./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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_label03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 270b49fc6fbf3a6d565e1c23dc80c7cece24e766c52320c8c625102e15c9685f --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-12 00:00:00,994 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-12 00:00:00,996 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-12 00:00:01,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-12 00:00:01,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-12 00:00:01,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-12 00:00:01,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-12 00:00:01,025 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-12 00:00:01,027 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-12 00:00:01,027 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-12 00:00:01,028 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-12 00:00:01,029 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-12 00:00:01,030 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-12 00:00:01,031 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-12 00:00:01,032 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-12 00:00:01,033 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-12 00:00:01,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-12 00:00:01,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-12 00:00:01,035 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-12 00:00:01,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-12 00:00:01,038 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-12 00:00:01,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-12 00:00:01,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-12 00:00:01,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-12 00:00:01,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-12 00:00:01,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-12 00:00:01,044 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-12 00:00:01,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-12 00:00:01,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-12 00:00:01,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-12 00:00:01,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-12 00:00:01,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-12 00:00:01,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-12 00:00:01,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-12 00:00:01,049 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-12 00:00:01,050 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-12 00:00:01,050 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-12 00:00:01,051 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-12 00:00:01,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-12 00:00:01,052 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-12 00:00:01,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-12 00:00:01,055 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-12 00:00:01,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-12 00:00:01,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-12 00:00:01,080 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-12 00:00:01,080 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-12 00:00:01,080 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-12 00:00:01,081 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-12 00:00:01,081 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-12 00:00:01,082 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-12 00:00:01,082 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-12 00:00:01,082 INFO L138 SettingsManager]: * Use SBE=true [2022-07-12 00:00:01,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-12 00:00:01,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-12 00:00:01,083 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-12 00:00:01,084 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-12 00:00:01,084 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-12 00:00:01,084 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-12 00:00:01,084 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-12 00:00:01,084 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-12 00:00:01,085 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-12 00:00:01,085 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-12 00:00:01,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 00:00:01,085 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-12 00:00:01,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-12 00:00:01,086 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-12 00:00:01,087 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 270b49fc6fbf3a6d565e1c23dc80c7cece24e766c52320c8c625102e15c9685f [2022-07-12 00:00:01,311 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-12 00:00:01,343 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-12 00:00:01,345 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-12 00:00:01,346 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-12 00:00:01,347 INFO L275 PluginConnector]: CDTParser initialized [2022-07-12 00:00:01,349 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2022-07-12 00:00:01,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558699fa3/12bbadd32ffe491a978fc6c5b51ad4e3/FLAG5d43696f2 [2022-07-12 00:00:01,980 INFO L306 CDTParser]: Found 1 translation units. [2022-07-12 00:00:01,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label03.c [2022-07-12 00:00:01,999 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558699fa3/12bbadd32ffe491a978fc6c5b51ad4e3/FLAG5d43696f2 [2022-07-12 00:00:02,268 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/558699fa3/12bbadd32ffe491a978fc6c5b51ad4e3 [2022-07-12 00:00:02,272 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-12 00:00:02,273 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-12 00:00:02,277 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-12 00:00:02,278 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-12 00:00:02,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-12 00:00:02,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 12:00:02" (1/1) ... [2022-07-12 00:00:02,282 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28ada466 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:02, skipping insertion in model container [2022-07-12 00:00:02,282 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.07 12:00:02" (1/1) ... [2022-07-12 00:00:02,288 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-12 00:00:02,360 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-12 00:00:02,827 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_label03.c[56355,56368] [2022-07-12 00:00:02,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 00:00:02,891 INFO L203 MainTranslator]: Completed pre-run [2022-07-12 00:00:03,186 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_label03.c[56355,56368] [2022-07-12 00:00:03,200 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-12 00:00:03,217 INFO L208 MainTranslator]: Completed translation [2022-07-12 00:00:03,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03 WrapperNode [2022-07-12 00:00:03,217 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-12 00:00:03,218 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-12 00:00:03,219 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-12 00:00:03,219 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-12 00:00:03,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,342 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-12 00:00:03,343 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-12 00:00:03,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-12 00:00:03,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-12 00:00:03,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-12 00:00:03,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,361 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,362 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,449 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,482 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-12 00:00:03,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-12 00:00:03,497 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-12 00:00:03,497 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-12 00:00:03,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (1/1) ... [2022-07-12 00:00:03,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-12 00:00:03,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:03,533 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) [2022-07-12 00:00:03,547 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 [2022-07-12 00:00:03,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-12 00:00:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-12 00:00:03,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-12 00:00:03,575 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-12 00:00:03,688 INFO L234 CfgBuilder]: Building ICFG [2022-07-12 00:00:03,689 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-12 00:00:05,184 INFO L275 CfgBuilder]: Performing block encoding [2022-07-12 00:00:05,199 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-12 00:00:05,200 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-12 00:00:05,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 12:00:05 BoogieIcfgContainer [2022-07-12 00:00:05,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-12 00:00:05,205 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-12 00:00:05,206 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-12 00:00:05,208 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-12 00:00:05,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.07 12:00:02" (1/3) ... [2022-07-12 00:00:05,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39365753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 12:00:05, skipping insertion in model container [2022-07-12 00:00:05,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.07 12:00:03" (2/3) ... [2022-07-12 00:00:05,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39365753 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.07 12:00:05, skipping insertion in model container [2022-07-12 00:00:05,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.07 12:00:05" (3/3) ... [2022-07-12 00:00:05,211 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label03.c [2022-07-12 00:00:05,224 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-12 00:00:05,224 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-12 00:00:05,307 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-12 00:00:05,328 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@f600386, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4c0d0e [2022-07-12 00:00:05,328 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-12 00:00:05,342 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) [2022-07-12 00:00:05,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-07-12 00:00:05,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:05,369 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] [2022-07-12 00:00:05,370 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:05,387 INFO L85 PathProgramCache]: Analyzing trace with hash 303295378, now seen corresponding path program 1 times [2022-07-12 00:00:05,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:05,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951882834] [2022-07-12 00:00:05,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:05,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:05,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:05,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951882834] [2022-07-12 00:00:05,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951882834] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:05,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:05,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:05,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158975801] [2022-07-12 00:00:05,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:05,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:05,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:06,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:06,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:06,049 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 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:06,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:06,949 INFO L93 Difference]: Finished difference Result 810 states and 1445 transitions. [2022-07-12 00:00:06,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:06,952 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2022-07-12 00:00:06,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:06,969 INFO L225 Difference]: With dead ends: 810 [2022-07-12 00:00:06,969 INFO L226 Difference]: Without dead ends: 444 [2022-07-12 00:00:06,976 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 [2022-07-12 00:00:06,981 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 90 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:06,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 231 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 00:00:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-07-12 00:00:07,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 444. [2022-07-12 00:00:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.4288939051918736) internal successors, (633), 443 states have internal predecessors, (633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:07,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 633 transitions. [2022-07-12 00:00:07,061 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 633 transitions. Word has length 164 [2022-07-12 00:00:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:07,063 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 633 transitions. [2022-07-12 00:00:07,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:07,064 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 633 transitions. [2022-07-12 00:00:07,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-07-12 00:00:07,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:07,075 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] [2022-07-12 00:00:07,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-12 00:00:07,076 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:07,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1704238513, now seen corresponding path program 1 times [2022-07-12 00:00:07,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:07,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081482512] [2022-07-12 00:00:07,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:07,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:07,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:07,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081482512] [2022-07-12 00:00:07,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081482512] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:07,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:07,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:07,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781220685] [2022-07-12 00:00:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:07,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:07,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:07,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:07,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:07,226 INFO L87 Difference]: Start