./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label30.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/Problem03_label30.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 a272bf0f73a58d72dfba23a9c902bbeb665b6b76cc21acf92951a09cb8e04c47 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:12:34,997 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:12:35,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:12:35,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:12:35,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:12:35,040 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:12:35,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:12:35,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:12:35,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:12:35,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:12:35,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:12:35,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:12:35,047 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:12:35,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:12:35,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:12:35,050 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:12:35,051 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:12:35,052 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:12:35,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:12:35,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:12:35,055 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:12:35,061 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:12:35,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:12:35,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:12:35,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:12:35,067 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:12:35,075 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:12:35,076 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:12:35,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:12:35,078 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:12:35,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:12:35,079 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:12:35,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:12:35,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:12:35,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:12:35,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:12:35,084 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:12:35,085 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:12:35,085 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:12:35,085 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:12:35,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:12:35,088 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:12:35,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:12:35,120 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:12:35,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:12:35,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:12:35,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:12:35,122 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:12:35,122 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:12:35,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:12:35,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:12:35,123 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:12:35,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:12:35,124 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:12:35,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:12:35,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:12:35,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:12:35,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:12:35,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:12:35,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:12:35,126 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:12:35,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:12:35,126 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:12:35,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:12:35,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:12:35,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:12:35,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:12:35,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:12:35,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:12:35,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:12:35,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:12:35,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:12:35,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:12:35,129 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:12:35,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:12:35,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:12:35,129 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a272bf0f73a58d72dfba23a9c902bbeb665b6b76cc21acf92951a09cb8e04c47 [2022-07-19 11:12:35,379 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:12:35,398 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:12:35,401 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:12:35,402 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:12:35,403 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:12:35,404 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label30.c [2022-07-19 11:12:35,475 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ded7c82/f1dc3538abec4df9a63dbe10007f2b85/FLAG57379c2a4 [2022-07-19 11:12:36,045 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:12:36,046 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label30.c [2022-07-19 11:12:36,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ded7c82/f1dc3538abec4df9a63dbe10007f2b85/FLAG57379c2a4 [2022-07-19 11:12:36,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/08ded7c82/f1dc3538abec4df9a63dbe10007f2b85 [2022-07-19 11:12:36,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:12:36,296 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:12:36,298 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:12:36,298 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:12:36,301 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:12:36,302 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:12:36" (1/1) ... [2022-07-19 11:12:36,303 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56624314 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:36, skipping insertion in model container [2022-07-19 11:12:36,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:12:36" (1/1) ... [2022-07-19 11:12:36,309 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:12:36,389 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:12:36,922 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/Problem03_label30.c[57849,57862] [2022-07-19 11:12:36,962 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:12:36,970 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:12:37,141 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/Problem03_label30.c[57849,57862] [2022-07-19 11:12:37,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:12:37,169 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:12:37,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37 WrapperNode [2022-07-19 11:12:37,171 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:12:37,172 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:12:37,172 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:12:37,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:12:37,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,210 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,299 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:12:37,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:12:37,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:12:37,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:12:37,301 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:12:37,308 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,308 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,318 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,319 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,360 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,391 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:12:37,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:12:37,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:12:37,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:12:37,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (1/1) ... [2022-07-19 11:12:37,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:12:37,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:37,437 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 11:12:37,481 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 11:12:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:12:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:12:37,494 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:12:37,494 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:12:37,560 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:12:37,561 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:12:38,925 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:12:38,933 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:12:38,933 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:12:38,935 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:12:38 BoogieIcfgContainer [2022-07-19 11:12:38,935 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:12:38,937 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:12:38,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:12:38,940 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:12:38,940 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:12:36" (1/3) ... [2022-07-19 11:12:38,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132e4c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:12:38, skipping insertion in model container [2022-07-19 11:12:38,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:37" (2/3) ... [2022-07-19 11:12:38,942 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@132e4c04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:12:38, skipping insertion in model container [2022-07-19 11:12:38,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:12:38" (3/3) ... [2022-07-19 11:12:38,943 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label30.c [2022-07-19 11:12:38,955 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:12:38,956 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:12:39,000 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:12:39,006 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@40547b1f, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@29166121 [2022-07-19 11:12:39,006 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:12:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 11:12:39,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-19 11:12:39,024 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:39,025 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:39,026 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 174616531, now seen corresponding path program 1 times [2022-07-19 11:12:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:39,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081241645] [2022-07-19 11:12:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:39,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:39,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:39,628 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 11:12:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:39,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081241645] [2022-07-19 11:12:39,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081241645] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:39,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:39,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:39,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598813711] [2022-07-19 11:12:39,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:39,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:39,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:39,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:39,670 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 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 