./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label28.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label28.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 484926faa58a404dd95f955e93679d6ad13b338cc4627616c79e80f48803476c --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 12:19:50,880 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 12:19:50,881 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 12:19:50,923 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 12:19:50,924 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 12:19:50,925 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 12:19:50,927 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 12:19:50,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 12:19:50,931 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 12:19:50,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 12:19:50,937 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 12:19:50,939 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 12:19:50,939 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 12:19:50,941 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 12:19:50,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 12:19:50,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 12:19:50,947 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 12:19:50,948 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 12:19:50,949 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 12:19:50,955 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 12:19:50,956 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 12:19:50,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 12:19:50,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 12:19:50,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 12:19:50,961 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 12:19:50,964 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 12:19:50,964 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 12:19:50,965 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 12:19:50,966 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 12:19:50,966 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 12:19:50,968 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 12:19:50,969 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 12:19:50,970 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 12:19:50,971 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 12:19:50,971 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 12:19:50,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 12:19:50,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 12:19:50,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 12:19:50,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 12:19:50,973 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 12:19:50,974 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 12:19:50,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 12:19:50,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 12:19:51,020 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 12:19:51,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 12:19:51,021 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 12:19:51,021 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 12:19:51,024 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 12:19:51,024 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 12:19:51,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 12:19:51,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 12:19:51,025 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 12:19:51,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 12:19:51,026 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 12:19:51,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 12:19:51,028 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 12:19:51,028 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 12:19:51,029 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 12:19:51,029 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 12:19:51,029 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 12:19:51,030 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 12:19:51,030 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 12:19:51,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:19:51,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 12:19:51,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 12:19:51,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 12:19:51,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 12:19:51,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 12:19:51,031 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 12:19:51,031 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 12:19:51,032 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 12:19:51,032 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 484926faa58a404dd95f955e93679d6ad13b338cc4627616c79e80f48803476c [2022-07-19 12:19:51,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 12:19:51,320 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 12:19:51,322 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 12:19:51,323 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 12:19:51,324 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 12:19:51,325 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2022-07-19 12:19:51,378 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d3b2a988/ed1db277d4674c59907d41a7ac94583c/FLAG649196c93 [2022-07-19 12:19:52,161 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 12:19:52,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label28.c [2022-07-19 12:19:52,187 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d3b2a988/ed1db277d4674c59907d41a7ac94583c/FLAG649196c93 [2022-07-19 12:19:52,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7d3b2a988/ed1db277d4674c59907d41a7ac94583c [2022-07-19 12:19:52,233 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 12:19:52,235 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 12:19:52,237 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 12:19:52,237 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 12:19:52,240 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 12:19:52,241 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:19:52" (1/1) ... [2022-07-19 12:19:52,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f14e1dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:52, skipping insertion in model container [2022-07-19 12:19:52,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 12:19:52" (1/1) ... [2022-07-19 12:19:52,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 12:19:52,368 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 12:19:52,600 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_label28.c[2473,2486] [2022-07-19 12:19:53,379 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:19:53,386 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 12:19:53,411 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_label28.c[2473,2486] [2022-07-19 12:19:53,909 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 12:19:53,955 INFO L208 MainTranslator]: Completed translation [2022-07-19 12:19:53,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53 WrapperNode [2022-07-19 12:19:53,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 12:19:53,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 12:19:53,958 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 12:19:53,958 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 12:19:53,965 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:54,041 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:54,655 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-19 12:19:54,656 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 12:19:54,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 12:19:54,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 12:19:54,658 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 12:19:54,665 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:54,665 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:54,866 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:54,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:55,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:55,194 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:55,277 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:55,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 12:19:55,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 12:19:55,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 12:19:55,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 12:19:55,405 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (1/1) ... [2022-07-19 12:19:55,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 12:19:55,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:19:55,560 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 12:19:55,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 12:19:55,634 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 12:19:55,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 12:19:55,635 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 12:19:55,635 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 12:19:55,759 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 12:19:55,773 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 12:20:01,616 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 12:20:01,645 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 12:20:01,645 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 12:20:01,653 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:20:01 BoogieIcfgContainer [2022-07-19 12:20:01,654 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 12:20:01,660 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 12:20:01,661 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 12:20:01,670 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 12:20:01,671 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 12:19:52" (1/3) ... [2022-07-19 12:20:01,671 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53af8a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:20:01, skipping insertion in model container [2022-07-19 12:20:01,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 12:19:53" (2/3) ... [2022-07-19 12:20:01,672 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53af8a33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 12:20:01, skipping insertion in model container [2022-07-19 12:20:01,672 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 12:20:01" (3/3) ... [2022-07-19 12:20:01,673 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label28.c [2022-07-19 12:20:01,712 