and 34529 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:09,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:09,751 INFO L93 Difference]: Finished difference Result 35551 states and 44912 transitions. [2022-07-19 20:07:09,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:07:09,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-19 20:07:09,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:09,762 INFO L225 Difference]: With dead ends: 35551 [2022-07-19 20:07:09,762 INFO L226 Difference]: Without dead ends: 9914 [2022-07-19 20:07:09,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:07:09,776 INFO L413 NwaCegarLoop]: 1523 mSDtfsCounter, 16 mSDsluCounter, 1495 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 3018 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:09,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 3018 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:07:09,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9914 states. [2022-07-19 20:07:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9914 to 9333. [2022-07-19 20:07:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9333 states, 9331 states have (on average 1.2864644732611725) internal successors, (12004), 9332 states have internal predecessors, (12004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:11,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9333 states to 9333 states and 12004 transitions. [2022-07-19 20:07:11,341 INFO L78 Accepts]: Start accepts. Automaton has 9333 states and 12004 transitions. Word has length 68 [2022-07-19 20:07:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:11,341 INFO L495 AbstractCegarLoop]: Abstraction has 9333 states and 12004 transitions. [2022-07-19 20:07:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:11,341 INFO L276 IsEmpty]: Start isEmpty. Operand 9333 states and 12004 transitions. [2022-07-19 20:07:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-07-19 20:07:11,342 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:11,342 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:07:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 20:07:11,342 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:11,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:11,343 INFO L85 PathProgramCache]: Analyzing trace with hash 745122100, now seen corresponding path program 1 times [2022-07-19 20:07:11,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:11,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449641438] [2022-07-19 20:07:11,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:11,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:11,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:11,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 20:07:11,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:11,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449641438] [2022-07-19 20:07:11,375 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449641438] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:07:11,375 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:07:11,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 20:07:11,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987699074] [2022-07-19 20:07:11,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:07:11,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 20:07:11,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:11,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 20:07:11,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:07:11,377 INFO L87 Difference]: Start difference. First operand 9333 states and 12004 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:12,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:12,495 INFO L93 Difference]: Finished difference Result 14271 states and 17986 transitions. [2022-07-19 20:07:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-19 20:07:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2022-07-19 20:07:12,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:12,502 INFO L225 Difference]: With dead ends: 14271 [2022-07-19 20:07:12,503 INFO L226 Difference]: Without dead ends: 6491 [2022-07-19 20:07:12,507 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-07-19 20:07:12,508 INFO L413 NwaCegarLoop]: 1490 mSDtfsCounter, 4533 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4533 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:12,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4533 Valid, 2954 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 20:07:12,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6491 states. [2022-07-19 20:07:13,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6491 to 6491. [2022-07-19 20:07:13,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6489 states have (on average 1.291878563723224) internal successors, (8383), 6490 states have internal predecessors, (8383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:13,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 8383 transitions. [2022-07-19 20:07:13,679 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 8383 transitions. Word has length 68 [2022-07-19 20:07:13,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:13,680 INFO L495 AbstractCegarLoop]: Abstraction has 6491 states and 8383 transitions. [2022-07-19 20:07:13,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:13,680 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 8383 transitions. [2022-07-19 20:07:13,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 20:07:13,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:13,681 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:07:13,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 20:07:13,681 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:13,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1362739138, now seen corresponding path program 1 times [2022-07-19 20:07:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092271194] [2022-07-19 20:07:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:13,874 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:13,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:13,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092271194] [2022-07-19 20:07:13,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092271194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:07:13,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376260088] [2022-07-19 20:07:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:13,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:13,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:07:13,876 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) [2022-07-19 20:07:13,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 20:07:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:14,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-19 20:07:14,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:07:15,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:15,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:07:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:15,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376260088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:07:15,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:07:15,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 28 [2022-07-19 20:07:15,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199977447] [2022-07-19 20:07:15,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:07:15,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-19 20:07:15,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:15,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-19 20:07:15,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-07-19 20:07:15,490 INFO L87 Difference]: Start difference. First operand 6491 states and 8383 transitions. Second operand has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:19,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:19,125 INFO L93 Difference]: Finished difference Result 12102 states and 14912 transitions. [2022-07-19 20:07:19,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 20:07:19,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-19 20:07:19,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:19,136 INFO L225 Difference]: With dead ends: 12102 [2022-07-19 20:07:19,136 INFO L226 Difference]: Without dead ends: 9547 [2022-07-19 20:07:19,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=1634, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 20:07:19,144 INFO L413 NwaCegarLoop]: 1602 mSDtfsCounter, 4953 mSDsluCounter, 17342 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4953 SdHoareTripleChecker+Valid, 18944 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:19,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4953 Valid, 18944 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 20:07:19,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9547 states. [2022-07-19 20:07:20,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9547 to 6761. [2022-07-19 20:07:20,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6761 states, 6759 states have (on average 1.2870247077970114) internal successors, (8699), 6760 states have internal predecessors, (8699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6761 states to 6761 