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 11:12:40,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:40,726 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-07-19 11:12:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 175 [2022-07-19 11:12:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:40,741 INFO L225 Difference]: With dead ends: 824 [2022-07-19 11:12:40,741 INFO L226 Difference]: Without dead ends: 444 [2022-07-19 11:12:40,745 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 11:12:40,748 INFO L413 NwaCegarLoop]: 213 mSDtfsCounter, 55 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:40,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 238 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:12:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-19 11:12:40,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 443. [2022-07-19 11:12:40,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.418552036199095) internal successors, (627), 442 states have internal predecessors, (627), 0 states have call successors, (0), 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 11:12:40,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 627 transitions. [2022-07-19 11:12:40,830 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 627 transitions. Word has length 175 [2022-07-19 11:12:40,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:40,833 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 627 transitions. [2022-07-19 11:12:40,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 2 states have internal predecessors, (175), 0 states have call successors, (0), 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 11:12:40,834 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 627 transitions. [2022-07-19 11:12:40,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-19 11:12:40,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:40,846 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:40,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:12:40,847 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:40,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:40,848 INFO L85 PathProgramCache]: Analyzing trace with hash -93879212, now seen corresponding path program 1 times [2022-07-19 11:12:40,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:40,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228429572] [2022-07-19 11:12:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:40,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:40,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228429572] [2022-07-19 11:12:40,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228429572] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:40,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:40,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:40,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080907630] [2022-07-19 11:12:40,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:40,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:40,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:40,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:40,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:40,995 INFO L87 Difference]: Start difference. First operand 443 states and 627 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 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 11:12:41,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:41,714 INFO L93 Difference]: Finished difference Result 1310 states and 1861 transitions. [2022-07-19 11:12:41,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:41,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 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 183 [2022-07-19 11:12:41,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:41,722 INFO L225 Difference]: With dead ends: 1310 [2022-07-19 11:12:41,722 INFO L226 Difference]: Without dead ends: 869 [2022-07-19 11:12:41,723 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 11:12:41,724 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 247 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:41,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 92 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2022-07-19 11:12:41,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 855. [2022-07-19 11:12:41,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 854 states have (on average 1.3875878220140516) internal successors, (1185), 854 states have internal predecessors, (1185), 0 states have call successors, (0), 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 11:12:41,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1185 transitions. [2022-07-19 11:12:41,753 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1185 transitions. Word has length 183 [2022-07-19 11:12:41,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:41,753 INFO L495 AbstractCegarLoop]: Abstraction has 855 states and 1185 transitions. [2022-07-19 11:12:41,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 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 11:12:41,754 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1185 transitions. [2022-07-19 11:12:41,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-19 11:12:41,756 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:41,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:12:41,757 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:41,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:41,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1497909608, now seen corresponding path program 1 times [2022-07-19 11:12:41,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:41,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042997473] [2022-07-19 11:12:41,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:41,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 11:12:41,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:41,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042997473] [2022-07-19 11:12:41,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042997473] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:41,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:41,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:41,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330468810] [2022-07-19 11:12:41,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:41,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:41,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:41,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:41,844 INFO L87 Difference]: Start difference. First operand 855 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 11:12:42,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:42,603 INFO L93 Difference]: Finished difference Result 2547 states and 3535 transitions. [2022-07-19 11:12:42,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:42,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 192 [2022-07-19 11:12:42,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:42,611 INFO L225 Difference]: With dead ends: 2547 [2022-07-19 11:12:42,611 INFO L226 Difference]: Without dead ends: 1694 [2022-07-19 11:12:42,614 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 11:12:42,615 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 275 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:42,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 227 Invalid, 765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1694 states. [2022-07-19 11:12:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1694 to 1687. [2022-07-19 11:12:42,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1687 states, 1686 states have (on average 1.3724792408066429) internal successors, (2314), 1686 states have internal predecessors, (2314), 0 states have call successors, (0), 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 11:12:42,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1687 states to 1687 states and 2314 transitions. [2022-07-19 11:12:42,665 INFO L78 Accepts]: Start accepts. Automaton has 1687 states and 2314 transitions. Word has length 192 [2022-07-19 11:12:42,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:42,666 INFO L495 AbstractCegarLoop]: Abstraction has 1687 states and 2314 transitions. [2022-07-19 11:12:42,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 2 states have internal predecessors, (188), 0 states have call successors, (0), 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 11:12:42,667 INFO L276 IsEmpty]: Start isEmpty. Operand 1687 states and 2314 transitions. [2022-07-19 11:12:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-19 11:12:42,671 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:42,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:12:42,672 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:42,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:42,673 INFO L85 PathProgramCache]: Analyzing trace with hash 800099661, now seen corresponding path program 1 times [2022-07-19 11:12:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:42,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181049435] [2022-07-19 11:12:42,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:42,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:42,758 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:42,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:42,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181049435] [2022-07-19 11:12:42,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181049435] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:42,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:42,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:42,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777801091] [2022-07-19 11:12:42,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:42,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:42,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:42,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:42,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:42,762 INFO L87 Difference]: Start difference. First operand 1687 states and 2314 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:12:43,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:43,501 INFO L93 Difference]: Finished difference Result 4190 states and 5944 transitions. [2022-07-19 11:12:43,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:43,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 195 [2022-07-19 11:12:43,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:43,511 INFO L225 Difference]: With dead ends: 4190 [2022-07-19 11:12:43,511 INFO L226 Difference]: Without dead ends: 2505 [2022-07-19 11:12:43,514 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 11:12:43,524 INFO L413 NwaCegarLoop]: 377 mSDtfsCounter, 236 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:43,526 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 405 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2505 states. [2022-07-19 11:12:43,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2505 to 2502. [2022-07-19 11:12:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2502 states, 2501 states have (on average 1.3102758896441424) internal successors, (3277), 2501 states have internal predecessors, (3277), 0 states have call successors, (0), 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 11:12:43,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2502 states to 2502 states and 3277 transitions. [2022-07-19 11:12:43,582 INFO L78 Accepts]: Start accepts. Automaton has 2502 states and 3277 transitions. Word has length 195 [2022-07-19 11:12:43,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:43,583 INFO L495 AbstractCegarLoop]: Abstraction has 2502 states and 3277 transitions. [2022-07-19 11:12:43,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 11:12:43,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2502 states and 3277 transitions. [2022-07-19 11:12:43,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-19 11:12:43,589 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:43,590 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:43,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:12:43,590 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:43,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1457983073, now seen corresponding path program 1 times [2022-07-19 