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 12:20:01,712 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 12:20:01,834 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 12:20:01,856 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@10c74b67, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7c1292a2 [2022-07-19 12:20:01,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 12:20:01,869 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) [2022-07-19 12:20:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-19 12:20:01,875 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:01,875 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:01,876 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:01,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:01,885 INFO L85 PathProgramCache]: Analyzing trace with hash -884752143, now seen corresponding path program 1 times [2022-07-19 12:20:01,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:01,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287282162] [2022-07-19 12:20:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:01,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:02,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:02,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287282162] [2022-07-19 12:20:02,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287282162] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:02,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:02,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:02,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931280163] [2022-07-19 12:20:02,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:02,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:02,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:02,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:02,357 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:07,637 INFO L93 Difference]: Finished difference Result 3082 states and 5689 transitions. [2022-07-19 12:20:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:07,639 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2022-07-19 12:20:07,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:07,670 INFO L225 Difference]: With dead ends: 3082 [2022-07-19 12:20:07,670 INFO L226 Difference]: Without dead ends: 1899 [2022-07-19 12:20:07,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:07,692 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 1024 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 2955 mSolverCounterSat, 599 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 3554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 599 IncrementalHoareTripleChecker+Valid, 2955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:07,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1024 Valid, 641 Invalid, 3554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [599 Valid, 2955 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-07-19 12:20:07,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1899 states. [2022-07-19 12:20:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1899 to 1894. [2022-07-19 12:20:07,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1894 states, 1893 states have (on average 1.7374537770734284) internal successors, (3289), 1893 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:07,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1894 states to 1894 states and 3289 transitions. [2022-07-19 12:20:07,879 INFO L78 Accepts]: Start accepts. Automaton has 1894 states and 3289 transitions. Word has length 15 [2022-07-19 12:20:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:07,883 INFO L495 AbstractCegarLoop]: Abstraction has 1894 states and 3289 transitions. [2022-07-19 12:20:07,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1894 states and 3289 transitions. [2022-07-19 12:20:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-07-19 12:20:07,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:07,886 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:07,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 12:20:07,887 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:07,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:07,889 INFO L85 PathProgramCache]: Analyzing trace with hash 719746634, now seen corresponding path program 1 times [2022-07-19 12:20:07,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:07,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957212176] [2022-07-19 12:20:07,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:07,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:08,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957212176] [2022-07-19 12:20:08,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957212176] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:08,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:08,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:08,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286401676] [2022-07-19 12:20:08,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:08,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:08,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:08,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:08,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:08,070 INFO L87 Difference]: Start difference. First operand 1894 states and 3289 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:11,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:11,819 INFO L93 Difference]: Finished difference Result 5384 states and 9441 transitions. [2022-07-19 12:20:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:11,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2022-07-19 12:20:11,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:11,838 INFO L225 Difference]: With dead ends: 5384 [2022-07-19 12:20:11,839 INFO L226 Difference]: Without dead ends: 3492 [2022-07-19 12:20:11,843 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:11,844 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 922 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2310 mSolverCounterSat, 879 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 922 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 3189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 879 IncrementalHoareTripleChecker+Valid, 2310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:11,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [922 Valid, 1013 Invalid, 3189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [879 Valid, 2310 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-19 12:20:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3492 states. [2022-07-19 12:20:11,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3492 to 3491. [2022-07-19 12:20:11,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 1.5383954154727795) internal successors, (5369), 3490 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 5369 transitions. [2022-07-19 12:20:11,920 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 5369 transitions. Word has length 80 [2022-07-19 12:20:11,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:11,922 INFO L495 AbstractCegarLoop]: Abstraction has 3491 states and 5369 transitions. [2022-07-19 12:20:11,922 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:11,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 5369 transitions. [2022-07-19 12:20:11,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-07-19 12:20:11,927 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:11,927 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:11,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 12:20:11,930 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:11,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:11,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1405100497, now seen corresponding path program 1 times [2022-07-19 12:20:11,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:11,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372454934] [2022-07-19 12:20:11,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:11,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:11,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:12,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:12,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:12,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372454934] [2022-07-19 12:20:12,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372454934] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:12,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:12,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230125002] [2022-07-19 12:20:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:12,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:12,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:12,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:12,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:12,074 INFO L87 Difference]: Start difference. First operand 3491 states and 5369 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:15,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:15,958 INFO L93 Difference]: Finished difference Result 10169 states and 15700 transitions. [2022-07-19 12:20:15,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:15,958 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 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 82 [2022-07-19 12:20:15,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:15,982 INFO L225 Difference]: With dead ends: 10169 [2022-07-19 12:20:15,983 INFO L226 Difference]: Without dead ends: 6680 [2022-07-19 12:20:15,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:15,993 INFO L413 NwaCegarLoop]: 714 mSDtfsCounter, 977 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2533 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 847 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:15,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [977 Valid, 847 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2533 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-07-19 12:20:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6680 states. [2022-07-19 12:20:16,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6680 to 6669. [2022-07-19 12:20:16,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6669 states, 6668 states have (on average 1.375224955008998) internal successors, (9170), 6668 states have internal predecessors, (9170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:16,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6669 states to 6669 states and 9170 transitions. [2022-07-19 12:20:16,208 INFO L78 Accepts]: Start accepts. Automaton has 6669 states and 9170 transitions. Word