./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label15.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/Problem19_label15.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 8295e17271be78ac0a7fd91eab40bb43faa05c2eb6916b9e37abf543b4d8bff6 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 05:19:03,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 05:19:03,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 05:19:03,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 05:19:03,036 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 05:19:03,037 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 05:19:03,038 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 05:19:03,040 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 05:19:03,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 05:19:03,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 05:19:03,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 05:19:03,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 05:19:03,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 05:19:03,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 05:19:03,053 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 05:19:03,055 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 05:19:03,056 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 05:19:03,058 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 05:19:03,060 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 05:19:03,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 05:19:03,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 05:19:03,062 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 05:19:03,063 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 05:19:03,067 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 05:19:03,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 05:19:03,069 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 05:19:03,069 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 05:19:03,070 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 05:19:03,070 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 05:19:03,071 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 05:19:03,071 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 05:19:03,072 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 05:19:03,072 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 05:19:03,073 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 05:19:03,073 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 05:19:03,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 05:19:03,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 05:19:03,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 05:19:03,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 05:19:03,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 05:19:03,075 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 05:19:03,076 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 05:19:03,096 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 05:19:03,099 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 05:19:03,099 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 05:19:03,100 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 05:19:03,100 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 05:19:03,100 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 05:19:03,101 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 05:19:03,101 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 05:19:03,104 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 05:19:03,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 05:19:03,105 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 05:19:03,105 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 05:19:03,105 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 05:19:03,105 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 05:19:03,105 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 05:19:03,106 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 05:19:03,106 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 05:19:03,107 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 05:19:03,107 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 05:19:03,107 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:19:03,107 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 05:19:03,107 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 05:19:03,108 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 05:19:03,108 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 05:19:03,108 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 05:19:03,109 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 05:19:03,109 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 05:19:03,109 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 05:19:03,109 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 05:19:03,109 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8295e17271be78ac0a7fd91eab40bb43faa05c2eb6916b9e37abf543b4d8bff6 [2021-12-17 05:19:03,305 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 05:19:03,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 05:19:03,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 05:19:03,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 05:19:03,329 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 05:19:03,331 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label15.c [2021-12-17 05:19:03,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d935a860f/9be3c14a99b0499e85e6cfe34bbd0dd2/FLAGefa1aa555 [2021-12-17 05:19:04,170 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 05:19:04,171 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label15.c [2021-12-17 05:19:04,220 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d935a860f/9be3c14a99b0499e85e6cfe34bbd0dd2/FLAGefa1aa555 [2021-12-17 05:19:04,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d935a860f/9be3c14a99b0499e85e6cfe34bbd0dd2 [2021-12-17 05:19:04,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 05:19:04,369 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 05:19:04,371 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 05:19:04,371 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 05:19:04,374 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 05:19:04,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:19:04" (1/1) ... [2021-12-17 05:19:04,375 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36812f80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:04, skipping insertion in model container [2021-12-17 05:19:04,375 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 05:19:04" (1/1) ... [2021-12-17 05:19:04,391 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 05:19:04,501 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 05:19:04,718 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/Problem19_label15.c[7551,7564] [2021-12-17 05:19:05,616 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:19:05,621 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 05:19:05,650 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/Problem19_label15.c[7551,7564] [2021-12-17 05:19:06,236 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 05:19:06,260 INFO L208 MainTranslator]: Completed translation [2021-12-17 05:19:06,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06 WrapperNode [2021-12-17 05:19:06,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 05:19:06,261 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 05:19:06,261 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 05:19:06,261 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 05:19:06,265 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:06,367 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:06,930 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-17 05:19:06,931 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 05:19:06,932 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 05:19:06,932 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 05:19:06,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 05:19:06,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:06,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,136 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,136 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,397 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,425 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,511 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,756 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 05:19:07,757 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 05:19:07,757 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 05:19:07,758 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 05:19:07,758 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (1/1) ... [2021-12-17 05:19:07,763 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 05:19:07,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:19:07,778 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 05:19:07,797 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 05:19:07,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 05:19:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 05:19:07,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 05:19:07,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 05:19:07,866 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 05:19:07,868 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 05:19:12,991 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 05:19:13,006 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 