11:12:43,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:43,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458152916] [2022-07-19 11:12:43,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:43,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:43,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458152916] [2022-07-19 11:12:43,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458152916] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:43,667 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:43,668 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:43,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054084874] [2022-07-19 11:12:43,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:43,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:43,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:43,670 INFO L87 Difference]: Start difference. First operand 2502 states and 3277 transitions. Second operand has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 11:12:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:44,376 INFO L93 Difference]: Finished difference Result 5827 states and 7690 transitions. [2022-07-19 11:12:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:44,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 203 [2022-07-19 11:12:44,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:44,389 INFO L225 Difference]: With dead ends: 5827 [2022-07-19 11:12:44,390 INFO L226 Difference]: Without dead ends: 3327 [2022-07-19 11:12:44,394 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 11:12:44,395 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:44,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 364 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:44,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2022-07-19 11:12:44,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 3317. [2022-07-19 11:12:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3317 states, 3316 states have (on average 1.2831724969843186) internal successors, (4255), 3316 states have internal predecessors, (4255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:44,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3317 states to 3317 states and 4255 transitions. [2022-07-19 11:12:44,467 INFO L78 Accepts]: Start accepts. Automaton has 3317 states and 4255 transitions. Word has length 203 [2022-07-19 11:12:44,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:44,467 INFO L495 AbstractCegarLoop]: Abstraction has 3317 states and 4255 transitions. [2022-07-19 11:12:44,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.0) internal successors, (198), 3 states have internal predecessors, (198), 0 states have call successors, (0), 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 11:12:44,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3317 states and 4255 transitions. [2022-07-19 11:12:44,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-07-19 11:12:44,481 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:44,481 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:44,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:12:44,483 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:44,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:44,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1450768731, now seen corresponding path program 1 times [2022-07-19 11:12:44,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:44,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803884585] [2022-07-19 11:12:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:44,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 46 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:44,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:44,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803884585] [2022-07-19 11:12:44,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803884585] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:44,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:44,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:44,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522090952] [2022-07-19 11:12:44,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:44,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:44,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:44,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:44,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:44,588 INFO L87 Difference]: Start difference. First operand 3317 states and 4255 transitions. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 11:12:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:45,295 INFO L93 Difference]: Finished difference Result 9081 states and 11775 transitions. [2022-07-19 11:12:45,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:45,296 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 210 [2022-07-19 11:12:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:45,319 INFO L225 Difference]: With dead ends: 9081 [2022-07-19 11:12:45,319 INFO L226 Difference]: Without dead ends: 5766 [2022-07-19 11:12:45,325 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 11:12:45,327 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 202 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:45,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 386 Invalid, 745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5766 states. [2022-07-19 11:12:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5766 to 5760. [2022-07-19 11:12:45,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5760 states, 5759 states have (on average 1.2401458586560166) internal successors, (7142), 5759 states have internal predecessors, (7142), 0 states have call successors, (0), 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 11:12:45,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5760 states to 5760 states and 7142 transitions. [2022-07-19 11:12:45,435 INFO L78 Accepts]: Start accepts. Automaton has 5760 states and 7142 transitions. Word has length 210 [2022-07-19 11:12:45,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:45,435 INFO L495 AbstractCegarLoop]: Abstraction has 5760 states and 7142 transitions. [2022-07-19 11:12:45,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 0 states have call successors, (0), 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 11:12:45,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5760 states and 7142 transitions. [2022-07-19 11:12:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-19 11:12:45,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:45,446 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:45,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:12:45,447 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:45,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:45,447 INFO L85 PathProgramCache]: Analyzing trace with hash 543920742, now seen corresponding path program 1 times [2022-07-19 11:12:45,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:45,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627434933] [2022-07-19 11:12:45,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:45,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:45,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:45,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:45,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627434933] [2022-07-19 11:12:45,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627434933] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:45,593 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:45,593 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373671521] [2022-07-19 11:12:45,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:45,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:45,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:45,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:45,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:45,596 INFO L87 Difference]: Start difference. First operand 5760 states and 7142 transitions. Second operand has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:46,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:46,723 INFO L93 Difference]: Finished difference Result 11544 states and 14334 transitions. [2022-07-19 11:12:46,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:46,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2022-07-19 11:12:46,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:46,742 INFO L225 Difference]: With dead ends: 11544 [2022-07-19 11:12:46,742 INFO L226 Difference]: Without dead ends: 5786 [2022-07-19 11:12:46,750 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 11:12:46,751 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 407 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 1383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:46,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [407 Valid, 199 Invalid, 1383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 11:12:46,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5786 states. [2022-07-19 11:12:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5786 to 4948. [2022-07-19 11:12:46,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4948 states, 4947 states have (on average 1.2460076814230847) internal successors, (6164), 4947 states have internal predecessors, (6164), 0 states have call successors, (0), 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 11:12:46,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4948 states to 4948 states and 6164 transitions. [2022-07-19 11:12:46,868 INFO L78 Accepts]: Start accepts. Automaton has 4948 states and 6164 transitions. Word has length 219 [2022-07-19 11:12:46,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:46,869 INFO L495 AbstractCegarLoop]: Abstraction has 4948 states and 6164 transitions. [2022-07-19 11:12:46,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 54.75) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:46,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4948 states and 6164 transitions. [2022-07-19 11:12:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-19 11:12:46,878 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:46,879 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:46,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 11:12:46,879 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:46,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash 659726089, now seen corresponding path program 1 times [2022-07-19 11:12:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:46,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993194392] [2022-07-19 11:12:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:46,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:46,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:46,961 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 11:12:46,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:46,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993194392] [2022-07-19 11:12:46,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993194392] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:46,962 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:46,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:46,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781071038] [2022-07-19 11:12:46,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:46,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:46,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:46,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:46,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:46,964 INFO L87 Difference]: Start difference. First operand 4948 states and 6164 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 11:12:47,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:47,723 INFO L93 Difference]: Finished difference Result 14393 states and 17935 transitions. [2022-07-19 11:12:47,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:47,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 223 [2022-07-19 11:12:47,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:47,751 INFO L225 Difference]: With dead ends: 14393 [2022-07-19 11:12:47,752 INFO L226 Difference]: Without dead ends: 9447 [2022-07-19 11:12:47,758 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 11:12:47,758 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 218 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:47,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 