difference. First operand 444 states and 633 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:07,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:07,897 INFO L93 Difference]: Finished difference Result 1312 states and 1878 transitions. [2022-07-12 00:00:07,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:07,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2022-07-12 00:00:07,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:07,902 INFO L225 Difference]: With dead ends: 1312 [2022-07-12 00:00:07,902 INFO L226 Difference]: Without dead ends: 870 [2022-07-12 00:00:07,911 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 [2022-07-12 00:00:07,912 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:07,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:07,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2022-07-12 00:00:07,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 856. [2022-07-12 00:00:07,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3953216374269006) internal successors, (1193), 855 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:07,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1193 transitions. [2022-07-12 00:00:07,953 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1193 transitions. Word has length 172 [2022-07-12 00:00:07,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:07,953 INFO L495 AbstractCegarLoop]: Abstraction has 856 states and 1193 transitions. [2022-07-12 00:00:07,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 2 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:07,954 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1193 transitions. [2022-07-12 00:00:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-12 00:00:07,956 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:07,956 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:07,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-12 00:00:07,958 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:07,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:07,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1955143716, now seen corresponding path program 1 times [2022-07-12 00:00:07,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:07,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068420860] [2022-07-12 00:00:07,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:07,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:08,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:08,182 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 00:00:08,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:08,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068420860] [2022-07-12 00:00:08,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068420860] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:08,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:08,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:08,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193621278] [2022-07-12 00:00:08,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:08,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:08,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:08,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:08,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:08,186 INFO L87 Difference]: Start difference. First operand 856 states and 1193 transitions. Second operand has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:08,933 INFO L93 Difference]: Finished difference Result 2530 states and 3532 transitions. [2022-07-12 00:00:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:08,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 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 179 [2022-07-12 00:00:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:08,941 INFO L225 Difference]: With dead ends: 2530 [2022-07-12 00:00:08,942 INFO L226 Difference]: Without dead ends: 1676 [2022-07-12 00:00:08,944 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 [2022-07-12 00:00:08,945 INFO L413 NwaCegarLoop]: 327 mSDtfsCounter, 101 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:08,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 357 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:08,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1676 states. [2022-07-12 00:00:08,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1676 to 1671. [2022-07-12 00:00:09,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 1.3323353293413174) internal successors, (2225), 1670 states have internal predecessors, (2225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:09,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 2225 transitions. [2022-07-12 00:00:09,027 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 2225 transitions. Word has length 179 [2022-07-12 00:00:09,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:09,028 INFO L495 AbstractCegarLoop]: Abstraction has 1671 states and 2225 transitions. [2022-07-12 00:00:09,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.0) internal successors, (174), 3 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:09,028 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 2225 transitions. [2022-07-12 00:00:09,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-07-12 00:00:09,032 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:09,032 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 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] [2022-07-12 00:00:09,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-12 00:00:09,033 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:09,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:09,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1792558056, now seen corresponding path program 1 times [2022-07-12 00:00:09,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:09,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370012399] [2022-07-12 00:00:09,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:09,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 00:00:09,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:09,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370012399] [2022-07-12 00:00:09,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370012399] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:09,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:09,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:09,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938593962] [2022-07-12 00:00:09,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:09,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:09,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:09,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:09,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:09,146 INFO L87 Difference]: Start difference. First operand 1671 states and 2225 transitions. Second operand has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:09,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:09,837 INFO L93 Difference]: Finished difference Result 4162 states and 5493 transitions. [2022-07-12 00:00:09,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:09,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 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 185 [2022-07-12 00:00:09,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:09,851 INFO L225 Difference]: With dead ends: 4162 [2022-07-12 00:00:09,851 INFO L226 Difference]: Without dead ends: 2493 [2022-07-12 00:00:09,855 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 [2022-07-12 00:00:09,864 INFO L413 NwaCegarLoop]: 345 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:09,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 368 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:09,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2493 states. [2022-07-12 00:00:09,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2493 to 2489. [2022-07-12 00:00:09,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 1.2885852090032155) internal successors, (3206), 2488 states have internal predecessors, (3206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:09,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 3206 transitions. [2022-07-12 00:00:09,928 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 3206 transitions. Word has length 185 [2022-07-12 00:00:09,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:09,929 INFO L495 AbstractCegarLoop]: Abstraction has 2489 states and 3206 transitions. [2022-07-12 00:00:09,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.0) internal successors, (180), 3 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:09,930 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 3206 transitions. [2022-07-12 00:00:09,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-07-12 00:00:09,935 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:09,935 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:09,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-12 00:00:09,935 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:09,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:09,936 INFO L85 PathProgramCache]: Analyzing trace with hash -669662216, now seen corresponding path program 1 times [2022-07-12 00:00:09,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:09,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528890409] [2022-07-12 00:00:09,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:09,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:10,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:10,051 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:10,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:10,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528890409] [2022-07-12 00:00:10,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528890409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:10,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:10,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:10,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346533766] [2022-07-12 00:00:10,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:10,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:10,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:10,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:10,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:10,056 INFO L87 Difference]: Start difference. First operand 2489 states and 3206 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:10,839 INFO L93 Difference]: Finished difference Result 7030 states and 9147 transitions. [2022-07-12 00:00:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 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 [2022-07-12 00:00:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:10,861 INFO L225 Difference]: With dead ends: 7030 [2022-07-12 00:00:10,862 INFO L226 Difference]: Without dead ends: 4543 [2022-07-12 00:00:10,868 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 [2022-07-12 00:00:10,869 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 217 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:10,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 161 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:10,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4543 states. [2022-07-12 00:00:10,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4543 to 4537. [2022-07-12 00:00:10,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4537 states, 4536 states have (on average 1.2757936507936507) internal successors, (5787), 4536 states have internal predecessors, (5787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:10,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4537 states to 4537 states and 5787 transitions. [2022-07-12 00:00:10,965 INFO L78 Accepts]: Start accepts. Automaton has 4537 states and 5787 transitions. Word has length 192 [2022-07-12 00:00:10,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:10,967 INFO L495 AbstractCegarLoop]: Abstraction has 4537 states and 5787 transitions. [2022-07-12 00:00:10,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 2 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 4537 states and 5787 transitions. [2022-07-12 00:00:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-07-12 00:00:10,977 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:10,977 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 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] [2022-07-12 00:00:10,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-12 00:00:10,978 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:10,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:10,979 INFO L85 PathProgramCache]: Analyzing trace with hash 858730448, now seen corresponding path program 1 times [2022-07-12 00:00:10,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74665507] [2022-07-12 00:00:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:10,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:11,078 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 00:00:11,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:11,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74665507] [2022-07-12 00:00:11,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74665507] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:11,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:11,080 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:11,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968726353] [2022-07-12 00:00:11,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:11,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:11,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:11,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:11,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:11,082 INFO L87 Difference]: Start difference. First operand 4537 states and 5787 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) [2022-07-12 00:00:11,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:11,886 INFO L93 Difference]: Finished difference Result 10716 states and 13759 transitions. [2022-07-12 00:00:11,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:11,887 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 198 [2022-07-12 00:00:11,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:11,912 INFO L225 Difference]: With dead ends: 10716 [2022-07-12 00:00:11,913 INFO L226 Difference]: Without dead ends: 6181 [2022-07-12 00:00:11,920 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 [2022-07-12 00:00:11,921 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 216 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 170 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 170 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:11,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 362 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [170 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:11,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6181 states. [2022-07-12 00:00:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6181 to 6166. [2022-07-12 00:00:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6166 states, 6165 states have (on average 1.2491484184914843) internal successors, (7701), 6165 states have internal predecessors, (7701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:12,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6166 states to 6166 states and 7701 transitions. [2022-07-12 00:00:12,094 INFO L78 Accepts]: Start accepts. Automaton has 6166 states and 7701 transitions. Word has length 198 [2022-07-12 00:00:12,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:12,094 