./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label59.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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_label59.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 e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:42:48,195 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:42:48,197 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:42:48,229 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:42:48,230 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:42:48,233 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:42:48,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:42:48,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:42:48,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:42:48,243 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:42:48,244 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:42:48,245 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:42:48,245 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:42:48,247 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:42:48,248 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:42:48,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:42:48,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:42:48,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:42:48,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:42:48,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:42:48,262 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:42:48,263 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:42:48,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:42:48,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:42:48,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:42:48,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:42:48,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:42:48,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:42:48,269 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:42:48,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:42:48,270 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:42:48,271 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:42:48,272 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:42:48,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:42:48,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:42:48,274 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:42:48,274 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:42:48,275 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:42:48,275 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:42:48,275 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:42:48,276 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:42:48,276 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:42:48,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:42:48,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:42:48,305 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:42:48,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:42:48,306 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:42:48,306 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:42:48,307 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:42:48,307 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:42:48,307 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:42:48,307 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:42:48,308 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:42:48,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:42:48,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:42:48,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:42:48,308 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:42:48,309 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:42:48,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:42:48,310 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:42:48,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:42:48,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:48,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:42:48,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:42:48,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:42:48,312 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:42:48,313 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e95469d39d3368d14177394b02d3829b8d37dd10304149f6e91cf64fc01c6cbc [2021-12-17 04:42:48,510 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:42:48,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:42:48,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:42:48,534 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:42:48,535 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:42:48,536 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-17 04:42:48,592 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a481a56ac/d181d349e9bb4c82ab53776c9e9a7ece/FLAG4b5a140f4 [2021-12-17 04:42:49,238 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:42:49,239 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label59.c [2021-12-17 04:42:49,287 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a481a56ac/d181d349e9bb4c82ab53776c9e9a7ece/FLAG4b5a140f4 [2021-12-17 04:42:49,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a481a56ac/d181d349e9bb4c82ab53776c9e9a7ece [2021-12-17 04:42:49,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:42:49,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:42:49,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:49,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:42:49,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:42:49,404 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:49" (1/1) ... [2021-12-17 04:42:49,405 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63cf242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:49, skipping insertion in model container [2021-12-17 04:42:49,405 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:42:49" (1/1) ... [2021-12-17 04:42:49,410 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:42:49,519 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:42:49,748 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_label59.c[6607,6620] [2021-12-17 04:42:50,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:50,382 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:42:50,421 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_label59.c[6607,6620] [2021-12-17 04:42:50,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:42:50,762 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:42:50,763 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50 WrapperNode [2021-12-17 04:42:50,763 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:42:50,764 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:50,764 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:42:50,764 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:42:50,768 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:50,820 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,306 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:42:51,306 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:42:51,319 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:42:51,319 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:42:51,319 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:42:51,325 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,421 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,709 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,830 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:42:51,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:42:51,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:42:51,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:42:51,848 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (1/1) ... [2021-12-17 04:42:51,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:42:51,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:42:51,880 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) [2021-12-17 04:42:51,895 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 [2021-12-17 04:42:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:42:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:42:51,951 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:42:51,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:42:52,054 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:42:52,055 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:42:55,487 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:42:55,511 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:42:55,511 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:42:55,514 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:55 BoogieIcfgContainer [2021-12-17 04:42:55,514 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:42:55,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:42:55,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:42:55,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:42:55,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:42:49" (1/3) ... [2021-12-17 04:42:55,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:55, skipping insertion in model container [2021-12-17 04:42:55,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:42:50" (2/3) ... [2021-12-17 04:42:55,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d1b4cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:42:55, skipping insertion in model container [2021-12-17 04:42:55,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:42:55" (3/3) ... [2021-12-17 04:42:55,520 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label59.c [2021-12-17 04:42:55,523 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:42:55,523 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:42:55,569 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:42:55,574 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-17 04:42:55,574 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:42:55,598 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) [2021-12-17 04:42:55,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-12-17 04:42:55,604 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:42:55,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:42:55,604 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:42:55,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:42:55,608 INFO L85 PathProgramCache]: Analyzing trace with hash 291089130, now seen corresponding path program 1 times [2021-12-17 04:42:55,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:42:55,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813061792] [2021-12-17 04:42:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:42:55,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:42:55,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:42:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:42:55,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:42:55,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813061792] [2021-12-17 04:42:55,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813061792] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:42:55,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:42:55,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:42:55,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144519660] [2021-12-17 04:42:55,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:42:55,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:42:55,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:42:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:42:55,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:42:55,843 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 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:00,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:00,031 INFO L93 Difference]: Finished difference Result 3160 states and 5843 transitions. [2021-12-17 04:43:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:00,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 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 46 [2021-12-17 04:43:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:00,055 INFO L225 Difference]: With dead ends: 3160 [2021-12-17 04:43:00,055 INFO L226 Difference]: Without dead ends: 1983 [2021-12-17 04:43:00,061 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:00,065 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 1057 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 974 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 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, 4.