196 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2022-07-19 11:12:47,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 9436. [2022-07-19 11:12:47,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9436 states, 9435 states have (on average 1.2218335983041866) internal successors, (11528), 9435 states have internal predecessors, (11528), 0 states have call successors, (0), 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 11:12:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9436 states to 9436 states and 11528 transitions. [2022-07-19 11:12:47,922 INFO L78 Accepts]: Start accepts. Automaton has 9436 states and 11528 transitions. Word has length 223 [2022-07-19 11:12:47,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:47,923 INFO L495 AbstractCegarLoop]: Abstraction has 9436 states and 11528 transitions. [2022-07-19 11:12:47,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 11:12:47,936 INFO L276 IsEmpty]: Start isEmpty. Operand 9436 states and 11528 transitions. [2022-07-19 11:12:47,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-19 11:12:47,953 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:47,953 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:12:47,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:12:47,955 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:47,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:47,955 INFO L85 PathProgramCache]: Analyzing trace with hash 890126555, now seen corresponding path program 1 times [2022-07-19 11:12:47,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:47,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595761934] [2022-07-19 11:12:47,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:47,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:48,072 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:12:48,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595761934] [2022-07-19 11:12:48,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595761934] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:48,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590990884] [2022-07-19 11:12:48,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:48,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:48,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:48,076 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 11:12:48,107 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 11:12:48,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:48,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:48,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:48,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:12:48,833 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:48,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590990884] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:12:48,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:12:48,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-07-19 11:12:48,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736794937] [2022-07-19 11:12:48,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:12:48,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:12:48,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:48,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:12:48,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:48,837 INFO L87 Difference]: Start difference. First operand 9436 states and 11528 transitions. Second operand has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 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 11:12:52,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:52,382 INFO L93 Difference]: Finished difference Result 61772 states and 76379 transitions. [2022-07-19 11:12:52,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:12:52,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 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 226 [2022-07-19 11:12:52,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:52,486 INFO L225 Difference]: With dead ends: 61772 [2022-07-19 11:12:52,486 INFO L226 Difference]: Without dead ends: 52541 [2022-07-19 11:12:52,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:12:52,509 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 2651 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 3778 mSolverCounterSat, 1227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 5005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1227 IncrementalHoareTripleChecker+Valid, 3778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:52,509 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2651 Valid, 407 Invalid, 5005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1227 Valid, 3778 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-19 11:12:52,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52541 states. [2022-07-19 11:12:53,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52541 to 51667. [2022-07-19 11:12:53,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51667 states, 51666 states have (on average 1.178066813765339) internal successors, (60866), 51666 states have internal predecessors, (60866), 0 states have call successors, (0), 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 11:12:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51667 states to 51667 states and 60866 transitions. [2022-07-19 11:12:53,579 INFO L78 Accepts]: Start accepts. Automaton has 51667 states and 60866 transitions. Word has length 226 [2022-07-19 11:12:53,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:53,581 INFO L495 AbstractCegarLoop]: Abstraction has 51667 states and 60866 transitions. [2022-07-19 11:12:53,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 72.33333333333333) internal successors, (434), 6 states have internal predecessors, (434), 0 states have call successors, (0), 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 11:12:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 51667 states and 60866 transitions. [2022-07-19 11:12:53,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-07-19 11:12:53,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:53,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:53,645 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 11:12:53,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:53,832 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:53,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:53,832 INFO L85 PathProgramCache]: Analyzing trace with hash 26999431, now seen corresponding path program 1 times [2022-07-19 11:12:53,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:53,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627946819] [2022-07-19 11:12:53,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:53,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:53,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:54,002 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 73 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:54,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:54,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627946819] [2022-07-19 11:12:54,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627946819] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:54,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:54,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:54,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643930499] [2022-07-19 11:12:54,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:54,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:54,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:54,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:54,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:54,006 INFO L87 Difference]: Start difference. First operand 51667 states and 60866 transitions. Second operand has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 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 11:12:55,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:55,010 INFO L93 Difference]: Finished difference Result 102113 states and 120353 transitions. [2022-07-19 11:12:55,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:55,011 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 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 249 [2022-07-19 11:12:55,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:55,232 INFO L225 Difference]: With dead ends: 102113 [2022-07-19 11:12:55,233 INFO L226 Difference]: Without dead ends: 51057 [2022-07-19 11:12:55,276 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 11:12:55,278 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 133 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:55,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 196 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:55,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51057 states. [2022-07-19 11:12:56,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51057 to 51056. [2022-07-19 11:12:56,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51056 states, 51055 states have (on average 1.1772206444030946) internal successors, (60103), 51055 states have internal predecessors, (60103), 0 states have call successors, (0), 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 11:12:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51056 states to 51056 states and 60103 transitions. [2022-07-19 11:12:56,220 INFO L78 Accepts]: Start accepts. Automaton has 51056 states and 60103 transitions. Word has length 249 [2022-07-19 11:12:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:56,220 INFO L495 AbstractCegarLoop]: Abstraction has 51056 states and 60103 transitions. [2022-07-19 11:12:56,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 83.0) internal successors, (249), 2 states have internal predecessors, (249), 0 states have call successors, (0), 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 11:12:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 51056 states and 60103 transitions. [2022-07-19 11:12:56,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-07-19 11:12:56,252 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:56,253 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:56,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 11:12:56,253 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:56,254 INFO L85 PathProgramCache]: Analyzing trace with hash -213655855, now seen corresponding path program 1 times [2022-07-19 11:12:56,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:56,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477684403] [2022-07-19 11:12:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:56,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:56,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477684403] [2022-07-19 11:12:56,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477684403] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:56,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:56,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:56,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425831265] [2022-07-19 11:12:56,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:56,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:56,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:56,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:56,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:56,498 INFO L87 Difference]: Start difference. First operand 51056 states and 60103 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 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 11:12:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:57,572 INFO L93 Difference]: Finished difference Result 122493 states and 144278 transitions. [2022-07-19 11:12:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:57,573 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 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 253 [2022-07-19 11:12:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:57,710 INFO L225 Difference]: With dead ends: 122493 [2022-07-19 11:12:57,711 INFO L226 Difference]: Without dead ends: 72454 [2022-07-19 11:12:57,758 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 11:12:57,759 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 188 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:57,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 219 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:57,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72454 