has length 82 [2022-07-19 12:20:16,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:16,210 INFO L495 AbstractCegarLoop]: Abstraction has 6669 states and 9170 transitions. [2022-07-19 12:20:16,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:16,210 INFO L276 IsEmpty]: Start isEmpty. Operand 6669 states and 9170 transitions. [2022-07-19 12:20:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-07-19 12:20:16,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:16,217 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:16,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 12:20:16,218 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash -770747971, now seen corresponding path program 1 times [2022-07-19 12:20:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:16,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909824455] [2022-07-19 12:20:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:16,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:16,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909824455] [2022-07-19 12:20:16,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909824455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:16,350 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:16,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:16,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86796041] [2022-07-19 12:20:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:16,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:16,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:16,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:16,352 INFO L87 Difference]: Start difference. First operand 6669 states and 9170 transitions. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:20,120 INFO L93 Difference]: Finished difference Result 19656 states and 27046 transitions. [2022-07-19 12:20:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:20,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 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 126 [2022-07-19 12:20:20,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:20,170 INFO L225 Difference]: With dead ends: 19656 [2022-07-19 12:20:20,171 INFO L226 Difference]: Without dead ends: 12989 [2022-07-19 12:20:20,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:20,199 INFO L413 NwaCegarLoop]: 1000 mSDtfsCounter, 853 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 853 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 793 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:20,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [853 Valid, 1151 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [793 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-07-19 12:20:20,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12989 states. [2022-07-19 12:20:20,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12989 to 12972. [2022-07-19 12:20:20,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2366818286947807) internal successors, (16041), 12971 states have internal predecessors, (16041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:20,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16041 transitions. [2022-07-19 12:20:20,475 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16041 transitions. Word has length 126 [2022-07-19 12:20:20,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:20,477 INFO L495 AbstractCegarLoop]: Abstraction has 12972 states and 16041 transitions. [2022-07-19 12:20:20,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16041 transitions. [2022-07-19 12:20:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-19 12:20:20,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:20,480 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:20,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 12:20:20,481 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:20,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:20,481 INFO L85 PathProgramCache]: Analyzing trace with hash -741796308, now seen corresponding path program 1 times [2022-07-19 12:20:20,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:20,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649902870] [2022-07-19 12:20:20,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:20,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:20,624 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:20,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:20,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649902870] [2022-07-19 12:20:20,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649902870] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:20,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:20,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:20,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452934815] [2022-07-19 12:20:20,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:20,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:20,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:20,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:20,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:20,628 INFO L87 Difference]: Start difference. First operand 12972 states and 16041 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:23,958 INFO L93 Difference]: Finished difference Result 22792 states and 28661 transitions. [2022-07-19 12:20:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:23,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2022-07-19 12:20:23,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:23,992 INFO L225 Difference]: With dead ends: 22792 [2022-07-19 12:20:23,992 INFO L226 Difference]: Without dead ends: 12980 [2022-07-19 12:20:24,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:24,003 INFO L413 NwaCegarLoop]: 1028 mSDtfsCounter, 730 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:24,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [730 Valid, 1212 Invalid, 2718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:20:24,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12980 states. [2022-07-19 12:20:24,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12980 to 12972. [2022-07-19 12:20:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12972 states, 12971 states have (on average 1.2351399275306454) internal successors, (16021), 12971 states have internal predecessors, (16021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12972 states to 12972 states and 16021 transitions. [2022-07-19 12:20:24,191 INFO L78 Accepts]: Start accepts. Automaton has 12972 states and 16021 transitions. Word has length 131 [2022-07-19 12:20:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:24,193 INFO L495 AbstractCegarLoop]: Abstraction has 12972 states and 16021 transitions. [2022-07-19 12:20:24,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 12972 states and 16021 transitions. [2022-07-19 12:20:24,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-07-19 12:20:24,199 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:24,199 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:24,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 12:20:24,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:24,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:24,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1937391824, now seen corresponding path program 1 times [2022-07-19 12:20:24,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:24,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649741714] [2022-07-19 12:20:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:24,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:24,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:24,338 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 12:20:24,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:24,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649741714] [2022-07-19 12:20:24,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649741714] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:24,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:24,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:24,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134186632] [2022-07-19 12:20:24,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:24,341 INFO L87 Difference]: Start difference. First operand 12972 states and 16021 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:27,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:27,485 INFO L93 Difference]: Finished difference Result 36166 states and 45139 transitions. [2022-07-19 12:20:27,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:27,492 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 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 229 [2022-07-19 12:20:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:27,539 INFO L225 Difference]: With dead ends: 36166 [2022-07-19 12:20:27,539 INFO L226 Difference]: Without dead ends: 23196 [2022-07-19 12:20:27,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:27,562 INFO L413 NwaCegarLoop]: 1850 mSDtfsCounter, 841 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:27,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [841 Valid, 1988 Invalid, 3286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:20:27,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23196 states. [2022-07-19 12:20:27,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23196 to 22404. [2022-07-19 12:20:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22404 states, 22403 states have (on average 1.1934115966611614) internal successors, (26736), 22403 states have internal predecessors, (26736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22404 states to 22404 states and 26736 transitions. [2022-07-19 12:20:27,860 INFO L78 Accepts]: Start accepts. Automaton has 22404 states and 26736 transitions. Word has length 229 [2022-07-19 12:20:27,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:27,861 INFO L495 AbstractCegarLoop]: Abstraction has 22404 states and 26736 transitions. [2022-07-19 12:20:27,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:27,861 INFO L276 IsEmpty]: Start isEmpty. Operand 22404 states and 26736 transitions. [2022-07-19 12:20:27,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-07-19 12:20:27,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:27,870 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:20:27,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 12:20:27,871 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:27,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash -142749065, now seen corresponding path program 1 times [2022-07-19 12:20:27,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:27,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656616215] [2022-07-19 