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:00,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1057 Valid, 340 Invalid, 4004 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [974 Valid, 3030 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-12-17 04:43:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2021-12-17 04:43:00,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1930. [2021-12-17 04:43:00,178 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) [2021-12-17 04:43:00,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1930 states to 1930 states and 3467 transitions. [2021-12-17 04:43:00,188 INFO L78 Accepts]: Start accepts. Automaton has 1930 states and 3467 transitions. Word has length 46 [2021-12-17 04:43:00,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:00,188 INFO L470 AbstractCegarLoop]: Abstraction has 1930 states and 3467 transitions. [2021-12-17 04:43:00,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 2 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:00,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1930 states and 3467 transitions. [2021-12-17 04:43:00,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-17 04:43:00,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:00,198 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:00,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:43:00,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:00,203 INFO L85 PathProgramCache]: Analyzing trace with hash -928496590, now seen corresponding path program 1 times [2021-12-17 04:43:00,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:00,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051437517] [2021-12-17 04:43:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:00,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:00,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:00,353 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:00,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:00,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051437517] [2021-12-17 04:43:00,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051437517] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:00,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:00,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:00,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873997896] [2021-12-17 04:43:00,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:00,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:00,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:00,357 INFO L87 Difference]: Start difference. First operand 1930 states and 3467 transitions. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:05,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:05,568 INFO L93 Difference]: Finished difference Result 6254 states and 11380 transitions. [2021-12-17 04:43:05,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:05,569 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 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 111 [2021-12-17 04:43:05,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:05,581 INFO L225 Difference]: With dead ends: 6254 [2021-12-17 04:43:05,581 INFO L226 Difference]: Without dead ends: 4326 [2021-12-17 04:43:05,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:43:05,587 INFO L933 BasicCegarLoop]: 737 mSDtfsCounter, 2618 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 4156 mSolverCounterSat, 1434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2618 SdHoareTripleChecker+Valid, 1036 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1434 IncrementalHoareTripleChecker+Valid, 4156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:05,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2618 Valid, 1036 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1434 Valid, 4156 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 04:43:05,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-12-17 04:43:05,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 4323. [2021-12-17 04:43:05,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4323 states, 4322 states have (on average 1.529615918556224) internal successors, (6611), 4322 states have internal predecessors, (6611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:05,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4323 states to 4323 states and 6611 transitions. [2021-12-17 04:43:05,648 INFO L78 Accepts]: Start accepts. Automaton has 4323 states and 6611 transitions. Word has length 111 [2021-12-17 04:43:05,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:05,649 INFO L470 AbstractCegarLoop]: Abstraction has 4323 states and 6611 transitions. [2021-12-17 04:43:05,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:05,649 INFO L276 IsEmpty]: Start isEmpty. Operand 4323 states and 6611 transitions. [2021-12-17 04:43:05,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-12-17 04:43:05,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:05,650 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:05,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:43:05,651 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -339079179, now seen corresponding path program 1 times [2021-12-17 04:43:05,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:05,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280031801] [2021-12-17 04:43:05,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:05,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:05,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:05,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280031801] [2021-12-17 04:43:05,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280031801] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:05,764 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:05,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:05,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573813909] [2021-12-17 04:43:05,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:05,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:05,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:05,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:05,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:05,766 INFO L87 Difference]: Start difference. First operand 4323 states and 6611 transitions. Second operand has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:08,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:08,232 INFO L93 Difference]: Finished difference Result 7844 states and 12416 transitions. [2021-12-17 04:43:08,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:08,232 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 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 171 [2021-12-17 04:43:08,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:08,250 INFO L225 Difference]: With dead ends: 7844 [2021-12-17 04:43:08,251 INFO L226 Difference]: Without dead ends: 4310 [2021-12-17 04:43:08,257 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:08,258 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1086 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 2355 mSolverCounterSat, 598 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 1675 SdHoareTripleChecker+Invalid, 2953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 598 IncrementalHoareTripleChecker+Valid, 2355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:08,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 1675 Invalid, 2953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [598 Valid, 2355 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-17 04:43:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2021-12-17 04:43:08,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4307. [2021-12-17 04:43:08,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4307 states, 4306 states have (on average 1.361356247097074) internal successors, (5862), 4306 states have internal predecessors, (5862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 5862 transitions. [2021-12-17 04:43:08,337 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 5862 transitions. Word has length 171 [2021-12-17 04:43:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:08,337 INFO L470 AbstractCegarLoop]: Abstraction has 4307 states and 5862 transitions. [2021-12-17 04:43:08,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.0) internal successors, (171), 3 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 5862 transitions. [2021-12-17 04:43:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-12-17 04:43:08,339 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:08,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:08,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:43:08,340 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:08,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:08,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1790168010, now seen corresponding path program 1 times [2021-12-17 04:43:08,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:08,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161741726] [2021-12-17 04:43:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:08,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:08,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:08,471 INFO L134 CoverageAnalysis]: Checked inductivity of 178 backedges. 