./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem15_label12.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem15_label12.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 a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:27:36,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:27:36,380 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:27:36,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:27:36,415 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:27:36,418 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:27:36,420 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:27:36,422 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:27:36,424 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:27:36,428 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:27:36,429 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:27:36,430 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:27:36,430 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:27:36,433 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:27:36,434 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:27:36,437 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:27:36,438 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:27:36,439 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:27:36,441 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:27:36,446 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:27:36,447 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:27:36,448 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:27:36,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:27:36,450 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:27:36,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:27:36,456 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:27:36,457 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:27:36,458 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:27:36,459 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:27:36,459 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:27:36,460 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:27:36,460 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:27:36,462 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:27:36,463 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:27:36,464 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:27:36,464 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:27:36,464 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:27:36,465 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:27:36,465 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:27:36,466 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:27:36,467 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:27:36,468 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:27:36,501 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:27:36,501 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:27:36,502 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:27:36,502 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:27:36,503 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:27:36,503 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:27:36,503 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:27:36,503 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:27:36,504 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:27:36,504 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:27:36,505 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:27:36,505 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:27:36,505 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:27:36,505 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:27:36,506 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:27:36,506 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:27:36,506 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:27:36,506 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:27:36,507 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:27:36,507 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:27:36,507 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:27:36,507 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:27:36,508 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:27:36,508 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:27:36,508 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:36,508 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:27:36,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:27:36,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:27:36,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:27:36,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:27:36,509 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:27:36,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:27:36,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:27:36,510 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:27:36,510 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6e4197d0572096f9d487e671de9ba1541e800c13a9d5ac01008d7630fe3cd68 [2021-12-22 09:27:36,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:27:36,799 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:27:36,801 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:27:36,802 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:27:36,803 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:27:36,804 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2021-12-22 09:27:36,862 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d200098b9/9e423b3409164d16aebe5247c40f3dff/FLAG070c668a0 [2021-12-22 09:27:37,395 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:27:37,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem15_label12.c [2021-12-22 09:27:37,414 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d200098b9/9e423b3409164d16aebe5247c40f3dff/FLAG070c668a0 [2021-12-22 09:27:37,861 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d200098b9/9e423b3409164d16aebe5247c40f3dff [2021-12-22 09:27:37,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:27:37,863 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:27:37,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:37,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:27:37,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:27:37,868 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:37" (1/1) ... [2021-12-22 09:27:37,869 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1425d7b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:37, skipping insertion in model container [2021-12-22 09:27:37,869 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:27:37" (1/1) ... [2021-12-22 09:27:37,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:27:37,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:27:38,075 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/Problem15_label12.c[7168,7181] [2021-12-22 09:27:38,414 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:38,428 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:27:38,462 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/Problem15_label12.c[7168,7181] [2021-12-22 09:27:38,622 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:27:38,636 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:27:38,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38 WrapperNode [2021-12-22 09:27:38,637 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:27:38,638 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:38,638 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:27:38,638 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:27:38,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,683 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,830 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 1758 [2021-12-22 09:27:38,830 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:27:38,831 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:27:38,832 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:27:38,832 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:27:38,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,839 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,858 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,858 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,937 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,969 