05:19:13,006 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 05:19:13,009 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:19:13 BoogieIcfgContainer [2021-12-17 05:19:13,009 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 05:19:13,010 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 05:19:13,010 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 05:19:13,012 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 05:19:13,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 05:19:04" (1/3) ... [2021-12-17 05:19:13,013 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bf0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:19:13, skipping insertion in model container [2021-12-17 05:19:13,013 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 05:19:06" (2/3) ... [2021-12-17 05:19:13,014 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bf0432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 05:19:13, skipping insertion in model container [2021-12-17 05:19:13,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 05:19:13" (3/3) ... [2021-12-17 05:19:13,015 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label15.c [2021-12-17 05:19:13,018 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 05:19:13,018 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 05:19:13,054 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 05:19:13,059 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 05:19:13,059 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 05:19:13,086 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 05:19:13,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-12-17 05:19:13,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:13,092 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:19:13,092 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:13,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:13,096 INFO L85 PathProgramCache]: Analyzing trace with hash -2074400678, now seen corresponding path program 1 times [2021-12-17 05:19:13,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:13,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729290110] [2021-12-17 05:19:13,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:13,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:13,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:13,253 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 05:19:13,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:13,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729290110] [2021-12-17 05:19:13,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729290110] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:13,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:13,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:19:13,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058246692] [2021-12-17 05:19:13,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:13,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:19:13,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:13,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:19:13,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:19:13,281 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 05:19:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:19,291 INFO L93 Difference]: Finished difference Result 4957 states and 9398 transitions. [2021-12-17 05:19:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:19:19,293 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 58 [2021-12-17 05:19:19,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:19,331 INFO L225 Difference]: With dead ends: 4957 [2021-12-17 05:19:19,331 INFO L226 Difference]: Without dead ends: 3129 [2021-12-17 05:19:19,338 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 05:19:19,354 INFO L933 BasicCegarLoop]: 1373 mSDtfsCounter, 1568 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 4344 mSolverCounterSat, 1517 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1568 SdHoareTripleChecker+Valid, 1595 SdHoareTripleChecker+Invalid, 5861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 4344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:19,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1568 Valid, 1595 Invalid, 5861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1517 Valid, 4344 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2021-12-17 05:19:19,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3129 states. [2021-12-17 05:19:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3129 to 3108. [2021-12-17 05:19:19,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 1.6012230447376892) internal successors, (4975), 3107 states have internal predecessors, (4975), 0 states have call successors, (0), 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 05:19:19,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 4975 transitions. [2021-12-17 05:19:19,479 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 4975 transitions. Word has length 58 [2021-12-17 05:19:19,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:19,480 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 4975 transitions. [2021-12-17 05:19:19,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 0 states have call successors, (0), 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 05:19:19,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 4975 transitions. [2021-12-17 05:19:19,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-12-17 05:19:19,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:19,485 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, 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] [2021-12-17 05:19:19,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 05:19:19,486 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:19,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:19,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1527059520, now seen corresponding path program 1 times [2021-12-17 05:19:19,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:19,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813932708] [2021-12-17 05:19:19,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:19,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:19:19,601 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813932708] [2021-12-17 05:19:19,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813932708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:19,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:19,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:19:19,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049581324] [2021-12-17 05:19:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:19,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:19:19,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:19,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:19:19,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:19:19,606 INFO L87 Difference]: Start difference. First operand 3108 states and 4975 transitions. Second operand has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:19:24,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:24,937 INFO L93 Difference]: Finished difference Result 9153 states and 14687 transitions. [2021-12-17 05:19:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:19:24,938 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 125 [2021-12-17 05:19:24,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:24,954 INFO L225 Difference]: With dead ends: 9153 [2021-12-17 05:19:24,954 INFO L226 Difference]: Without dead ends: 6047 [2021-12-17 05:19:24,961 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 05:19:24,962 INFO L933 BasicCegarLoop]: 1344 mSDtfsCounter, 1783 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 4197 mSolverCounterSat, 1430 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1783 SdHoareTripleChecker+Valid, 1618 SdHoareTripleChecker+Invalid, 5627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1430 IncrementalHoareTripleChecker+Valid, 4197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:24,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1783 Valid, 1618 Invalid, 5627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1430 Valid, 4197 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-17 05:19:24,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2021-12-17 05:19:25,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 6031. [2021-12-17 05:19:25,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6031 states, 6030 states have (on average 1.4029850746268657) internal successors, (8460), 6030 states have internal predecessors, (8460), 0 states have call successors, (0), 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 05:19:25,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6031 states to 6031 states and 8460 transitions. [2021-12-17 05:19:25,037 INFO L78 Accepts]: Start accepts. Automaton has 6031 states and 8460 transitions. Word has length 125 [2021-12-17 05:19:25,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:25,040 INFO L470 AbstractCegarLoop]: Abstraction has 6031 states and 8460 transitions. [2021-12-17 05:19:25,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.666666666666664) internal successors, (125), 2 states have internal predecessors, (125), 0 states have call successors, (0), 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 05:19:25,040 INFO L276 IsEmpty]: Start isEmpty. Operand 6031 states and 8460 transitions. [2021-12-17 05:19:25,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-17 05:19:25,044 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:25,044 