12:20:27,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:27,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-07-19 12:20:27,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:27,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656616215] [2022-07-19 12:20:27,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656616215] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:27,981 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:27,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:20:27,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915069298] [2022-07-19 12:20:27,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:27,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:27,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:27,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:27,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:27,983 INFO L87 Difference]: Start difference. First operand 22404 states and 26736 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:31,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:31,344 INFO L93 Difference]: Finished difference Result 44019 states and 52673 transitions. [2022-07-19 12:20:31,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:31,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 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 244 [2022-07-19 12:20:31,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:31,432 INFO L225 Difference]: With dead ends: 44019 [2022-07-19 12:20:31,432 INFO L226 Difference]: Without dead ends: 22404 [2022-07-19 12:20:31,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:31,455 INFO L413 NwaCegarLoop]: 1067 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2504 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 1196 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2504 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:20:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22404 states. [2022-07-19 12:20:31,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22404 to 22404. [2022-07-19 12:20:31,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22404 states, 22403 states have (on average 1.1931884122662144) internal successors, (26731), 22403 states have internal predecessors, (26731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22404 states to 22404 states and 26731 transitions. [2022-07-19 12:20:31,731 INFO L78 Accepts]: Start accepts. Automaton has 22404 states and 26731 transitions. Word has length 244 [2022-07-19 12:20:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:31,731 INFO L495 AbstractCegarLoop]: Abstraction has 22404 states and 26731 transitions. [2022-07-19 12:20:31,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:31,732 INFO L276 IsEmpty]: Start isEmpty. Operand 22404 states and 26731 transitions. [2022-07-19 12:20:31,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-07-19 12:20:31,735 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:31,735 INFO L195 NwaCegarLoop]: trace histogram [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, 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] [2022-07-19 12:20:31,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 12:20:31,736 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:31,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:31,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1521446496, now seen corresponding path program 1 times [2022-07-19 12:20:31,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:31,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392613155] [2022-07-19 12:20:31,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:31,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:31,858 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 230 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 12:20:31,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:31,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392613155] [2022-07-19 12:20:31,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392613155] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:31,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:31,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:31,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935243907] [2022-07-19 12:20:31,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:31,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:31,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:31,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:31,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:31,860 INFO L87 Difference]: Start difference. First operand 22404 states and 26731 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:35,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:35,587 INFO L93 Difference]: Finished difference Result 55046 states and 66948 transitions. [2022-07-19 12:20:35,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:35,588 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 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 251 [2022-07-19 12:20:35,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:35,642 INFO L225 Difference]: With dead ends: 55046 [2022-07-19 12:20:35,642 INFO L226 Difference]: Without dead ends: 33431 [2022-07-19 12:20:35,668 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:35,669 INFO L413 NwaCegarLoop]: 810 mSDtfsCounter, 882 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 903 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 882 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 903 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:35,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [882 Valid, 928 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [903 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-19 12:20:35,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33431 states. [2022-07-19 12:20:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33431 to 32635. [2022-07-19 12:20:36,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32635 states, 32634 states have (on average 1.176135318992462) internal successors, (38382), 32634 states have internal predecessors, (38382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:36,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32635 states to 32635 states and 38382 transitions. [2022-07-19 12:20:36,242 INFO L78 Accepts]: Start accepts. Automaton has 32635 states and 38382 transitions. Word has length 251 [2022-07-19 12:20:36,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:36,243 INFO L495 AbstractCegarLoop]: Abstraction has 32635 states and 38382 transitions. [2022-07-19 12:20:36,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32635 states and 38382 transitions. [2022-07-19 12:20:36,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-19 12:20:36,248 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:36,249 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:20:36,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 12:20:36,250 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:36,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:36,251 INFO L85 PathProgramCache]: Analyzing trace with hash -406385595, now seen corresponding path program 1 times [2022-07-19 12:20:36,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:36,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856435110] [2022-07-19 12:20:36,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:36,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:36,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:36,419 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-19 12:20:36,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:36,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856435110] [2022-07-19 12:20:36,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856435110] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:36,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:36,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:36,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577362807] [2022-07-19 12:20:36,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:36,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:36,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:36,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:36,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:36,423 INFO L87 Difference]: Start difference. First operand 32635 states and 38382 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:39,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:39,847 INFO L93 Difference]: Finished difference Result 76294 states and 91193 transitions. [2022-07-19 12:20:39,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:39,848 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 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 306 [2022-07-19 12:20:39,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:39,901 INFO L225 Difference]: With dead ends: 76294 [2022-07-19 12:20:39,901 INFO L226 Difference]: Without dead ends: 44448 [2022-07-19 12:20:39,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:39,927 INFO L413 NwaCegarLoop]: 1806 mSDtfsCounter, 849 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 2550 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 849 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:39,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [849 Valid, 1950 Invalid, 3273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2550 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-19 12:20:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44448 states. [2022-07-19 12:20:40,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44448 to 43657. [2022-07-19 12:20:40,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43657 states, 43656 states have (on average 1.151663001649258) internal successors, (50277), 43656 states have internal predecessors, (50277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43657 states to 43657 states and 50277 transitions. [2022-07-19 12:20:40,416 INFO L78 Accepts]: Start accepts. Automaton has 43657 states and 50277 transitions. Word has length 306 [2022-07-19 12:20:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:40,417 INFO L495 AbstractCegarLoop]: Abstraction has 43657 states and 50277 transitions. [2022-07-19 12:20:40,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 43657 states and 50277 transitions. [2022-07-19 12:20:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2022-07-19 12:20:40,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:40,423 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 12:20:40,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 12:20:40,424 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:40,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:40,424 INFO L85 PathProgramCache]: Analyzing trace with hash 624236473, now seen corresponding path program 1 times [2022-07-19 12:20:40,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:40,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467232408] [2022-07-19 12:20:40,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:40,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:40,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 154 proven. 