178 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:08,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:08,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161741726] [2021-12-17 04:43:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161741726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:08,472 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:08,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:08,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700587971] [2021-12-17 04:43:08,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:08,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:08,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:08,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:08,475 INFO L87 Difference]: Start difference. First operand 4307 states and 5862 transitions. Second operand has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:11,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:11,475 INFO L93 Difference]: Finished difference Result 11006 states and 15563 transitions. [2021-12-17 04:43:11,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:11,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 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 234 [2021-12-17 04:43:11,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:11,498 INFO L225 Difference]: With dead ends: 11006 [2021-12-17 04:43:11,499 INFO L226 Difference]: Without dead ends: 7488 [2021-12-17 04:43:11,506 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:11,507 INFO L933 BasicCegarLoop]: 1504 mSDtfsCounter, 936 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 944 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 936 SdHoareTripleChecker+Valid, 1555 SdHoareTripleChecker+Invalid, 3452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 944 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:11,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [936 Valid, 1555 Invalid, 3452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [944 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:11,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7488 states. [2021-12-17 04:43:11,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7488 to 7465. [2021-12-17 04:43:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7465 states, 7464 states have (on average 1.3766077170418007) internal successors, (10275), 7464 states have internal predecessors, (10275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7465 states to 7465 states and 10275 transitions. [2021-12-17 04:43:11,659 INFO L78 Accepts]: Start accepts. Automaton has 7465 states and 10275 transitions. Word has length 234 [2021-12-17 04:43:11,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:11,661 INFO L470 AbstractCegarLoop]: Abstraction has 7465 states and 10275 transitions. [2021-12-17 04:43:11,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.0) internal successors, (234), 3 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:11,661 INFO L276 IsEmpty]: Start isEmpty. Operand 7465 states and 10275 transitions. [2021-12-17 04:43:11,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-12-17 04:43:11,663 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:11,663 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:11,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:43:11,664 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:11,664 INFO L85 PathProgramCache]: Analyzing trace with hash 528389062, now seen corresponding path program 1 times [2021-12-17 04:43:11,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:11,665 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527074978] [2021-12-17 04:43:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:11,665 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:11,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:11,776 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-17 04:43:11,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:11,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527074978] [2021-12-17 04:43:11,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527074978] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:11,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:11,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:43:11,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262252598] [2021-12-17 04:43:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:11,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:11,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:11,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:11,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:11,779 INFO L87 Difference]: Start difference. First operand 7465 states and 10275 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:14,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:14,866 INFO L93 Difference]: Finished difference Result 20464 states and 28783 transitions. [2021-12-17 04:43:14,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:14,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 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 237 [2021-12-17 04:43:14,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:14,910 INFO L225 Difference]: With dead ends: 20464 [2021-12-17 04:43:14,911 INFO L226 Difference]: Without dead ends: 13788 [2021-12-17 04:43:14,923 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:14,925 INFO L933 BasicCegarLoop]: 697 mSDtfsCounter, 926 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2509 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 926 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 3280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:14,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [926 Valid, 829 Invalid, 3280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2509 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:14,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13788 states. [2021-12-17 04:43:15,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13788 to 13777. [2021-12-17 04:43:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13777 states, 13776 states have (on average 1.2952961672473868) internal successors, (17844), 13776 states have internal predecessors, (17844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:15,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13777 states to 13777 states and 17844 transitions. [2021-12-17 04:43:15,142 INFO L78 Accepts]: Start accepts. Automaton has 13777 states and 17844 transitions. Word has length 237 [2021-12-17 04:43:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:15,142 INFO L470 AbstractCegarLoop]: Abstraction has 13777 states and 17844 transitions. [2021-12-17 04:43:15,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13777 states and 17844 transitions. [2021-12-17 04:43:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 04:43:15,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:15,147 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:15,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:43:15,148 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:15,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:15,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1541403827, now seen corresponding path program 1 times [2021-12-17 04:43:15,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:15,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87696872] [2021-12-17 04:43:15,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:15,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:15,220 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:15,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:15,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87696872] [2021-12-17 04:43:15,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87696872] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:15,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:15,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:15,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747534805] [2021-12-17 04:43:15,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:15,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:15,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:15,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:15,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:15,223 INFO L87 Difference]: Start difference. First operand 13777 states and 17844 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:18,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:18,320 INFO L93 Difference]: Finished difference Result 33096 states and 43091 transitions. [2021-12-17 04:43:18,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:18,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 258 [2021-12-17 04:43:18,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:18,363 INFO L225 Difference]: With dead ends: 33096 [2021-12-17 04:43:18,363 INFO L226 Difference]: Without dead ends: 20108 [2021-12-17 04:43:18,372 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:18,374 INFO L933 BasicCegarLoop]: 1830 mSDtfsCounter, 749 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 2587 mSolverCounterSat, 622 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1970 SdHoareTripleChecker+Invalid, 3209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 622 IncrementalHoareTripleChecker+Valid, 2587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:18,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1970 Invalid, 3209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [622 Valid, 2587 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:18,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20108 states. [2021-12-17 04:43:18,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20108 to 20078. [2021-12-17 04:43:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20078 states, 20077 states have (on average 1.2317577327289935) internal successors, (24730), 20077 states have internal predecessors, (24730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:18,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20078 states to 20078 states and 24730 transitions. [2021-12-17 04:43:18,590 INFO L78 Accepts]: Start accepts. Automaton has 20078 states and 24730 transitions. Word has length 258 [2021-12-17 04:43:18,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:18,591 INFO L470 AbstractCegarLoop]: Abstraction has 20078 states and 24730 transitions. [2021-12-17 04:43:18,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand 20078 states and 24730 transitions. [2021-12-17 04:43:18,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-12-17 04:43:18,595 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:18,596 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:18,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:43:18,596 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:18,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:18,597 INFO L85 PathProgramCache]: Analyzing trace with hash -824584201, now seen corresponding path program 1 times [2021-12-17 04:43:18,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:18,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202807112] [2021-12-17 04:43:18,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:18,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 90 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:18,802 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:18,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202807112] [2021-12-17 