./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label27.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label27.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 e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 23:53:47,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 23:53:47,035 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 23:53:47,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 23:53:47,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 23:53:47,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 23:53:47,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 23:53:47,084 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 23:53:47,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 23:53:47,090 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 23:53:47,091 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 23:53:47,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 23:53:47,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 23:53:47,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 23:53:47,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 23:53:47,102 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 23:53:47,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 23:53:47,104 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 23:53:47,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 23:53:47,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 23:53:47,112 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 23:53:47,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 23:53:47,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 23:53:47,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 23:53:47,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 23:53:47,123 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 23:53:47,124 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 23:53:47,124 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 23:53:47,125 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 23:53:47,125 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 23:53:47,126 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 23:53:47,126 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 23:53:47,128 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 23:53:47,129 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 23:53:47,130 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 23:53:47,131 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 23:53:47,131 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 23:53:47,132 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 23:53:47,132 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 23:53:47,132 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 23:53:47,133 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 23:53:47,134 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 23:53:47,139 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 23:53:47,170 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 23:53:47,171 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 23:53:47,171 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 23:53:47,171 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 23:53:47,172 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 23:53:47,172 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 23:53:47,173 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 23:53:47,173 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 23:53:47,173 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 23:53:47,174 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 23:53:47,175 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 23:53:47,175 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 23:53:47,192 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 23:53:47,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 23:53:47,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 23:53:47,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 23:53:47,193 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 23:53:47,193 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 23:53:47,193 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 23:53:47,194 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 23:53:47,194 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 23:53:47,194 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 23:53:47,194 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 23:53:47,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 23:53:47,195 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:53:47,195 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 23:53:47,195 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 23:53:47,196 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 23:53:47,196 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 23:53:47,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 23:53:47,197 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 23:53:47,197 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 23:53:47,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 23:53:47,197 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e8feab662bc73c18f88b757dfbe2687c764aa0043a35ed648ed6332a38c0448d [2022-07-20 23:53:47,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 23:53:47,560 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 23:53:47,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 23:53:47,564 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 23:53:47,564 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 23:53:47,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2022-07-20 23:53:47,631 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb4a7a44/a1574fcbb65f4fdb9c4a7d851bb77a01/FLAG85218ce6d [2022-07-20 23:53:48,391 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 23:53:48,392 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c [2022-07-20 23:53:48,426 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb4a7a44/a1574fcbb65f4fdb9c4a7d851bb77a01/FLAG85218ce6d [2022-07-20 23:53:48,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ddb4a7a44/a1574fcbb65f4fdb9c4a7d851bb77a01 [2022-07-20 23:53:48,474 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 23:53:48,476 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 23:53:48,479 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 23:53:48,479 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 23:53:48,482 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 23:53:48,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:53:48" (1/1) ... [2022-07-20 23:53:48,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@448d16f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:48, skipping insertion in model container [2022-07-20 23:53:48,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:53:48" (1/1) ... [2022-07-20 23:53:48,491 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 23:53:48,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 23:53:48,874 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c[6468,6481] [2022-07-20 23:53:49,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:53:49,674 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 23:53:49,705 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label27.c[6468,6481] [2022-07-20 23:53:50,181 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 23:53:50,203 INFO L208 MainTranslator]: Completed translation [2022-07-20 23:53:50,204 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50 WrapperNode [2022-07-20 23:53:50,204 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 23:53:50,205 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 23:53:50,205 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 23:53:50,205 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 23:53:50,211 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:50,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:50,870 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2022-07-20 23:53:50,870 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 23:53:50,871 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 23:53:50,871 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 23:53:50,871 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 23:53:50,878 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:50,879 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:50,982 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:50,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:51,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:51,260 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:51,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:51,457 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 23:53:51,458 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 23:53:51,458 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 23:53:51,458 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 23:53:51,459 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (1/1) ... [2022-07-20 23:53:51,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 23:53:51,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:53:51,493 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) [2022-07-20 23:53:51,545 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 [2022-07-20 23:53:51,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 23:53:51,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 23:53:51,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 23:53:51,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 23:53:51,665 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 23:53:51,667 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 23:53:56,191 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 23:53:56,212 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 23:53:56,212 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-20 23:53:56,215 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:53:56 BoogieIcfgContainer [2022-07-20 23:53:56,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 23:53:56,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 23:53:56,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 23:53:56,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 23:53:56,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:53:48" (1/3) ... [2022-07-20 23:53:56,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d15b3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:53:56, skipping insertion in model container [2022-07-20 