113 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 12:20:40,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467232408] [2022-07-19 12:20:40,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467232408] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:20:40,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132102755] [2022-07-19 12:20:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:40,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:20:40,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:20:40,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:20:40,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 12:20:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:40,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 12:20:40,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:20:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 12:20:41,035 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:20:41,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132102755] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:41,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:20:41,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-19 12:20:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704944525] [2022-07-19 12:20:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:41,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:41,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:41,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:41,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:20:41,038 INFO L87 Difference]: Start difference. First operand 43657 states and 50277 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:44,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:44,455 INFO L93 Difference]: Finished difference Result 86516 states and 99752 transitions. [2022-07-19 12:20:44,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:44,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 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 321 [2022-07-19 12:20:44,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:44,515 INFO L225 Difference]: With dead ends: 86516 [2022-07-19 12:20:44,515 INFO L226 Difference]: Without dead ends: 43648 [2022-07-19 12:20:44,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:20:44,555 INFO L413 NwaCegarLoop]: 689 mSDtfsCounter, 1076 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 818 SdHoareTripleChecker+Invalid, 2922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:44,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1076 Valid, 818 Invalid, 2922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-19 12:20:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43648 states. [2022-07-19 12:20:45,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43648 to 43647. [2022-07-19 12:20:45,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43647 states, 43646 states have (on average 1.1132749851074555) internal successors, (48590), 43646 states have internal predecessors, (48590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:45,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43647 states to 43647 states and 48590 transitions. [2022-07-19 12:20:45,226 INFO L78 Accepts]: Start accepts. Automaton has 43647 states and 48590 transitions. Word has length 321 [2022-07-19 12:20:45,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:45,227 INFO L495 AbstractCegarLoop]: Abstraction has 43647 states and 48590 transitions. [2022-07-19 12:20:45,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 3 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 43647 states and 48590 transitions. [2022-07-19 12:20:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2022-07-19 12:20:45,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:45,251 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:45,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 12:20:45,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 12:20:45,452 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:45,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1590721991, now seen corresponding path program 1 times [2022-07-19 12:20:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3069425] [2022-07-19 12:20:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:45,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:45,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2022-07-19 12:20:45,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:45,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3069425] [2022-07-19 12:20:45,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3069425] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:45,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:45,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:45,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565422189] [2022-07-19 12:20:45,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:45,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:45,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:45,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:45,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:45,687 INFO L87 Difference]: Start difference. First operand 43647 states and 48590 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:49,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:49,218 INFO L93 Difference]: Finished difference Result 86503 states and 96385 transitions. [2022-07-19 12:20:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:20:49,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 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 340 [2022-07-19 12:20:49,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:49,275 INFO L225 Difference]: With dead ends: 86503 [2022-07-19 12:20:49,276 INFO L226 Difference]: Without dead ends: 43645 [2022-07-19 12:20:49,306 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:20:49,314 INFO L413 NwaCegarLoop]: 1342 mSDtfsCounter, 1187 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 2907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:49,315 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1187 Valid, 1421 Invalid, 2907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:20:49,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43645 states. [2022-07-19 12:20:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43645 to 43644. [2022-07-19 12:20:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43644 states, 43643 states have (on average 1.086588914602571) internal successors, (47422), 43643 states have internal predecessors, (47422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43644 states to 43644 states and 47422 transitions. [2022-07-19 12:20:49,958 INFO L78 Accepts]: Start accepts. Automaton has 43644 states and 47422 transitions. Word has length 340 [2022-07-19 12:20:49,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:49,959 INFO L495 AbstractCegarLoop]: Abstraction has 43644 states and 47422 transitions. [2022-07-19 12:20:49,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:49,959 INFO L276 IsEmpty]: Start isEmpty. Operand 43644 states and 47422 transitions. [2022-07-19 12:20:49,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-07-19 12:20:49,987 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:49,987 INFO L195 NwaCegarLoop]: trace histogram [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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:49,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 12:20:49,988 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:49,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:49,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1684613318, now seen corresponding path program 1 times [2022-07-19 12:20:49,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:49,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220168531] [2022-07-19 12:20:49,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:49,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:50,208 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 12:20:50,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:50,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220168531] [2022-07-19 12:20:50,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220168531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:50,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:20:50,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:20:50,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614783893] [2022-07-19 12:20:50,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:50,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:20:50,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:50,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:20:50,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:20:50,211 INFO L87 Difference]: Start difference. First operand 43644 states and 47422 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:20:56,773 INFO L93 Difference]: Finished difference Result 150460 states and 163810 transitions. [2022-07-19 12:20:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:20:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 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 363 [2022-07-19 12:20:56,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:20:56,919 INFO L225 Difference]: With dead ends: 150460 [2022-07-19 12:20:56,920 INFO L226 Difference]: Without dead ends: 107605 [2022-07-19 12:20:56,957 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 [2022-07-19 12:20:56,958 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 1714 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 6004 mSolverCounterSat, 1095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 7099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1095 IncrementalHoareTripleChecker+Valid, 6004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:20:56,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 755 Invalid, 7099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1095 Valid, 6004 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 12:20:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107605 states. [2022-07-19 