04:43:18,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202807112] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:18,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149686868] [2021-12-17 04:43:18,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:18,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:18,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:18,804 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) [2021-12-17 04:43:18,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:43:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:18,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:19,317 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:43:19,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:19,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149686868] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:19,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:19,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:43:19,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164021574] [2021-12-17 04:43:19,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:19,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:19,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:19,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:19,319 INFO L87 Difference]: Start difference. First operand 20078 states and 24730 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:22,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:22,499 INFO L93 Difference]: Finished difference Result 57468 states and 71270 transitions. [2021-12-17 04:43:22,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:22,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 287 [2021-12-17 04:43:22,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:22,570 INFO L225 Difference]: With dead ends: 57468 [2021-12-17 04:43:22,570 INFO L226 Difference]: Without dead ends: 38179 [2021-12-17 04:43:22,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:22,595 INFO L933 BasicCegarLoop]: 1643 mSDtfsCounter, 983 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2573 mSolverCounterSat, 725 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 983 SdHoareTripleChecker+Valid, 1724 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 725 IncrementalHoareTripleChecker+Valid, 2573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:22,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [983 Valid, 1724 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [725 Valid, 2573 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:22,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38179 states. [2021-12-17 04:43:23,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38179 to 34243. [2021-12-17 04:43:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34243 states, 34242 states have (on average 1.2130424624729863) internal successors, (41537), 34242 states have internal predecessors, (41537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34243 states to 34243 states and 41537 transitions. [2021-12-17 04:43:23,126 INFO L78 Accepts]: Start accepts. Automaton has 34243 states and 41537 transitions. Word has length 287 [2021-12-17 04:43:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:23,127 INFO L470 AbstractCegarLoop]: Abstraction has 34243 states and 41537 transitions. [2021-12-17 04:43:23,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 34243 states and 41537 transitions. [2021-12-17 04:43:23,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-12-17 04:43:23,132 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:23,132 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-17 04:43:23,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 04:43:23,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:23,348 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:23,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:23,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1943117730, now seen corresponding path program 1 times [2021-12-17 04:43:23,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:23,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670027435] [2021-12-17 04:43:23,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:23,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:23,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:23,574 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 131 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:43:23,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670027435] [2021-12-17 04:43:23,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670027435] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:23,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339938284] [2021-12-17 04:43:23,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:23,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:23,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:23,576 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) [2021-12-17 04:43:23,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 04:43:23,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:23,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:24,196 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 87 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-12-17 04:43:24,196 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:24,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339938284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:24,197 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:24,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-12-17 04:43:24,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727071845] [2021-12-17 04:43:24,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:24,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:24,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:24,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:24,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:24,198 INFO L87 Difference]: Start difference. First operand 34243 states and 41537 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:27,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:27,056 INFO L93 Difference]: Finished difference Result 71624 states and 86793 transitions. [2021-12-17 04:43:27,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:27,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 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 288 [2021-12-17 04:43:27,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:27,105 INFO L225 Difference]: With dead ends: 71624 [2021-12-17 04:43:27,106 INFO L226 Difference]: Without dead ends: 36591 [2021-12-17 04:43:27,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:27,134 INFO L933 BasicCegarLoop]: 810 mSDtfsCounter, 854 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 2297 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 854 SdHoareTripleChecker+Valid, 944 SdHoareTripleChecker+Invalid, 3044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 2297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:27,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [854 Valid, 944 Invalid, 3044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [747 Valid, 2297 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:43:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36591 states. [2021-12-17 04:43:27,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36591 to 35013. [2021-12-17 04:43:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.132725922540843) internal successors, (39659), 35012 states have internal predecessors, (39659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 39659 transitions. [2021-12-17 04:43:27,505 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 39659 transitions. Word has length 288 [2021-12-17 04:43:27,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:27,506 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 39659 transitions. [2021-12-17 04:43:27,506 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 2 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 39659 transitions. [2021-12-17 04:43:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-17 04:43:27,514 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:27,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:27,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 04:43:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-12-17 04:43:27,723 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:27,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:27,723 INFO L85 PathProgramCache]: Analyzing trace with hash 609106699, now seen corresponding path program 1 times [2021-12-17 04:43:27,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:27,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139013760] [2021-12-17 04:43:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:27,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:28,025 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 315 proven. 110 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-12-17 04:43:28,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:28,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139013760] [2021-12-17 04:43:28,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139013760] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:28,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792622686] [2021-12-17 04:43:28,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:28,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:28,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:28,027 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:43:28,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-17 04:43:28,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:28,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:28,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:28,623 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:43:28,623 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:28,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792622686] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:28,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:28,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:43:28,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948170130] [2021-12-17 04:43:28,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:28,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:28,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:28,626 INFO L87 Difference]: Start difference. First operand 35013 states and 39659 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:31,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:31,807 INFO L93 Difference]: Finished difference Result 70832 states and 80144 transitions. [2021-12-17 04:43:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:31,807 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 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 402 [2021-12-17 04:43:31,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:31,868 INFO L225 Difference]: With dead ends: 70832 [2021-12-17 04:43:31,869 INFO L226 Difference]: Without dead ends: 36608 [2021-12-17 04:43:31,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 401 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:43:31,901 