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, 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 05:19:25,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 05:19:25,046 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:25,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:25,049 INFO L85 PathProgramCache]: Analyzing trace with hash 2012252692, now seen corresponding path program 1 times [2021-12-17 05:19:25,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:25,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590012472] [2021-12-17 05:19:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:25,051 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:25,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:25,149 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:19:25,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:25,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590012472] [2021-12-17 05:19:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590012472] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:25,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:25,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:19:25,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733517477] [2021-12-17 05:19:25,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:25,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:19:25,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:25,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:19:25,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:19:25,152 INFO L87 Difference]: Start difference. First operand 6031 states and 8460 transitions. Second operand has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 05:19:33,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:33,249 INFO L93 Difference]: Finished difference Result 19026 states and 26262 transitions. [2021-12-17 05:19:33,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:19:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-17 05:19:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:33,278 INFO L225 Difference]: With dead ends: 19026 [2021-12-17 05:19:33,279 INFO L226 Difference]: Without dead ends: 12997 [2021-12-17 05:19:33,284 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 05:19:33,285 INFO L933 BasicCegarLoop]: 938 mSDtfsCounter, 4260 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 9634 mSolverCounterSat, 1206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4260 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 10840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1206 IncrementalHoareTripleChecker+Valid, 9634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:33,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4260 Valid, 1207 Invalid, 10840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1206 Valid, 9634 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2021-12-17 05:19:33,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12997 states. [2021-12-17 05:19:33,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12997 to 12911. [2021-12-17 05:19:33,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.346243222308288) internal successors, (17380), 12910 states have internal predecessors, (17380), 0 states have call successors, (0), 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 05:19:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17380 transitions. [2021-12-17 05:19:33,476 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17380 transitions. Word has length 127 [2021-12-17 05:19:33,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:33,478 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17380 transitions. [2021-12-17 05:19:33,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.75) internal successors, (127), 3 states have internal predecessors, (127), 0 states have call successors, (0), 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 05:19:33,479 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17380 transitions. [2021-12-17 05:19:33,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-12-17 05:19:33,486 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:33,486 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, 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, 1, 1, 1, 1, 1, 1, 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 05:19:33,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 05:19:33,487 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:33,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:33,487 INFO L85 PathProgramCache]: Analyzing trace with hash -1127483941, now seen corresponding path program 1 times [2021-12-17 05:19:33,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:33,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238305672] [2021-12-17 05:19:33,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:33,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:33,770 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 147 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-17 05:19:33,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:33,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238305672] [2021-12-17 05:19:33,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238305672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:33,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:33,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:19:33,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817645230] [2021-12-17 05:19:33,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:33,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:19:33,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:33,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:19:33,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:19:33,774 INFO L87 Difference]: Start difference. First operand 12911 states and 17380 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:19:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:38,721 INFO L93 Difference]: Finished difference Result 24486 states and 33412 transitions. [2021-12-17 05:19:38,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:19:38,722 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 362 [2021-12-17 05:19:38,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:38,746 INFO L225 Difference]: With dead ends: 24486 [2021-12-17 05:19:38,746 INFO L226 Difference]: Without dead ends: 12911 [2021-12-17 05:19:38,758 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 05:19:38,759 INFO L933 BasicCegarLoop]: 1771 mSDtfsCounter, 1153 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5716 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1153 SdHoareTripleChecker+Valid, 1950 SdHoareTripleChecker+Invalid, 5724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:38,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1153 Valid, 1950 Invalid, 5724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5716 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 05:19:38,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12911 states. [2021-12-17 05:19:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12911 to 12911. [2021-12-17 05:19:38,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12911 states, 12910 states have (on average 1.3455460883036405) internal successors, (17371), 12910 states have internal predecessors, (17371), 0 states have call successors, (0), 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 05:19:38,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12911 states to 12911 states and 17371 transitions. [2021-12-17 05:19:38,950 INFO L78 Accepts]: Start accepts. Automaton has 12911 states and 17371 transitions. Word has length 362 [2021-12-17 05:19:38,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:38,951 INFO L470 AbstractCegarLoop]: Abstraction has 12911 states and 17371 transitions. [2021-12-17 05:19:38,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 05:19:38,951 INFO L276 IsEmpty]: Start isEmpty. Operand 12911 states and 17371 transitions. [2021-12-17 05:19:38,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 537 [2021-12-17 05:19:38,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:38,957 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:19:38,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 05:19:38,957 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:38,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:38,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1930531076, now seen corresponding path program 1 times [2021-12-17 05:19:38,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:38,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610899084] [2021-12-17 05:19:38,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:38,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:19:39,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:39,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610899084] [2021-12-17 05:19:39,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610899084] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:39,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:39,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:19:39,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211229663] [2021-12-17 05:19:39,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:19:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:39,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:19:39,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:19:39,266 INFO L87 Difference]: Start difference. First operand 12911 states and 17371 transitions. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 05:19:44,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:44,379 INFO L93 Difference]: Finished difference Result 32779 states and 43803 transitions. [2021-12-17 05:19:44,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:19:44,380 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 536 [2021-12-17 05:19:44,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:44,429 INFO L225 Difference]: With dead ends: 32779 [2021-12-17 05:19:44,429 INFO L226 Difference]: Without dead ends: 19870 [2021-12-17 05:19:44,443 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:19:44,447 INFO L933 BasicCegarLoop]: 1974 mSDtfsCounter, 1673 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4173 mSolverCounterSat, 2313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1673 SdHoareTripleChecker+Valid, 2066 SdHoareTripleChecker+Invalid, 6486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2313 IncrementalHoareTripleChecker+Valid, 4173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:44,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1673 Valid, 2066 Invalid, 6486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2313 Valid, 4173 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2021-12-17 05:19:44,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19870 states. [2021-12-17 05:19:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19870 to 19785. [2021-12-17 05:19:44,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19785 states, 19784 states have (on average 1.3045390214314598) internal successors, (25809), 19784 states have internal predecessors, (25809), 0 states have call successors, (0), 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 05:19:44,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19785 states to 19785 states and 25809 transitions. [2021-12-17 05:19:44,680 INFO L78 Accepts]: Start accepts. Automaton has 19785 states and 25809 transitions. Word has length 536 [2021-12-17 05:19:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:44,681 INFO L470 AbstractCegarLoop]: Abstraction has 19785 states and 25809 transitions. [2021-12-17 05:19:44,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 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 05:19:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 19785 states and 25809 transitions. [2021-12-17 05:19:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 615 [2021-12-17 05:19:44,691 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:44,691 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:19:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 05:19:44,691 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1532179264, now seen corresponding path program 1 times [2021-12-17 05:19:44,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:44,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33658639] [2021-12-17 05:19:44,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:44,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:44,942 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 133 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:19:44,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:44,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33658639] [2021-12-17 05:19:44,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33658639] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:19:44,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317923496] [2021-12-17 05:19:44,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:44,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:19:44,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:19:44,971 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 05:19:45,003 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 05:19:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:45,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:19:45,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:19:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 177 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 05:19:45,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:19:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317923496] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:45,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:19:45,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:19:45,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17091958] [2021-12-17 05:19:45,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:45,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:19:45,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:45,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:19:45,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:19:45,966 INFO L87 Difference]: Start difference. First operand 19785 states and 25809 transitions. Second operand has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 05:19:51,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:51,666 INFO L93 Difference]: Finished difference Result 53220 states and 71052 transitions. [2021-12-17 05:19:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:19:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 614 [2021-12-17 05:19:51,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:51,715 INFO L225 Difference]: With dead ends: 53220 [2021-12-17 05:19:51,716 INFO L226 Difference]: Without dead ends: 36167 [2021-12-17 05:19:51,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 617 GetRequests, 613 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:19:51,738 INFO L933 BasicCegarLoop]: 705 mSDtfsCounter, 2530 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2530 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 5525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:51,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2530 Valid, 815 Invalid, 5525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 05:19:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36167 states. [2021-12-17 05:19:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36167 to 34798. [2021-12-17 05:19:52,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34798 states, 34797 states have (on average 1.2889904302095008) internal successors, (44853), 34797 states have internal predecessors, (44853), 0 states have call successors, (0), 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 05:19:52,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34798 states to 34798 states and 44853 transitions. [2021-12-17 05:19:52,336 INFO L78 Accepts]: Start accepts. Automaton has 34798 states and 44853 transitions. Word has length 614 [2021-12-17 05:19:52,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:52,337 INFO L470 AbstractCegarLoop]: Abstraction has 34798 states and 44853 transitions. [2021-12-17 05:19:52,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.66666666666666) internal successors, (614), 3 states have internal predecessors, (614), 0 states have call successors, (0), 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 05:19:52,337 INFO L276 IsEmpty]: Start isEmpty. Operand 34798 states and 44853 transitions. [2021-12-17 05:19:52,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 631 [2021-12-17 05:19:52,345 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:52,345 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:19:52,370 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 05:19:52,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-17 05:19:52,562 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:52,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:52,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1910050359, now seen corresponding path program 1 times [2021-12-17 05:19:52,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:52,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200809461] [2021-12-17 05:19:52,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:52,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:19:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 111 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-12-17 05:19:52,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:19:52,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200809461] [2021-12-17 05:19:52,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200809461] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:19:52,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:19:52,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 05:19:52,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352286600] [2021-12-17 05:19:52,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:19:52,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:19:52,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:19:52,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:19:52,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:19:52,738 INFO L87 Difference]: Start difference. First operand 34798 states and 44853 transitions. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 05:19:58,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:19:58,506 INFO L93 Difference]: Finished difference Result 91446 states and 120422 transitions. [2021-12-17 05:19:58,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:19:58,507 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 630 [2021-12-17 05:19:58,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:19:58,570 INFO L225 Difference]: With dead ends: 91446 [2021-12-17 05:19:58,570 INFO L226 Difference]: Without dead ends: 59380 [2021-12-17 05:19:58,586 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 05:19:58,588 INFO L933 BasicCegarLoop]: 683 mSDtfsCounter, 1390 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 2340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1390 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 6269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2340 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-17 05:19:58,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1390 Valid, 729 Invalid, 6269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2340 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-17 05:19:58,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59380 states. [2021-12-17 05:19:59,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59380 to 59370. [2021-12-17 05:19:59,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59370 states, 59369 states have (on average 1.2826390877393925) internal successors, (76149), 59369 states have internal predecessors, (76149), 0 states have call successors, (0), 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 05:19:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59370 states to 59370 states and 76149 transitions. [2021-12-17 05:19:59,450 INFO L78 Accepts]: Start accepts. Automaton has 59370 states and 76149 transitions. Word has length 630 [2021-12-17 05:19:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:19:59,451 INFO L470 AbstractCegarLoop]: Abstraction has 59370 states and 76149 transitions. [2021-12-17 05:19:59,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 2 states have internal predecessors, (538), 0 states have call successors, (0), 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 05:19:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 59370 states and 76149 transitions. [2021-12-17 05:19:59,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-12-17 05:19:59,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:19:59,478 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:19:59,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 05:19:59,478 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:19:59,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:19:59,479 INFO L85 PathProgramCache]: Analyzing trace with hash 283919601, now seen corresponding path program 1 times [2021-12-17 05:19:59,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:19:59,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339068633] [2021-12-17 05:19:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:19:59,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:19:59,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:00,135 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 113 proven. 54 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 05:20:00,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339068633] [2021-12-17 05:20:00,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339068633] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:20:00,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136709232] [2021-12-17 05:20:00,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:00,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:20:00,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:20:00,140 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 05:20:00,175 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 05:20:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 994 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:20:00,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:20:01,323 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 167 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-17 05:20:01,323 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:20:01,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136709232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:01,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:20:01,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-17 05:20:01,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7578102] [2021-12-17 05:20:01,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:01,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:20:01,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:20:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:20:01,325 INFO L87 Difference]: Start difference. First operand 59370 states and 76149 transitions. Second operand has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 05:20:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:06,540 INFO L93 Difference]: Finished difference Result 139238 states and 183874 transitions. [2021-12-17 05:20:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:20:06,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 851 [2021-12-17 05:20:06,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:06,655 INFO L225 Difference]: With dead ends: 139238 [2021-12-17 05:20:06,655 INFO L226 Difference]: Without dead ends: 82600 [2021-12-17 05:20:06,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 854 GetRequests, 850 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:20:06,691 INFO L933 BasicCegarLoop]: 1691 mSDtfsCounter, 1401 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 1658 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1401 SdHoareTripleChecker+Valid, 1885 SdHoareTripleChecker+Invalid, 5747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1658 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:06,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1401 Valid, 1885 Invalid, 5747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1658 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2021-12-17 05:20:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82600 states. [2021-12-17 05:20:07,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82600 to 59306. [2021-12-17 05:20:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59306 states, 59305 states have (on average 1.2823370710732653) internal successors, (76049), 59305 states have internal predecessors, (76049), 0 states have call successors, (0), 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 05:20:07,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59306 states to 59306 states and 76049 transitions. [2021-12-17 05:20:07,614 INFO L78 Accepts]: Start accepts. Automaton has 59306 states and 76049 transitions. Word has length 851 [2021-12-17 05:20:07,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:07,614 INFO L470 AbstractCegarLoop]: Abstraction has 59306 states and 76049 transitions. [2021-12-17 05:20:07,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.33333333333334) internal successors, (550), 3 states have internal predecessors, (550), 0 states have call successors, (0), 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 05:20:07,615 INFO L276 IsEmpty]: Start isEmpty. Operand 59306 states and 76049 transitions. [2021-12-17 05:20:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 919 [2021-12-17 05:20:07,623 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:07,624 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:07,641 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 05:20:07,839 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 05:20:07,840 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:07,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:07,840 INFO L85 PathProgramCache]: Analyzing trace with hash -683398199, now seen corresponding path program 1 times [2021-12-17 05:20:07,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:07,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652872671] [2021-12-17 05:20:07,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:07,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:08,280 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 223 proven. 0 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-12-17 05:20:08,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:08,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652872671] [2021-12-17 05:20:08,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652872671] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:08,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:20:08,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:20:08,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031813645] [2021-12-17 05:20:08,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:08,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:20:08,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:08,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:20:08,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:20:08,283 INFO L87 Difference]: Start difference. First operand 59306 states and 76049 transitions. Second operand has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 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 05:20:16,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:16,236 INFO L93 Difference]: Finished difference Result 155484 states and 207764 transitions. [2021-12-17 05:20:16,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:20:16,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 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 918 [2021-12-17 05:20:16,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:16,372 INFO L225 Difference]: With dead ends: 155484 [2021-12-17 05:20:16,372 INFO L226 Difference]: Without dead ends: 98910 [2021-12-17 05:20:16,410 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 05:20:16,412 INFO L933 BasicCegarLoop]: 2880 mSDtfsCounter, 4268 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 6940 mSolverCounterSat, 1483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4268 SdHoareTripleChecker+Valid, 3127 