23:53:56,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:53:50" (2/3) ... [2022-07-20 23:53:56,222 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d15b3be and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:53:56, skipping insertion in model container [2022-07-20 23:53:56,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:53:56" (3/3) ... [2022-07-20 23:53:56,224 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label27.c [2022-07-20 23:53:56,236 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 23:53:56,236 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 23:53:56,310 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 23:53:56,317 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@4365ad7b, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@52a2abe [2022-07-20 23:53:56,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 23:53:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:53:56,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-20 23:53:56,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:53:56,344 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] [2022-07-20 23:53:56,345 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:53:56,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:53:56,350 INFO L85 PathProgramCache]: Analyzing trace with hash -2068820151, now seen corresponding path program 1 times [2022-07-20 23:53:56,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:53:56,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667716056] [2022-07-20 23:53:56,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:53:56,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:53:56,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:53:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:53:56,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:53:56,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667716056] [2022-07-20 23:53:56,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667716056] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:53:56,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:53:56,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:53:56,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320385366] [2022-07-20 23:53:56,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:53:56,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:53:56,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:53:56,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:53:56,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:53:56,662 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:01,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:01,094 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2022-07-20 23:54:01,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:01,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 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 45 [2022-07-20 23:54:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:01,118 INFO L225 Difference]: With dead ends: 3160 [2022-07-20 23:54:01,119 INFO L226 Difference]: Without dead ends: 1983 [2022-07-20 23:54:01,126 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 [2022-07-20 23:54:01,129 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 1058 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 4004 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 974 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:01,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1058 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-07-20 23:54:01,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2022-07-20 23:54:01,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2022-07-20 23:54:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1930 states, 1929 states have (on average 1.7973043027475375) internal successors, (3467), 1929 states have internal predecessors, (3467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:01,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2022-07-20 23:54:01,241 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 45 [2022-07-20 23:54:01,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:01,242 INFO L495 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2022-07-20 23:54:01,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 2 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:01,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2022-07-20 23:54:01,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-07-20 23:54:01,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:01,251 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:01,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 23:54:01,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:01,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:01,253 INFO L85 PathProgramCache]: Analyzing trace with hash 331802818, now seen corresponding path program 1 times [2022-07-20 23:54:01,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:01,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459545053] [2022-07-20 23:54:01,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:01,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:01,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:01,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:01,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:01,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459545053] [2022-07-20 23:54:01,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459545053] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:01,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:01,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:54:01,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435969304] [2022-07-20 23:54:01,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:01,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:01,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:01,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:01,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:01,423 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:04,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:04,950 INFO L93 Difference]: Finished difference Result 5456 states and 9917 transitions. [2022-07-20 23:54:04,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:04,950 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 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 110 [2022-07-20 23:54:04,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:04,966 INFO L225 Difference]: With dead ends: 5456 [2022-07-20 23:54:04,966 INFO L226 Difference]: Without dead ends: 3528 [2022-07-20 23:54:04,970 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 [2022-07-20 23:54:04,971 INFO L413 NwaCegarLoop]: 855 mSDtfsCounter, 923 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 923 SdHoareTripleChecker+Valid, 1007 SdHoareTripleChecker+Invalid, 3187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:04,971 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [923 Valid, 1007 Invalid, 3187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-07-20 23:54:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3528 states. [2022-07-20 23:54:05,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3528 to 3526. [2022-07-20 23:54:05,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3526 states, 3525 states have (on average 1.5670921985815602) internal successors, (5524), 3525 states have internal predecessors, (5524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3526 states to 3526 states and 5524 transitions. [2022-07-20 23:54:05,034 INFO L78 Accepts]: Start accepts. Automaton has 3526 states and 5524 transitions. Word has length 110 [2022-07-20 23:54:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:05,035 INFO L495 AbstractCegarLoop]: Abstraction has 3526 states and 5524 transitions. [2022-07-20 23:54:05,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 2 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 3526 states and 5524 transitions. [2022-07-20 23:54:05,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-07-20 23:54:05,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:05,037 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:05,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 23:54:05,038 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:05,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:05,038 INFO L85 PathProgramCache]: Analyzing trace with hash -748334831, now seen corresponding path program 1 times [2022-07-20 23:54:05,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:05,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620433782] [2022-07-20 23:54:05,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:05,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:05,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:05,110 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:05,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:05,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620433782] [2022-07-20 23:54:05,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620433782] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:05,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:05,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:54:05,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143023136] [2022-07-20 23:54:05,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:05,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:05,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:05,113 INFO L87 Difference]: Start difference. First operand 3526 states and 5524 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:08,471 INFO L93 Difference]: Finished difference Result 10232 states and 16097 transitions. [2022-07-20 23:54:08,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:08,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 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 116 [2022-07-20 23:54:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:08,496 INFO L225 Difference]: With dead ends: 10232 [2022-07-20 23:54:08,497 INFO L226 Difference]: Without dead ends: 6708 [2022-07-20 23:54:08,502 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 [2022-07-20 23:54:08,503 INFO L413 NwaCegarLoop]: 717 mSDtfsCounter, 972 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 775 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 972 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 3309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 775 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:08,504 