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 769 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 2440 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1077 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:31,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [769 Valid, 1077 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2440 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:43:31,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36608 states. [2021-12-17 04:43:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36608 to 35013. [2021-12-17 04:43:32,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35013 states, 35012 states have (on average 1.0884839483605622) internal successors, (38110), 35012 states have internal predecessors, (38110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:32,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35013 states to 35013 states and 38110 transitions. [2021-12-17 04:43:32,273 INFO L78 Accepts]: Start accepts. Automaton has 35013 states and 38110 transitions. Word has length 402 [2021-12-17 04:43:32,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:32,273 INFO L470 AbstractCegarLoop]: Abstraction has 35013 states and 38110 transitions. [2021-12-17 04:43:32,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 35013 states and 38110 transitions. [2021-12-17 04:43:32,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2021-12-17 04:43:32,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:32,283 INFO L514 BasicCegarLoop]: 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, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-12-17 04:43:32,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-17 04:43:32,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:32,495 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:32,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:32,496 INFO L85 PathProgramCache]: Analyzing trace with hash -70918865, now seen corresponding path program 1 times [2021-12-17 04:43:32,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:32,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944695822] [2021-12-17 04:43:32,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:32,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:32,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:32,578 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 559 proven. 0 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2021-12-17 04:43:32,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944695822] [2021-12-17 04:43:32,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944695822] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:32,579 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:32,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:32,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427784628] [2021-12-17 04:43:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:32,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:43:32,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:32,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:43:32,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:43:32,581 INFO L87 Difference]: Start difference. First operand 35013 states and 38110 transitions. Second operand has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:38,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:38,496 INFO L93 Difference]: Finished difference Result 104857 states and 114546 transitions. [2021-12-17 04:43:38,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:43:38,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 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 451 [2021-12-17 04:43:38,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:38,582 INFO L225 Difference]: With dead ends: 104857 [2021-12-17 04:43:38,582 INFO L226 Difference]: Without dead ends: 70633 [2021-12-17 04:43:38,615 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:38,615 INFO L933 BasicCegarLoop]: 611 mSDtfsCounter, 1705 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 5987 mSolverCounterSat, 1052 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1705 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 7039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1052 IncrementalHoareTripleChecker+Valid, 5987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:38,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1705 Valid, 796 Invalid, 7039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1052 Valid, 5987 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-17 04:43:38,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70633 states. [2021-12-17 04:43:39,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70633 to 48407. [2021-12-17 04:43:39,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48407 states, 48406 states have (on average 1.0793496673966037) internal successors, (52247), 48406 states have internal predecessors, (52247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:39,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48407 states to 48407 states and 52247 transitions. [2021-12-17 04:43:39,115 INFO L78 Accepts]: Start accepts. Automaton has 48407 states and 52247 transitions. Word has length 451 [2021-12-17 04:43:39,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:39,115 INFO L470 AbstractCegarLoop]: Abstraction has 48407 states and 52247 transitions. [2021-12-17 04:43:39,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 79.5) internal successors, (318), 3 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:39,116 INFO L276 IsEmpty]: Start isEmpty. Operand 48407 states and 52247 transitions. [2021-12-17 04:43:39,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2021-12-17 04:43:39,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:39,124 INFO L514 BasicCegarLoop]: 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, 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, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:39,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:43:39,125 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:39,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:39,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1887672211, now seen corresponding path program 1 times [2021-12-17 04:43:39,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:39,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114469766] [2021-12-17 04:43:39,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:39,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:39,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-12-17 04:43:39,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:39,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114469766] [2021-12-17 04:43:39,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114469766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:39,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:39,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:39,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198688182] [2021-12-17 04:43:39,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:39,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:39,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:39,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:39,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:39,235 INFO L87 Difference]: Start difference. First operand 48407 states and 52247 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:43,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:43,130 INFO L93 Difference]: Finished difference Result 127648 states and 138320 transitions. [2021-12-17 04:43:43,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:43,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 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 477 [2021-12-17 04:43:43,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:43,229 INFO L225 Difference]: With dead ends: 127648 [2021-12-17 04:43:43,229 INFO L226 Difference]: Without dead ends: 80030 [2021-12-17 04:43:43,262 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:43,263 INFO L933 BasicCegarLoop]: 658 mSDtfsCounter, 843 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 604 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 843 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 3582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 604 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:43,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [843 Valid, 771 Invalid, 3582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [604 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2021-12-17 04:43:43,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80030 states. [2021-12-17 04:43:43,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80030 to 78351. [2021-12-17 04:43:44,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78351 states, 78350 states have (on average 1.0781238034460754) internal successors, (84471), 78350 states have internal predecessors, (84471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:44,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78351 states to 78351 states and 84471 transitions. [2021-12-17 04:43:44,095 INFO L78 Accepts]: Start accepts. Automaton has 78351 states and 84471 transitions. Word has length 477 [2021-12-17 04:43:44,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:44,096 INFO L470 AbstractCegarLoop]: Abstraction has 78351 states and 84471 transitions. [2021-12-17 04:43:44,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:44,096 INFO L276 IsEmpty]: Start isEmpty. Operand 78351 states and 84471 transitions. [2021-12-17 04:43:44,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-12-17 04:43:44,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:44,105 INFO L514 BasicCegarLoop]: 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, 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, 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] [2021-12-17 04:43:44,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:43:44,105 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:44,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:44,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1027665506, now seen corresponding path program 1 times [2021-12-17 04:43:44,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:44,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179223449] [2021-12-17 04:43:44,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:44,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:44,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 543 proven. 0 refuted. 0 times theorem prover too weak. 433 trivial. 