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:38,996 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:27:38,997 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:27:38,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:27:38,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:27:38,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (1/1) ... [2021-12-22 09:27:39,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:27:39,053 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:39,076 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) [2021-12-22 09:27:39,088 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 [2021-12-22 09:27:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:27:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:27:39,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:27:39,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:27:39,206 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:27:39,207 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:27:41,614 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:27:41,631 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:27:41,632 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:27:41,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:41 BoogieIcfgContainer [2021-12-22 09:27:41,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:27:41,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:27:41,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:27:41,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:27:41,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:27:37" (1/3) ... [2021-12-22 09:27:41,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485f23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:41, skipping insertion in model container [2021-12-22 09:27:41,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:27:38" (2/3) ... [2021-12-22 09:27:41,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@485f23d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:27:41, skipping insertion in model container [2021-12-22 09:27:41,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:27:41" (3/3) ... [2021-12-22 09:27:41,641 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem15_label12.c [2021-12-22 09:27:41,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:27:41,646 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:27:41,696 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:27:41,704 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 [2021-12-22 09:27:41,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:27:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:41,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-22 09:27:41,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:41,749 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, 1] [2021-12-22 09:27:41,750 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:41,755 INFO L85 PathProgramCache]: Analyzing trace with hash 118092897, now seen corresponding path program 1 times [2021-12-22 09:27:41,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:41,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636065212] [2021-12-22 09:27:41,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:41,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:41,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:42,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:42,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636065212] [2021-12-22 09:27:42,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636065212] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:42,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:42,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:42,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379003567] [2021-12-22 09:27:42,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:42,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:42,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:42,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:42,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:42,082 INFO L87 Difference]: Start difference. First operand has 424 states, 422 states have (on average 1.7772511848341233) internal successors, (750), 423 states have internal predecessors, (750), 0 states have call successors, (0), 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 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:44,169 INFO L93 Difference]: Finished difference Result 1154 states and 2106 transitions. [2021-12-22 09:27:44,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:44,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 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 59 [2021-12-22 09:27:44,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:44,185 INFO L225 Difference]: With dead ends: 1154 [2021-12-22 09:27:44,185 INFO L226 Difference]: Without dead ends: 665 [2021-12-22 09:27:44,190 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 [2021-12-22 09:27:44,192 INFO L933 BasicCegarLoop]: 334 mSDtfsCounter, 262 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 976 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 976 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:44,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 383 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 976 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-12-22 09:27:44,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-12-22 09:27:44,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 663. [2021-12-22 09:27:44,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 663 states, 662 states have (on average 1.4818731117824773) internal successors, (981), 662 states have internal predecessors, (981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663 states to 663 states and 981 transitions. [2021-12-22 09:27:44,254 INFO L78 Accepts]: Start accepts. Automaton has 663 states and 981 transitions. Word has length 59 [2021-12-22 09:27:44,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:44,254 INFO L470 AbstractCegarLoop]: Abstraction has 663 states and 981 transitions. [2021-12-22 09:27:44,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 2 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:44,255 INFO L276 IsEmpty]: Start isEmpty. Operand 663 states and 981 transitions. [2021-12-22 09:27:44,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-12-22 09:27:44,258 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:44,259 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:44,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:27:44,259 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:44,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:44,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1794665063, now seen corresponding path program 1 times [2021-12-22 09:27:44,260 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:44,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179193812] [2021-12-22 09:27:44,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:44,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:44,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:44,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179193812] [2021-12-22 09:27:44,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179193812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:44,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:44,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:44,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623544779] [2021-12-22 09:27:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:44,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:44,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:44,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:44,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:44,459 INFO L87 Difference]: Start difference. First operand 663 states and 981 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:45,878 INFO L93 Difference]: Finished difference Result 1624 states and 2315 transitions. [2021-12-22 09:27:45,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 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 124 [2021-12-22 09:27:45,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:45,883 INFO L225 Difference]: With dead ends: 1624 [2021-12-22 09:27:45,883 INFO L226 Difference]: Without dead ends: 963 [2021-12-22 09:27:45,886 