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [972 Valid, 850 Invalid, 3309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [775 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-07-20 23:54:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6708 states. [2022-07-20 23:54:08,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6708 to 6700. [2022-07-20 23:54:08,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.413046723391551) internal successors, (9466), 6699 states have internal predecessors, (9466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:08,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 9466 transitions. [2022-07-20 23:54:08,613 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 9466 transitions. Word has length 116 [2022-07-20 23:54:08,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:08,613 INFO L495 AbstractCegarLoop]: Abstraction has 6700 states and 9466 transitions. [2022-07-20 23:54:08,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:08,614 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 9466 transitions. [2022-07-20 23:54:08,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-07-20 23:54:08,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:08,615 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:08,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-20 23:54:08,616 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:08,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1036466844, now seen corresponding path program 1 times [2022-07-20 23:54:08,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:08,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754183913] [2022-07-20 23:54:08,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:08,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:08,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754183913] [2022-07-20 23:54:08,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754183913] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:08,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:08,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:54:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745177938] [2022-07-20 23:54:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:08,714 INFO L87 Difference]: Start difference. First operand 6700 states and 9466 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:12,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:12,140 INFO L93 Difference]: Finished difference Result 17443 states and 24479 transitions. [2022-07-20 23:54:12,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:12,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 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 146 [2022-07-20 23:54:12,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:12,175 INFO L225 Difference]: With dead ends: 17443 [2022-07-20 23:54:12,175 INFO L226 Difference]: Without dead ends: 10745 [2022-07-20 23:54:12,189 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 [2022-07-20 23:54:12,190 INFO L413 NwaCegarLoop]: 834 mSDtfsCounter, 844 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3291 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 3741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 3291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:12,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [844 Valid, 965 Invalid, 3741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 3291 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 23:54:12,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10745 states. [2022-07-20 23:54:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10745 to 10669. [2022-07-20 23:54:12,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3562992125984252) internal successors, (14469), 10668 states have internal predecessors, (14469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:12,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14469 transitions. [2022-07-20 23:54:12,492 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14469 transitions. Word has length 146 [2022-07-20 23:54:12,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:12,493 INFO L495 AbstractCegarLoop]: Abstraction has 10669 states and 14469 transitions. [2022-07-20 23:54:12,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 2 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:12,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14469 transitions. [2022-07-20 23:54:12,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-07-20 23:54:12,497 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:12,498 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:12,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-20 23:54:12,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:12,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:12,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1555116277, now seen corresponding path program 1 times [2022-07-20 23:54:12,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:12,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510417780] [2022-07-20 23:54:12,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:12,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:12,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:12,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:12,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510417780] [2022-07-20 23:54:12,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510417780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:12,665 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:12,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:54:12,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906330643] [2022-07-20 23:54:12,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:12,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:12,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:12,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:12,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:12,670 INFO L87 Difference]: Start difference. First operand 10669 states and 14469 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:15,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:15,343 INFO L93 Difference]: Finished difference Result 20549 states and 28119 transitions. [2022-07-20 23:54:15,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:15,350 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 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 156 [2022-07-20 23:54:15,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:15,376 INFO L225 Difference]: With dead ends: 20549 [2022-07-20 23:54:15,377 INFO L226 Difference]: Without dead ends: 10669 [2022-07-20 23:54:15,386 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 [2022-07-20 23:54:15,387 INFO L413 NwaCegarLoop]: 1083 mSDtfsCounter, 678 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 2544 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 2520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:15,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1212 Invalid, 2544 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 2520 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:54:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10669 states. [2022-07-20 23:54:15,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10669 to 10669. [2022-07-20 23:54:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10669 states, 10668 states have (on average 1.3539557555305586) internal successors, (14444), 10668 states have internal predecessors, (14444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:15,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10669 states to 10669 states and 14444 transitions. [2022-07-20 23:54:15,609 INFO L78 Accepts]: Start accepts. Automaton has 10669 states and 14444 transitions. Word has length 156 [2022-07-20 23:54:15,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:15,610 INFO L495 AbstractCegarLoop]: Abstraction has 10669 states and 14444 transitions. [2022-07-20 23:54:15,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 2 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:15,614 INFO L276 IsEmpty]: Start isEmpty. Operand 10669 states and 14444 transitions. [2022-07-20 23:54:15,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-07-20 23:54:15,615 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:15,616 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:15,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-20 23:54:15,617 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:15,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:15,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1267295969, now seen corresponding path program 1 times [2022-07-20 23:54:15,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:15,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891723618] [2022-07-20 23:54:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:15,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:15,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:15,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891723618] [2022-07-20 23:54:15,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891723618] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:15,738 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:15,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:15,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763864098] [2022-07-20 23:54:15,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:15,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:15,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:15,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:15,741 INFO L87 Difference]: Start difference. First operand 10669 states and 14444 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:18,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:18,881 INFO L93 Difference]: Finished difference Result 29991 states and 41155 transitions. [2022-07-20 23:54:18,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:18,882 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 170 [2022-07-20 23:54:18,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:18,922 INFO L225 Difference]: With dead ends: 29991 [2022-07-20 23:54:18,923 INFO L226 Difference]: Without dead ends: 20111 [2022-07-20 23:54:18,938 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 [2022-07-20 23:54:18,939 INFO L413 NwaCegarLoop]: 1849 mSDtfsCounter, 892 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 806 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 892 SdHoareTripleChecker+Valid, 