0 not checked. [2021-12-17 04:43:44,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:44,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179223449] [2021-12-17 04:43:44,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179223449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:44,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:44,211 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:44,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501426135] [2021-12-17 04:43:44,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:44,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:44,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:44,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:44,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:44,212 INFO L87 Difference]: Start difference. First operand 78351 states and 84471 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:47,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:47,782 INFO L93 Difference]: Finished difference Result 181896 states and 197490 transitions. [2021-12-17 04:43:47,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:47,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 486 [2021-12-17 04:43:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:47,932 INFO L225 Difference]: With dead ends: 181896 [2021-12-17 04:43:47,933 INFO L226 Difference]: Without dead ends: 104334 [2021-12-17 04:43:48,057 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:48,058 INFO L933 BasicCegarLoop]: 741 mSDtfsCounter, 890 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 890 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 821 SdHoareTripleChecker+Invalid, 3288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 890 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:48,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [890 Valid, 821 Invalid, 3288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [890 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:43:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104334 states. [2021-12-17 04:43:49,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104334 to 102744. [2021-12-17 04:43:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102744 states, 102743 states have (on average 1.0806283639761347) internal successors, (111027), 102743 states have internal predecessors, (111027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:49,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102744 states to 102744 states and 111027 transitions. [2021-12-17 04:43:49,192 INFO L78 Accepts]: Start accepts. Automaton has 102744 states and 111027 transitions. Word has length 486 [2021-12-17 04:43:49,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:49,192 INFO L470 AbstractCegarLoop]: Abstraction has 102744 states and 111027 transitions. [2021-12-17 04:43:49,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:49,193 INFO L276 IsEmpty]: Start isEmpty. Operand 102744 states and 111027 transitions. [2021-12-17 04:43:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2021-12-17 04:43:49,204 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:49,204 INFO L514 BasicCegarLoop]: 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, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:49,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:43:49,205 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:49,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:49,205 INFO L85 PathProgramCache]: Analyzing trace with hash -647290550, now seen corresponding path program 1 times [2021-12-17 04:43:49,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:49,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29501852] [2021-12-17 04:43:49,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:49,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:49,617 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 543 proven. 110 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2021-12-17 04:43:49,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:49,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29501852] [2021-12-17 04:43:49,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29501852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:43:49,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644494855] [2021-12-17 04:43:49,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:49,618 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:49,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:43:49,619 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:43:49,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-17 04:43:49,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:49,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:43:49,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:43:50,458 INFO L134 CoverageAnalysis]: Checked inductivity of 853 backedges. 628 proven. 0 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2021-12-17 04:43:50,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:43:50,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644494855] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:50,458 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:43:50,458 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:43:50,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480735459] [2021-12-17 04:43:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:50,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:50,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:50,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:50,460 INFO L87 Difference]: Start difference. First operand 102744 states and 111027 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) [2021-12-17 04:43:53,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:53,985 INFO L93 Difference]: Finished difference Result 215696 states and 233424 transitions. [2021-12-17 04:43:53,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:53,986 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 518 [2021-12-17 04:43:53,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:54,144 INFO L225 Difference]: With dead ends: 215696 [2021-12-17 04:43:54,144 INFO L226 Difference]: Without dead ends: 113741 [2021-12-17 04:43:54,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 517 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:43:54,185 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 1202 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 2259 mSolverCounterSat, 813 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1202 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 3072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 813 IncrementalHoareTripleChecker+Valid, 2259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:54,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1202 Valid, 387 Invalid, 3072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [813 Valid, 2259 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:43:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113741 states. [2021-12-17 04:43:55,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113741 to 113741. [2021-12-17 04:43:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113741 states, 113740 states have (on average 1.0713205556532441) internal successors, (121852), 113740 states have internal predecessors, (121852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113741 states to 113741 states and 121852 transitions. [2021-12-17 04:43:55,397 INFO L78 Accepts]: Start accepts. Automaton has 113741 states and 121852 transitions. Word has length 518 [2021-12-17 04:43:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:43:55,397 INFO L470 AbstractCegarLoop]: Abstraction has 113741 states and 121852 transitions. [2021-12-17 04:43:55,397 INFO L471 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) [2021-12-17 04:43:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 113741 states and 121852 transitions. [2021-12-17 04:43:55,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 549 [2021-12-17 04:43:55,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:43:55,410 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:43:55,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-17 04:43:55,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:43:55,616 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:43:55,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:43:55,616 INFO L85 PathProgramCache]: Analyzing trace with hash -216386824, now seen corresponding path program 1 times [2021-12-17 04:43:55,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:43:55,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984523272] [2021-12-17 04:43:55,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:43:55,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:43:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:43:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 480 backedges. 356 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-12-17 04:43:56,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:43:56,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984523272] [2021-12-17 04:43:56,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984523272] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:43:56,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:43:56,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:43:56,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070918547] [2021-12-17 04:43:56,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:43:56,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:43:56,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:43:56,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:43:56,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:43:56,025 INFO L87 Difference]: Start difference. First operand 113741 states and 121852 transitions. Second operand has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:43:59,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:43:59,771 INFO L93 Difference]: Finished difference Result 251885 states and 270934 transitions. [2021-12-17 04:43:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:43:59,771 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 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 548 [2021-12-17 04:43:59,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:43:59,944 INFO L225 Difference]: With dead ends: 251885 [2021-12-17 04:43:59,944 INFO L226 Difference]: Without dead ends: 138933 [2021-12-17 04:43:59,971 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:43:59,972 INFO L933 BasicCegarLoop]: 1732 mSDtfsCounter, 748 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 3053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:43:59,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 1868 Invalid, 3053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 2479 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-17 04:44:00,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138933 states. [2021-12-17 04:44:01,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138933 to 137351. [2021-12-17 04:44:01,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137351 states, 137350 states have (on average 1.0658536585365854) internal successors, (146395), 137350 states have internal predecessors, (146395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137351 states to 137351 states and 146395 transitions. [2021-12-17 04:44:01,693 INFO L78 Accepts]: Start accepts. Automaton has 137351 states and 146395 transitions. Word has length 548 [2021-12-17 04:44:01,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:44:01,693 INFO L470 AbstractCegarLoop]: Abstraction has 137351 states and 146395 transitions. [2021-12-17 04:44:01,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 141.66666666666666) internal successors, (425), 3 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 137351 states and 146395 transitions. [2021-12-17 04:44:01,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 662 [2021-12-17 04:44:01,718 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:44:01,718 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:44:01,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:44:01,718 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:44:01,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:44:01,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2008885772, now seen corresponding path program 1 times [2021-12-17 04:44:01,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:44:01,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440040949] [2021-12-17 04:44:01,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:01,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:44:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 1340 proven. 