SdHoareTripleChecker+Invalid, 8423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1483 IncrementalHoareTripleChecker+Valid, 6940 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:16,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4268 Valid, 3127 Invalid, 8423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1483 Valid, 6940 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-12-17 05:20:16,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98910 states. [2021-12-17 05:20:17,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98910 to 86621. [2021-12-17 05:20:17,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86621 states, 86620 states have (on average 1.2856845993996768) internal successors, (111366), 86620 states have internal predecessors, (111366), 0 states have call successors, (0), 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 05:20:17,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86621 states to 86621 states and 111366 transitions. [2021-12-17 05:20:17,527 INFO L78 Accepts]: Start accepts. Automaton has 86621 states and 111366 transitions. Word has length 918 [2021-12-17 05:20:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:17,528 INFO L470 AbstractCegarLoop]: Abstraction has 86621 states and 111366 transitions. [2021-12-17 05:20:17,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 138.25) internal successors, (553), 4 states have internal predecessors, (553), 0 states have call successors, (0), 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 05:20:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 86621 states and 111366 transitions. [2021-12-17 05:20:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2021-12-17 05:20:17,539 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:17,540 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:17,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 05:20:17,540 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:17,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:17,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1008288959, now seen corresponding path program 1 times [2021-12-17 05:20:17,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:17,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109870213] [2021-12-17 05:20:17,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:17,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:17,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 837 backedges. 572 proven. 0 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-12-17 05:20:17,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:17,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109870213] [2021-12-17 05:20:17,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109870213] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:17,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:20:17,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 05:20:17,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784637984] [2021-12-17 05:20:17,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:17,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 05:20:17,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:17,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 05:20:17,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 05:20:17,794 INFO L87 Difference]: Start difference. First operand 86621 states and 111366 transitions. Second operand has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 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 05:20:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:27,459 INFO L93 Difference]: Finished difference Result 260735 states and 338379 transitions. [2021-12-17 05:20:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 05:20:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 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 923 [2021-12-17 05:20:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:27,731 INFO L225 Difference]: With dead ends: 260735 [2021-12-17 05:20:27,731 INFO L226 Difference]: Without dead ends: 176846 [2021-12-17 05:20:27,795 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 05:20:27,796 INFO L933 BasicCegarLoop]: 948 mSDtfsCounter, 3252 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 9111 mSolverCounterSat, 2609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3252 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 11720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2609 IncrementalHoareTripleChecker+Valid, 9111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:27,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3252 Valid, 1278 Invalid, 11720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2609 Valid, 9111 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-12-17 05:20:27,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176846 states. [2021-12-17 05:20:29,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176846 to 165839. [2021-12-17 05:20:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165839 states, 165838 states have (on average 1.261327319432217) internal successors, (209176), 165838 states have internal predecessors, (209176), 0 states have call successors, (0), 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 05:20:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165839 states to 165839 states and 209176 transitions. [2021-12-17 05:20:30,093 INFO L78 Accepts]: Start accepts. Automaton has 165839 states and 209176 transitions. Word has length 923 [2021-12-17 05:20:30,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:30,094 INFO L470 AbstractCegarLoop]: Abstraction has 165839 states and 209176 transitions. [2021-12-17 05:20:30,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.0) internal successors, (660), 4 states have internal predecessors, (660), 0 states have call successors, (0), 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 05:20:30,094 INFO L276 IsEmpty]: Start isEmpty. Operand 165839 states and 209176 transitions. [2021-12-17 05:20:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1024 [2021-12-17 05:20:30,117 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:30,117 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:30,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 05:20:30,118 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 163727669, now seen corresponding path program 1 times [2021-12-17 05:20:30,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151807349] [2021-12-17 05:20:30,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:30,119 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 962 backedges. 601 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-12-17 05:20:30,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:30,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151807349] [2021-12-17 05:20:30,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151807349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:30,537 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:20:30,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:20:30,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158286968] [2021-12-17 05:20:30,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:30,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:20:30,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:30,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:20:30,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:20:30,540 INFO L87 Difference]: Start difference. First operand 165839 states and 209176 transitions. Second operand has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 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 05:20:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:36,410 INFO L93 Difference]: Finished difference Result 324855 states and 410797 transitions. [2021-12-17 05:20:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:20:36,411 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 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 1023 [2021-12-17 05:20:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:36,635 INFO L225 Difference]: With dead ends: 324855 [2021-12-17 05:20:36,635 INFO L226 Difference]: Without dead ends: 161748 [2021-12-17 05:20:36,703 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 05:20:36,703 INFO L933 BasicCegarLoop]: 2848 mSDtfsCounter, 1343 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 4405 mSolverCounterSat, 1086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3035 SdHoareTripleChecker+Invalid, 5491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1086 IncrementalHoareTripleChecker+Valid, 4405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:36,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3035 Invalid, 5491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1086 Valid, 4405 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 05:20:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161748 states. [2021-12-17 05:20:38,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161748 to 141265. [2021-12-17 05:20:38,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141265 states, 141264 states have (on average 1.1862045531770302) internal successors, (167568), 141264 states have internal predecessors, (167568), 0 states have call successors, (0), 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 05:20:38,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141265 states to 141265 states and 167568 transitions. [2021-12-17 05:20:38,498 INFO L78 Accepts]: Start accepts. Automaton has 141265 states and 167568 transitions. Word has length 1023 [2021-12-17 05:20:38,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:38,499 INFO L470 AbstractCegarLoop]: Abstraction has 141265 states and 167568 transitions. [2021-12-17 05:20:38,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 221.33333333333334) internal successors, (664), 3 states have internal predecessors, (664), 0 states have call successors, (0), 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 05:20:38,500 INFO L276 IsEmpty]: Start isEmpty. Operand 141265 states and 167568 transitions. [2021-12-17 05:20:38,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1090 [2021-12-17 05:20:38,759 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:38,769 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, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:38,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 05:20:38,770 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:38,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:38,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1424840617, now seen corresponding path program 1 times [2021-12-17 05:20:38,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:38,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553627354] [2021-12-17 05:20:38,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:38,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 904 proven. 