./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label16.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label16.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 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 12:32:14,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 12:32:14,875 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 12:32:14,921 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 12:32:14,923 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 12:32:14,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 12:32:14,929 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 12:32:14,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 12:32:14,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 12:32:14,939 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 12:32:14,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 12:32:14,942 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 12:32:14,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 12:32:14,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 12:32:14,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 12:32:14,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 12:32:14,950 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 12:32:14,951 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 12:32:14,953 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 12:32:14,958 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 12:32:14,962 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 12:32:14,964 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 12:32:14,965 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 12:32:14,966 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 12:32:14,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 12:32:14,970 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 12:32:14,971 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 12:32:14,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 12:32:14,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 12:32:14,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 12:32:14,975 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 12:32:14,975 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 12:32:14,977 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 12:32:14,977 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 12:32:14,978 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 12:32:14,979 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 12:32:14,979 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 12:32:14,980 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 12:32:14,980 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 12:32:14,980 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 12:32:14,981 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 12:32:14,982 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 12:32:14,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 12:32:15,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 12:32:15,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 12:32:15,020 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 12:32:15,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 12:32:15,021 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 12:32:15,021 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 12:32:15,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 12:32:15,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 12:32:15,022 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 12:32:15,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 12:32:15,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 12:32:15,025 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 12:32:15,025 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 12:32:15,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 12:32:15,025 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 12:32:15,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 12:32:15,026 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 12:32:15,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 12:32:15,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 12:32:15,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:32:15,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 12:32:15,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 12:32:15,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 12:32:15,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 12:32:15,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 12:32:15,028 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 12:32:15,028 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 12:32:15,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 12:32:15,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b5d267cd1e473b445c52ec06f60f3c8a73f12a2c5a7f8cdb18f8745b90aa156 [2022-07-22 12:32:15,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 12:32:15,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 12:32:15,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 12:32:15,327 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 12:32:15,328 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 12:32:15,329 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2022-07-22 12:32:15,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda4aaed2/b575dd3b033a427c9f0accb79974fdea/FLAG64ee7fa88 [2022-07-22 12:32:16,140 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 12:32:16,141 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c [2022-07-22 12:32:16,172 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda4aaed2/b575dd3b033a427c9f0accb79974fdea/FLAG64ee7fa88 [2022-07-22 12:32:16,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda4aaed2/b575dd3b033a427c9f0accb79974fdea [2022-07-22 12:32:16,232 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 12:32:16,234 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 12:32:16,235 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 12:32:16,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 12:32:16,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 12:32:16,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:32:16" (1/1) ... [2022-07-22 12:32:16,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@134f77f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:16, skipping insertion in model container [2022-07-22 12:32:16,240 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 12:32:16" (1/1) ... [2022-07-22 12:32:16,246 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 12:32:16,352 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 12:32:16,591 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2022-07-22 12:32:17,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:32:17,415 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 12:32:17,442 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label16.c[3388,3401] [2022-07-22 12:32:17,882 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 12:32:17,904 INFO L208 MainTranslator]: Completed translation [2022-07-22 12:32:17,905 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17 WrapperNode [2022-07-22 12:32:17,905 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 12:32:17,906 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 12:32:17,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 12:32:17,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 12:32:17,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:17,989 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:18,575 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-22 12:32:18,576 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 12:32:18,577 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 12:32:18,577 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 12:32:18,577 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 12:32:18,584 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:18,585 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:18,727 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:18,728 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:19,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:19,082 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:19,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:19,279 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 12:32:19,282 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 12:32:19,283 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 12:32:19,283 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 12:32:19,284 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (1/1) ... [2022-07-22 12:32:19,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 12:32:19,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:32:19,312 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) [2022-07-22 12:32:19,314 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 [2022-07-22 12:32:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 12:32:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 12:32:19,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 12:32:19,342 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 12:32:19,396 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 12:32:19,398 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 12:32:24,117 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 12:32:24,133 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 12:32:24,134 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 12:32:24,137 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:32:24 