INFO L495 AbstractCegarLoop]: Abstraction has 6166 states and 7701 transitions. [2022-07-12 00:00:12,095 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) [2022-07-12 00:00:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 6166 states and 7701 transitions. [2022-07-12 00:00:12,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-12 00:00:12,105 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:12,105 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:12,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-12 00:00:12,106 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 780021312, now seen corresponding path program 1 times [2022-07-12 00:00:12,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:12,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958606872] [2022-07-12 00:00:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:12,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-12 00:00:12,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:12,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958606872] [2022-07-12 00:00:12,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958606872] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:12,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:12,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:12,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774992549] [2022-07-12 00:00:12,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:12,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:12,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:12,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:12,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:12,174 INFO L87 Difference]: Start difference. First operand 6166 states and 7701 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:12,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:12,968 INFO L93 Difference]: Finished difference Result 16204 states and 20267 transitions. [2022-07-12 00:00:12,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:12,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 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 211 [2022-07-12 00:00:12,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:13,005 INFO L225 Difference]: With dead ends: 16204 [2022-07-12 00:00:13,005 INFO L226 Difference]: Without dead ends: 10040 [2022-07-12 00:00:13,012 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 [2022-07-12 00:00:13,013 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 241 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:13,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [241 Valid, 195 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10040 states. [2022-07-12 00:00:13,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10040 to 9834. [2022-07-12 00:00:13,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9834 states, 9833 states have (on average 1.214278450116953) internal successors, (11940), 9833 states have internal predecessors, (11940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:13,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9834 states to 9834 states and 11940 transitions. [2022-07-12 00:00:13,200 INFO L78 Accepts]: Start accepts. Automaton has 9834 states and 11940 transitions. Word has length 211 [2022-07-12 00:00:13,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:13,200 INFO L495 AbstractCegarLoop]: Abstraction has 9834 states and 11940 transitions. [2022-07-12 00:00:13,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:13,201 INFO L276 IsEmpty]: Start isEmpty. Operand 9834 states and 11940 transitions. [2022-07-12 00:00:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-07-12 00:00:13,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:13,217 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, 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] [2022-07-12 00:00:13,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-12 00:00:13,218 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:13,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:13,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1990666119, now seen corresponding path program 1 times [2022-07-12 00:00:13,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:13,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264389245] [2022-07-12 00:00:13,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:13,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:13,354 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 00:00:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:13,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264389245] [2022-07-12 00:00:13,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264389245] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:13,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:13,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:13,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012435595] [2022-07-12 00:00:13,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:13,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:13,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:13,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:13,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:13,357 INFO L87 Difference]: Start difference. First operand 9834 states and 11940 transitions. Second operand has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:14,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:14,253 INFO L93 Difference]: Finished difference Result 25185 states and 30805 transitions. [2022-07-12 00:00:14,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:14,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 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 222 [2022-07-12 00:00:14,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:14,289 INFO L225 Difference]: With dead ends: 25185 [2022-07-12 00:00:14,289 INFO L226 Difference]: Without dead ends: 15353 [2022-07-12 00:00:14,303 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 [2022-07-12 00:00:14,304 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:14,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 240 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 00:00:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15353 states. [2022-07-12 00:00:14,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15353 to 15326. [2022-07-12 00:00:14,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15326 states, 15325 states have (on average 1.2236867862969005) internal successors, (18753), 15325 states have internal predecessors, (18753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:14,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15326 states to 15326 states and 18753 transitions. [2022-07-12 00:00:14,590 INFO L78 Accepts]: Start accepts. Automaton has 15326 states and 18753 transitions. Word has length 222 [2022-07-12 00:00:14,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:14,591 INFO L495 AbstractCegarLoop]: Abstraction has 15326 states and 18753 transitions. [2022-07-12 00:00:14,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.0) internal successors, (195), 2 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:14,592 INFO L276 IsEmpty]: Start isEmpty. Operand 15326 states and 18753 transitions. [2022-07-12 00:00:14,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-07-12 00:00:14,619 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:14,619 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, 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] [2022-07-12 00:00:14,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-12 00:00:14,620 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:14,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:14,620 INFO L85 PathProgramCache]: Analyzing trace with hash -2101530961, now seen corresponding path program 1 times [2022-07-12 00:00:14,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:14,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669352868] [2022-07-12 00:00:14,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:14,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:14,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:14,717 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 00:00:14,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:14,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669352868] [2022-07-12 00:00:14,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669352868] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:14,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:14,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:14,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8071533] [2022-07-12 00:00:14,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:14,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:14,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:14,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:14,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:14,720 INFO L87 Difference]: Start difference. First operand 15326 states and 18753 transitions. Second operand has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:15,677 INFO L93 Difference]: Finished difference Result 42277 states and 51957 transitions. [2022-07-12 00:00:15,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:15,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 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 [2022-07-12 00:00:15,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:15,741 INFO L225 Difference]: With dead ends: 42277 [2022-07-12 00:00:15,742 INFO L226 Difference]: Without dead ends: 26953 [2022-07-12 00:00:15,760 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 [2022-07-12 00:00:15,761 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 243 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:15,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 224 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 755 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:15,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26953 states. [2022-07-12 00:00:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26953 to 26940. [2022-07-12 00:00:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26940 states, 26939 states have (on average 1.2239504064738855) internal successors, (32972), 26939 states have internal predecessors, (32972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26940 states to 26940 states and 32972 transitions. [2022-07-12 00:00:16,219 INFO L78 Accepts]: Start accepts. Automaton has 26940 states and 32972 transitions. Word has length 226 [2022-07-12 00:00:16,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:16,220 INFO L495 AbstractCegarLoop]: Abstraction has 26940 states and 32972 transitions. [2022-07-12 00:00:16,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.33333333333333) internal successors, (199), 2 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 26940 states and 32972 transitions. [2022-07-12 00:00:16,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-07-12 00:00:16,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:16,252 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:16,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-12 00:00:16,252 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:16,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1429918891, now seen corresponding path program 1 times [2022-07-12 00:00:16,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:16,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725864408] [2022-07-12 00:00:16,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:16,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-12 00:00:16,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:16,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725864408] [2022-07-12 00:00:16,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725864408] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:16,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:16,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811854419] [2022-07-12 00:00:16,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:16,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:16,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:16,483 INFO L87 Difference]: Start difference. First operand 26940 states and 32972 transitions. Second operand has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:17,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:17,332 INFO L93 Difference]: Finished difference Result 58139 states and 72114 transitions. [2022-07-12 00:00:17,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:17,333 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 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 236 [2022-07-12 00:00:17,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:17,474 INFO L225 Difference]: With dead ends: 58139 [2022-07-12 00:00:17,474 INFO L226 Difference]: Without dead ends: 31404 [2022-07-12 00:00:17,499 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 [2022-07-12 00:00:17,500 INFO L413 NwaCegarLoop]: 378 mSDtfsCounter, 188 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:17,501 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 406 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:17,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31404 states. [2022-07-12 00:00:17,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31404 to 30383. [2022-07-12 00:00:17,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30383 states, 30382 states have (on average 1.1827397801329735) internal successors, (35934), 30382 states have internal predecessors, (35934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30383 states to 30383 states and 35934 transitions. [2022-07-12 00:00:17,946 INFO L78 Accepts]: Start accepts. Automaton has 30383 states and 35934 transitions. Word has length 236 [2022-07-12 00:00:17,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:17,946 INFO L495 AbstractCegarLoop]: Abstraction has 30383 states and 35934 transitions. [2022-07-12 00:00:17,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:17,947 INFO L276 IsEmpty]: Start isEmpty. Operand 30383 states and 35934 transitions. [2022-07-12 00:00:17,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-07-12 00:00:17,976 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:17,976 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:17,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-12 00:00:17,977 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:17,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash -118373097, now seen corresponding path program 1 times [2022-07-12 00:00:17,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331539690] [2022-07-12 00:00:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:17,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:18,174 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 74 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:18,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:18,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331539690] [2022-07-12 00:00:18,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331539690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:18,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:18,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:18,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091732978] [2022-07-12 00:00:18,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:18,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:18,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:18,177 