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 [2021-12-22 09:27:45,891 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 237 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:45,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 337 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:27:45,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-12-22 09:27:45,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 963. [2021-12-22 09:27:45,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 962 states have (on average 1.362785862785863) internal successors, (1311), 962 states have internal predecessors, (1311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1311 transitions. [2021-12-22 09:27:45,947 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1311 transitions. Word has length 124 [2021-12-22 09:27:45,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:45,950 INFO L470 AbstractCegarLoop]: Abstraction has 963 states and 1311 transitions. [2021-12-22 09:27:45,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 2 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:45,950 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1311 transitions. [2021-12-22 09:27:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-22 09:27:45,960 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:45,961 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, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:45,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:27:45,962 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:45,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:45,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1505786198, now seen corresponding path program 1 times [2021-12-22 09:27:45,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:45,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372502781] [2021-12-22 09:27:45,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:45,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:46,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:46,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:46,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372502781] [2021-12-22 09:27:46,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372502781] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:46,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:46,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:27:46,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840633383] [2021-12-22 09:27:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:46,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 09:27:46,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:46,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 09:27:46,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:27:46,134 INFO L87 Difference]: Start difference. First operand 963 states and 1311 transitions. Second operand has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:48,099 INFO L93 Difference]: Finished difference Result 2244 states and 3201 transitions. [2021-12-22 09:27:48,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:27:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 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 129 [2021-12-22 09:27:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:48,106 INFO L225 Difference]: With dead ends: 2244 [2021-12-22 09:27:48,106 INFO L226 Difference]: Without dead ends: 1582 [2021-12-22 09:27:48,108 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 [2021-12-22 09:27:48,109 INFO L933 BasicCegarLoop]: 268 mSDtfsCounter, 362 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1663 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 2146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 1663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:48,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 365 Invalid, 2146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 1663 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-22 09:27:48,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-12-22 09:27:48,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1266. [2021-12-22 09:27:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 1.3043478260869565) internal successors, (1650), 1265 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1650 transitions. [2021-12-22 09:27:48,137 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1650 transitions. Word has length 129 [2021-12-22 09:27:48,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:48,138 INFO L470 AbstractCegarLoop]: Abstraction has 1266 states and 1650 transitions. [2021-12-22 09:27:48,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.8) internal successors, (129), 4 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:48,138 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1650 transitions. [2021-12-22 09:27:48,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-22 09:27:48,142 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:48,142 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:48,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:27:48,142 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:48,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:48,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1334591182, now seen corresponding path program 1 times [2021-12-22 09:27:48,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:48,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498617553] [2021-12-22 09:27:48,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:48,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:48,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:48,339 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:48,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:48,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498617553] [2021-12-22 09:27:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498617553] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:48,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:48,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:48,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355292637] [2021-12-22 09:27:48,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:48,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:27:48,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:48,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:27:48,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:27:48,342 INFO L87 Difference]: Start difference. First operand 1266 states and 1650 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:51,072 INFO L93 Difference]: Finished difference Result 4670 states and 6170 transitions. [2021-12-22 09:27:51,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:27:51,076 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-22 09:27:51,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:51,089 INFO L225 Difference]: With dead ends: 4670 [2021-12-22 09:27:51,089 INFO L226 Difference]: Without dead ends: 3406 [2021-12-22 09:27:51,092 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 [2021-12-22 09:27:51,103 INFO L933 BasicCegarLoop]: 292 mSDtfsCounter, 490 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:51,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [490 Valid, 348 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:27:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-12-22 09:27:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 3381. [2021-12-22 09:27:51,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3381 states, 3380 states have (on average 1.2366863905325445) internal successors, (4180), 3380 states have internal predecessors, (4180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3381 states to 3381 states and 4180 transitions. [2021-12-22 09:27:51,178 INFO L78 Accepts]: Start accepts. Automaton has 3381 states and 4180 transitions. Word has length 225 [2021-12-22 09:27:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:51,180 INFO L470 AbstractCegarLoop]: Abstraction has 3381 states and 4180 transitions. [2021-12-22 09:27:51,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:51,181 INFO L276 IsEmpty]: Start isEmpty. Operand 3381 states and 4180 transitions. [2021-12-22 09:27:51,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-22 09:27:51,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:51,185 