states and 8699 transitions. [2022-07-19 20:07:20,588 INFO L78 Accepts]: Start accepts. Automaton has 6761 states and 8699 transitions. Word has length 69 [2022-07-19 20:07:20,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:20,589 INFO L495 AbstractCegarLoop]: Abstraction has 6761 states and 8699 transitions. [2022-07-19 20:07:20,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.392857142857143) internal successors, (179), 28 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 6761 states and 8699 transitions. [2022-07-19 20:07:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-19 20:07:20,590 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:20,590 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:07:20,608 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 20:07:20,806 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,SelfDestructingSolverStorable22 [2022-07-19 20:07:20,807 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:20,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:20,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1410105670, now seen corresponding path program 1 times [2022-07-19 20:07:20,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:20,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644623424] [2022-07-19 20:07:20,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:20,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:20,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644623424] [2022-07-19 20:07:20,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644623424] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:07:20,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282043235] [2022-07-19 20:07:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:20,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:20,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:07:20,885 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) [2022-07-19 20:07:20,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 20:07:20,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 20:07:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:07:20,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:20,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 20:07:20,966 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282043235] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:07:20,966 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 20:07:20,966 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 20:07:20,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471320925] [2022-07-19 20:07:20,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:07:20,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:07:20,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:20,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:07:20,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:07:20,967 INFO L87 Difference]: Start difference. First operand 6761 states and 8699 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:24,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:24,447 INFO L93 Difference]: Finished difference Result 9767 states and 13626 transitions. [2022-07-19 20:07:24,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:07:24,467 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2022-07-19 20:07:24,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:24,479 INFO L225 Difference]: With dead ends: 9767 [2022-07-19 20:07:24,480 INFO L226 Difference]: Without dead ends: 8263 [2022-07-19 20:07:24,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:07:24,484 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 856 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2197 mSolverCounterSat, 717 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 2914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 717 IncrementalHoareTripleChecker+Valid, 2197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:24,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 550 Invalid, 2914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [717 Valid, 2197 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-07-19 20:07:24,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8263 states. [2022-07-19 20:07:25,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8263 to 8263. [2022-07-19 20:07:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8263 states, 8261 states have (on average 1.2733325263285316) internal successors, (10519), 8262 states have internal predecessors, (10519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8263 states to 8263 states and 10519 transitions. [2022-07-19 20:07:25,834 INFO L78 Accepts]: Start accepts. Automaton has 8263 states and 10519 transitions. Word has length 91 [2022-07-19 20:07:25,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:25,835 INFO L495 AbstractCegarLoop]: Abstraction has 8263 states and 10519 transitions. [2022-07-19 20:07:25,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:25,835 INFO L276 IsEmpty]: Start isEmpty. Operand 8263 states and 10519 transitions. [2022-07-19 20:07:25,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-19 20:07:25,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:25,836 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 20:07:25,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-19 20:07:26,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:26,053 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:26,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 213880004, now seen corresponding path program 1 times [2022-07-19 20:07:26,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:26,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166259349] [2022-07-19 20:07:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:26,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166259349] [2022-07-19 20:07:26,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166259349] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:07:26,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:07:26,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 20:07:26,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257640109] [2022-07-19 20:07:26,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:07:26,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 20:07:26,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 20:07:26,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:07:26,087 INFO L87 Difference]: Start difference. First operand 8263 states and 10519 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:29,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:29,750 INFO L93 Difference]: Finished difference Result 14273 states and 19086 transitions. [2022-07-19 20:07:29,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 20:07:29,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2022-07-19 20:07:29,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:29,762 INFO L225 Difference]: With dead ends: 14273 [2022-07-19 20:07:29,763 INFO L226 Difference]: Without dead ends: 11267 [2022-07-19 20:07:29,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 20:07:29,767 INFO L413 NwaCegarLoop]: 517 mSDtfsCounter, 848 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:29,768 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 523 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-07-19 20:07:29,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11267 states. [2022-07-19 20:07:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11267 to 11267. [2022-07-19 20:07:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11267 states, 11265 states have (on average 1.244207723035952) internal successors, (14016), 11266 states have internal predecessors, (14016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11267 states to 11267 states and 14016 transitions. [2022-07-19 20:07:31,147 INFO L78 Accepts]: Start accepts. Automaton has 11267 states and 14016 transitions. Word has length 95 [2022-07-19 20:07:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:31,147 INFO L495 AbstractCegarLoop]: Abstraction has 11267 states and 14016 transitions. [2022-07-19 20:07:31,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 11267 states and 14016 transitions. [2022-07-19 20:07:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-07-19 20:07:31,149 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:31,149 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 20:07:31,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-19 20:07:31,149 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:31,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:31,150 INFO L85 PathProgramCache]: Analyzing trace with hash 957956051, now seen corresponding path program 1 times [2022-07-19 20:07:31,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:31,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398187868] [2022-07-19 20:07:31,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:31,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:31,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:31,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:31,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:31,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398187868] [2022-07-19 20:07:31,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398187868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 