455 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-17 05:20:39,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553627354] [2021-12-17 05:20:39,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553627354] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:20:39,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057325349] [2021-12-17 05:20:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:39,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:20:39,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:20:39,200 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 05:20:39,200 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 05:20:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:39,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:20:39,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:20:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 335 proven. 0 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2021-12-17 05:20:40,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:20:40,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057325349] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:40,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:20:40,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-12-17 05:20:40,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056982511] [2021-12-17 05:20:40,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:40,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:20:40,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:20:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:20:40,794 INFO L87 Difference]: Start difference. First operand 141265 states and 167568 transitions. Second operand has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 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 05:20:46,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:46,469 INFO L93 Difference]: Finished difference Result 319387 states and 384646 transitions. [2021-12-17 05:20:46,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:20:46,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 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 1089 [2021-12-17 05:20:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:46,882 INFO L225 Difference]: With dead ends: 319387 [2021-12-17 05:20:46,882 INFO L226 Difference]: Without dead ends: 180854 [2021-12-17 05:20:46,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1089 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-17 05:20:46,938 INFO L933 BasicCegarLoop]: 2350 mSDtfsCounter, 1526 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 4863 mSolverCounterSat, 972 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1526 SdHoareTripleChecker+Valid, 2550 SdHoareTripleChecker+Invalid, 5835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 972 IncrementalHoareTripleChecker+Valid, 4863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:46,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1526 Valid, 2550 Invalid, 5835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [972 Valid, 4863 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-12-17 05:20:47,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180854 states. [2021-12-17 05:20:48,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180854 to 167203. [2021-12-17 05:20:48,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167203 states, 167202 states have (on average 1.1890049162091363) internal successors, (198804), 167202 states have internal predecessors, (198804), 0 states have call successors, (0), 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 05:20:49,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167203 states to 167203 states and 198804 transitions. [2021-12-17 05:20:49,317 INFO L78 Accepts]: Start accepts. Automaton has 167203 states and 198804 transitions. Word has length 1089 [2021-12-17 05:20:49,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:49,317 INFO L470 AbstractCegarLoop]: Abstraction has 167203 states and 198804 transitions. [2021-12-17 05:20:49,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 185.66666666666666) internal successors, (557), 3 states have internal predecessors, (557), 0 states have call successors, (0), 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 05:20:49,318 INFO L276 IsEmpty]: Start isEmpty. Operand 167203 states and 198804 transitions. [2021-12-17 05:20:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1276 [2021-12-17 05:20:49,351 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:49,366 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:49,385 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 05:20:49,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:20:49,583 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:49,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1078828059, now seen corresponding path program 1 times [2021-12-17 05:20:49,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:49,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101212105] [2021-12-17 05:20:49,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:49,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:50,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1563 backedges. 1202 proven. 0 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2021-12-17 05:20:50,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:50,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101212105] [2021-12-17 05:20:50,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101212105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:50,068 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:20:50,068 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:20:50,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298606657] [2021-12-17 05:20:50,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:50,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:20:50,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:50,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:20:50,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:20:50,071 INFO L87 Difference]: Start difference. First operand 167203 states and 198804 transitions. Second operand has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 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 05:20:54,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:20:54,895 INFO L93 Difference]: Finished difference Result 331678 states and 394879 transitions. [2021-12-17 05:20:54,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:20:54,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 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 1275 [2021-12-17 05:20:54,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:20:55,127 INFO L225 Difference]: With dead ends: 331678 [2021-12-17 05:20:55,128 INFO L226 Difference]: Without dead ends: 167207 [2021-12-17 05:20:55,209 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 05:20:55,209 INFO L933 BasicCegarLoop]: 2848 mSDtfsCounter, 1261 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 4401 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 3034 SdHoareTripleChecker+Invalid, 4494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2021-12-17 05:20:55,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 3034 Invalid, 4494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4401 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2021-12-17 05:20:55,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167207 states. [2021-12-17 05:20:57,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167207 to 167201. [2021-12-17 05:20:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167201 states, 167200 states have (on average 1.1889952153110048) internal successors, (198800), 167200 states have internal predecessors, (198800), 0 states have call successors, (0), 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 05:20:57,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167201 states to 167201 states and 198800 transitions. [2021-12-17 05:20:57,588 INFO L78 Accepts]: Start accepts. Automaton has 167201 states and 198800 transitions. Word has length 1275 [2021-12-17 05:20:57,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:20:57,589 INFO L470 AbstractCegarLoop]: Abstraction has 167201 states and 198800 transitions. [2021-12-17 05:20:57,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 305.3333333333333) internal successors, (916), 3 states have internal predecessors, (916), 0 states have call successors, (0), 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 05:20:57,589 INFO L276 IsEmpty]: Start isEmpty. Operand 167201 states and 198800 transitions. [2021-12-17 05:20:57,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1489 [2021-12-17 05:20:57,639 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:20:57,640 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, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:20:57,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 05:20:57,640 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:20:57,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:20:57,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1126727830, now seen corresponding path program 1 times [2021-12-17 05:20:57,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:20:57,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254964558] [2021-12-17 05:20:57,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:20:57,641 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:20:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:20:58,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2444 backedges. 