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:51,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:27:51,185 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:51,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:51,188 INFO L85 PathProgramCache]: Analyzing trace with hash 385527484, now seen corresponding path program 1 times [2021-12-22 09:27:51,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:51,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280439284] [2021-12-22 09:27:51,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:51,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:51,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:51,313 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2021-12-22 09:27:51,313 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:51,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280439284] [2021-12-22 09:27:51,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280439284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:51,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:51,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:51,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017326317] [2021-12-22 09:27:51,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:51,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:51,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:51,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:51,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:51,316 INFO L87 Difference]: Start difference. First operand 3381 states and 4180 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:52,607 INFO L93 Difference]: Finished difference Result 8563 states and 10754 transitions. [2021-12-22 09:27:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:52,608 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 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 229 [2021-12-22 09:27:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:52,626 INFO L225 Difference]: With dead ends: 8563 [2021-12-22 09:27:52,627 INFO L226 Difference]: Without dead ends: 5483 [2021-12-22 09:27:52,632 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 [2021-12-22 09:27:52,633 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 257 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:52,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 339 Invalid, 1089 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:52,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-12-22 09:27:52,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 5478. [2021-12-22 09:27:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.16870549570933) internal successors, (6401), 5477 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:52,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6401 transitions. [2021-12-22 09:27:52,746 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6401 transitions. Word has length 229 [2021-12-22 09:27:52,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:52,747 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6401 transitions. [2021-12-22 09:27:52,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:52,749 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6401 transitions. [2021-12-22 09:27:52,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2021-12-22 09:27:52,754 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:52,755 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:52,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:27:52,756 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1064012372, now seen corresponding path program 1 times [2021-12-22 09:27:52,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:52,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082900310] [2021-12-22 09:27:52,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:52,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:52,914 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 131 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 09:27:52,915 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:52,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082900310] [2021-12-22 09:27:52,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082900310] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:52,915 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:52,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:27:52,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570530971] [2021-12-22 09:27:52,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:52,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:52,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:52,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:52,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:52,917 INFO L87 Difference]: Start difference. First operand 5478 states and 6401 transitions. Second operand has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:54,214 INFO L93 Difference]: Finished difference Result 10655 states and 12489 transitions. [2021-12-22 09:27:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 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 331 [2021-12-22 09:27:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:54,235 INFO L225 Difference]: With dead ends: 10655 [2021-12-22 09:27:54,235 INFO L226 Difference]: Without dead ends: 5478 [2021-12-22 09:27:54,240 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 [2021-12-22 09:27:54,242 INFO L933 BasicCegarLoop]: 324 mSDtfsCounter, 105 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:54,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 359 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-22 09:27:54,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5478 states. [2021-12-22 09:27:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5478 to 5478. [2021-12-22 09:27:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 1.1676100054774512) internal successors, (6395), 5477 states have internal predecessors, (6395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 6395 transitions. [2021-12-22 09:27:54,331 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 6395 transitions. Word has length 331 [2021-12-22 09:27:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 6395 transitions. [2021-12-22 09:27:54,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 91.66666666666667) internal successors, (275), 2 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:54,332 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 6395 transitions. [2021-12-22 09:27:54,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-12-22 09:27:54,336 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:54,337 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:54,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:27:54,337 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:54,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:54,338 INFO L85 PathProgramCache]: Analyzing trace with hash 131002693, now seen corresponding path program 1 times [2021-12-22 09:27:54,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:54,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846231117] [2021-12-22 09:27:54,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:54,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:54,489 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:27:54,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:54,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846231117] [2021-12-22 09:27:54,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846231117] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:54,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:27:54,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:27:54,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364211177] [2021-12-22 09:27:54,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:54,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:54,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:27:54,492 INFO L87 Difference]: Start difference. First operand 5478 states and 6395 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:56,166 INFO L93 Difference]: Finished difference Result 11851 states and 14151 transitions. [2021-12-22 09:27:56,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:56,167 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 346 [2021-12-22 