20:07:31,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 20:07:31,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 20:07:31,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519865292] [2022-07-19 20:07:31,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 20:07:31,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 20:07:31,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:31,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 20:07:31,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 20:07:31,214 INFO L87 Difference]: Start difference. First operand 11267 states and 14016 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:36,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:36,886 INFO L93 Difference]: Finished difference Result 21783 states and 26861 transitions. [2022-07-19 20:07:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 20:07:36,886 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2022-07-19 20:07:36,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:36,901 INFO L225 Difference]: With dead ends: 21783 [2022-07-19 20:07:36,901 INFO L226 Difference]: Without dead ends: 15773 [2022-07-19 20:07:36,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2022-07-19 20:07:36,905 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 3814 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5405 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3814 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 5667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 5405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:36,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3814 Valid, 797 Invalid, 5667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 5405 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-07-19 20:07:36,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15773 states. [2022-07-19 20:07:38,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15773 to 15022. [2022-07-19 20:07:38,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15022 states, 15020 states have (on average 1.197936085219707) internal successors, (17993), 15021 states have internal predecessors, (17993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15022 states to 15022 states and 17993 transitions. [2022-07-19 20:07:38,370 INFO L78 Accepts]: Start accepts. Automaton has 15022 states and 17993 transitions. Word has length 101 [2022-07-19 20:07:38,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:38,371 INFO L495 AbstractCegarLoop]: Abstraction has 15022 states and 17993 transitions. [2022-07-19 20:07:38,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 4 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 15022 states and 17993 transitions. [2022-07-19 20:07:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 20:07:38,373 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:38,373 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 20:07:38,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-19 20:07:38,373 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:38,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:38,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1940957519, now seen corresponding path program 1 times [2022-07-19 20:07:38,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:38,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782987488] [2022-07-19 20:07:38,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:38,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:38,537 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:38,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:38,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782987488] [2022-07-19 20:07:38,538 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782987488] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:07:38,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973592635] [2022-07-19 20:07:38,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:38,538 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:07:38,540 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) [2022-07-19 20:07:38,541 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 20:07:38,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:38,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 20:07:38,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 20:07:39,336 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:39,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 20:07:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:40,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [973592635] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 20:07:40,337 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 20:07:40,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-07-19 20:07:40,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083402814] [2022-07-19 20:07:40,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 20:07:40,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 20:07:40,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 20:07:40,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 20:07:40,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-07-19 20:07:40,339 INFO L87 Difference]: Start difference. First operand 15022 states and 17993 transitions. Second operand has 29 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:44,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 20:07:44,184 INFO L93 Difference]: Finished difference Result 18929 states and 22668 transitions. [2022-07-19 20:07:44,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 20:07:44,185 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2022-07-19 20:07:44,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 20:07:44,200 INFO L225 Difference]: With dead ends: 18929 [2022-07-19 20:07:44,200 INFO L226 Difference]: Without dead ends: 15551 [2022-07-19 20:07:44,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=456, Invalid=1436, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 20:07:44,204 INFO L413 NwaCegarLoop]: 1530 mSDtfsCounter, 15273 mSDsluCounter, 16661 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15273 SdHoareTripleChecker+Valid, 18191 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 20:07:44,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15273 Valid, 18191 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 20:07:44,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15551 states. [2022-07-19 20:07:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15551 to 15022. [2022-07-19 20:07:46,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15022 states, 15020 states have (on average 1.1947403462050599) internal successors, (17945), 15021 states have internal predecessors, (17945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:46,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15022 states to 15022 states and 17945 transitions. [2022-07-19 20:07:46,047 INFO L78 Accepts]: Start accepts. Automaton has 15022 states and 17945 transitions. Word has length 111 [2022-07-19 20:07:46,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 20:07:46,047 INFO L495 AbstractCegarLoop]: Abstraction has 15022 states and 17945 transitions. [2022-07-19 20:07:46,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.620689655172415) internal successors, (279), 28 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 20:07:46,048 INFO L276 IsEmpty]: Start isEmpty. Operand 15022 states and 17945 transitions. [2022-07-19 20:07:46,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 20:07:46,050 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 20:07:46,050 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-07-19 20:07:46,073 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 20:07:46,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:46,267 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 20:07:46,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 20:07:46,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1600436991, now seen corresponding path program 1 times [2022-07-19 20:07:46,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 20:07:46,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063016636] [2022-07-19 20:07:46,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:46,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 20:07:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 34 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 20:07:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 20:07:46,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063016636] [2022-07-19 20:07:46,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063016636] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 20:07:46,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884271394] [2022-07-19 20:07:46,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 20:07:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 20:07:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 20:07:46,535 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 20:07:46,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 20:07:46,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 20:07:46,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-19 20:07:46,634 INFO L286 TraceCheckSpWp]: Computing forward predicates...