0 refuted. 0 times theorem prover too weak. 611 trivial. 0 not checked. [2021-12-17 04:44:01,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:44:01,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440040949] [2021-12-17 04:44:01,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440040949] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:44:01,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:44:01,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:44:01,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902608468] [2021-12-17 04:44:01,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:44:01,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:44:01,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:44:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:44:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:44:01,868 INFO L87 Difference]: Start difference. First operand 137351 states and 146395 transitions. Second operand has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:44:05,348 INFO L93 Difference]: Finished difference Result 274702 states and 292730 transitions. [2021-12-17 04:44:05,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:44:05,349 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 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 661 [2021-12-17 04:44:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:44:05,527 INFO L225 Difference]: With dead ends: 274702 [2021-12-17 04:44:05,527 INFO L226 Difference]: Without dead ends: 138140 [2021-12-17 04:44:05,580 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:44:05,581 INFO L933 BasicCegarLoop]: 1379 mSDtfsCounter, 947 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2463 mSolverCounterSat, 504 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 947 SdHoareTripleChecker+Valid, 1460 SdHoareTripleChecker+Invalid, 2967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 504 IncrementalHoareTripleChecker+Valid, 2463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:44:05,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [947 Valid, 1460 Invalid, 2967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [504 Valid, 2463 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:44:05,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138140 states. [2021-12-17 04:44:06,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138140 to 136555. [2021-12-17 04:44:06,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136555 states, 136554 states have (on average 1.054322831993204) internal successors, (143972), 136554 states have internal predecessors, (143972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:07,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136555 states to 136555 states and 143972 transitions. [2021-12-17 04:44:07,127 INFO L78 Accepts]: Start accepts. Automaton has 136555 states and 143972 transitions. Word has length 661 [2021-12-17 04:44:07,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:44:07,127 INFO L470 AbstractCegarLoop]: Abstraction has 136555 states and 143972 transitions. [2021-12-17 04:44:07,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 101.33333333333333) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:07,127 INFO L276 IsEmpty]: Start isEmpty. Operand 136555 states and 143972 transitions. [2021-12-17 04:44:07,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 718 [2021-12-17 04:44:07,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:44:07,160 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:44:07,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-17 04:44:07,161 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:44:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:44:07,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1694170247, now seen corresponding path program 1 times [2021-12-17 04:44:07,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:44:07,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343272066] [2021-12-17 04:44:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:07,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:44:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:07,367 INFO L134 CoverageAnalysis]: Checked inductivity of 2095 backedges. 1492 proven. 75 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2021-12-17 04:44:07,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:44:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343272066] [2021-12-17 04:44:07,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343272066] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:44:07,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091518577] [2021-12-17 04:44:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:07,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:44:07,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:44:07,370 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:44:07,370 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-17 04:44:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:07,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 978 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:44:07,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:44:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2095 backedges. 1630 proven. 0 refuted. 0 times theorem prover too weak. 465 trivial. 0 not checked. [2021-12-17 04:44:08,969 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:44:08,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091518577] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:44:08,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:44:08,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-12-17 04:44:08,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955083399] [2021-12-17 04:44:08,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:44:08,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:44:08,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:44:08,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:44:08,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:44:08,971 INFO L87 Difference]: Start difference. First operand 136555 states and 143972 transitions. Second operand has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:13,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:44:13,102 INFO L93 Difference]: Finished difference Result 275472 states and 290486 transitions. [2021-12-17 04:44:13,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:44:13,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 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 717 [2021-12-17 04:44:13,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:44:13,278 INFO L225 Difference]: With dead ends: 275472 [2021-12-17 04:44:13,278 INFO L226 Difference]: Without dead ends: 139706 [2021-12-17 04:44:13,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 717 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-17 04:44:13,349 INFO L933 BasicCegarLoop]: 645 mSDtfsCounter, 1632 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 4552 mSolverCounterSat, 393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1632 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 4945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 393 IncrementalHoareTripleChecker+Valid, 4552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:44:13,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1632 Valid, 880 Invalid, 4945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [393 Valid, 4552 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2021-12-17 04:44:13,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139706 states. [2021-12-17 04:44:14,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139706 to 138916. [2021-12-17 04:44:14,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138916 states, 138915 states have (on average 1.0526005111039125) internal successors, (146222), 138915 states have internal predecessors, (146222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:15,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138916 states to 138916 states and 146222 transitions. [2021-12-17 04:44:15,082 INFO L78 Accepts]: Start accepts. Automaton has 138916 states and 146222 transitions. Word has length 717 [2021-12-17 04:44:15,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:44:15,083 INFO L470 AbstractCegarLoop]: Abstraction has 138916 states and 146222 transitions. [2021-12-17 04:44:15,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 107.25) internal successors, (429), 4 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:15,083 INFO L276 IsEmpty]: Start isEmpty. Operand 138916 states and 146222 transitions. [2021-12-17 04:44:15,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2021-12-17 04:44:15,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:44:15,379 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:44:15,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-17 04:44:15,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-17 04:44:15,579 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:44:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:44:15,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1516561010, now seen corresponding path program 1 times [2021-12-17 04:44:15,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:44:15,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085259117] [2021-12-17 04:44:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:15,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:44:15,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 973 proven. 110 refuted. 0 times theorem prover too weak. 1017 trivial. 