1834 proven. 0 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-12-17 05:20:58,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:20:58,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254964558] [2021-12-17 05:20:58,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254964558] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:20:58,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 05:20:58,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 05:20:58,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845814414] [2021-12-17 05:20:58,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:20:58,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:20:58,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:20:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:20:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 05:20:58,298 INFO L87 Difference]: Start difference. First operand 167201 states and 198800 transitions. Second operand has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 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 05:21:04,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:21:04,474 INFO L93 Difference]: Finished difference Result 386360 states and 459276 transitions. [2021-12-17 05:21:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:21:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 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 1488 [2021-12-17 05:21:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:21:04,740 INFO L225 Difference]: With dead ends: 386360 [2021-12-17 05:21:04,741 INFO L226 Difference]: Without dead ends: 221891 [2021-12-17 05:21:04,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 05:21:04,786 INFO L933 BasicCegarLoop]: 570 mSDtfsCounter, 1543 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 4232 mSolverCounterSat, 2083 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1543 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 6315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2083 IncrementalHoareTripleChecker+Valid, 4232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-17 05:21:04,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1543 Valid, 621 Invalid, 6315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2083 Valid, 4232 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-17 05:21:04,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221891 states. [2021-12-17 05:21:07,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221891 to 209514. [2021-12-17 05:21:07,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209514 states, 209513 states have (on average 1.1868810049973033) internal successors, (248667), 209513 states have internal predecessors, (248667), 0 states have call successors, (0), 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 05:21:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209514 states to 209514 states and 248667 transitions. [2021-12-17 05:21:07,543 INFO L78 Accepts]: Start accepts. Automaton has 209514 states and 248667 transitions. Word has length 1488 [2021-12-17 05:21:07,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 05:21:07,544 INFO L470 AbstractCegarLoop]: Abstraction has 209514 states and 248667 transitions. [2021-12-17 05:21:07,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 312.3333333333333) internal successors, (937), 3 states have internal predecessors, (937), 0 states have call successors, (0), 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 05:21:07,544 INFO L276 IsEmpty]: Start isEmpty. Operand 209514 states and 248667 transitions. [2021-12-17 05:21:07,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1596 [2021-12-17 05:21:07,668 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 05:21:07,669 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, 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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 05:21:07,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 05:21:07,669 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 05:21:07,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 05:21:07,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1461047049, now seen corresponding path program 1 times [2021-12-17 05:21:07,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 05:21:07,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917229660] [2021-12-17 05:21:07,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:21:07,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 05:21:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:21:08,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 992 proven. 476 refuted. 0 times theorem prover too weak. 305 trivial. 0 not checked. [2021-12-17 05:21:08,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 05:21:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917229660] [2021-12-17 05:21:08,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917229660] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 05:21:08,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299614338] [2021-12-17 05:21:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 05:21:08,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 05:21:08,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 05:21:08,709 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 05:21:08,732 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 05:21:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 05:21:09,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 1783 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 05:21:09,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 05:21:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 1241 proven. 0 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2021-12-17 05:21:10,888 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 05:21:10,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299614338] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 05:21:10,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 05:21:10,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 05:21:10,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748498493] [2021-12-17 05:21:10,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 05:21:10,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 05:21:10,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 05:21:10,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 05:21:10,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:21:10,891 INFO L87 Difference]: Start difference. First operand 209514 states and 248667 transitions. Second operand has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 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 05:21:16,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 05:21:16,327 INFO L93 Difference]: Finished difference Result 515943 states and 619012 transitions. [2021-12-17 05:21:16,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 05:21:16,328 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 355.0) internal successors, (1065), 3 states have internal predecessors, (1065), 0 states have call successors, (0), 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 1595 [2021-12-17 05:21:16,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 05:21:16,720 INFO L225 Difference]: With dead ends: 515943 [2021-12-17 05:21:16,720 INFO L226 Difference]: Without dead ends: 309161 [2021-12-17 05:21:16,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1599 GetRequests, 1594 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 05:21:16,778 INFO L933 BasicCegarLoop]: 3014 mSDtfsCounter, 1290 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 3702 mSolverCounterSat, 1645 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1290 SdHoareTripleChecker+Valid, 3188 SdHoareTripleChecker+Invalid, 5347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1645 IncrementalHoareTripleChecker+Valid, 3702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-12-17 05:21:16,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1290 Valid, 3188 Invalid, 5347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1645 Valid, 3702 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2021-12-17 05:21:17,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309161 states.