BoogieIcfgContainer [2022-07-22 12:32:24,137 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 12:32:24,139 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 12:32:24,139 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 12:32:24,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 12:32:24,142 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 12:32:16" (1/3) ... [2022-07-22 12:32:24,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96eff31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:32:24, skipping insertion in model container [2022-07-22 12:32:24,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 12:32:17" (2/3) ... [2022-07-22 12:32:24,144 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@96eff31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 12:32:24, skipping insertion in model container [2022-07-22 12:32:24,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 12:32:24" (3/3) ... [2022-07-22 12:32:24,145 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label16.c [2022-07-22 12:32:24,157 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 12:32:24,158 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 12:32:24,222 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 12:32:24,228 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@25376099, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5e90e003 [2022-07-22 12:32:24,228 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 12:32:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:24,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 12:32:24,244 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:24,244 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] [2022-07-22 12:32:24,245 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:24,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2022-07-22 12:32:24,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:24,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998715495] [2022-07-22 12:32:24,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:24,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:24,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:32:24,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:24,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998715495] [2022-07-22 12:32:24,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998715495] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:24,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:24,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:32:24,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77976902] [2022-07-22 12:32:24,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:24,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:24,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:24,462 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:28,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:28,528 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2022-07-22 12:32:28,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:28,531 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2022-07-22 12:32:28,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:28,556 INFO L225 Difference]: With dead ends: 3035 [2022-07-22 12:32:28,556 INFO L226 Difference]: Without dead ends: 1873 [2022-07-22 12:32:28,562 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 [2022-07-22 12:32:28,565 INFO L413 NwaCegarLoop]: 991 mSDtfsCounter, 883 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 883 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:28,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [883 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-07-22 12:32:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2022-07-22 12:32:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2022-07-22 12:32:28,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:28,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2022-07-22 12:32:28,666 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 22 [2022-07-22 12:32:28,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:28,667 INFO L495 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2022-07-22 12:32:28,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2022-07-22 12:32:28,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 12:32:28,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:28,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:28,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 12:32:28,671 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:28,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 209102453, now seen corresponding path program 1 times [2022-07-22 12:32:28,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007470342] [2022-07-22 12:32:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:28,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:28,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:28,907 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:32:28,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:28,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007470342] [2022-07-22 12:32:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007470342] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:28,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:28,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:32:28,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803150992] [2022-07-22 12:32:28,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:28,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:28,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:28,914 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:32,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:32,435 INFO L93 Difference]: Finished difference Result 5317 states and 8229 transitions. [2022-07-22 12:32:32,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:32,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 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 94 [2022-07-22 12:32:32,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:32,448 INFO L225 Difference]: With dead ends: 5317 [2022-07-22 12:32:32,449 INFO L226 Difference]: Without dead ends: 3460 [2022-07-22 12:32:32,452 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 [2022-07-22 12:32:32,453 INFO L413 NwaCegarLoop]: 1039 mSDtfsCounter, 826 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 826 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 3279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:32,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [826 Valid, 1192 Invalid, 3279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-22 12:32:32,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3460 states. [2022-07-22 12:32:32,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3460 to 3459. [2022-07-22 12:32:32,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3459 states, 3458 states have (on average 1.3805668016194332) internal successors, (4774), 3458 states have internal predecessors, (4774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:32,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3459 states to 3459 states and 4774 transitions. [2022-07-22 12:32:32,514 INFO L78 Accepts]: Start accepts. Automaton has 3459 states and 4774 transitions. Word has length 94 [2022-07-22 12:32:32,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:32,516 INFO L495 AbstractCegarLoop]: Abstraction has 3459 states and 4774 transitions. [2022-07-22 12:32:32,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.333333333333332) internal successors, (94), 2 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:32,516 INFO L276 IsEmpty]: Start isEmpty. Operand 3459 states and 4774 transitions. [2022-07-22 12:32:32,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-07-22 12:32:32,525 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:32,525 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:32,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 12:32:32,528 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:32,529 INFO L85 PathProgramCache]: Analyzing trace with hash 169265708, now seen corresponding path program 1 times [2022-07-22 12:32:32,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:32,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602469861] [2022-07-22 12:32:32,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:32,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:32,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:32,721 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:32:32,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602469861] [2022-07-22 12:32:32,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602469861] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:32,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:32,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:32,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157625099] [2022-07-22 12:32:32,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:32,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:32:32,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:32:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:32:32,725 INFO L87 Difference]: Start difference. First operand 3459 states and 4774 transitions. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:37,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:37,434 INFO L93 Difference]: Finished difference Result 10870 states and 14768 transitions. [2022-07-22 12:32:37,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:32:37,434 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2022-07-22 12:32:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:37,460 INFO L225 Difference]: With dead ends: 10870 [2022-07-22 12:32:37,460 INFO L226 Difference]: Without dead ends: 7413 [2022-07-22 12:32:37,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:32:37,468 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 2579 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 4117 mSolverCounterSat, 834 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 1003 SdHoareTripleChecker+Invalid, 4951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 834 IncrementalHoareTripleChecker+Valid, 4117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:37,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2579 Valid, 1003 Invalid, 4951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [834 Valid, 4117 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-07-22 12:32:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7413 states. [2022-07-22 12:32:37,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7413 to 7412. [2022-07-22 12:32:37,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 1.2698691134799622) internal successors, (9411), 7411 states have internal predecessors, (9411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:37,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 9411 transitions. [2022-07-22 12:32:37,590 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 9411 transitions. Word has length 108 [2022-07-22 12:32:37,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:37,590 INFO L495 AbstractCegarLoop]: Abstraction has 7412 states and 9411 transitions. [2022-07-22 12:32:37,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:37,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 9411 transitions. [2022-07-22 12:32:37,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-07-22 12:32:37,593 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:37,593 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:37,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 12:32:37,594 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:37,595 INFO L85 PathProgramCache]: Analyzing trace with hash 500012194, now seen corresponding path program 1 times [2022-07-22 12:32:37,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650412728] [2022-07-22 12:32:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:37,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-22 12:32:37,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:37,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650412728] [2022-07-22 12:32:37,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650412728] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:37,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:37,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:32:37,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338079892] [2022-07-22 12:32:37,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:37,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:37,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:37,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:37,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:37,851 INFO L87 Difference]: Start difference. First operand 7412 states and 9411 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:41,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:41,118 INFO L93 Difference]: Finished difference Result 20355 states and 26251 transitions. [2022-07-22 12:32:41,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:41,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 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 189 [2022-07-22 12:32:41,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:41,166 INFO L225 Difference]: With dead ends: 20355 [2022-07-22 12:32:41,167 INFO L226 Difference]: Without dead ends: 13732 [2022-07-22 12:32:41,182 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 [2022-07-22 12:32:41,183 INFO L413 NwaCegarLoop]: 850 mSDtfsCounter, 888 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 2575 mSolverCounterSat, 748 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 888 SdHoareTripleChecker+Valid, 978 SdHoareTripleChecker+Invalid, 3323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 748 IncrementalHoareTripleChecker+Valid, 2575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:41,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [888 Valid, 978 Invalid, 3323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [748 Valid, 2575 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:32:41,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13732 states. [2022-07-22 12:32:41,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13732 to 12937. [2022-07-22 12:32:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12937 states, 12936 states have (on average 1.215213358070501) internal successors, (15720), 12936 states have internal predecessors, (15720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:41,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12937 states to 12937 states and 15720 transitions. [2022-07-22 12:32:41,453 INFO L78 Accepts]: Start accepts. Automaton has 12937 states and 15720 transitions. Word has length 189 [2022-07-22 12:32:41,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:41,454 INFO L495 AbstractCegarLoop]: Abstraction has 12937 states and 15720 transitions. [2022-07-22 12:32:41,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 2 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand 12937 states and 15720 transitions. [2022-07-22 12:32:41,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-07-22 12:32:41,458 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:41,458 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:41,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 12:32:41,459 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:41,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1787709102, now seen corresponding path program 1 times [2022-07-22 12:32:41,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:41,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137037378] [2022-07-22 12:32:41,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:41,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 12:32:41,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:41,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137037378] [2022-07-22 12:32:41,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137037378] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:41,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:41,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:41,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756449153] [2022-07-22 12:32:41,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:41,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:41,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:41,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:41,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:41,615 INFO L87 Difference]: Start difference. First operand 12937 states and 15720 transitions. Second operand has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:44,880 INFO L93 Difference]: Finished difference Result 31392 states and 39119 transitions. [2022-07-22 12:32:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 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 221 [2022-07-22 12:32:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:44,918 INFO L225 Difference]: With dead ends: 31392 [2022-07-22 12:32:44,918 INFO L226 Difference]: Without dead ends: 19244 [2022-07-22 12:32:44,931 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 [2022-07-22 12:32:44,933 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 858 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 914 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 858 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 3295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 914 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:44,934 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [858 Valid, 926 Invalid, 3295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [914 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:32:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19244 states. [2022-07-22 12:32:45,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19244 to 18447. [2022-07-22 12:32:45,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18447 states, 18446 states have (on average 1.2024287108316165) internal successors, (22180), 18446 states have internal predecessors, (22180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18447 states to 18447 states and 22180 transitions. [2022-07-22 12:32:45,192 INFO L78 Accepts]: Start accepts. Automaton has 18447 states and 22180 transitions. Word has length 221 [2022-07-22 12:32:45,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:45,193 INFO L495 AbstractCegarLoop]: Abstraction has 18447 states and 22180 transitions. [2022-07-22 12:32:45,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.66666666666667) internal successors, (221), 3 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:45,197 INFO L276 IsEmpty]: Start isEmpty. Operand 18447 states and 22180 transitions. [2022-07-22 12:32:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-22 12:32:45,203 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:45,203 