12:20:58,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107605 to 104326. [2022-07-19 12:20:58,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104326 states, 104325 states have (on average 1.0794344596213754) internal successors, (112612), 104325 states have internal predecessors, (112612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:58,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104326 states to 104326 states and 112612 transitions. [2022-07-19 12:20:58,363 INFO L78 Accepts]: Start accepts. Automaton has 104326 states and 112612 transitions. Word has length 363 [2022-07-19 12:20:58,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:20:58,364 INFO L495 AbstractCegarLoop]: Abstraction has 104326 states and 112612 transitions. [2022-07-19 12:20:58,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:20:58,364 INFO L276 IsEmpty]: Start isEmpty. Operand 104326 states and 112612 transitions. [2022-07-19 12:20:58,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-07-19 12:20:58,370 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:20:58,371 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:20:58,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 12:20:58,371 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:20:58,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:20:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1234351376, now seen corresponding path program 1 times [2022-07-19 12:20:58,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:20:58,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307223169] [2022-07-19 12:20:58,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:58,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:20:58,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 323 proven. 113 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-07-19 12:20:58,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:20:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307223169] [2022-07-19 12:20:58,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307223169] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 12:20:58,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035811940] [2022-07-19 12:20:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:20:58,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 12:20:58,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 12:20:58,954 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 12:20:58,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 12:20:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:20:59,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 12:20:59,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 12:20:59,829 INFO L134 CoverageAnalysis]: Checked inductivity of 527 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-19 12:20:59,829 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 12:20:59,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035811940] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:20:59,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 12:20:59,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-19 12:20:59,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371847707] [2022-07-19 12:20:59,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:20:59,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:20:59,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:20:59,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:20:59,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:20:59,831 INFO L87 Difference]: Start difference. First operand 104326 states and 112612 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:02,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:02,849 INFO L93 Difference]: Finished difference Result 202358 states and 218743 transitions. [2022-07-19 12:21:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2022-07-19 12:21:02,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:03,112 INFO L225 Difference]: With dead ends: 202358 [2022-07-19 12:21:03,112 INFO L226 Difference]: Without dead ends: 108272 [2022-07-19 12:21:03,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 405 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-19 12:21:03,144 INFO L413 NwaCegarLoop]: 1033 mSDtfsCounter, 683 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 1167 SdHoareTripleChecker+Invalid, 2575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:03,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [683 Valid, 1167 Invalid, 2575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-19 12:21:03,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108272 states. [2022-07-19 12:21:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108272 to 106688. [2022-07-19 12:21:04,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106688 states, 106687 states have (on average 1.0717519472850487) internal successors, (114342), 106687 states have internal predecessors, (114342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:04,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106688 states to 106688 states and 114342 transitions. [2022-07-19 12:21:04,391 INFO L78 Accepts]: Start accepts. Automaton has 106688 states and 114342 transitions. Word has length 406 [2022-07-19 12:21:04,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:04,392 INFO L495 AbstractCegarLoop]: Abstraction has 106688 states and 114342 transitions. [2022-07-19 12:21:04,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:04,392 INFO L276 IsEmpty]: Start isEmpty. Operand 106688 states and 114342 transitions. [2022-07-19 12:21:04,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 453 [2022-07-19 12:21:04,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:04,580 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1] [2022-07-19 12:21:04,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-19 12:21:04,781 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,SelfDestructingSolverStorable12 [2022-07-19 12:21:04,781 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:04,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:04,782 INFO L85 PathProgramCache]: Analyzing trace with hash 863507, now seen corresponding path program 1 times [2022-07-19 12:21:04,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:04,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307231005] [2022-07-19 12:21:04,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:04,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:04,955 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 667 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-19 12:21:04,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:04,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307231005] [2022-07-19 12:21:04,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307231005] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:04,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:04,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:04,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700799323] [2022-07-19 12:21:04,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:04,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:04,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:04,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:04,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:04,959 INFO L87 Difference]: Start difference. First operand 106688 states and 114342 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:08,160 INFO L93 Difference]: Finished difference Result 214166 states and 229485 transitions. [2022-07-19 12:21:08,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:08,160 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 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 [2022-07-19 12:21:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:08,469 INFO L225 Difference]: With dead ends: 214166 [2022-07-19 12:21:08,470 INFO L226 Difference]: Without dead ends: 108267 [2022-07-19 12:21:08,528 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:08,529 INFO L413 NwaCegarLoop]: 1351 mSDtfsCounter, 938 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2396 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1436 SdHoareTripleChecker+Invalid, 2979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 2396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:08,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1436 Invalid, 2979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 2396 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:21:08,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108267 states. [2022-07-19 12:21:09,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108267 to 106678. [2022-07-19 12:21:09,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106678 states, 106677 states have (on average 1.0612034459161768) internal successors, (113206), 106677 states have internal predecessors, (113206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:09,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106678 states to 106678 states and 113206 transitions. [2022-07-19 12:21:09,754 INFO L78 Accepts]: Start accepts. Automaton has 106678 states and 113206 transitions. Word has length 452 [2022-07-19 12:21:09,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:09,755 INFO L495 AbstractCegarLoop]: Abstraction has 106678 states and 113206 transitions. [2022-07-19 12:21:09,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 106678 states and 113206 transitions. [2022-07-19 12:21:09,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2022-07-19 12:21:09,967 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:09,968 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:09,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 12:21:09,968 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:09,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1364798383, now seen corresponding path program 1 times [2022-07-19 12:21:09,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:09,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93492606] [2022-07-19 12:21:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:09,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:10,215 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 639 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-07-19 12:21:10,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:10,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93492606] [2022-07-19 12:21:10,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93492606] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:10,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:10,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:10,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656699054] [2022-07-19 