INFO L87 Difference]: Start difference. First operand 30383 states and 35934 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:19,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:19,126 INFO L93 Difference]: Finished difference Result 61194 states and 72869 transitions. [2022-07-12 00:00:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:19,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2022-07-12 00:00:19,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:19,192 INFO L225 Difference]: With dead ends: 61194 [2022-07-12 00:00:19,192 INFO L226 Difference]: Without dead ends: 40997 [2022-07-12 00:00:19,218 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 [2022-07-12 00:00:19,219 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 171 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:19,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [171 Valid, 251 Invalid, 788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 775 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40997 states. [2022-07-12 00:00:19,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40997 to 37709. [2022-07-12 00:00:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37709 states, 37708 states have (on average 1.1973321311127612) internal successors, (45149), 37708 states have internal predecessors, (45149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37709 states to 37709 states and 45149 transitions. [2022-07-12 00:00:20,157 INFO L78 Accepts]: Start accepts. Automaton has 37709 states and 45149 transitions. Word has length 239 [2022-07-12 00:00:20,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:20,157 INFO L495 AbstractCegarLoop]: Abstraction has 37709 states and 45149 transitions. [2022-07-12 00:00:20,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 2 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:20,158 INFO L276 IsEmpty]: Start isEmpty. Operand 37709 states and 45149 transitions. [2022-07-12 00:00:20,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2022-07-12 00:00:20,185 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:20,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:20,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-12 00:00:20,186 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:20,187 INFO L85 PathProgramCache]: Analyzing trace with hash -224143076, now seen corresponding path program 1 times [2022-07-12 00:00:20,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:20,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908826184] [2022-07-12 00:00:20,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:20,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 99 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 00:00:20,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:20,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908826184] [2022-07-12 00:00:20,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908826184] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:20,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:20,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:20,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555143745] [2022-07-12 00:00:20,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:20,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 00:00:20,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:20,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 00:00:20,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 00:00:20,319 INFO L87 Difference]: Start difference. First operand 37709 states and 45149 transitions. Second operand has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:21,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:21,267 INFO L93 Difference]: Finished difference Result 68655 states and 82313 transitions. [2022-07-12 00:00:21,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 00:00:21,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 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 252 [2022-07-12 00:00:21,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:21,307 INFO L225 Difference]: With dead ends: 68655 [2022-07-12 00:00:21,307 INFO L226 Difference]: Without dead ends: 31968 [2022-07-12 00:00:21,331 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 [2022-07-12 00:00:21,333 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 520 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:21,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [520 Valid, 59 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:21,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31968 states. [2022-07-12 00:00:21,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31968 to 31764. [2022-07-12 00:00:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31764 states, 31763 states have (on average 1.1127097566350785) internal successors, (35343), 31763 states have internal predecessors, (35343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:21,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31764 states to 31764 states and 35343 transitions. [2022-07-12 00:00:21,873 INFO L78 Accepts]: Start accepts. Automaton has 31764 states and 35343 transitions. Word has length 252 [2022-07-12 00:00:21,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:21,873 INFO L495 AbstractCegarLoop]: Abstraction has 31764 states and 35343 transitions. [2022-07-12 00:00:21,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 61.75) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:21,874 INFO L276 IsEmpty]: Start isEmpty. Operand 31764 states and 35343 transitions. [2022-07-12 00:00:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-12 00:00:21,891 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:21,891 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 00:00:21,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-12 00:00:21,892 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:21,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:21,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1480951868, now seen corresponding path program 1 times [2022-07-12 00:00:21,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:21,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428853858] [2022-07-12 00:00:21,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:21,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 128 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:22,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:22,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428853858] [2022-07-12 00:00:22,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428853858] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:22,047 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:22,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:22,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444634709] [2022-07-12 00:00:22,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:22,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:22,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:22,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:22,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:22,049 INFO L87 Difference]: Start difference. First operand 31764 states and 35343 transitions. Second operand has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:22,758 INFO L93 Difference]: Finished difference Result 56806 states and 63148 transitions. [2022-07-12 00:00:22,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-07-12 00:00:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:22,791 INFO L225 Difference]: With dead ends: 56806 [2022-07-12 00:00:22,791 INFO L226 Difference]: Without dead ends: 25452 [2022-07-12 00:00:22,808 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 [2022-07-12 00:00:22,809 INFO L413 NwaCegarLoop]: 282 mSDtfsCounter, 209 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:22,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 297 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:22,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25452 states. [2022-07-12 00:00:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25452 to 23418. [2022-07-12 00:00:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23418 states, 23417 states have (on average 1.0791732502028442) internal successors, (25271), 23417 states have internal predecessors, (25271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23418 states to 23418 states and 25271 transitions. [2022-07-12 00:00:23,274 INFO L78 Accepts]: Start accepts. Automaton has 23418 states and 25271 transitions. Word has length 266 [2022-07-12 00:00:23,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:23,276 INFO L495 AbstractCegarLoop]: Abstraction has 23418 states and 25271 transitions. [2022-07-12 00:00:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.66666666666667) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:23,276 INFO L276 IsEmpty]: Start isEmpty. Operand 23418 states and 25271 transitions. [2022-07-12 00:00:23,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-12 00:00:23,289 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:23,289 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:23,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-12 00:00:23,290 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -535994125, now seen corresponding path program 1 times [2022-07-12 00:00:23,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:23,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028274272] [2022-07-12 00:00:23,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:23,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 102 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:23,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:23,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028274272] [2022-07-12 00:00:23,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028274272] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:23,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:23,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:23,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229163380] [2022-07-12 00:00:23,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:23,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 00:00:23,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 00:00:23,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 00:00:23,437 INFO L87 Difference]: Start difference. First operand 23418 states and 25271 transitions. Second operand has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:24,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:24,344 INFO L93 Difference]: Finished difference Result 42784 states and 46278 transitions. [2022-07-12 00:00:24,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 00:00:24,345 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 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 266 [2022-07-12 00:00:24,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:24,372 INFO L225 Difference]: With dead ends: 42784 [2022-07-12 00:00:24,372 INFO L226 Difference]: Without dead ends: 24458 [2022-07-12 00:00:24,385 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 [2022-07-12 00:00:24,386 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 351 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1009 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1009 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:24,386 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 92 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1009 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-12 00:00:24,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24458 states. [2022-07-12 00:00:24,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24458 to 24032. [2022-07-12 00:00:24,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24032 states, 24031 states have (on average 1.0786484124672298) internal successors, (25921), 24031 states have internal predecessors, (25921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24032 states to 24032 states and 25921 transitions. [2022-07-12 00:00:24,707 INFO L78 Accepts]: Start accepts. Automaton has 24032 states and 25921 transitions. Word has length 266 [2022-07-12 00:00:24,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:24,707 INFO L495 AbstractCegarLoop]: Abstraction has 24032 states and 25921 transitions. [2022-07-12 00:00:24,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 66.5) internal successors, (266), 3 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 24032 states and 25921 transitions. [2022-07-12 00:00:24,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-07-12 00:00:24,720 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:24,721 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:24,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-12 00:00:24,721 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:24,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:24,722 INFO L85 PathProgramCache]: Analyzing trace with hash 578581440, now seen corresponding path program 1 times [2022-07-12 00:00:24,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:24,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457108494] [2022-07-12 00:00:24,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:24,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:24,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 173 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-12 00:00:24,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457108494] [2022-07-12 00:00:24,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457108494] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:24,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:24,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859084696] [2022-07-12 00:00:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 00:00:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 00:00:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-12 00:00:24,859 INFO L87 Difference]: Start difference. First operand 24032 states and 25921 transitions. Second operand has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:25,887 INFO L93 Difference]: Finished difference Result 42587 states and 46048 transitions. [2022-07-12 00:00:25,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 00:00:25,889 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 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 279 [2022-07-12 00:00:25,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:25,922 INFO L225 Difference]: With dead ends: 42587 [2022-07-12 00:00:25,923 INFO L226 Difference]: Without dead ends: 23850 [2022-07-12 00:00:25,943 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 [2022-07-12 00:00:25,944 INFO L413 NwaCegarLoop]: 80 mSDtfsCounter, 368 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 998 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:25,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 98 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 998 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-12 00:00:25,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23850 states. [2022-07-12 00:00:26,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23850 to 23626. [2022-07-12 00:00:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23626 states, 23625 states have (on average 1.0783915343915345) internal successors, (25477), 23625 states have internal predecessors, (25477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:26,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23626 states to 23626 states and 25477 transitions. [2022-07-12 00:00:26,257 INFO L78 Accepts]: Start accepts. Automaton has 23626 states and 25477 transitions. Word has length 279 [2022-07-12 00:00:26,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:26,258 INFO L495 AbstractCegarLoop]: Abstraction has 23626 states and 25477 transitions. [2022-07-12 00:00:26,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.5) internal successors, (250), 3 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:26,258 INFO L276 IsEmpty]: Start isEmpty. Operand 23626 states and 25477 transitions. [2022-07-12 00:00:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-07-12 00:00:26,273 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:26,273 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:26,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-12 00:00:26,274 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:26,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:26,274 INFO L85 PathProgramCache]: Analyzing trace with hash -218596171, now seen corresponding path program 1 times [2022-07-12 00:00:26,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:26,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194796273] [2022-07-12 00:00:26,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:26,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 110 proven. 