09:27:56,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:56,189 INFO L225 Difference]: With dead ends: 11851 [2021-12-22 09:27:56,189 INFO L226 Difference]: Without dead ends: 6674 [2021-12-22 09:27:56,196 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 [2021-12-22 09:27:56,197 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 256 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:56,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 322 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-22 09:27:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6674 states. [2021-12-22 09:27:56,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6674 to 4876. [2021-12-22 09:27:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4876 states, 4875 states have (on average 1.1805128205128206) internal successors, (5755), 4875 states have internal predecessors, (5755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4876 states to 4876 states and 5755 transitions. [2021-12-22 09:27:56,281 INFO L78 Accepts]: Start accepts. Automaton has 4876 states and 5755 transitions. Word has length 346 [2021-12-22 09:27:56,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:56,282 INFO L470 AbstractCegarLoop]: Abstraction has 4876 states and 5755 transitions. [2021-12-22 09:27:56,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:56,283 INFO L276 IsEmpty]: Start isEmpty. Operand 4876 states and 5755 transitions. [2021-12-22 09:27:56,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2021-12-22 09:27:56,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:56,289 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, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:56,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:27:56,289 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:56,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:56,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1130119938, now seen corresponding path program 1 times [2021-12-22 09:27:56,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:56,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561140611] [2021-12-22 09:27:56,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:56,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:56,655 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 113 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:56,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:56,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561140611] [2021-12-22 09:27:56,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561140611] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:56,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134392653] [2021-12-22 09:27:56,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:56,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:56,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:56,658 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) [2021-12-22 09:27:56,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:27:56,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:56,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:27:56,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:27:57,504 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 188 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:27:57,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:27:57,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134392653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:27:57,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:27:57,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-22 09:27:57,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406411364] [2021-12-22 09:27:57,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:27:57,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:27:57,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:27:57,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:27:57,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:57,507 INFO L87 Difference]: Start difference. First operand 4876 states and 5755 transitions. Second operand has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:58,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:27:58,985 INFO L93 Difference]: Finished difference Result 11855 states and 14250 transitions. [2021-12-22 09:27:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:27:58,987 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 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 405 [2021-12-22 09:27:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:27:59,008 INFO L225 Difference]: With dead ends: 11855 [2021-12-22 09:27:59,009 INFO L226 Difference]: Without dead ends: 7280 [2021-12-22 09:27:59,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 406 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:27:59,016 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 249 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 282 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 282 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:27:59,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 345 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [282 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:27:59,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7280 states. [2021-12-22 09:27:59,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7280 to 6679. [2021-12-22 09:27:59,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6679 states, 6678 states have (on average 1.1647199760407307) internal successors, (7778), 6678 states have internal predecessors, (7778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6679 states to 6679 states and 7778 transitions. [2021-12-22 09:27:59,141 INFO L78 Accepts]: Start accepts. Automaton has 6679 states and 7778 transitions. Word has length 405 [2021-12-22 09:27:59,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:27:59,142 INFO L470 AbstractCegarLoop]: Abstraction has 6679 states and 7778 transitions. [2021-12-22 09:27:59,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 135.0) internal successors, (405), 3 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:27:59,142 INFO L276 IsEmpty]: Start isEmpty. Operand 6679 states and 7778 transitions. [2021-12-22 09:27:59,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 423 [2021-12-22 09:27:59,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:27:59,150 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:27:59,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:27:59,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:59,375 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:27:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:27:59,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1682645463, now seen corresponding path program 1 times [2021-12-22 09:27:59,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:27:59,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895078385] [2021-12-22 09:27:59,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:59,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:27:59,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 09:27:59,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:27:59,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895078385] [2021-12-22 09:27:59,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895078385] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:27:59,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315242639] [2021-12-22 09:27:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:27:59,591 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:27:59,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:27:59,592 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) [2021-12-22 09:27:59,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:27:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:27:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-22 09:27:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 09:28:00,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 09:28:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 411 backedges. 315 proven. 