1988 SdHoareTripleChecker+Invalid, 3285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 806 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:18,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [892 Valid, 1988 Invalid, 3285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [806 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:54:18,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20111 states. [2022-07-20 23:54:19,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20111 to 19314. [2022-07-20 23:54:19,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19314 states, 19313 states have (on average 1.2808470978097655) internal successors, (24737), 19313 states have internal predecessors, (24737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:19,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19314 states to 19314 states and 24737 transitions. [2022-07-20 23:54:19,210 INFO L78 Accepts]: Start accepts. Automaton has 19314 states and 24737 transitions. Word has length 170 [2022-07-20 23:54:19,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:19,211 INFO L495 AbstractCegarLoop]: Abstraction has 19314 states and 24737 transitions. [2022-07-20 23:54:19,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:19,212 INFO L276 IsEmpty]: Start isEmpty. Operand 19314 states and 24737 transitions. [2022-07-20 23:54:19,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-07-20 23:54:19,216 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:19,216 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:54:19,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-20 23:54:19,216 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:19,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:19,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1650019074, now seen corresponding path program 1 times [2022-07-20 23:54:19,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:19,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894862248] [2022-07-20 23:54:19,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:19,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:19,492 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-07-20 23:54:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:19,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894862248] [2022-07-20 23:54:19,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894862248] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:19,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:19,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:54:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681409407] [2022-07-20 23:54:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:19,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:19,495 INFO L87 Difference]: Start difference. First operand 19314 states and 24737 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:22,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:22,732 INFO L93 Difference]: Finished difference Result 44942 states and 56955 transitions. [2022-07-20 23:54:22,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:22,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 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 257 [2022-07-20 23:54:22,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:22,787 INFO L225 Difference]: With dead ends: 44942 [2022-07-20 23:54:22,787 INFO L226 Difference]: Without dead ends: 25630 [2022-07-20 23:54:22,808 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 [2022-07-20 23:54:22,809 INFO L413 NwaCegarLoop]: 1012 mSDtfsCounter, 726 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 2700 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 726 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 2881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:22,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [726 Valid, 1191 Invalid, 2881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2700 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:54:22,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25630 states. [2022-07-20 23:54:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25630 to 25622. [2022-07-20 23:54:23,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25622 states, 25621 states have (on average 1.2324655555989228) internal successors, (31577), 25621 states have internal predecessors, (31577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:23,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25622 states to 25622 states and 31577 transitions. [2022-07-20 23:54:23,137 INFO L78 Accepts]: Start accepts. Automaton has 25622 states and 31577 transitions. Word has length 257 [2022-07-20 23:54:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:23,138 INFO L495 AbstractCegarLoop]: Abstraction has 25622 states and 31577 transitions. [2022-07-20 23:54:23,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:23,138 INFO L276 IsEmpty]: Start isEmpty. Operand 25622 states and 31577 transitions. [2022-07-20 23:54:23,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-07-20 23:54:23,141 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:23,142 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:54:23,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-20 23:54:23,145 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:23,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:23,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1608424042, now seen corresponding path program 1 times [2022-07-20 23:54:23,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:23,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925192761] [2022-07-20 23:54:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:23,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:23,274 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 23:54:23,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:23,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925192761] [2022-07-20 23:54:23,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925192761] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:23,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:23,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:23,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973596089] [2022-07-20 23:54:23,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:23,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:23,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:23,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:23,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:23,277 INFO L87 Difference]: Start difference. First operand 25622 states and 31577 transitions. Second operand has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:26,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:26,519 INFO L93 Difference]: Finished difference Result 72509 states and 89961 transitions. [2022-07-20 23:54:26,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:26,520 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 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 272 [2022-07-20 23:54:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:26,589 INFO L225 Difference]: With dead ends: 72509 [2022-07-20 23:54:26,590 INFO L226 Difference]: Without dead ends: 47676 [2022-07-20 23:54:26,623 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 [2022-07-20 23:54:26,624 INFO L413 NwaCegarLoop]: 782 mSDtfsCounter, 825 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 916 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 3294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 916 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:26,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [825 Valid, 900 Invalid, 3294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [916 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-07-20 23:54:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47676 states. [2022-07-20 23:54:27,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47676 to 46091. [2022-07-20 23:54:27,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46091 states, 46090 states have (on average 1.1848557170752876) internal successors, (54610), 46090 states have internal predecessors, (54610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46091 states to 46091 states and 54610 transitions. [2022-07-20 23:54:27,367 INFO L78 Accepts]: Start accepts. Automaton has 46091 states and 54610 transitions. Word has length 272 [2022-07-20 23:54:27,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:27,367 INFO L495 AbstractCegarLoop]: Abstraction has 46091 states and 54610 transitions. [2022-07-20 23:54:27,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 90.66666666666667) internal successors, (272), 3 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:27,368 INFO L276 IsEmpty]: Start isEmpty. Operand 46091 states and 54610 transitions. [2022-07-20 23:54:27,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-07-20 23:54:27,375 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:27,375 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:27,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-20 23:54:27,376 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:27,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1505061361, now seen corresponding path program 1 times [2022-07-20 23:54:27,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:27,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80800060] [2022-07-20 23:54:27,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:27,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:27,725 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 214 proven. 