12:21:10,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:10,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:10,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:10,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:10,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:10,218 INFO L87 Difference]: Start difference. First operand 106678 states and 113206 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:13,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:13,854 INFO L93 Difference]: Finished difference Result 237756 states and 253279 transitions. [2022-07-19 12:21:13,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:13,855 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 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 476 [2022-07-19 12:21:13,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:14,010 INFO L225 Difference]: With dead ends: 237756 [2022-07-19 12:21:14,010 INFO L226 Difference]: Without dead ends: 131867 [2022-07-19 12:21:14,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:14,039 INFO L413 NwaCegarLoop]: 666 mSDtfsCounter, 876 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2344 mSolverCounterSat, 739 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 876 SdHoareTripleChecker+Valid, 745 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 739 IncrementalHoareTripleChecker+Valid, 2344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:14,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [876 Valid, 745 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [739 Valid, 2344 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-19 12:21:14,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131867 states. [2022-07-19 12:21:15,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131867 to 130274. [2022-07-19 12:21:15,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130274 states, 130273 states have (on average 1.059306226155842) internal successors, (137999), 130273 states have internal predecessors, (137999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130274 states to 130274 states and 137999 transitions. [2022-07-19 12:21:15,514 INFO L78 Accepts]: Start accepts. Automaton has 130274 states and 137999 transitions. Word has length 476 [2022-07-19 12:21:15,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:15,515 INFO L495 AbstractCegarLoop]: Abstraction has 130274 states and 137999 transitions. [2022-07-19 12:21:15,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 130274 states and 137999 transitions. [2022-07-19 12:21:15,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2022-07-19 12:21:15,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:15,524 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:15,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 12:21:15,524 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:15,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:15,525 INFO L85 PathProgramCache]: Analyzing trace with hash -942422012, now seen corresponding path program 1 times [2022-07-19 12:21:15,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:15,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398149318] [2022-07-19 12:21:15,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:15,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:15,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 310 proven. 0 refuted. 0 times theorem prover too weak. 536 trivial. 0 not checked. [2022-07-19 12:21:16,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:16,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398149318] [2022-07-19 12:21:16,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398149318] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:16,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:16,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 12:21:16,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130648516] [2022-07-19 12:21:16,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:16,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:16,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:16,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:16,063 INFO L87 Difference]: Start difference. First operand 130274 states and 137999 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:18,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:18,505 INFO L93 Difference]: Finished difference Result 245571 states and 260677 transitions. [2022-07-19 12:21:18,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:18,506 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 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 493 [2022-07-19 12:21:18,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:18,673 INFO L225 Difference]: With dead ends: 245571 [2022-07-19 12:21:18,673 INFO L226 Difference]: Without dead ends: 129471 [2022-07-19 12:21:18,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:18,742 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 1610 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 1475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:18,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1610 Valid, 294 Invalid, 1475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-19 12:21:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129471 states. [2022-07-19 12:21:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129471 to 129470. [2022-07-19 12:21:20,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129470 states, 129469 states have (on average 1.0591261228556643) internal successors, (137124), 129469 states have internal predecessors, (137124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:20,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129470 states to 129470 states and 137124 transitions. [2022-07-19 12:21:20,361 INFO L78 Accepts]: Start accepts. Automaton has 129470 states and 137124 transitions. Word has length 493 [2022-07-19 12:21:20,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:20,361 INFO L495 AbstractCegarLoop]: Abstraction has 129470 states and 137124 transitions. [2022-07-19 12:21:20,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:20,362 INFO L276 IsEmpty]: Start isEmpty. Operand 129470 states and 137124 transitions. [2022-07-19 12:21:20,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2022-07-19 12:21:20,369 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:20,370 INFO L195 NwaCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-19 12:21:20,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 12:21:20,370 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:20,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash 84700328, now seen corresponding path program 1 times [2022-07-19 12:21:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:20,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263268473] [2022-07-19 12:21:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:20,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 285 trivial. 0 not checked. [2022-07-19 12:21:20,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:20,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263268473] [2022-07-19 12:21:20,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263268473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:20,526 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:20,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:20,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261626999] [2022-07-19 12:21:20,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:20,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:20,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:20,529 INFO L87 Difference]: Start difference. First operand 129470 states and 137124 transitions. Second operand has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:24,097 INFO L93 Difference]: Finished difference Result 258954 states and 274249 transitions. [2022-07-19 12:21:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 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 495 [2022-07-19 12:21:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:24,266 INFO L225 Difference]: With dead ends: 258954 [2022-07-19 12:21:24,266 INFO L226 Difference]: Without dead ends: 128699 [2022-07-19 12:21:24,345 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:24,345 INFO L413 NwaCegarLoop]: 1661 mSDtfsCounter, 791 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2438 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 791 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 2842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 2438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:24,346 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [791 Valid, 1800 Invalid, 2842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 2438 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-19 12:21:24,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128699 states. [2022-07-19 12:21:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128699 to 127107. [2022-07-19 12:21:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127107 states, 127106 states have (on average 1.0460088430129184) internal successors, (132954), 127106 states have internal predecessors, (132954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:26,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127107 states to 127107 states and 132954 transitions. [2022-07-19 12:21:26,063 INFO L78 Accepts]: Start accepts. Automaton has 127107 states and 132954 transitions. Word has length 495 [2022-07-19 12:21:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:26,063 INFO L495 AbstractCegarLoop]: Abstraction has 127107 states and 132954 transitions. [2022-07-19 12:21:26,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 127107 states and 132954 transitions. [2022-07-19 12:21:26,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2022-07-19 12:21:26,070 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:26,070 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:26,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 12:21:26,070 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:26,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:26,071 INFO L85 PathProgramCache]: Analyzing trace with hash -230342840, now seen corresponding path program 1 times [2022-07-19 12:21:26,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:26,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809491857] [2022-07-19 12:21:26,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:26,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:26,224 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 575 proven. 