6 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-12 00:00:26,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:26,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194796273] [2022-07-12 00:00:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194796273] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:26,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469753632] [2022-07-12 00:00:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:26,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:26,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:26,467 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) [2022-07-12 00:00:26,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-12 00:00:26,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:26,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:26,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 157 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-07-12 00:00:26,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:26,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469753632] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:26,922 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:26,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-12 00:00:26,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143654186] [2022-07-12 00:00:26,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:26,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:26,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:26,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:26,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:26,923 INFO L87 Difference]: Start difference. First operand 23626 states and 25477 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:27,591 INFO L93 Difference]: Finished difference Result 48270 states and 52355 transitions. [2022-07-12 00:00:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 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 286 [2022-07-12 00:00:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:27,640 INFO L225 Difference]: With dead ends: 48270 [2022-07-12 00:00:27,640 INFO L226 Difference]: Without dead ends: 30142 [2022-07-12 00:00:27,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 285 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:27,660 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:27,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 100 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 527 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 00:00:27,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30142 states. [2022-07-12 00:00:28,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30142 to 26267. [2022-07-12 00:00:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 1.0827305261554863) internal successors, (28439), 26266 states have internal predecessors, (28439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:28,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 28439 transitions. [2022-07-12 00:00:28,108 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 28439 transitions. Word has length 286 [2022-07-12 00:00:28,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:28,110 INFO L495 AbstractCegarLoop]: Abstraction has 26267 states and 28439 transitions. [2022-07-12 00:00:28,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:28,110 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 28439 transitions. [2022-07-12 00:00:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-07-12 00:00:28,129 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:28,130 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 00:00:28,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:28,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-12 00:00:28,344 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:28,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:28,344 INFO L85 PathProgramCache]: Analyzing trace with hash 828076308, now seen corresponding path program 1 times [2022-07-12 00:00:28,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:28,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380035417] [2022-07-12 00:00:28,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:28,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:28,511 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 138 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:28,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:28,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380035417] [2022-07-12 00:00:28,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380035417] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:28,512 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:28,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-12 00:00:28,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772790779] [2022-07-12 00:00:28,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:28,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:28,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:28,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:28,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:28,514 INFO L87 Difference]: Start difference. First operand 26267 states and 28439 transitions. Second operand has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:29,300 INFO L93 Difference]: Finished difference Result 55795 states and 60387 transitions. [2022-07-12 00:00:29,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:29,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 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 [2022-07-12 00:00:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:29,350 INFO L225 Difference]: With dead ends: 55795 [2022-07-12 00:00:29,350 INFO L226 Difference]: Without dead ends: 30549 [2022-07-12 00:00:29,372 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 [2022-07-12 00:00:29,373 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 90 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 550 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:29,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 117 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 550 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:29,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30549 states. [2022-07-12 00:00:29,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30549 to 28715. [2022-07-12 00:00:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28715 states, 28714 states have (on average 1.0811450860207563) internal successors, (31044), 28714 states have internal predecessors, (31044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:29,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28715 states to 28715 states and 31044 transitions. [2022-07-12 00:00:29,825 INFO L78 Accepts]: Start accepts. Automaton has 28715 states and 31044 transitions. Word has length 303 [2022-07-12 00:00:29,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:29,825 INFO L495 AbstractCegarLoop]: Abstraction has 28715 states and 31044 transitions. [2022-07-12 00:00:29,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.0) internal successors, (303), 2 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:29,826 INFO L276 IsEmpty]: Start isEmpty. Operand 28715 states and 31044 transitions. [2022-07-12 00:00:29,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-07-12 00:00:29,841 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:29,841 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 00:00:29,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-12 00:00:29,842 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:29,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:29,842 INFO L85 PathProgramCache]: Analyzing trace with hash -143497758, now seen corresponding path program 1 times [2022-07-12 00:00:29,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:29,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992772622] [2022-07-12 00:00:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:29,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:30,010 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:00:30,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:30,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992772622] [2022-07-12 00:00:30,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992772622] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:30,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109223649] [2022-07-12 00:00:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:30,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:30,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:30,014 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) [2022-07-12 00:00:30,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-12 00:00:30,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:30,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:30,351 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-12 00:00:30,351 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:30,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109223649] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:30,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:30,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-12 00:00:30,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239402532] [2022-07-12 00:00:30,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:30,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:30,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:30,356 INFO L87 Difference]: Start difference. First operand 28715 states and 31044 transitions. Second operand has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:30,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:30,809 INFO L93 Difference]: Finished difference Result 60282 states and 65051 transitions. [2022-07-12 00:00:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:30,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 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 305 [2022-07-12 00:00:30,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:30,855 INFO L225 Difference]: With dead ends: 60282 [2022-07-12 00:00:30,855 INFO L226 Difference]: Without dead ends: 39716 [2022-07-12 00:00:30,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:30,872 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 199 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:30,872 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 476 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 00:00:30,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39716 states. [2022-07-12 00:00:31,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39716 to 39511. [2022-07-12 00:00:31,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39511 states, 39510 states have (on average 1.073930650468236) internal successors, (42431), 39510 states have internal predecessors, (42431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:31,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39511 states to 39511 states and 42431 transitions. [2022-07-12 00:00:31,547 INFO L78 Accepts]: Start accepts. Automaton has 39511 states and 42431 transitions. Word has length 305 [2022-07-12 00:00:31,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:31,548 INFO L495 AbstractCegarLoop]: Abstraction has 39511 states and 42431 transitions. [2022-07-12 00:00:31,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.33333333333333) internal successors, (262), 2 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:31,549 INFO L276 IsEmpty]: Start isEmpty. Operand 39511 states and 42431 transitions. [2022-07-12 00:00:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2022-07-12 00:00:31,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:31,568 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, 2, 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] [2022-07-12 00:00:31,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:31,768 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,SelfDestructingSolverStorable17 [2022-07-12 00:00:31,769 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:31,770 INFO L85 PathProgramCache]: Analyzing trace with hash 999634032, now seen corresponding path program 1 times [2022-07-12 00:00:31,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:31,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313145290] [2022-07-12 00:00:31,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:31,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-12 00:00:31,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313145290] [2022-07-12 00:00:31,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313145290] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:31,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991256616] [2022-07-12 00:00:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:31,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:31,915 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) [2022-07-12 00:00:31,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-12 00:00:32,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:32,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 595 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:32,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 137 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-07-12 00:00:32,233 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:32,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991256616] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:32,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:32,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-12 00:00:32,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564976924] [2022-07-12 00:00:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:32,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:32,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:32,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:32,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:32,237 INFO L87 Difference]: Start difference. First operand 39511 states and 42431 transitions. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:33,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:33,079 INFO L93 Difference]: Finished difference Result 88979 states and 95466 transitions. [2022-07-12 00:00:33,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:33,080 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2022-07-12 00:00:33,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:33,148 INFO L225 Difference]: With dead ends: 88979 [2022-07-12 00:00:33,148 INFO L226 Difference]: Without dead ends: 49281 [2022-07-12 00:00:33,170 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 305 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:33,170 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 118 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:33,171 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 114 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 00:00:33,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49281 states. [2022-07-12 00:00:33,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49281 to 45824. [2022-07-12 00:00:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45824 states, 45823 states have (on average 1.0710341968007333) internal successors, (49078), 45823 states have internal predecessors, (49078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45824 states to 45824 states and 49078 transitions. [2022-07-12 00:00:33,810 INFO L78 Accepts]: Start accepts. Automaton has 45824 states and 49078 transitions. Word has length 306 [2022-07-12 00:00:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:33,810 INFO L495 AbstractCegarLoop]: Abstraction has 45824 states and 49078 transitions. [2022-07-12 00:00:33,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 45824 states and 49078 transitions. [2022-07-12 00:00:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-07-12 00:00:33,828 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:33,828 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:33,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:34,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:34,030 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:34,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1730054344, now seen corresponding path program 1 times [2022-07-12 00:00:34,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:34,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617317086] [2022-07-12 00:00:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:34,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:34,217 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-12 00:00:34,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:34,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617317086] [2022-07-12 00:00:34,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617317086] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:34,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417745732] [2022-07-12 00:00:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:34,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:34,221 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) [2022-07-12 00:00:34,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-12 00:00:34,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:34,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:34,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:34,686 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2022-07-12 00:00:34,687 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:34,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417745732] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:34,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:34,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-12 00:00:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197858725] [2022-07-12 00:00:34,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:34,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:34,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:34,689 INFO L87 Difference]: Start difference. First operand 45824 states and 49078 transitions. Second operand has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:35,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:35,499 INFO L93 Difference]: Finished difference Result 89647 states and 96087 transitions. [2022-07-12 00:00:35,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:35,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 311 [2022-07-12 00:00:35,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:35,548 INFO L225 Difference]: With dead ends: 89647 [2022-07-12 00:00:35,548 INFO L226 Difference]: Without dead ends: 44028 [2022-07-12 00:00:35,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 310 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:35,578 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 60 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:35,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 305 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:35,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44028 states. [2022-07-12 00:00:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44028 to 43997. [2022-07-12 00:00:36,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43997 states, 43996 states have (on average 1.0684607691608328) internal successors, (47008), 43996 states have internal predecessors, (47008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:36,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43997 states to 43997 states and 47008 transitions. [2022-07-12 00:00:36,234 INFO L78 Accepts]: Start accepts. Automaton has 43997 states and 47008 transitions. Word has length 311 [2022-07-12 00:00:36,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:36,235 INFO L495 AbstractCegarLoop]: Abstraction has 43997 states and 47008 transitions. [2022-07-12 00:00:36,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.333333333333336) internal successors, (172), 3 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:36,235 INFO L276 IsEmpty]: Start isEmpty. Operand 43997 states and 47008 transitions. [2022-07-12 00:00:36,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2022-07-12 00:00:36,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:36,253 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:36,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-12 00:00:36,453 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 [2022-07-12 00:00:36,454 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:36,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1058437167, now seen corresponding path program 1 times [2022-07-12 00:00:36,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:36,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388940253] [2022-07-12 00:00:36,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:36,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 145 proven. 6 refuted. 0 times theorem prover too weak. 206 trivial. 0 not checked. [2022-07-12 00:00:36,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:36,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388940253] [2022-07-12 00:00:36,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388940253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:36,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773194328] [2022-07-12 00:00:36,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:36,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:36,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:36,564 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) [2022-07-12 00:00:36,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-12 00:00:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:36,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 638 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 00:00:36,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 317 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-12 00:00:36,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:36,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773194328] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:36,921 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:36,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3] total 6 [2022-07-12 00:00:36,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011501855] [2022-07-12 00:00:36,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:36,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-12 00:00:36,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:36,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-12 00:00:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 00:00:36,923 INFO L87 Difference]: Start difference. First operand 43997 states and 47008 transitions. Second operand has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 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) [2022-07-12 00:00:38,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:38,120 INFO L93 Difference]: Finished difference Result 112013 states and 119880 transitions. [2022-07-12 00:00:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-12 00:00:38,121 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 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 318 [2022-07-12 00:00:38,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:38,197 INFO L225 Difference]: With dead ends: 112013 [2022-07-12 00:00:38,198 INFO L226 Difference]: Without dead ends: 70671 [2022-07-12 00:00:38,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 316 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-12 00:00:38,222 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 625 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:38,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [625 Valid, 276 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-12 00:00:38,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70671 states. [2022-07-12 00:00:38,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70671 to 65571. [2022-07-12 00:00:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65571 states, 65570 states have (on average 1.0650144883330792) internal successors, (69833), 65570 states have internal predecessors, (69833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65571 states to 65571 states and 69833 transitions. [2022-07-12 00:00:39,021 INFO L78 Accepts]: Start accepts. Automaton has 65571 states and 69833 transitions. Word has length 318 [2022-07-12 00:00:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:39,021 INFO L495 AbstractCegarLoop]: Abstraction has 65571 states and 69833 transitions. [2022-07-12 00:00:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 70.0) internal successors, (280), 4 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) [2022-07-12 00:00:39,022 INFO L276 IsEmpty]: Start isEmpty. Operand 65571 states and 69833 transitions. [2022-07-12 00:00:39,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-07-12 00:00:39,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:39,037 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:39,057 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:39,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:39,238 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash -770291772, now seen corresponding path program 1 times [2022-07-12 00:00:39,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:39,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131129788] [2022-07-12 00:00:39,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:39,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:39,333 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-12 00:00:39,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:39,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131129788] [2022-07-12 00:00:39,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131129788] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:39,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194238982] [2022-07-12 00:00:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:39,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:39,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:39,336 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) [2022-07-12 00:00:39,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-12 00:00:39,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:39,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:39,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 162 proven. 0 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2022-07-12 00:00:39,889 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:39,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194238982] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:39,889 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:39,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-12 00:00:39,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353534887] [2022-07-12 00:00:39,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:39,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:39,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:39,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:39,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:39,891 INFO L87 Difference]: Start difference. First operand 65571 states and 69833 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:40,740 INFO L93 Difference]: Finished difference Result 124629 states and 132846 transitions. [2022-07-12 00:00:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 329 [2022-07-12 00:00:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:40,822 INFO L225 Difference]: With dead ends: 124629 [2022-07-12 00:00:40,823 INFO L226 Difference]: Without dead ends: 63339 [2022-07-12 00:00:40,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:40,865 INFO L413 NwaCegarLoop]: 263 mSDtfsCounter, 100 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:40,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 272 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-12 00:00:40,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63339 states. [2022-07-12 00:00:41,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63339 to 61298. [2022-07-12 00:00:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61298 states, 61297 states have (on average 1.0617974778537285) internal successors, (65085), 61297 states have internal predecessors, (65085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:41,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61298 states to 61298 states and 65085 transitions. [2022-07-12 00:00:41,782 INFO L78 Accepts]: Start accepts. Automaton has 61298 states and 65085 transitions. Word has length 329 [2022-07-12 00:00:41,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:41,782 INFO L495 AbstractCegarLoop]: Abstraction has 61298 states and 65085 transitions. [2022-07-12 00:00:41,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:41,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61298 states and 65085 transitions. [2022-07-12 00:00:41,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-07-12 00:00:41,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:41,806 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:41,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-12 00:00:42,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:42,008 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1101627577, now seen corresponding path program 1 times [2022-07-12 00:00:42,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:42,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884011072] [2022-07-12 00:00:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:42,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:42,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 322 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-12 