0 not checked. [2021-12-17 04:44:15,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:44:15,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085259117] [2021-12-17 04:44:15,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085259117] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:44:15,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621881600] [2021-12-17 04:44:15,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:15,772 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:44:15,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:44:15,781 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:44:15,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-17 04:44:15,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:15,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-17 04:44:15,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:44:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 2100 backedges. 970 proven. 0 refuted. 0 times theorem prover too weak. 1130 trivial. 0 not checked. [2021-12-17 04:44:16,709 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:44:16,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621881600] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:44:16,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:44:16,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-17 04:44:16,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025727547] [2021-12-17 04:44:16,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:44:16,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:44:16,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:44:16,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:44:16,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:44:16,711 INFO L87 Difference]: Start difference. First operand 138916 states and 146222 transitions. Second operand has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:20,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:44:20,483 INFO L93 Difference]: Finished difference Result 324258 states and 341344 transitions. [2021-12-17 04:44:20,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:44:20,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 735 [2021-12-17 04:44:20,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:44:20,932 INFO L225 Difference]: With dead ends: 324258 [2021-12-17 04:44:20,932 INFO L226 Difference]: Without dead ends: 178250 [2021-12-17 04:44:20,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 740 GetRequests, 734 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-17 04:44:20,955 INFO L933 BasicCegarLoop]: 1573 mSDtfsCounter, 928 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 2508 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 928 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 3220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 2508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:44:20,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [928 Valid, 1686 Invalid, 3220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 2508 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-17 04:44:21,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178250 states. [2021-12-17 04:44:22,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178250 to 164870. [2021-12-17 04:44:23,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164870 states, 164869 states have (on average 1.0447931387950433) internal successors, (172254), 164869 states have internal predecessors, (172254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:23,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164870 states to 164870 states and 172254 transitions. [2021-12-17 04:44:23,211 INFO L78 Accepts]: Start accepts. Automaton has 164870 states and 172254 transitions. Word has length 735 [2021-12-17 04:44:23,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:44:23,212 INFO L470 AbstractCegarLoop]: Abstraction has 164870 states and 172254 transitions. [2021-12-17 04:44:23,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.33333333333333) internal successors, (253), 3 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:23,212 INFO L276 IsEmpty]: Start isEmpty. Operand 164870 states and 172254 transitions. [2021-12-17 04:44:23,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-12-17 04:44:23,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:44:23,244 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-12-17 04:44:23,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-17 04:44:23,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-17 04:44:23,460 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:44:23,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:44:23,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1339358634, now seen corresponding path program 1 times [2021-12-17 04:44:23,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:44:23,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368887663] [2021-12-17 04:44:23,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:23,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:44:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:23,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 1029 proven. 0 refuted. 0 times theorem prover too weak. 724 trivial. 0 not checked. [2021-12-17 04:44:23,615 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:44:23,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368887663] [2021-12-17 04:44:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368887663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:44:23,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:44:23,616 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:44:23,616 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067570212] [2021-12-17 04:44:23,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:44:23,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:44:23,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:44:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:44:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:44:23,618 INFO L87 Difference]: Start difference. First operand 164870 states and 172254 transitions. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:28,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:44:28,306 INFO L93 Difference]: Finished difference Result 338396 states and 353528 transitions. [2021-12-17 04:44:28,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:44:28,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 750 [2021-12-17 04:44:28,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:44:28,553 INFO L225 Difference]: With dead ends: 338396 [2021-12-17 04:44:28,553 INFO L226 Difference]: Without dead ends: 172738 [2021-12-17 04:44:28,619 INFO L932 BasicCegarLoop]: 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 [2021-12-17 04:44:28,620 INFO L933 BasicCegarLoop]: 750 mSDtfsCounter, 1436 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 4509 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1436 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 4795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 4509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:44:28,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1436 Valid, 1023 Invalid, 4795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 4509 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-12-17 04:44:28,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172738 states. [2021-12-17 04:44:30,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172738 to 172737. [2021-12-17 04:44:30,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172737 states, 172736 states have (on average 1.040686365320489) internal successors, (179764), 172736 states have internal predecessors, (179764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:30,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172737 states to 172737 states and 179764 transitions. [2021-12-17 04:44:30,853 INFO L78 Accepts]: Start accepts. Automaton has 172737 states and 179764 transitions. Word has length 750 [2021-12-17 04:44:30,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:44:30,853 INFO L470 AbstractCegarLoop]: Abstraction has 172737 states and 179764 transitions. [2021-12-17 04:44:30,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:30,853 INFO L276 IsEmpty]: Start isEmpty. Operand 172737 states and 179764 transitions. [2021-12-17 04:44:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2021-12-17 04:44:30,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:44:30,884 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:44:30,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-17 04:44:30,884 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:44:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:44:30,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1611549461, now seen corresponding path program 1 times [2021-12-17 04:44:30,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:44:30,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756008939] [2021-12-17 04:44:30,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:44:30,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:44:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:44:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 1250 proven. 0 refuted. 0 times theorem prover too weak. 773 trivial. 0 not checked. [2021-12-17 04:44:31,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:44:31,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756008939] [2021-12-17 04:44:31,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756008939] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:44:31,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:44:31,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:44:31,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11236378] [2021-12-17 04:44:31,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:44:31,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:44:31,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:44:31,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:44:31,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:44:31,082 INFO L87 Difference]: Start difference. First operand 172737 states and 179764 transitions. Second operand has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:44:37,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:44:37,778 INFO L93 Difference]: Finished difference Result 437740 states and 456074 transitions. [2021-12-17 04:44:37,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:44:37,779 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 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 811 [2021-12-17 04:44:37,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:44:38,121 INFO L225 Difference]: With dead ends: 437740 [2021-12-17 04:44:38,122 INFO L226 Difference]: Without dead ends: 265792 [2021-12-17 04:44:38,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:44:38,189 INFO L933 BasicCegarLoop]: 294 mSDtfsCounter, 1726 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 5217 mSolverCounterSat, 1209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1726 SdHoareTripleChecker+Valid, 457 SdHoareTripleChecker+Invalid, 6426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1209 IncrementalHoareTripleChecker+Valid, 5217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:44:38,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1726 Valid, 457 Invalid, 6426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1209 Valid, 5217 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 04:44:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265792 states.