states. [2022-07-19 11:12:58,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72454 to 72036. [2022-07-19 11:12:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72036 states, 72035 states have (on average 1.169945165544527) internal successors, (84277), 72035 states have internal predecessors, (84277), 0 states have call successors, (0), 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 11:12:58,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72036 states to 72036 states and 84277 transitions. [2022-07-19 11:12:58,841 INFO L78 Accepts]: Start accepts. Automaton has 72036 states and 84277 transitions. Word has length 253 [2022-07-19 11:12:58,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:58,841 INFO L495 AbstractCegarLoop]: Abstraction has 72036 states and 84277 transitions. [2022-07-19 11:12:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 2 states have internal predecessors, (253), 0 states have call successors, (0), 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 11:12:58,841 INFO L276 IsEmpty]: Start isEmpty. Operand 72036 states and 84277 transitions. [2022-07-19 11:12:58,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-07-19 11:12:58,876 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:58,876 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:58,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:12:58,877 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:58,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:58,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1780262992, now seen corresponding path program 1 times [2022-07-19 11:12:58,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:58,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562911785] [2022-07-19 11:12:58,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:58,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:58,968 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 66 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 11:12:58,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:58,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562911785] [2022-07-19 11:12:58,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562911785] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:58,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:58,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:58,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62252870] [2022-07-19 11:12:58,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:58,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:58,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:58,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:58,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:58,971 INFO L87 Difference]: Start difference. First operand 72036 states and 84277 transitions. Second operand has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 11:13:00,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:00,311 INFO L93 Difference]: Finished difference Result 147986 states and 173071 transitions. [2022-07-19 11:13:00,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:00,312 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 283 [2022-07-19 11:13:00,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:00,428 INFO L225 Difference]: With dead ends: 147986 [2022-07-19 11:13:00,428 INFO L226 Difference]: Without dead ends: 83678 [2022-07-19 11:13:00,470 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 11:13:00,471 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 241 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:00,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 219 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 751 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:13:00,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83678 states. [2022-07-19 11:13:01,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83678 to 83654. [2022-07-19 11:13:01,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83654 states, 83653 states have (on average 1.1674297395192044) internal successors, (97659), 83653 states have internal predecessors, (97659), 0 states have call successors, (0), 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 11:13:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83654 states to 83654 states and 97659 transitions. [2022-07-19 11:13:01,664 INFO L78 Accepts]: Start accepts. Automaton has 83654 states and 97659 transitions. Word has length 283 [2022-07-19 11:13:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:01,664 INFO L495 AbstractCegarLoop]: Abstraction has 83654 states and 97659 transitions. [2022-07-19 11:13:01,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 70.0) internal successors, (210), 2 states have internal predecessors, (210), 0 states have call successors, (0), 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 11:13:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 83654 states and 97659 transitions. [2022-07-19 11:13:01,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-07-19 11:13:01,738 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:01,738 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:01,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 11:13:01,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:01,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1542055283, now seen corresponding path program 1 times [2022-07-19 11:13:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990386243] [2022-07-19 11:13:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 121 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 11:13:01,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990386243] [2022-07-19 11:13:01,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990386243] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:01,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:01,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009655496] [2022-07-19 11:13:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:01,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:01,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:01,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:01,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:01,883 INFO L87 Difference]: Start difference. First operand 83654 states and 97659 transitions. Second operand has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:03,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:03,636 INFO L93 Difference]: Finished difference Result 185337 states and 216498 transitions. [2022-07-19 11:13:03,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:03,637 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 290 [2022-07-19 11:13:03,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:03,798 INFO L225 Difference]: With dead ends: 185337 [2022-07-19 11:13:03,798 INFO L226 Difference]: Without dead ends: 103717 [2022-07-19 11:13:03,835 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 11:13:03,836 INFO L413 NwaCegarLoop]: 126 mSDtfsCounter, 353 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 1460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:03,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 169 Invalid, 1460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 11:13:03,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103717 states. [2022-07-19 11:13:05,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103717 to 94863. [2022-07-19 11:13:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94863 states, 94862 states have (on average 1.1641015369694925) internal successors, (110429), 94862 states have internal predecessors, (110429), 0 states have call successors, (0), 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 11:13:05,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94863 states to 94863 states and 110429 transitions. [2022-07-19 11:13:05,236 INFO L78 Accepts]: Start accepts. Automaton has 94863 states and 110429 transitions. Word has length 290 [2022-07-19 11:13:05,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:05,237 INFO L495 AbstractCegarLoop]: Abstraction has 94863 states and 110429 transitions. [2022-07-19 11:13:05,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 69.75) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:05,237 INFO L276 IsEmpty]: Start isEmpty. Operand 94863 states and 110429 transitions. [2022-07-19 11:13:05,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-07-19 11:13:05,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:05,289 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:05,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 11:13:05,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:05,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:05,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1500203540, now seen corresponding path program 1 times [2022-07-19 11:13:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:05,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981021367] [2022-07-19 11:13:05,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:05,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:05,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:13:05,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:05,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981021367] [2022-07-19 11:13:05,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981021367] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:05,419 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:05,419 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:05,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517158464] [2022-07-19 11:13:05,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:05,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:05,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:05,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:05,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:05,421 INFO L87 Difference]: Start difference. First operand 94863 states and 110429 transitions. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 11:13:06,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:06,586 INFO L93 Difference]: Finished difference Result 167798 states and 196240 transitions. [2022-07-19 11:13:06,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:06,587 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 291 [2022-07-19 11:13:06,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:06,676 INFO L225 Difference]: With dead ends: 167798 [2022-07-19 11:13:06,676 INFO L226 Difference]: Without dead ends: 68067 [2022-07-19 11:13:06,727 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 11:13:06,727 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 695 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 695 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:06,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [695 Valid, 45 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68067 states. [2022-07-19 11:13:07,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68067 to 67833. [2022-07-19 11:13:07,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67833 states, 67832 states have (on average 1.0934367260290128) internal successors, (74170), 67832 states have internal predecessors, (74170), 0 states have call successors, (0), 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 11:13:07,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67833 states to 67833 states and 74170 transitions. [2022-07-19 11:13:07,702 INFO L78 Accepts]: Start accepts. Automaton has 67833 states and 74170 transitions. Word has length 291 [2022-07-19 11:13:07,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:07,702 INFO L495 AbstractCegarLoop]: Abstraction has 67833 states and 74170 transitions. [2022-07-19 11:13:07,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 11:13:07,702 INFO L276 IsEmpty]: Start isEmpty. Operand 67833 states and 74170 transitions. [2022-07-19 11:13:07,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-07-19 11:13:07,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:07,721 INFO L195 NwaCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:07,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 11:13:07,721 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:07,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:07,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1717943634, now