113 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-07-20 23:54:27,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:27,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80800060] [2022-07-20 23:54:27,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80800060] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:54:27,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728387523] [2022-07-20 23:54:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:27,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:54:27,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:54:27,728 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) [2022-07-20 23:54:27,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 23:54:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-20 23:54:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:54:28,079 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 257 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-20 23:54:28,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:54:28,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728387523] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:28,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:54:28,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2022-07-20 23:54:28,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58020160] [2022-07-20 23:54:28,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:28,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:28,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:28,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:54:28,096 INFO L87 Difference]: Start difference. First operand 46091 states and 54610 transitions. Second operand has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:31,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:31,191 INFO L93 Difference]: Finished difference Result 91382 states and 108416 transitions. [2022-07-20 23:54:31,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:31,192 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 351 [2022-07-20 23:54:31,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:31,256 INFO L225 Difference]: With dead ends: 91382 [2022-07-20 23:54:31,257 INFO L226 Difference]: Without dead ends: 46080 [2022-07-20 23:54:31,290 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:54:31,291 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1077 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2394 mSolverCounterSat, 527 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1077 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 527 IncrementalHoareTripleChecker+Valid, 2394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:31,292 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1077 Valid, 822 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [527 Valid, 2394 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:54:31,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46080 states. [2022-07-20 23:54:32,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46080 to 46077. [2022-07-20 23:54:32,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46077 states, 46076 states have (on average 1.1360578175188818) internal successors, (52345), 46076 states have internal predecessors, (52345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46077 states to 46077 states and 52345 transitions. [2022-07-20 23:54:32,173 INFO L78 Accepts]: Start accepts. Automaton has 46077 states and 52345 transitions. Word has length 351 [2022-07-20 23:54:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 46077 states and 52345 transitions. [2022-07-20 23:54:32,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.66666666666667) internal successors, (239), 3 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:32,174 INFO L276 IsEmpty]: Start isEmpty. Operand 46077 states and 52345 transitions. [2022-07-20 23:54:32,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2022-07-20 23:54:32,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:32,183 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2022-07-20 23:54:32,210 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-20 23:54:32,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:54:32,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:32,400 INFO L85 PathProgramCache]: Analyzing trace with hash -625904064, now seen corresponding path program 1 times [2022-07-20 23:54:32,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:32,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410519687] [2022-07-20 23:54:32,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:32,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:32,610 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-20 23:54:32,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:32,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410519687] [2022-07-20 23:54:32,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410519687] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:32,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:32,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:32,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572688867] [2022-07-20 23:54:32,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:32,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:32,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:32,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:32,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:32,613 INFO L87 Difference]: Start difference. First operand 46077 states and 52345 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:36,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:36,055 INFO L93 Difference]: Finished difference Result 101586 states and 116820 transitions. [2022-07-20 23:54:36,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:36,056 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 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 360 [2022-07-20 23:54:36,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:36,129 INFO L225 Difference]: With dead ends: 101586 [2022-07-20 23:54:36,130 INFO L226 Difference]: Without dead ends: 56298 [2022-07-20 23:54:36,152 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 [2022-07-20 23:54:36,152 INFO L413 NwaCegarLoop]: 1440 mSDtfsCounter, 1110 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1110 SdHoareTripleChecker+Valid, 1525 SdHoareTripleChecker+Invalid, 3160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 767 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:36,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1110 Valid, 1525 Invalid, 3160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [767 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-07-20 23:54:36,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56298 states. [2022-07-20 23:54:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56298 to 56297. [2022-07-20 23:54:36,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56297 states, 56296 states have (on average 1.1241651271848798) internal successors, (63286), 56296 states have internal predecessors, (63286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56297 states to 56297 states and 63286 transitions. [2022-07-20 23:54:36,972 INFO L78 Accepts]: Start accepts. Automaton has 56297 states and 63286 transitions. Word has length 360 [2022-07-20 23:54:36,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:36,974 INFO L495 AbstractCegarLoop]: Abstraction has 56297 states and 63286 transitions. [2022-07-20 23:54:36,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:36,974 INFO L276 IsEmpty]: Start isEmpty. Operand 56297 states and 63286 transitions. [2022-07-20 23:54:36,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2022-07-20 23:54:36,982 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:36,982 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:36,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-20 23:54:36,983 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:36,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:36,984 INFO L85 PathProgramCache]: Analyzing trace with hash 271548370, now seen corresponding path program 1 times [2022-07-20 23:54:36,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:36,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672655709] [2022-07-20 23:54:36,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:36,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:37,119 INFO L134 CoverageAnalysis]: Checked inductivity of 627 backedges. 476 proven. 0 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 23:54:37,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672655709] [2022-07-20 23:54:37,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672655709] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:37,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:37,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:37,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155165694] [2022-07-20 23:54:37,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:37,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 23:54:37,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:37,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 23:54:37,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 23:54:37,123 INFO L87 Difference]: Start difference. First operand 56297 states and 63286 transitions. Second operand has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:43,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:43,522 INFO L93 Difference]: Finished difference Result 141882 states and 159543 transitions. [2022-07-20 23:54:43,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 23:54:43,522 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 393 [2022-07-20 23:54:43,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:43,657 INFO L225 Difference]: With dead ends: 141882 [2022-07-20 23:54:43,657 INFO L226 Difference]: Without dead ends: 86374 [2022-07-20 23:54:43,692 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 [2022-07-20 23:54:43,693 INFO L413 NwaCegarLoop]: 680 mSDtfsCounter, 1688 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 5942 mSolverCounterSat, 986 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1688 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 6928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 5942 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:43,693 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1688 Valid, 864 Invalid, 6928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 5942 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-07-20 23:54:43,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86374 states. [2022-07-20 23:54:44,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86374 to 68114. [2022-07-20 23:54:44,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68114 states, 68113 states have (on average 1.1126069913232424) internal successors, (75783), 68113 states have internal predecessors, (75783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:44,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68114 states to 68114 states and 75783 transitions. [2022-07-20 23:54:44,553 INFO L78 Accepts]: Start accepts. Automaton has 68114 states and 75783 transitions. Word has length 393 [2022-07-20 23:54:44,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:44,554 INFO L495 AbstractCegarLoop]: Abstraction has 68114 states and 75783 transitions. [2022-07-20 