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:45,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 12:32:45,204 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:45,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:45,204 INFO L85 PathProgramCache]: Analyzing trace with hash 947672488, now seen corresponding path program 1 times [2022-07-22 12:32:45,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:45,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512158007] [2022-07-22 12:32:45,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:45,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:32:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:45,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512158007] [2022-07-22 12:32:45,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512158007] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:45,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:45,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:45,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462232028] [2022-07-22 12:32:45,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:45,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:45,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:45,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:45,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:45,389 INFO L87 Difference]: Start difference. First operand 18447 states and 22180 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:49,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:49,373 INFO L93 Difference]: Finished difference Result 52772 states and 63784 transitions. [2022-07-22 12:32:49,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:32:49,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 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 310 [2022-07-22 12:32:49,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:49,425 INFO L225 Difference]: With dead ends: 52772 [2022-07-22 12:32:49,425 INFO L226 Difference]: Without dead ends: 35114 [2022-07-22 12:32:49,442 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 [2022-07-22 12:32:49,443 INFO L413 NwaCegarLoop]: 1700 mSDtfsCounter, 951 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 3128 mSolverCounterSat, 603 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 951 SdHoareTripleChecker+Valid, 1819 SdHoareTripleChecker+Invalid, 3731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 603 IncrementalHoareTripleChecker+Valid, 3128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:49,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [951 Valid, 1819 Invalid, 3731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [603 Valid, 3128 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 12:32:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35114 states. [2022-07-22 12:32:49,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35114 to 34274. [2022-07-22 12:32:49,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34274 states, 34273 states have (on average 1.1858897674554314) internal successors, (40644), 34273 states have internal predecessors, (40644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:49,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34274 states to 34274 states and 40644 transitions. [2022-07-22 12:32:49,848 INFO L78 Accepts]: Start accepts. Automaton has 34274 states and 40644 transitions. Word has length 310 [2022-07-22 12:32:49,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:49,849 INFO L495 AbstractCegarLoop]: Abstraction has 34274 states and 40644 transitions. [2022-07-22 12:32:49,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:49,849 INFO L276 IsEmpty]: Start isEmpty. Operand 34274 states and 40644 transitions. [2022-07-22 12:32:49,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-07-22 12:32:49,854 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:49,854 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:32:49,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 12:32:49,855 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:49,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:49,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1734427868, now seen corresponding path program 1 times [2022-07-22 12:32:49,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:49,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487521347] [2022-07-22 12:32:49,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:49,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 12:32:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:49,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487521347] [2022-07-22 12:32:49,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487521347] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:49,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:49,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:32:49,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385336077] [2022-07-22 12:32:49,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:49,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:32:49,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:49,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:32:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:32:49,983 INFO L87 Difference]: Start difference. First operand 34274 states and 40644 transitions. Second operand has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:56,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:32:56,605 INFO L93 Difference]: Finished difference Result 108144 states and 129355 transitions. [2022-07-22 12:32:56,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:32:56,608 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 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 310 [2022-07-22 12:32:56,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:32:56,722 INFO L225 Difference]: With dead ends: 108144 [2022-07-22 12:32:56,723 INFO L226 Difference]: Without dead ends: 74659 [2022-07-22 12:32:56,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:32:56,759 INFO L413 NwaCegarLoop]: 596 mSDtfsCounter, 1728 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 6796 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 7882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 6796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:32:56,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 846 Invalid, 7882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 6796 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-07-22 12:32:56,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74659 states. [2022-07-22 12:32:57,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74659 to 74498. [2022-07-22 12:32:57,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74498 states, 74497 states have (on average 1.170892787629032) internal successors, (87228), 74497 states have internal predecessors, (87228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:57,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74498 states to 74498 states and 87228 transitions. [2022-07-22 12:32:57,852 INFO L78 Accepts]: Start accepts. Automaton has 74498 states and 87228 transitions. Word has length 310 [2022-07-22 12:32:57,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:32:57,853 INFO L495 AbstractCegarLoop]: Abstraction has 74498 states and 87228 transitions. [2022-07-22 12:32:57,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 72.75) internal successors, (291), 3 states have internal predecessors, (291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:32:57,853 INFO L276 IsEmpty]: Start isEmpty. Operand 74498 states and 87228 transitions. [2022-07-22 12:32:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-07-22 12:32:57,862 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:32:57,862 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-22 12:32:57,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-22 12:32:57,862 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:32:57,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:32:57,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2097221119, now seen corresponding path program 1 times [2022-07-22 12:32:57,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:32:57,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891262099] [2022-07-22 12:32:57,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:32:57,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:32:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:32:58,024 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 246 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-07-22 12:32:58,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:32:58,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891262099] [2022-07-22 12:32:58,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891262099] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:32:58,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:32:58,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 12:32:58,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457637929] [2022-07-22 12:32:58,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:32:58,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:32:58,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:32:58,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:32:58,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:32:58,029 INFO L87 Difference]: Start difference. First operand 74498 states and 87228 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:01,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:01,721 