seen corresponding path program 1 times [2022-07-19 11:13:07,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:07,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199376605] [2022-07-19 11:13:07,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:07,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:07,821 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 11:13:07,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:07,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199376605] [2022-07-19 11:13:07,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199376605] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:07,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:07,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:07,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838697301] [2022-07-19 11:13:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:07,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:07,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:07,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:07,824 INFO L87 Difference]: Start difference. First operand 67833 states and 74170 transitions. Second operand has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 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 11:13:08,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:08,632 INFO L93 Difference]: Finished difference Result 130741 states and 143823 transitions. [2022-07-19 11:13:08,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 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 296 [2022-07-19 11:13:08,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:08,709 INFO L225 Difference]: With dead ends: 130741 [2022-07-19 11:13:08,709 INFO L226 Difference]: Without dead ends: 64331 [2022-07-19 11:13:08,748 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 11:13:08,749 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 151 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:08,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [151 Valid, 122 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:09,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64331 states. [2022-07-19 11:13:09,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64331 to 63316. [2022-07-19 11:13:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63316 states, 63315 states have (on average 1.0763168285556346) internal successors, (68147), 63315 states have internal predecessors, (68147), 0 states have call successors, (0), 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 11:13:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63316 states to 63316 states and 68147 transitions. [2022-07-19 11:13:09,999 INFO L78 Accepts]: Start accepts. Automaton has 63316 states and 68147 transitions. Word has length 296 [2022-07-19 11:13:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:10,000 INFO L495 AbstractCegarLoop]: Abstraction has 63316 states and 68147 transitions. [2022-07-19 11:13:10,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.0) internal successors, (243), 2 states have internal predecessors, (243), 0 states have call successors, (0), 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 11:13:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 63316 states and 68147 transitions. [2022-07-19 11:13:10,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-07-19 11:13:10,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:10,017 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:10,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 11:13:10,018 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:10,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1588882839, now seen corresponding path program 1 times [2022-07-19 11:13:10,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:10,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139265074] [2022-07-19 11:13:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:10,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:10,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:10,105 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 106 proven. 0 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2022-07-19 11:13:10,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:10,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139265074] [2022-07-19 11:13:10,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139265074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:10,106 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:10,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:10,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265213269] [2022-07-19 11:13:10,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:10,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:10,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:10,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:10,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:10,108 INFO L87 Difference]: Start difference. First operand 63316 states and 68147 transitions. Second operand has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 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 11:13:10,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:10,874 INFO L93 Difference]: Finished difference Result 145781 states and 157454 transitions. [2022-07-19 11:13:10,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:10,875 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 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 303 [2022-07-19 11:13:10,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:10,972 INFO L225 Difference]: With dead ends: 145781 [2022-07-19 11:13:10,972 INFO L226 Difference]: Without dead ends: 82467 [2022-07-19 11:13:11,013 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 11:13:11,013 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 207 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:11,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [207 Valid, 136 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:11,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82467 states. [2022-07-19 11:13:12,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82467 to 78991. [2022-07-19 11:13:12,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78991 states, 78990 states have (on average 1.0816559058108621) internal successors, (85440), 78990 states have internal predecessors, (85440), 0 states have call successors, (0), 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 11:13:12,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78991 states to 78991 states and 85440 transitions. [2022-07-19 11:13:12,206 INFO L78 Accepts]: Start accepts. Automaton has 78991 states and 85440 transitions. Word has length 303 [2022-07-19 11:13:12,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:12,206 INFO L495 AbstractCegarLoop]: Abstraction has 78991 states and 85440 transitions. [2022-07-19 11:13:12,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.66666666666667) internal successors, (230), 2 states have internal predecessors, (230), 0 states have call successors, (0), 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 11:13:12,206 INFO L276 IsEmpty]: Start isEmpty. Operand 78991 states and 85440 transitions. [2022-07-19 11:13:12,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2022-07-19 11:13:12,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:12,237 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 11:13:12,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 11:13:12,237 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:12,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:12,238 INFO L85 PathProgramCache]: Analyzing trace with hash -441816732, now seen corresponding path program 1 times [2022-07-19 11:13:12,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:12,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960529743] [2022-07-19 11:13:12,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:12,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:12,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 190 proven. 9 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 11:13:12,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:12,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960529743] [2022-07-19 11:13:12,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960529743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:12,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318836568] [2022-07-19 11:13:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:12,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:12,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:12,423 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 11:13:12,432 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 11:13:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:12,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:12,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 11:13:13,143 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:13,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318836568] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:13,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:13,144 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:13:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399290029] [2022-07-19 11:13:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:13,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:13,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:13,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:13,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:13,146 INFO L87 Difference]: Start difference. First operand 78991 states and 85440 transitions. Second operand has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 11:13:13,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:13,889 INFO L93 Difference]: Finished difference Result 155358 states and 168152 transitions. [2022-07-19 11:13:13,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:13,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 354 [2022-07-19 11:13:13,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:13,980 INFO L225 Difference]: With dead ends: 155358 [2022-07-19 11:13:13,980 INFO L226 Difference]: Without dead ends: 78196 [2022-07-19 11:13:14,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 353 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:14,026 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 86 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:14,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 272 Invalid, 544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78196 states. [2022-07-19 11:13:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78196 to 78179. [2022-07-19 11:13:14,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78179 states, 78178 states have (on average 1.078065440405229) internal successors, (84281), 78178 states have internal predecessors, (84281), 0 states have call successors, (0), 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 11:13:15,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78179 states to 78179 states and 84281 transitions. [2022-07-19 11:13:15,076 INFO L78 Accepts]: Start accepts. Automaton has 78179 states and 84281 transitions. Word has length 354 [2022-07-19 11:13:15,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:15,077 INFO L495 AbstractCegarLoop]: Abstraction has 78179 states and 84281 transitions. [2022-07-19 11:13:15,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.0) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 11:13:15,077 INFO L276 IsEmpty]: Start isEmpty. Operand 78179 states and 84281 transitions. [2022-07-19 11:13:15,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2022-07-19 11:13:15,115 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:15,116 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:15,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 11:13:15,331 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,SelfDestructingSolverStorable16 [2022-07-19 11:13:15,332 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:15,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:15,333 INFO L85 PathProgramCache]: Analyzing trace with hash -393080461, now seen corresponding path program 1 times [2022-07-19 11:13:15,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:15,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845484977] [2022-07-19 11:13:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:15,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:15,484 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 215 proven. 