23:54:44,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 71.75) internal successors, (287), 3 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:44,554 INFO L276 IsEmpty]: Start isEmpty. Operand 68114 states and 75783 transitions. [2022-07-20 23:54:44,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 407 [2022-07-20 23:54:44,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:44,562 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2022-07-20 23:54:44,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-20 23:54:44,562 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:44,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:44,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1710275287, now seen corresponding path program 1 times [2022-07-20 23:54:44,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:44,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343837344] [2022-07-20 23:54:44,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 312 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-07-20 23:54:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343837344] [2022-07-20 23:54:44,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343837344] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:44,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:44,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:44,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471267337] [2022-07-20 23:54:44,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:44,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:44,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:44,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:44,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:44,867 INFO L87 Difference]: Start difference. First operand 68114 states and 75783 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:48,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:48,416 INFO L93 Difference]: Finished difference Result 159833 states and 178094 transitions. [2022-07-20 23:54:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 406 [2022-07-20 23:54:48,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:48,534 INFO L225 Difference]: With dead ends: 159833 [2022-07-20 23:54:48,534 INFO L226 Difference]: Without dead ends: 92508 [2022-07-20 23:54:48,567 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 [2022-07-20 23:54:48,568 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 831 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 831 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:48,568 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [831 Valid, 783 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-07-20 23:54:48,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92508 states. [2022-07-20 23:54:49,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92508 to 90920. [2022-07-20 23:54:49,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90920 states, 90919 states have (on average 1.0987142401478238) internal successors, (99894), 90919 states have internal predecessors, (99894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:49,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90920 states to 90920 states and 99894 transitions. [2022-07-20 23:54:49,610 INFO L78 Accepts]: Start accepts. Automaton has 90920 states and 99894 transitions. Word has length 406 [2022-07-20 23:54:49,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:49,611 INFO L495 AbstractCegarLoop]: Abstraction has 90920 states and 99894 transitions. [2022-07-20 23:54:49,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 90920 states and 99894 transitions. [2022-07-20 23:54:49,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2022-07-20 23:54:49,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:49,621 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-07-20 23:54:49,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-20 23:54:49,622 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:49,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:49,622 INFO L85 PathProgramCache]: Analyzing trace with hash -408391344, now seen corresponding path program 1 times [2022-07-20 23:54:49,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:49,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442328599] [2022-07-20 23:54:49,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:49,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:49,994 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 365 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:54:49,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:49,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442328599] [2022-07-20 23:54:49,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442328599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:49,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:54:49,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:54:49,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036582175] [2022-07-20 23:54:49,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:49,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:49,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:49,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:49,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:54:49,997 INFO L87 Difference]: Start difference. First operand 90920 states and 99894 transitions. Second operand has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:53,386 INFO L93 Difference]: Finished difference Result 204687 states and 224264 transitions. [2022-07-20 23:54:53,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:53,386 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 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 426 [2022-07-20 23:54:53,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:53,524 INFO L225 Difference]: With dead ends: 204687 [2022-07-20 23:54:53,524 INFO L226 Difference]: Without dead ends: 114556 [2022-07-20 23:54:53,552 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 [2022-07-20 23:54:53,552 INFO L413 NwaCegarLoop]: 976 mSDtfsCounter, 796 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2467 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 796 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 2836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 2467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:53,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [796 Valid, 1116 Invalid, 2836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 2467 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:54:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114556 states. [2022-07-20 23:54:54,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114556 to 110599. [2022-07-20 23:54:54,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110599 states, 110598 states have (on average 1.088509737969945) internal successors, (120387), 110598 states have internal predecessors, (120387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110599 states to 110599 states and 120387 transitions. [2022-07-20 23:54:54,759 INFO L78 Accepts]: Start accepts. Automaton has 110599 states and 120387 transitions. Word has length 426 [2022-07-20 23:54:54,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:54:54,760 INFO L495 AbstractCegarLoop]: Abstraction has 110599 states and 120387 transitions. [2022-07-20 23:54:54,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 81.33333333333333) internal successors, (244), 3 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 110599 states and 120387 transitions. [2022-07-20 23:54:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2022-07-20 23:54:54,767 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:54:54,768 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:54:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-20 23:54:54,768 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:54:54,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:54:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1634378536, now seen corresponding path program 1 times [2022-07-20 23:54:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:54:54,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759395670] [2022-07-20 23:54:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:54:55,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:55,359 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 383 proven. 113 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2022-07-20 23:54:55,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:54:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759395670] [2022-07-20 23:54:55,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759395670] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 23:54:55,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49686463] [2022-07-20 23:54:55,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:54:55,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 23:54:55,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 23:54:55,362 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) [2022-07-20 23:54:55,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 23:54:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:54:55,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-20 23:54:55,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 23:54:56,154 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-07-20 23:54:56,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-20 23:54:56,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49686463] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:54:56,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-20 23:54:56,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-07-20 23:54:56,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628521512] [2022-07-20 23:54:56,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:54:56,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:54:56,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:54:56,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:54:56,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:54:56,157 INFO L87 Difference]: Start difference. First operand 110599 states and 120387 transitions. Second operand has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:54:59,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:54:59,227 INFO L93 Difference]: Finished difference Result 210184 states and 229315 transitions. [2022-07-20 23:54:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:54:59,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2022-07-20 