INFO L93 Difference]: Finished difference Result 160034 states and 187017 transitions. [2022-07-22 12:33:01,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:01,721 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 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 348 [2022-07-22 12:33:01,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:01,868 INFO L225 Difference]: With dead ends: 160034 [2022-07-22 12:33:01,868 INFO L226 Difference]: Without dead ends: 86325 [2022-07-22 12:33:01,946 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 [2022-07-22 12:33:01,946 INFO L413 NwaCegarLoop]: 1020 mSDtfsCounter, 728 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 1201 SdHoareTripleChecker+Invalid, 2886 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:01,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [728 Valid, 1201 Invalid, 2886 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:33:02,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86325 states. [2022-07-22 12:33:02,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86325 to 86316. [2022-07-22 12:33:02,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86316 states, 86315 states have (on average 1.1568672884203208) internal successors, (99855), 86315 states have internal predecessors, (99855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86316 states to 86316 states and 99855 transitions. [2022-07-22 12:33:03,145 INFO L78 Accepts]: Start accepts. Automaton has 86316 states and 99855 transitions. Word has length 348 [2022-07-22 12:33:03,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:03,145 INFO L495 AbstractCegarLoop]: Abstraction has 86316 states and 99855 transitions. [2022-07-22 12:33:03,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 2 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 86316 states and 99855 transitions. [2022-07-22 12:33:03,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2022-07-22 12:33:03,167 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:03,168 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:03,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-22 12:33:03,170 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:03,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -2065811671, now seen corresponding path program 1 times [2022-07-22 12:33:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:03,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458262463] [2022-07-22 12:33:03,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:03,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:03,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 12:33:03,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:03,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458262463] [2022-07-22 12:33:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458262463] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267656743] [2022-07-22 12:33:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:03,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:03,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:03,650 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) [2022-07-22 12:33:03,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 12:33:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:03,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:33:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:04,023 INFO L134 CoverageAnalysis]: Checked inductivity of 395 backedges. 262 proven. 0 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-22 12:33:04,023 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:04,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267656743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:04,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:04,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:33:04,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169907602] [2022-07-22 12:33:04,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:04,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:04,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:04,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:04,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:04,026 INFO L87 Difference]: Start difference. First operand 86316 states and 99855 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:07,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:07,263 INFO L93 Difference]: Finished difference Result 171840 states and 198914 transitions. [2022-07-22 12:33:07,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:07,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 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 377 [2022-07-22 12:33:07,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:07,372 INFO L225 Difference]: With dead ends: 171840 [2022-07-22 12:33:07,373 INFO L226 Difference]: Without dead ends: 86313 [2022-07-22 12:33:07,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 376 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:07,402 INFO L413 NwaCegarLoop]: 1364 mSDtfsCounter, 1094 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1446 SdHoareTripleChecker+Invalid, 2918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:07,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1094 Valid, 1446 Invalid, 2918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:33:07,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86313 states. [2022-07-22 12:33:08,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86313 to 86311. [2022-07-22 12:33:08,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86311 states, 86310 states have (on average 1.1199397520565404) internal successors, (96662), 86310 states have internal predecessors, (96662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:08,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86311 states to 86311 states and 96662 transitions. [2022-07-22 12:33:08,432 INFO L78 Accepts]: Start accepts. Automaton has 86311 states and 96662 transitions. Word has length 377 [2022-07-22 12:33:08,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:08,433 INFO L495 AbstractCegarLoop]: Abstraction has 86311 states and 96662 transitions. [2022-07-22 12:33:08,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:08,433 INFO L276 IsEmpty]: Start isEmpty. Operand 86311 states and 96662 transitions. [2022-07-22 12:33:08,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2022-07-22 12:33:08,439 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:08,439 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:08,467 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 12:33:08,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:08,664 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:08,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:08,665 INFO L85 PathProgramCache]: Analyzing trace with hash 2022662319, now seen corresponding path program 1 times [2022-07-22 12:33:08,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:08,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152937494] [2022-07-22 12:33:08,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:08,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 408 proven. 0 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-07-22 12:33:08,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:08,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152937494] [2022-07-22 12:33:08,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152937494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:08,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:08,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194681895] [2022-07-22 12:33:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:08,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:08,822 INFO L87 Difference]: Start difference. First operand 86311 states and 96662 transitions. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:12,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:12,695 INFO L93 Difference]: Finished difference Result 198608 states and 224799 transitions. [2022-07-22 12:33:12,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:12,695 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 378 [2022-07-22 12:33:12,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:12,861 INFO L225 Difference]: With dead ends: 198608 [2022-07-22 12:33:12,861 INFO L226 Difference]: Without dead ends: 113086 [2022-07-22 12:33:12,908 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 [2022-07-22 12:33:12,909 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 899 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2413 mSolverCounterSat, 946 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 899 SdHoareTripleChecker+Valid, 913 SdHoareTripleChecker+Invalid, 3359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 946 IncrementalHoareTripleChecker+Valid, 2413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:12,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [899 Valid, 913 Invalid, 3359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [946 Valid, 2413 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-22 12:33:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113086 states. [2022-07-22 12:33:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113086 to 111491. [2022-07-22 12:33:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111491 states, 111490 states have (on average 1.1249977576464256) internal successors, (125426), 111490 states have internal predecessors, (125426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:14,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111491 states to 111491 states and 125426 transitions. [2022-07-22 12:33:14,412 INFO L78 Accepts]: Start accepts. Automaton has 111491 states and 125426 transitions. Word has length 378 [2022-07-22 12:33:14,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:14,412 INFO L495 AbstractCegarLoop]: Abstraction has 111491 states and 125426 transitions. [2022-07-22 12:33:14,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:14,413 INFO L276 IsEmpty]: Start isEmpty. Operand 111491 states and 125426 transitions. [2022-07-22 12:33:14,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-07-22 12:33:14,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:14,420 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:14,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 12:33:14,420 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:14,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:14,421 INFO L85 PathProgramCache]: Analyzing trace with hash -351823286, now seen corresponding path program 1 times [2022-07-22 12:33:14,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:14,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985526665] [2022-07-22 12:33:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:14,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 277 proven. 