29 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 11:13:15,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845484977] [2022-07-19 11:13:15,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845484977] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:15,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844406831] [2022-07-19 11:13:15,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:15,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:15,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:15,488 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:15,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 11:13:15,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:13:15,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:15,705 INFO L134 CoverageAnalysis]: Checked inductivity of 305 backedges. 244 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 11:13:15,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:15,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844406831] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:15,706 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:15,706 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:13:15,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051665648] [2022-07-19 11:13:15,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:15,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:15,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:15,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:15,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:15,707 INFO L87 Difference]: Start difference. First operand 78179 states and 84281 transitions. Second operand has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:13:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:16,816 INFO L93 Difference]: Finished difference Result 129458 states and 139659 transitions. [2022-07-19 11:13:16,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:16,816 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 362 [2022-07-19 11:13:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:16,879 INFO L225 Difference]: With dead ends: 129458 [2022-07-19 11:13:16,879 INFO L226 Difference]: Without dead ends: 50875 [2022-07-19 11:13:16,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:13:16,917 INFO L413 NwaCegarLoop]: 276 mSDtfsCounter, 203 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:16,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 292 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:13:16,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2022-07-19 11:13:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 46601. [2022-07-19 11:13:17,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46601 states, 46600 states have (on average 1.0630257510729613) internal successors, (49537), 46600 states have internal predecessors, (49537), 0 states have call successors, (0), 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 11:13:17,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46601 states to 46601 states and 49537 transitions. [2022-07-19 11:13:17,744 INFO L78 Accepts]: Start accepts. Automaton has 46601 states and 49537 transitions. Word has length 362 [2022-07-19 11:13:17,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:17,744 INFO L495 AbstractCegarLoop]: Abstraction has 46601 states and 49537 transitions. [2022-07-19 11:13:17,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 100.66666666666667) internal successors, (302), 3 states have internal predecessors, (302), 0 states have call successors, (0), 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 11:13:17,744 INFO L276 IsEmpty]: Start isEmpty. Operand 46601 states and 49537 transitions. [2022-07-19 11:13:17,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-07-19 11:13:17,779 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:17,779 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-19 11:13:17,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 11:13:17,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 11:13:17,987 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:17,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:17,988 INFO L85 PathProgramCache]: Analyzing trace with hash 67321743, now seen corresponding path program 1 times [2022-07-19 11:13:17,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:17,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831761999] [2022-07-19 11:13:17,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:17,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:18,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 293 backedges. 215 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 11:13:18,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831761999] [2022-07-19 11:13:18,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831761999] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:18,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:18,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:13:18,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366879441] [2022-07-19 11:13:18,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:18,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:18,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:18,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:18,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:18,180 INFO L87 Difference]: Start difference. First operand 46601 states and 49537 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 11:13:18,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:18,813 INFO L93 Difference]: Finished difference Result 91780 states and 97615 transitions. [2022-07-19 11:13:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:18,813 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 392 [2022-07-19 11:13:18,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:18,862 INFO L225 Difference]: With dead ends: 91780 [2022-07-19 11:13:18,862 INFO L226 Difference]: Without dead ends: 46602 [2022-07-19 11:13:18,892 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 11:13:18,893 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 70 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:18,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 116 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46602 states. [2022-07-19 11:13:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46602 to 46601. [2022-07-19 11:13:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46601 states, 46600 states have (on average 1.0628969957081544) internal successors, (49531), 46600 states have internal predecessors, (49531), 0 states have call successors, (0), 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 11:13:19,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46601 states to 46601 states and 49531 transitions. [2022-07-19 11:13:19,701 INFO L78 Accepts]: Start accepts. Automaton has 46601 states and 49531 transitions. Word has length 392 [2022-07-19 11:13:19,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:19,701 INFO L495 AbstractCegarLoop]: Abstraction has 46601 states and 49531 transitions. [2022-07-19 11:13:19,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 2 states have internal predecessors, (315), 0 states have call successors, (0), 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 11:13:19,702 INFO L276 IsEmpty]: Start isEmpty. Operand 46601 states and 49531 transitions. [2022-07-19 11:13:19,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-07-19 11:13:19,733 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:19,733 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-19 11:13:19,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:13:19,734 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1353325147, now seen corresponding path program 1 times [2022-07-19 11:13:19,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:19,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399501476] [2022-07-19 11:13:19,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:19,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:19,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 224 proven. 12 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 11:13:19,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:19,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399501476] [2022-07-19 11:13:19,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399501476] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:19,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112243787] [2022-07-19 11:13:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:19,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:19,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:19,918 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:19,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 11:13:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:20,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 647 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:13:20,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:20,267 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 308 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:13:20,267 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:20,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112243787] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:20,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:20,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-07-19 11:13:20,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151283173] [2022-07-19 11:13:20,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:20,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:20,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:20,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:20,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:20,272 INFO L87 Difference]: Start difference. First operand 46601 states and 49531 transitions. Second operand has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 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 11:13:20,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:20,977 INFO L93 Difference]: Finished difference Result 93830 states and 99860 transitions. [2022-07-19 11:13:20,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:20,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 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 400 [2022-07-19 11:13:20,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:21,029 INFO L225 Difference]: With dead ends: 93830 [2022-07-19 11:13:21,030 INFO L226 Difference]: Without dead ends: 48652 [2022-07-19 11:13:21,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 400 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:21,058 INFO L413 NwaCegarLoop]: 317 mSDtfsCounter, 135 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:21,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 332 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:21,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48652 states. [2022-07-19 11:13:21,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48652 to 45579. [2022-07-19 11:13:21,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45579 states, 45578 states have (on average 1.0597876168326825) internal successors, (48303), 45578 states have internal predecessors, (48303), 0 states have call successors, (0), 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 11:13:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45579 states to 45579 states and 48303 transitions. [2022-07-19 11:13:21,766 INFO L78 Accepts]: Start accepts. Automaton has 45579 states and 48303 transitions. Word has length 400 [2022-07-19 11:13:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:21,767 INFO L495 AbstractCegarLoop]: Abstraction has 45579 states and 48303 transitions. [2022-07-19 11:13:21,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.66666666666666) internal successors, (395), 3 states have internal predecessors, (395), 0 states have call successors, (0), 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 11:13:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 45579 states and 48303 transitions. [2022-07-19 11:13:21,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-07-19 