23:54:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:54:59,554 INFO L225 Difference]: With dead ends: 210184 [2022-07-20 23:54:59,554 INFO L226 Difference]: Without dead ends: 113757 [2022-07-20 23:54:59,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-07-20 23:54:59,608 INFO L413 NwaCegarLoop]: 1017 mSDtfsCounter, 682 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2450 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 682 SdHoareTripleChecker+Valid, 1150 SdHoareTripleChecker+Invalid, 2559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:54:59,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [682 Valid, 1150 Invalid, 2559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2450 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-20 23:54:59,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113757 states. [2022-07-20 23:55:00,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113757 to 113747. [2022-07-20 23:55:00,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113747 states, 113746 states have (on average 1.0789302480966363) internal successors, (122724), 113746 states have internal predecessors, (122724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:01,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113747 states to 113747 states and 122724 transitions. [2022-07-20 23:55:01,049 INFO L78 Accepts]: Start accepts. Automaton has 113747 states and 122724 transitions. Word has length 436 [2022-07-20 23:55:01,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:01,049 INFO L495 AbstractCegarLoop]: Abstraction has 113747 states and 122724 transitions. [2022-07-20 23:55:01,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.66666666666667) internal successors, (218), 2 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:01,049 INFO L276 IsEmpty]: Start isEmpty. Operand 113747 states and 122724 transitions. [2022-07-20 23:55:01,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2022-07-20 23:55:01,057 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:01,057 INFO L195 NwaCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:01,074 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-20 23:55:01,258 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,SelfDestructingSolverStorable13 [2022-07-20 23:55:01,258 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:01,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1472115083, now seen corresponding path program 1 times [2022-07-20 23:55:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258257118] [2022-07-20 23:55:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:01,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:01,447 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 757 proven. 0 refuted. 0 times theorem prover too weak. 239 trivial. 0 not checked. [2022-07-20 23:55:01,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:01,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258257118] [2022-07-20 23:55:01,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258257118] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:01,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:01,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:01,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844760073] [2022-07-20 23:55:01,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:01,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:01,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:01,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:01,450 INFO L87 Difference]: Start difference. First operand 113747 states and 122724 transitions. Second operand has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:04,890 INFO L93 Difference]: Finished difference Result 228280 states and 246243 transitions. [2022-07-20 23:55:04,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:04,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 482 [2022-07-20 23:55:04,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:05,023 INFO L225 Difference]: With dead ends: 228280 [2022-07-20 23:55:05,023 INFO L226 Difference]: Without dead ends: 115322 [2022-07-20 23:55:05,075 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 [2022-07-20 23:55:05,075 INFO L413 NwaCegarLoop]: 1337 mSDtfsCounter, 933 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2381 mSolverCounterSat, 579 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 933 SdHoareTripleChecker+Valid, 1417 SdHoareTripleChecker+Invalid, 2960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 579 IncrementalHoareTripleChecker+Valid, 2381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:05,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [933 Valid, 1417 Invalid, 2960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [579 Valid, 2381 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-20 23:55:05,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115322 states. [2022-07-20 23:55:06,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115322 to 113736. [2022-07-20 23:55:06,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113736 states, 113735 states have (on average 1.0587945663164373) internal successors, (120422), 113735 states have internal predecessors, (120422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:06,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113736 states to 113736 states and 120422 transitions. [2022-07-20 23:55:06,461 INFO L78 Accepts]: Start accepts. Automaton has 113736 states and 120422 transitions. Word has length 482 [2022-07-20 23:55:06,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:06,461 INFO L495 AbstractCegarLoop]: Abstraction has 113736 states and 120422 transitions. [2022-07-20 23:55:06,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.33333333333333) internal successors, (289), 3 states have internal predecessors, (289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:06,461 INFO L276 IsEmpty]: Start isEmpty. Operand 113736 states and 120422 transitions. [2022-07-20 23:55:06,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2022-07-20 23:55:06,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:06,467 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-20 23:55:06,467 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:06,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash -2006081157, now seen corresponding path program 1 times [2022-07-20 23:55:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:06,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578018724] [2022-07-20 23:55:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:06,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:06,641 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 481 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-07-20 23:55:06,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:06,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578018724] [2022-07-20 23:55:06,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578018724] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:06,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:06,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:06,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646877066] [2022-07-20 23:55:06,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:06,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:06,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:06,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:06,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:06,644 INFO L87 Difference]: Start difference. First operand 113736 states and 120422 transitions. Second operand has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:10,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:10,167 INFO L93 Difference]: Finished difference Result 250294 states and 265588 transitions. [2022-07-20 23:55:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 487 [2022-07-20 23:55:10,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:10,631 INFO L225 Difference]: With dead ends: 250294 [2022-07-20 23:55:10,632 INFO L226 Difference]: Without dead ends: 135773 [2022-07-20 23:55:10,656 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 [2022-07-20 23:55:10,663 INFO L413 NwaCegarLoop]: 1664 mSDtfsCounter, 729 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2432 mSolverCounterSat, 421 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 729 SdHoareTripleChecker+Valid, 1797 SdHoareTripleChecker+Invalid, 2853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 421 IncrementalHoareTripleChecker+Valid, 2432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:10,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [729 Valid, 1797 Invalid, 2853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [421 Valid, 2432 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-07-20 23:55:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135773 states. [2022-07-20 23:55:11,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135773 to 135759. [2022-07-20 23:55:11,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135759 states, 135758 states have (on average 1.0514813123351847) internal successors, (142747), 135758 states have internal predecessors, (142747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:11,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135759 states to 135759 states and 142747 transitions. [2022-07-20 23:55:11,999 INFO L78 Accepts]: Start accepts. Automaton has 135759 states and 142747 transitions. Word has length 487 [2022-07-20 23:55:11,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:11,999 INFO L495 AbstractCegarLoop]: Abstraction has 135759 states and 142747 transitions. [2022-07-20 23:55:11,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.66666666666667) internal successors, (305), 3 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:11,999 INFO L276 IsEmpty]: Start isEmpty. Operand 135759 states and 142747 transitions. [2022-07-20 23:55:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2022-07-20 23:55:12,005 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:12,005 INFO L195 NwaCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:12,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-20 23:55:12,006 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:12,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:12,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1878748943, now seen corresponding path program 1 times [2022-07-20 23:55:12,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:12,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193136012] [2022-07-20 23:55:12,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:12,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:12,163 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 695 proven. 