113 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 12:33:14,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:14,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985526665] [2022-07-22 12:33:14,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985526665] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:14,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202930577] [2022-07-22 12:33:14,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:14,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:14,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:14,740 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) [2022-07-22 12:33:14,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 12:33:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:15,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-22 12:33:15,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:15,302 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 297 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-22 12:33:15,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:15,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202930577] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:15,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:15,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-22 12:33:15,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096119626] [2022-07-22 12:33:15,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:15,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:15,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:15,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:15,306 INFO L87 Difference]: Start difference. First operand 111491 states and 125426 transitions. Second operand has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:18,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:18,705 INFO L93 Difference]: Finished difference Result 217428 states and 246761 transitions. [2022-07-22 12:33:18,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:18,706 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 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 452 [2022-07-22 12:33:18,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:18,856 INFO L225 Difference]: With dead ends: 217428 [2022-07-22 12:33:18,856 INFO L226 Difference]: Without dead ends: 122475 [2022-07-22 12:33:19,079 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 451 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-22 12:33:19,081 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1138 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 2262 mSolverCounterSat, 913 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 411 SdHoareTripleChecker+Invalid, 3175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 913 IncrementalHoareTripleChecker+Valid, 2262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:19,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1138 Valid, 411 Invalid, 3175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [913 Valid, 2262 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-22 12:33:19,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122475 states. [2022-07-22 12:33:20,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122475 to 122473. [2022-07-22 12:33:20,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122473 states, 122472 states have (on average 1.1164102815337382) internal successors, (136729), 122472 states have internal predecessors, (136729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122473 states to 122473 states and 136729 transitions. [2022-07-22 12:33:20,557 INFO L78 Accepts]: Start accepts. Automaton has 122473 states and 136729 transitions. Word has length 452 [2022-07-22 12:33:20,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:20,558 INFO L495 AbstractCegarLoop]: Abstraction has 122473 states and 136729 transitions. [2022-07-22 12:33:20,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.33333333333333) internal successors, (340), 3 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:20,558 INFO L276 IsEmpty]: Start isEmpty. Operand 122473 states and 136729 transitions. [2022-07-22 12:33:20,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-22 12:33:20,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:20,568 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:20,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 12:33:20,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-22 12:33:20,771 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:20,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:20,771 INFO L85 PathProgramCache]: Analyzing trace with hash -361499736, now seen corresponding path program 1 times [2022-07-22 12:33:20,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:20,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881994270] [2022-07-22 12:33:20,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:20,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 664 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-22 12:33:20,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:20,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881994270] [2022-07-22 12:33:20,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881994270] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:20,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:20,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:20,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580194454] [2022-07-22 12:33:20,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:20,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:20,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:20,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:20,989 INFO L87 Difference]: Start difference. First operand 122473 states and 136729 transitions. Second operand has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:25,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:25,278 INFO L93 Difference]: Finished difference Result 266986 states and 299855 transitions. [2022-07-22 12:33:25,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:25,279 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 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 470 [2022-07-22 12:33:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:25,507 INFO L225 Difference]: With dead ends: 266986 [2022-07-22 12:33:25,507 INFO L226 Difference]: Without dead ends: 145302 [2022-07-22 12:33:25,568 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 [2022-07-22 12:33:25,568 INFO L413 NwaCegarLoop]: 1755 mSDtfsCounter, 723 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 1899 SdHoareTripleChecker+Invalid, 3214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:25,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [723 Valid, 1899 Invalid, 3214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:33:25,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145302 states. [2022-07-22 12:33:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145302 to 141346. [2022-07-22 12:33:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141346 states, 141345 states have (on average 1.101213343238176) internal successors, (155651), 141345 states have internal predecessors, (155651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:27,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141346 states to 141346 states and 155651 transitions. [2022-07-22 12:33:27,356 INFO L78 Accepts]: Start accepts. Automaton has 141346 states and 155651 transitions. Word has length 470 [2022-07-22 12:33:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:27,357 INFO L495 AbstractCegarLoop]: Abstraction has 141346 states and 155651 transitions. [2022-07-22 12:33:27,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.0) internal successors, (288), 3 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:27,357 INFO L276 IsEmpty]: Start isEmpty. Operand 141346 states and 155651 transitions. [2022-07-22 12:33:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 584 [2022-07-22 12:33:27,381 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:27,381 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:27,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 12:33:27,381 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:27,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:27,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1002493065, now seen corresponding path program 1 times [2022-07-22 12:33:27,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:27,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340823736] [2022-07-22 12:33:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:27,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 351 proven. 