00:00:42,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:42,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884011072] [2022-07-12 00:00:42,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884011072] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:42,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-12 00:00:42,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-12 00:00:42,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603488860] [2022-07-12 00:00:42,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:42,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:42,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:42,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:42,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-12 00:00:42,159 INFO L87 Difference]: Start difference. First operand 61298 states and 65085 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:43,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:43,121 INFO L93 Difference]: Finished difference Result 119723 states and 127223 transitions. [2022-07-12 00:00:43,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:43,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 379 [2022-07-12 00:00:43,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:43,197 INFO L225 Difference]: With dead ends: 119723 [2022-07-12 00:00:43,197 INFO L226 Difference]: Without dead ends: 62706 [2022-07-12 00:00:43,236 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 [2022-07-12 00:00:43,237 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 157 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:43,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 326 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-12 00:00:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62706 states. [2022-07-12 00:00:43,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62706 to 55387. [2022-07-12 00:00:43,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55387 states, 55386 states have (on average 1.0593651825371033) internal successors, (58674), 55386 states have internal predecessors, (58674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:44,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55387 states to 55387 states and 58674 transitions. [2022-07-12 00:00:44,045 INFO L78 Accepts]: Start accepts. Automaton has 55387 states and 58674 transitions. Word has length 379 [2022-07-12 00:00:44,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:44,046 INFO L495 AbstractCegarLoop]: Abstraction has 55387 states and 58674 transitions. [2022-07-12 00:00:44,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:44,046 INFO L276 IsEmpty]: Start isEmpty. Operand 55387 states and 58674 transitions. [2022-07-12 00:00:44,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-07-12 00:00:44,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:44,064 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:44,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-12 00:00:44,064 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:44,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:44,065 INFO L85 PathProgramCache]: Analyzing trace with hash -2109960398, now seen corresponding path program 1 times [2022-07-12 00:00:44,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:44,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769024418] [2022-07-12 00:00:44,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:44,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:44,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 111 proven. 6 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-12 00:00:44,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:44,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769024418] [2022-07-12 00:00:44,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769024418] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:44,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607528455] [2022-07-12 00:00:44,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:44,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:44,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:44,209 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:00:44,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-12 00:00:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:44,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 686 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 00:00:44,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:44,608 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 304 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-12 00:00:44,609 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:44,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607528455] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:44,609 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:44,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-12 00:00:44,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748011827] [2022-07-12 00:00:44,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:44,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:44,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:44,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:44,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:44,611 INFO L87 Difference]: Start difference. First operand 55387 states and 58674 transitions. Second operand has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:45,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:45,579 INFO L93 Difference]: Finished difference Result 101605 states and 107611 transitions. [2022-07-12 00:00:45,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:45,580 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 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 395 [2022-07-12 00:00:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:45,640 INFO L225 Difference]: With dead ends: 101605 [2022-07-12 00:00:45,641 INFO L226 Difference]: Without dead ends: 47854 [2022-07-12 00:00:45,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:45,671 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 98 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:45,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 298 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 00:00:45,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47854 states. [2022-07-12 00:00:46,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47854 to 44188. [2022-07-12 00:00:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44188 states, 44187 states have (on average 1.0489736800416412) internal successors, (46351), 44187 states have internal predecessors, (46351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:46,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44188 states to 44188 states and 46351 transitions. [2022-07-12 00:00:46,236 INFO L78 Accepts]: Start accepts. Automaton has 44188 states and 46351 transitions. Word has length 395 [2022-07-12 00:00:46,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:46,237 INFO L495 AbstractCegarLoop]: Abstraction has 44188 states and 46351 transitions. [2022-07-12 00:00:46,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.33333333333333) internal successors, (337), 3 states have internal predecessors, (337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:46,237 INFO L276 IsEmpty]: Start isEmpty. Operand 44188 states and 46351 transitions. [2022-07-12 00:00:46,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2022-07-12 00:00:46,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:46,254 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:00:46,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:46,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:46,455 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:46,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:46,455 INFO L85 PathProgramCache]: Analyzing trace with hash -371545696, now seen corresponding path program 1 times [2022-07-12 00:00:46,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:46,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331343943] [2022-07-12 00:00:46,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:46,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:46,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:46,846 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 248 proven. 6 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-12 00:00:46,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:46,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331343943] [2022-07-12 00:00:46,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331343943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:46,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208722865] [2022-07-12 00:00:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:46,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:46,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:46,849 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:00:46,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-12 00:00:47,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:47,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:47,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 404 backedges. 248 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-12 00:00:47,228 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:47,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208722865] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:47,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:47,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2022-07-12 00:00:47,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832379226] [2022-07-12 00:00:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:47,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:47,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:47,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:47,230 INFO L87 Difference]: Start difference. First operand 44188 states and 46351 transitions. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:47,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:47,666 INFO L93 Difference]: Finished difference Result 120337 states and 126443 transitions. [2022-07-12 00:00:47,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:47,667 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 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 398 [2022-07-12 00:00:47,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:47,753 INFO L225 Difference]: With dead ends: 120337 [2022-07-12 00:00:47,753 INFO L226 Difference]: Without dead ends: 77574 [2022-07-12 00:00:47,796 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 397 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:47,796 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 173 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:47,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 468 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-12 00:00:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77574 states. [2022-07-12 00:00:48,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77574 to 77566. [2022-07-12 00:00:48,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77566 states, 77565 states have (on average 1.0511442016373365) internal successors, (81532), 77565 states have internal predecessors, (81532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:48,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77566 states to 77566 states and 81532 transitions. [2022-07-12 00:00:48,834 INFO L78 Accepts]: Start accepts. Automaton has 77566 states and 81532 transitions. Word has length 398 [2022-07-12 00:00:48,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:48,834 INFO L495 AbstractCegarLoop]: Abstraction has 77566 states and 81532 transitions. [2022-07-12 00:00:48,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 2 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:48,834 INFO L276 IsEmpty]: Start isEmpty. Operand 77566 states and 81532 transitions. [2022-07-12 00:00:48,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 422 [2022-07-12 00:00:48,857 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:48,858 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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, 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] [2022-07-12 00:00:48,878 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:49,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-07-12 00:00:49,068 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:49,068 INFO L85 PathProgramCache]: Analyzing trace with hash -677068812, now seen corresponding path program 1 times [2022-07-12 00:00:49,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:49,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229030280] [2022-07-12 00:00:49,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:49,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:49,550 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 287 proven. 9 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2022-07-12 00:00:49,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:49,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229030280] [2022-07-12 00:00:49,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229030280] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:49,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315823618] [2022-07-12 00:00:49,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:49,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:49,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:49,556 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:00:49,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-12 00:00:49,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:49,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 786 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-12 00:00:49,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:49,793 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 290 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-07-12 00:00:49,793 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:49,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315823618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:49,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:49,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-12 00:00:49,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857996986] [2022-07-12 00:00:49,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:49,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:49,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:49,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:49,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 00:00:49,796 INFO L87 Difference]: Start difference. First operand 77566 states and 81532 transitions. Second operand has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 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) [2022-07-12 00:00:50,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:50,575 INFO L93 Difference]: Finished difference Result 153733 states and 161553 transitions. [2022-07-12 00:00:50,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:50,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 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 421 [2022-07-12 00:00:50,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:50,677 INFO L225 Difference]: With dead ends: 153733 [2022-07-12 00:00:50,677 INFO L226 Difference]: Without dead ends: 77590 [2022-07-12 00:00:50,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-12 00:00:50,730 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 210 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:50,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 328 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-12 00:00:50,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77590 states. [2022-07-12 00:00:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77590 to 74716. [2022-07-12 00:00:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74716 states, 74715 states have (on average 1.046724218697718) internal successors, (78206), 74715 states have internal predecessors, (78206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74716 states to 74716 states and 78206 transitions. [2022-07-12 00:00:51,934 INFO L78 Accepts]: Start accepts. Automaton has 74716 states and 78206 transitions. Word has length 421 [2022-07-12 00:00:51,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:51,935 INFO L495 AbstractCegarLoop]: Abstraction has 74716 states and 78206 transitions. [2022-07-12 00:00:51,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.0) internal successors, (315), 3 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) [2022-07-12 00:00:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 74716 states and 78206 transitions. [2022-07-12 00:00:51,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-12 00:00:51,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:51,958 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 00:00:51,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:52,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-12 00:00:52,159 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:52,159 INFO L85 PathProgramCache]: Analyzing trace with hash 734319830, now seen corresponding path program 1 times [2022-07-12 00:00:52,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:52,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396708862] [2022-07-12 00:00:52,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:52,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 148 proven. 