11:13:21,798 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:21,798 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:21,819 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-19 11:13:22,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:22,007 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:22,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:22,008 INFO L85 PathProgramCache]: Analyzing trace with hash -2084760706, now seen corresponding path program 1 times [2022-07-19 11:13:22,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:22,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219001485] [2022-07-19 11:13:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:22,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:22,164 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 333 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 11:13:22,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:22,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219001485] [2022-07-19 11:13:22,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219001485] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:22,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:22,165 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:22,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894139373] [2022-07-19 11:13:22,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:22,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:22,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:22,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:22,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:22,167 INFO L87 Difference]: Start difference. First operand 45579 states and 48303 transitions. Second operand has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 11:13:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:23,000 INFO L93 Difference]: Finished difference Result 109064 states and 115591 transitions. [2022-07-19 11:13:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 403 [2022-07-19 11:13:23,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:23,076 INFO L225 Difference]: With dead ends: 109064 [2022-07-19 11:13:23,076 INFO L226 Difference]: Without dead ends: 64705 [2022-07-19 11:13:23,110 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 11:13:23,111 INFO L413 NwaCegarLoop]: 199 mSDtfsCounter, 388 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:23,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 386 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:13:23,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64705 states. [2022-07-19 11:13:23,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64705 to 63683. [2022-07-19 11:13:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63683 states, 63682 states have (on average 1.0586979052165446) internal successors, (67420), 63682 states have internal predecessors, (67420), 0 states have call successors, (0), 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 11:13:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63683 states to 63683 states and 67420 transitions. [2022-07-19 11:13:24,024 INFO L78 Accepts]: Start accepts. Automaton has 63683 states and 67420 transitions. Word has length 403 [2022-07-19 11:13:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:24,024 INFO L495 AbstractCegarLoop]: Abstraction has 63683 states and 67420 transitions. [2022-07-19 11:13:24,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.5) internal successors, (326), 3 states have internal predecessors, (326), 0 states have call successors, (0), 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 11:13:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 63683 states and 67420 transitions. [2022-07-19 11:13:24,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2022-07-19 11:13:24,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:24,058 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 11:13:24,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-19 11:13:24,058 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:24,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1428899627, now seen corresponding path program 1 times [2022-07-19 11:13:24,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:24,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079251130] [2022-07-19 11:13:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:24,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:24,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:24,406 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 290 proven. 58 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 11:13:24,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079251130] [2022-07-19 11:13:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079251130] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379370552] [2022-07-19 11:13:24,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:24,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:24,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:24,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 11:13:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:24,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:24,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 368 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:13:25,099 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:25,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379370552] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:25,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:25,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2022-07-19 11:13:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133406995] [2022-07-19 11:13:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:25,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:25,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:13:25,102 INFO L87 Difference]: Start difference. First operand 63683 states and 67420 transitions. Second operand has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 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 11:13:25,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:25,899 INFO L93 Difference]: Finished difference Result 126140 states and 133547 transitions. [2022-07-19 11:13:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:25,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 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 408 [2022-07-19 11:13:25,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:25,971 INFO L225 Difference]: With dead ends: 126140 [2022-07-19 11:13:25,971 INFO L226 Difference]: Without dead ends: 63270 [2022-07-19 11:13:26,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 11:13:26,008 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 161 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:26,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 95 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63270 states. [2022-07-19 11:13:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63270 to 60217. [2022-07-19 11:13:26,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60217 states, 60216 states have (on average 1.0528264912979939) internal successors, (63397), 60216 states have internal predecessors, (63397), 0 states have call successors, (0), 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 11:13:26,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60217 states to 60217 states and 63397 transitions. [2022-07-19 11:13:26,973 INFO L78 Accepts]: Start accepts. Automaton has 60217 states and 63397 transitions. Word has length 408 [2022-07-19 11:13:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:26,974 INFO L495 AbstractCegarLoop]: Abstraction has 60217 states and 63397 transitions. [2022-07-19 11:13:26,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.0) internal successors, (351), 3 states have internal predecessors, (351), 0 states have call successors, (0), 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 11:13:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 60217 states and 63397 transitions. [2022-07-19 11:13:27,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2022-07-19 11:13:27,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:27,003 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:27,020 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 11:13:27,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 11:13:27,204 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:27,205 INFO L85 PathProgramCache]: Analyzing trace with hash -2000446158, now seen corresponding path program 1 times [2022-07-19 11:13:27,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:27,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616371404] [2022-07-19 11:13:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:27,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:27,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 153 proven. 252 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-07-19 11:13:27,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616371404] [2022-07-19 11:13:27,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616371404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:27,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768389490] [2022-07-19 11:13:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:27,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:27,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:27,557 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 11:13:27,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 11:13:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:27,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:13:27,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2022-07-19 11:13:27,924 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:27,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768389490] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:27,925 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:27,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:13:27,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519820460] [2022-07-19 11:13:27,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:27,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:27,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:27,927 INFO L87 Difference]: Start difference. First operand 60217 states and 63397 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 11:13:28,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:28,648 INFO L93 Difference]: Finished difference Result 122079 states and 128707 transitions. [2022-07-19 11:13:28,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:28,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 430 [2022-07-19 11:13:28,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:28,649 INFO L225 Difference]: With dead ends: 122079 [2022-07-19 11:13:28,649 INFO L226 Difference]: Without dead ends: 0 [2022-07-19 11:13:28,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:28,686 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 52 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:28,687 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 312 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:28,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-07-19 11:13:28,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-07-19 11:13:28,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 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 11:13:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-07-19 11:13:28,688 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 430 [2022-07-19 11:13:28,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:28,689 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-07-19 11:13:28,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 11:13:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-07-19 11:13:28,689 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-07-19 11:13:28,691 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-19 11:13:28,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 11:13:28,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:28,897 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-07-19 11:13:39,286 WARN L233 SmtUtils]: Spent 5.89s on a formula simplification. DAG size of input: 543 DAG size of output: 94 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)