110 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-22 12:33:27,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340823736] [2022-07-22 12:33:27,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340823736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:27,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739806139] [2022-07-22 12:33:27,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:27,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:27,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:27,822 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) [2022-07-22 12:33:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 12:33:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:28,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:33:28,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:29,454 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 337 proven. 0 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 12:33:29,454 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:29,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739806139] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:29,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:29,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-22 12:33:29,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720335336] [2022-07-22 12:33:29,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:29,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:29,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:29,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:29,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:33:29,457 INFO L87 Difference]: Start difference. First operand 141346 states and 155651 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:32,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:32,773 INFO L93 Difference]: Finished difference Result 267743 states and 295781 transitions. [2022-07-22 12:33:32,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:32,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 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 583 [2022-07-22 12:33:32,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:32,941 INFO L225 Difference]: With dead ends: 267743 [2022-07-22 12:33:32,942 INFO L226 Difference]: Without dead ends: 145296 [2022-07-22 12:33:33,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 582 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-07-22 12:33:33,008 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 544 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2448 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 1142 SdHoareTripleChecker+Invalid, 2557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:33,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 1142 Invalid, 2557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2448 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-22 12:33:33,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145296 states. [2022-07-22 12:33:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145296 to 145287. [2022-07-22 12:33:34,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145287 states, 145286 states have (on average 1.099534710846193) internal successors, (159747), 145286 states have internal predecessors, (159747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145287 states to 145287 states and 159747 transitions. [2022-07-22 12:33:34,933 INFO L78 Accepts]: Start accepts. Automaton has 145287 states and 159747 transitions. Word has length 583 [2022-07-22 12:33:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:34,933 INFO L495 AbstractCegarLoop]: Abstraction has 145287 states and 159747 transitions. [2022-07-22 12:33:34,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 2 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 145287 states and 159747 transitions. [2022-07-22 12:33:34,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 637 [2022-07-22 12:33:34,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:34,962 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:34,979 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 12:33:35,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:35,163 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:35,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:35,163 INFO L85 PathProgramCache]: Analyzing trace with hash 527317633, now seen corresponding path program 1 times [2022-07-22 12:33:35,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:35,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518487191] [2022-07-22 12:33:35,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:35,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:35,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:35,363 INFO L134 CoverageAnalysis]: Checked inductivity of 674 backedges. 531 proven. 0 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-07-22 12:33:35,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:35,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518487191] [2022-07-22 12:33:35,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518487191] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:35,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:35,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162351374] [2022-07-22 12:33:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:35,366 INFO L87 Difference]: Start difference. First operand 145287 states and 159747 transitions. Second operand has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:39,522 INFO L93 Difference]: Finished difference Result 299991 states and 329054 transitions. [2022-07-22 12:33:39,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 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 636 [2022-07-22 12:33:39,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:39,742 INFO L225 Difference]: With dead ends: 299991 [2022-07-22 12:33:39,743 INFO L226 Difference]: Without dead ends: 149194 [2022-07-22 12:33:39,815 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 [2022-07-22 12:33:39,820 INFO L413 NwaCegarLoop]: 1477 mSDtfsCounter, 1007 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2326 mSolverCounterSat, 594 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1007 SdHoareTripleChecker+Valid, 1606 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 594 IncrementalHoareTripleChecker+Valid, 2326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:39,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1007 Valid, 1606 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [594 Valid, 2326 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-22 12:33:39,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149194 states. [2022-07-22 12:33:41,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149194 to 145248. [2022-07-22 12:33:41,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145248 states, 145247 states have (on average 1.0618257175707588) internal successors, (154227), 145247 states have internal predecessors, (154227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:41,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145248 states to 145248 states and 154227 transitions. [2022-07-22 12:33:41,913 INFO L78 Accepts]: Start accepts. Automaton has 145248 states and 154227 transitions. Word has length 636 [2022-07-22 12:33:41,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:41,913 INFO L495 AbstractCegarLoop]: Abstraction has 145248 states and 154227 transitions. [2022-07-22 12:33:41,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 171.66666666666666) internal successors, (515), 3 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:41,914 INFO L276 IsEmpty]: Start isEmpty. Operand 145248 states and 154227 transitions. [2022-07-22 12:33:41,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 717 [2022-07-22 12:33:41,946 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:41,947 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:41,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 12:33:41,947 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:41,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:41,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1565889803, now seen corresponding path program 1 times [2022-07-22 12:33:41,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:41,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514066264] [2022-07-22 12:33:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:41,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:42,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 789 proven. 