6 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-07-12 00:00:52,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396708862] [2022-07-12 00:00:52,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396708862] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:52,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800451429] [2022-07-12 00:00:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:52,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:52,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:52,589 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:00:52,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-12 00:00:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:52,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 768 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-12 00:00:52,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:52,828 INFO L134 CoverageAnalysis]: Checked inductivity of 518 backedges. 411 proven. 0 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-12 00:00:52,828 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:00:52,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800451429] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:00:52,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:00:52,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-12 00:00:52,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86075186] [2022-07-12 00:00:52,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:00:52,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-12 00:00:52,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:52,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-12 00:00:52,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:52,831 INFO L87 Difference]: Start difference. First operand 74716 states and 78206 transitions. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:53,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:00:53,432 INFO L93 Difference]: Finished difference Result 182426 states and 190905 transitions. [2022-07-12 00:00:53,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-12 00:00:53,433 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 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 436 [2022-07-12 00:00:53,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:00:53,573 INFO L225 Difference]: With dead ends: 182426 [2022-07-12 00:00:53,573 INFO L226 Difference]: Without dead ends: 109133 [2022-07-12 00:00:53,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-12 00:00:53,634 INFO L413 NwaCegarLoop]: 502 mSDtfsCounter, 230 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-12 00:00:53,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 709 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-12 00:00:53,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109133 states. [2022-07-12 00:00:55,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109133 to 104858. [2022-07-12 00:00:55,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104858 states, 104857 states have (on average 1.043430576880895) internal successors, (109411), 104857 states have internal predecessors, (109411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104858 states to 104858 states and 109411 transitions. [2022-07-12 00:00:55,394 INFO L78 Accepts]: Start accepts. Automaton has 104858 states and 109411 transitions. Word has length 436 [2022-07-12 00:00:55,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:00:55,394 INFO L495 AbstractCegarLoop]: Abstraction has 104858 states and 109411 transitions. [2022-07-12 00:00:55,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:00:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 104858 states and 109411 transitions. [2022-07-12 00:00:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 449 [2022-07-12 00:00:55,423 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:00:55,424 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 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] [2022-07-12 00:00:55,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-12 00:00:55,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-12 00:00:55,634 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:00:55,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:00:55,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2142653386, now seen corresponding path program 1 times [2022-07-12 00:00:55,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:00:55,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153171260] [2022-07-12 00:00:55,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:55,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:00:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:55,772 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 185 proven. 6 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-07-12 00:00:55,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:00:55,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153171260] [2022-07-12 00:00:55,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153171260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:00:55,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417042352] [2022-07-12 00:00:55,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:00:55,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:00:55,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:00:55,776 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:00:55,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-12 00:00:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:00:55,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-12 00:00:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:00:56,241 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 283 proven. 189 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-12 00:00:56,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-12 00:00:56,511 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 283 proven. 189 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-12 00:00:56,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417042352] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-12 00:00:56,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-12 00:00:56,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-07-12 00:00:56,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561986951] [2022-07-12 00:00:56,512 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-12 00:00:56,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-12 00:00:56,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:00:56,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-12 00:00:56,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-12 00:00:56,515 INFO L87 Difference]: Start difference. First operand 104858 states and 109411 transitions. Second operand has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:01:00,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:01:00,178 INFO L93 Difference]: Finished difference Result 352358 states and 368141 transitions. [2022-07-12 00:01:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-12 00:01:00,179 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 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 448 [2022-07-12 00:01:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:01:01,008 INFO L225 Difference]: With dead ends: 352358 [2022-07-12 00:01:01,008 INFO L226 Difference]: Without dead ends: 242003 [2022-07-12 00:01:01,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 893 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-12 00:01:01,054 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 2294 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 3432 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2294 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 3779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 3432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-07-12 00:01:01,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2294 Valid, 365 Invalid, 3779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 3432 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-07-12 00:01:01,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242003 states. [2022-07-12 00:01:03,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242003 to 228315. [2022-07-12 00:01:04,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228315 states, 228314 states have (on average 1.0437861891955815) internal successors, (238311), 228314 states have internal predecessors, (238311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:01:04,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228315 states to 228315 states and 238311 transitions. [2022-07-12 00:01:04,855 INFO L78 Accepts]: Start accepts. Automaton has 228315 states and 238311 transitions. Word has length 448 [2022-07-12 00:01:04,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-12 00:01:04,856 INFO L495 AbstractCegarLoop]: Abstraction has 228315 states and 238311 transitions. [2022-07-12 00:01:04,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 61.666666666666664) internal successors, (370), 5 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:01:04,856 INFO L276 IsEmpty]: Start isEmpty. Operand 228315 states and 238311 transitions. [2022-07-12 00:01:04,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2022-07-12 00:01:04,897 INFO L187 NwaCegarLoop]: Found error trace [2022-07-12 00:01:04,898 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-12 00:01:04,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-12 00:01:05,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-12 00:01:05,112 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-12 00:01:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-12 00:01:05,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1872116143, now seen corresponding path program 1 times [2022-07-12 00:01:05,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-12 00:01:05,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542922304] [2022-07-12 00:01:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:01:05,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-12 00:01:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:01:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 498 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-12 00:01:05,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-12 00:01:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542922304] [2022-07-12 00:01:05,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542922304] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-12 00:01:05,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15132465] [2022-07-12 00:01:05,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-12 00:01:05,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-12 00:01:05,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-12 00:01:05,413 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-12 00:01:05,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-12 00:01:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-12 00:01:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 749 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-12 00:01:05,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-12 00:01:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 510 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-12 00:01:06,637 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-12 00:01:06,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15132465] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-12 00:01:06,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-12 00:01:06,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2022-07-12 00:01:06,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181947655] [2022-07-12 00:01:06,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-12 00:01:06,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-12 00:01:06,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-12 00:01:06,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-12 00:01:06,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 00:01:06,641 INFO L87 Difference]: Start difference. First operand 228315 states and 238311 transitions. Second operand has 5 states, 5 states have (on average 93.0) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-12 00:01:09,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-12 00:01:09,823 INFO L93 Difference]: Finished difference Result 542551 states and 566585 transitions. [2022-07-12 00:01:09,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-12 00:01:09,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 93.0) internal successors, (465), 4 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 470 [2022-07-12 00:01:09,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-12 00:01:10,346 INFO L225 Difference]: With dead ends: 542551 [2022-07-12 00:01:10,346 INFO L226 Difference]: Without dead ends: 315050 [2022-07-12 00:01:10,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 467 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-07-12 00:01:10,420 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 657 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 902 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 902 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-12 00:01:10,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 327 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 902 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-12 00:01:10,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315050 states.