0 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-19 12:21:26,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:26,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809491857] [2022-07-19 12:21:26,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809491857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:26,225 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:26,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:26,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048551887] [2022-07-19 12:21:26,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:26,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:26,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:26,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:26,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:26,227 INFO L87 Difference]: Start difference. First operand 127107 states and 132954 transitions. Second operand has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:30,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:30,441 INFO L93 Difference]: Finished difference Result 293594 states and 308251 transitions. [2022-07-19 12:21:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:30,442 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 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 504 [2022-07-19 12:21:30,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:30,701 INFO L225 Difference]: With dead ends: 293594 [2022-07-19 12:21:30,701 INFO L226 Difference]: Without dead ends: 180661 [2022-07-19 12:21:30,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:30,742 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 1016 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 892 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1016 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 3290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:30,743 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1016 Valid, 578 Invalid, 3290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [892 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 12:21:30,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180661 states. [2022-07-19 12:21:32,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180661 to 180657. [2022-07-19 12:21:32,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180657 states, 180656 states have (on average 1.044443583384997) internal successors, (188685), 180656 states have internal predecessors, (188685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:33,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180657 states to 180657 states and 188685 transitions. [2022-07-19 12:21:33,116 INFO L78 Accepts]: Start accepts. Automaton has 180657 states and 188685 transitions. Word has length 504 [2022-07-19 12:21:33,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:33,117 INFO L495 AbstractCegarLoop]: Abstraction has 180657 states and 188685 transitions. [2022-07-19 12:21:33,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:33,117 INFO L276 IsEmpty]: Start isEmpty. Operand 180657 states and 188685 transitions. [2022-07-19 12:21:33,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-07-19 12:21:33,122 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:33,123 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:33,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 12:21:33,123 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:33,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1350760183, now seen corresponding path program 1 times [2022-07-19 12:21:33,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:33,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245780792] [2022-07-19 12:21:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:33,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:33,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:33,309 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 323 proven. 0 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-07-19 12:21:33,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:33,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245780792] [2022-07-19 12:21:33,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245780792] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:33,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:33,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:33,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373563447] [2022-07-19 12:21:33,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:33,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 12:21:33,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:33,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 12:21:33,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:33,312 INFO L87 Difference]: Start difference. First operand 180657 states and 188685 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:37,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:37,396 INFO L93 Difference]: Finished difference Result 380269 states and 397381 transitions. [2022-07-19 12:21:37,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 12:21:37,397 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 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 507 [2022-07-19 12:21:37,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:38,111 INFO L225 Difference]: With dead ends: 380269 [2022-07-19 12:21:38,111 INFO L226 Difference]: Without dead ends: 213786 [2022-07-19 12:21:38,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 12:21:38,241 INFO L413 NwaCegarLoop]: 1479 mSDtfsCounter, 852 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 2778 mSolverCounterSat, 311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 1589 SdHoareTripleChecker+Invalid, 3089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 311 IncrementalHoareTripleChecker+Valid, 2778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:38,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 1589 Invalid, 3089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [311 Valid, 2778 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-19 12:21:38,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213786 states. [2022-07-19 12:21:40,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213786 to 195623. [2022-07-19 12:21:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195623 states, 195622 states have (on average 1.0439878950220323) internal successors, (204227), 195622 states have internal predecessors, (204227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195623 states to 195623 states and 204227 transitions. [2022-07-19 12:21:40,962 INFO L78 Accepts]: Start accepts. Automaton has 195623 states and 204227 transitions. Word has length 507 [2022-07-19 12:21:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 12:21:40,962 INFO L495 AbstractCegarLoop]: Abstraction has 195623 states and 204227 transitions. [2022-07-19 12:21:40,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:40,963 INFO L276 IsEmpty]: Start isEmpty. Operand 195623 states and 204227 transitions. [2022-07-19 12:21:40,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2022-07-19 12:21:40,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 12:21:40,973 INFO L195 NwaCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 12:21:40,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 12:21:40,973 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 12:21:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 12:21:40,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1787200556, now seen corresponding path program 1 times [2022-07-19 12:21:40,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 12:21:40,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976487254] [2022-07-19 12:21:40,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 12:21:40,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 12:21:41,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 12:21:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 571 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2022-07-19 12:21:41,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 12:21:41,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976487254] [2022-07-19 12:21:41,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976487254] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 12:21:41,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 12:21:41,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 12:21:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267306864] [2022-07-19 12:21:41,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 12:21:41,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 12:21:41,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 12:21:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 12:21:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 12:21:41,140 INFO L87 Difference]: Start difference. First operand 195623 states and 204227 transitions. Second operand has 4 states, 4 states have (on average 104.5) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 12:21:48,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 12:21:48,162 INFO L93 Difference]: Finished difference Result 441772 states and 461178 transitions. [2022-07-19 12:21:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 12:21:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 104.5) internal successors, (418), 3 states have internal predecessors, (418), 0 states have call successors, (0), 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 566 [2022-07-19 12:21:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 12:21:48,531 INFO L225 Difference]: With dead ends: 441772 [2022-07-19 12:21:48,532 INFO L226 Difference]: Without dead ends: 246938 [2022-07-19 12:21:48,645 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 [2022-07-19 12:21:48,646 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 1667 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 6173 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1667 SdHoareTripleChecker+Valid, 873 SdHoareTripleChecker+Invalid, 6844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 6173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-07-19 12:21:48,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1667 Valid, 873 Invalid, 6844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 6173 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-07-19 12:21:48,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246938 states. [2022-07-19 12:21:51,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246938 to 242098. [2022-07-19 12:21:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242098 states, 242097 states have (on average 1.0437799724903654) internal successors, (252696), 242097 states have internal predecessors, (252696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)