0 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-07-20 23:55:12,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:12,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193136012] [2022-07-20 23:55:12,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193136012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:12,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:12,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:12,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681049751] [2022-07-20 23:55:12,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:12,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:12,166 INFO L87 Difference]: Start difference. First operand 135759 states and 142747 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:16,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:16,569 INFO L93 Difference]: Finished difference Result 302245 states and 319097 transitions. [2022-07-20 23:55:16,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:16,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 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 496 [2022-07-20 23:55:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:16,820 INFO L225 Difference]: With dead ends: 302245 [2022-07-20 23:55:16,820 INFO L226 Difference]: Without dead ends: 185383 [2022-07-20 23:55:16,894 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 [2022-07-20 23:55:16,895 INFO L413 NwaCegarLoop]: 541 mSDtfsCounter, 983 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 849 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 3226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 849 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:16,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [983 Valid, 619 Invalid, 3226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [849 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-07-20 23:55:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185383 states. [2022-07-20 23:55:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185383 to 185376. [2022-07-20 23:55:18,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185376 states, 185375 states have (on average 1.0500391099123398) internal successors, (194651), 185375 states have internal predecessors, (194651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:19,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185376 states to 185376 states and 194651 transitions. [2022-07-20 23:55:19,199 INFO L78 Accepts]: Start accepts. Automaton has 185376 states and 194651 transitions. Word has length 496 [2022-07-20 23:55:19,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:19,199 INFO L495 AbstractCegarLoop]: Abstraction has 185376 states and 194651 transitions. [2022-07-20 23:55:19,200 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:19,200 INFO L276 IsEmpty]: Start isEmpty. Operand 185376 states and 194651 transitions. [2022-07-20 23:55:19,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-07-20 23:55:19,206 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:19,207 INFO L195 NwaCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:19,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-20 23:55:19,207 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:19,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:19,207 INFO L85 PathProgramCache]: Analyzing trace with hash 835385596, now seen corresponding path program 1 times [2022-07-20 23:55:19,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:19,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460081866] [2022-07-20 23:55:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:19,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:19,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:19,370 INFO L134 CoverageAnalysis]: Checked inductivity of 996 backedges. 430 proven. 0 refuted. 0 times theorem prover too weak. 566 trivial. 0 not checked. [2022-07-20 23:55:19,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:19,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460081866] [2022-07-20 23:55:19,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460081866] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:19,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:19,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 23:55:19,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713506721] [2022-07-20 23:55:19,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:19,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:19,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:19,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:19,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:19,373 INFO L87 Difference]: Start difference. First operand 185376 states and 194651 transitions. Second operand has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:21,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:21,970 INFO L93 Difference]: Finished difference Result 350265 states and 368268 transitions. [2022-07-20 23:55:21,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:21,970 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 523 [2022-07-20 23:55:21,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:22,612 INFO L225 Difference]: With dead ends: 350265 [2022-07-20 23:55:22,612 INFO L226 Difference]: Without dead ends: 183786 [2022-07-20 23:55:22,737 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 [2022-07-20 23:55:22,739 INFO L413 NwaCegarLoop]: 270 mSDtfsCounter, 1564 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1564 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:22,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1564 Valid, 270 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1441 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-20 23:55:22,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183786 states. [2022-07-20 23:55:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183786 to 183785. [2022-07-20 23:55:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183785 states, 183784 states have (on average 1.0495255299699648) internal successors, (192886), 183784 states have internal predecessors, (192886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:25,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183785 states to 183785 states and 192886 transitions. [2022-07-20 23:55:25,210 INFO L78 Accepts]: Start accepts. Automaton has 183785 states and 192886 transitions. Word has length 523 [2022-07-20 23:55:25,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 23:55:25,211 INFO L495 AbstractCegarLoop]: Abstraction has 183785 states and 192886 transitions. [2022-07-20 23:55:25,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.0) internal successors, (216), 2 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:25,211 INFO L276 IsEmpty]: Start isEmpty. Operand 183785 states and 192886 transitions. [2022-07-20 23:55:25,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 529 [2022-07-20 23:55:25,236 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 23:55:25,237 INFO L195 NwaCegarLoop]: trace histogram [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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 23:55:25,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-20 23:55:25,237 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 23:55:25,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 23:55:25,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1038230381, now seen corresponding path program 1 times [2022-07-20 23:55:25,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 23:55:25,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251947598] [2022-07-20 23:55:25,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 23:55:25,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 23:55:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 23:55:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1015 backedges. 473 proven. 0 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-07-20 23:55:25,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 23:55:25,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251947598] [2022-07-20 23:55:25,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251947598] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 23:55:25,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 23:55:25,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-20 23:55:25,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893186373] [2022-07-20 23:55:25,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 23:55:25,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-20 23:55:25,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 23:55:25,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-20 23:55:25,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-20 23:55:25,446 INFO L87 Difference]: Start difference. First operand 183785 states and 192886 transitions. Second operand has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 23:55:28,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 23:55:29,000 INFO L93 Difference]: Finished difference Result 366785 states and 384978 transitions. [2022-07-20 23:55:29,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-20 23:55:29,001 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.33333333333333) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 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 528 [2022-07-20 23:55:29,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 23:55:29,219 INFO L225 Difference]: With dead ends: 366785 [2022-07-20 23:55:29,219 INFO L226 Difference]: Without dead ends: 183789 [2022-07-20 23:55:29,285 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 [2022-07-20 23:55:29,285 INFO L413 NwaCegarLoop]: 1600 mSDtfsCounter, 802 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 2361 mSolverCounterSat, 378 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 802 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 378 IncrementalHoareTripleChecker+Valid, 2361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-07-20 23:55:29,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [802 Valid, 1725 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [378 Valid, 2361 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-07-20 23:55:29,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183789 states.