75 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-22 12:33:42,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:42,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514066264] [2022-07-22 12:33:42,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514066264] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 12:33:42,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908510245] [2022-07-22 12:33:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 12:33:42,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 12:33:42,315 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) [2022-07-22 12:33:42,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 12:33:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:42,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 916 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-22 12:33:42,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 12:33:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1020 backedges. 927 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-07-22 12:33:43,551 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-22 12:33:43,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908510245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:43,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-22 12:33:43,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-07-22 12:33:43,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647744768] [2022-07-22 12:33:43,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:43,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:33:43,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:43,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:33:43,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:33:43,553 INFO L87 Difference]: Start difference. First operand 145248 states and 154227 transitions. Second operand has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:47,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:47,527 INFO L93 Difference]: Finished difference Result 276324 states and 294193 transitions. [2022-07-22 12:33:47,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 12:33:47,527 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 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 716 [2022-07-22 12:33:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:47,719 INFO L225 Difference]: With dead ends: 276324 [2022-07-22 12:33:47,719 INFO L226 Difference]: Without dead ends: 149186 [2022-07-22 12:33:48,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 719 GetRequests, 715 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-22 12:33:48,113 INFO L413 NwaCegarLoop]: 617 mSDtfsCounter, 2404 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 3236 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2404 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 3236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:48,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2404 Valid, 776 Invalid, 3815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 3236 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-22 12:33:48,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149186 states. [2022-07-22 12:33:49,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149186 to 146816. [2022-07-22 12:33:49,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146816 states, 146815 states have (on average 1.0613356945816164) internal successors, (155820), 146815 states have internal predecessors, (155820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:49,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146816 states to 146816 states and 155820 transitions. [2022-07-22 12:33:49,641 INFO L78 Accepts]: Start accepts. Automaton has 146816 states and 155820 transitions. Word has length 716 [2022-07-22 12:33:49,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:49,642 INFO L495 AbstractCegarLoop]: Abstraction has 146816 states and 155820 transitions. [2022-07-22 12:33:49,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 156.25) internal successors, (625), 4 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:49,642 INFO L276 IsEmpty]: Start isEmpty. Operand 146816 states and 155820 transitions. [2022-07-22 12:33:49,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 766 [2022-07-22 12:33:49,678 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:49,679 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:49,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 12:33:49,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 12:33:49,896 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:49,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2058570688, now seen corresponding path program 1 times [2022-07-22 12:33:49,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:49,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639283440] [2022-07-22 12:33:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:49,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:50,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:50,596 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-07-22 12:33:50,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:50,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639283440] [2022-07-22 12:33:50,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639283440] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:50,597 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:50,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 12:33:50,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096703454] [2022-07-22 12:33:50,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:50,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 12:33:50,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 12:33:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 12:33:50,599 INFO L87 Difference]: Start difference. First operand 146816 states and 155820 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 12:33:55,299 INFO L93 Difference]: Finished difference Result 328350 states and 349046 transitions. [2022-07-22 12:33:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 12:33:55,300 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 765 [2022-07-22 12:33:55,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 12:33:55,541 INFO L225 Difference]: With dead ends: 328350 [2022-07-22 12:33:55,541 INFO L226 Difference]: Without dead ends: 182323 [2022-07-22 12:33:55,620 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 [2022-07-22 12:33:55,620 INFO L413 NwaCegarLoop]: 1677 mSDtfsCounter, 866 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 866 SdHoareTripleChecker+Valid, 1804 SdHoareTripleChecker+Invalid, 3393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-07-22 12:33:55,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [866 Valid, 1804 Invalid, 3393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-07-22 12:33:55,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182323 states. [2022-07-22 12:33:57,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182323 to 179134. [2022-07-22 12:33:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179134 states, 179133 states have (on average 1.0588389632284392) internal successors, (189673), 179133 states have internal predecessors, (189673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:58,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179134 states to 179134 states and 189673 transitions. [2022-07-22 12:33:58,038 INFO L78 Accepts]: Start accepts. Automaton has 179134 states and 189673 transitions. Word has length 765 [2022-07-22 12:33:58,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 12:33:58,038 INFO L495 AbstractCegarLoop]: Abstraction has 179134 states and 189673 transitions. [2022-07-22 12:33:58,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 12:33:58,038 INFO L276 IsEmpty]: Start isEmpty. Operand 179134 states and 189673 transitions. [2022-07-22 12:33:58,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 775 [2022-07-22 12:33:58,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 12:33:58,075 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 12:33:58,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 12:33:58,075 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 12:33:58,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 12:33:58,076 INFO L85 PathProgramCache]: Analyzing trace with hash 882548185, now seen corresponding path program 1 times [2022-07-22 12:33:58,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 12:33:58,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197006387] [2022-07-22 12:33:58,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 12:33:58,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 12:33:58,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 12:33:58,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1171 backedges. 869 proven. 0 refuted. 0 times theorem prover too weak. 302 trivial. 0 not checked. [2022-07-22 12:33:58,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 12:33:58,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197006387] [2022-07-22 12:33:58,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197006387] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 12:33:58,346 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 12:33:58,346 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 12:33:58,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181099211] [2022-07-22 12:33:58,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 12:33:58,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 12:33:58,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 12:33:58,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 12:33:58,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 12:33:58,348 INFO L87 Difference]: Start difference. First operand 179134 states and 189673 transitions. Second operand has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)