39 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 09:28:02,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315242639] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 09:28:02,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 09:28:02,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2021-12-22 09:28:02,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355549909] [2021-12-22 09:28:02,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 09:28:02,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-22 09:28:02,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:02,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-22 09:28:02,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:28:02,090 INFO L87 Difference]: Start difference. First operand 6679 states and 7778 transitions. Second operand has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:07,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:07,508 INFO L93 Difference]: Finished difference Result 19597 states and 22611 transitions. [2021-12-22 09:28:07,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-22 09:28:07,509 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 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 422 [2021-12-22 09:28:07,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:07,524 INFO L225 Difference]: With dead ends: 19597 [2021-12-22 09:28:07,524 INFO L226 Difference]: Without dead ends: 7876 [2021-12-22 09:28:07,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 853 GetRequests, 838 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-12-22 09:28:07,535 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2932 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 5835 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2932 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 6509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 5835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:07,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2932 Valid, 286 Invalid, 6509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 5835 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2021-12-22 09:28:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7876 states. [2021-12-22 09:28:07,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7876 to 6976. [2021-12-22 09:28:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6976 states, 6975 states have (on average 1.1105376344086022) internal successors, (7746), 6975 states have internal predecessors, (7746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:07,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6976 states to 6976 states and 7746 transitions. [2021-12-22 09:28:07,629 INFO L78 Accepts]: Start accepts. Automaton has 6976 states and 7746 transitions. Word has length 422 [2021-12-22 09:28:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:07,629 INFO L470 AbstractCegarLoop]: Abstraction has 6976 states and 7746 transitions. [2021-12-22 09:28:07,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 72.66666666666667) internal successors, (654), 8 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:07,630 INFO L276 IsEmpty]: Start isEmpty. Operand 6976 states and 7746 transitions. [2021-12-22 09:28:07,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-12-22 09:28:07,632 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:07,633 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:07,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:07,856 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,SelfDestructingSolverStorable8 [2021-12-22 09:28:07,857 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:07,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:07,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1464529448, now seen corresponding path program 1 times [2021-12-22 09:28:07,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:07,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233788370] [2021-12-22 09:28:07,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:07,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:07,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:08,044 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:28:08,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:08,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233788370] [2021-12-22 09:28:08,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233788370] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:08,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:08,045 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:08,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806230929] [2021-12-22 09:28:08,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:08,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:08,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:08,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:08,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:08,047 INFO L87 Difference]: Start difference. First operand 6976 states and 7746 transitions. Second operand has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:09,044 INFO L93 Difference]: Finished difference Result 15446 states and 17263 transitions. [2021-12-22 09:28:09,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 436 [2021-12-22 09:28:09,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:09,063 INFO L225 Difference]: With dead ends: 15446 [2021-12-22 09:28:09,063 INFO L226 Difference]: Without dead ends: 8472 [2021-12-22 09:28:09,071 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 [2021-12-22 09:28:09,071 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 267 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 554 SdHoareTripleChecker+Invalid, 955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:09,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [267 Valid, 554 Invalid, 955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:09,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8472 states. [2021-12-22 09:28:09,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8472 to 8171. [2021-12-22 09:28:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 1.088984088127295) internal successors, (8897), 8170 states have internal predecessors, (8897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 8897 transitions. [2021-12-22 09:28:09,169 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 8897 transitions. Word has length 436 [2021-12-22 09:28:09,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:09,170 INFO L470 AbstractCegarLoop]: Abstraction has 8171 states and 8897 transitions. [2021-12-22 09:28:09,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.33333333333333) internal successors, (331), 3 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 8897 transitions. [2021-12-22 09:28:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 534 [2021-12-22 09:28:09,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:09,174 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, 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, 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] [2021-12-22 09:28:09,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 09:28:09,175 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:09,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:09,175 INFO L85 PathProgramCache]: Analyzing trace with hash -2118497435, now seen corresponding path program 1 times [2021-12-22 09:28:09,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:09,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167782107] [2021-12-22 09:28:09,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:09,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:09,386 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2021-12-22 09:28:09,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:09,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167782107] [2021-12-22 09:28:09,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167782107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:09,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:09,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:09,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570179033] [2021-12-22 09:28:09,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:09,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:09,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:09,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:09,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:09,390 INFO L87 Difference]: Start difference. First operand 8171 states and 8897 transitions. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:10,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:10,438 INFO L93 Difference]: Finished difference Result 18731 states and 20550 transitions. [2021-12-22 09:28:10,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:10,438 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 533 [2021-12-22 09:28:10,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:10,455 INFO L225 Difference]: With dead ends: 18731 [2021-12-22 09:28:10,456 INFO L226 Difference]: Without dead ends: 10562 [2021-12-22 09:28:10,464 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 [2021-12-22 09:28:10,465 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 271 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:10,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 202 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:28:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-12-22 09:28:10,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 9963. [2021-12-22 09:28:10,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9963 states, 9962 states have (on average 1.0847219433848625) internal successors, (10806), 9962 states have internal predecessors, (10806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:10,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9963 states to 9963 states and 10806 transitions. [2021-12-22 09:28:10,579 INFO L78 Accepts]: Start accepts. Automaton has 9963 states and 10806 transitions. Word has length 533 [2021-12-22 09:28:10,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:10,580 INFO L470 AbstractCegarLoop]: Abstraction has 9963 states and 10806 transitions. [2021-12-22 09:28:10,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:10,580 INFO L276 IsEmpty]: Start isEmpty. Operand 9963 states and 10806 transitions. [2021-12-22 09:28:10,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2021-12-22 09:28:10,584 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:10,585 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, 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, 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] [2021-12-22 09:28:10,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 09:28:10,585 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:10,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1773865919, now seen corresponding path program 1 times [2021-12-22 09:28:10,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:10,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585880812] [2021-12-22 09:28:10,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:10,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:10,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2021-12-22 09:28:10,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:10,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585880812] [2021-12-22 09:28:10,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585880812] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:10,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:10,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:10,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361362209] [2021-12-22 09:28:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:10,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:10,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:10,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:10,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:10,839 INFO L87 Difference]: Start difference. First operand 9963 states and 10806 transitions. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:11,732 INFO L93 Difference]: Finished difference Result 19922 states and 21652 transitions. [2021-12-22 09:28:11,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:11,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 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 560 [2021-12-22 09:28:11,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:11,753 INFO L225 Difference]: With dead ends: 19922 [2021-12-22 09:28:11,754 INFO L226 Difference]: Without dead ends: 10260 [2021-12-22 09:28:11,763 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 [2021-12-22 09:28:11,764 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 437 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:11,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 69 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:11,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10260 states. [2021-12-22 09:28:11,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10260 to 9961. [2021-12-22 09:28:11,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9961 states, 9960 states have (on average 1.0845381526104418) internal successors, (10802), 9960 states have internal predecessors, (10802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9961 states to 9961 states and 10802 transitions. [2021-12-22 09:28:11,880 INFO L78 Accepts]: Start accepts. Automaton has 9961 states and 10802 transitions. Word has length 560 [2021-12-22 09:28:11,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:11,881 INFO L470 AbstractCegarLoop]: Abstraction has 9961 states and 10802 transitions. [2021-12-22 09:28:11,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:11,881 INFO L276 IsEmpty]: Start isEmpty. Operand 9961 states and 10802 transitions. [2021-12-22 09:28:11,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2021-12-22 09:28:11,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:11,886 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, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:28:11,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 09:28:11,887 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:11,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:11,887 INFO L85 PathProgramCache]: Analyzing trace with hash -566181386, now seen corresponding path program 1 times [2021-12-22 09:28:11,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:11,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924072828] [2021-12-22 09:28:11,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:11,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:12,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 426 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-12-22 09:28:12,159 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924072828] [2021-12-22 09:28:12,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924072828] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:12,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:12,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:12,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161768851] [2021-12-22 09:28:12,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:12,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:12,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:12,162 INFO L87 Difference]: Start difference. First operand 9961 states and 10802 transitions. Second operand has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:13,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:13,197 INFO L93 Difference]: Finished difference Result 22611 states and 24594 transitions. [2021-12-22 09:28:13,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:13,197 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 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 586 [2021-12-22 09:28:13,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:13,217 INFO L225 Difference]: With dead ends: 22611 [2021-12-22 09:28:13,218 INFO L226 Difference]: Without dead ends: 12652 [2021-12-22 09:28:13,227 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 [2021-12-22 09:28:13,228 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 198 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:13,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 173 Invalid, 941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-22 09:28:13,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2021-12-22 09:28:13,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 12054. [2021-12-22 09:28:13,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12054 states, 12053 states have (on average 1.0817223927652866) internal successors, (13038), 12053 states have internal predecessors, (13038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:13,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12054 states to 12054 states and 13038 transitions. [2021-12-22 09:28:13,413 INFO L78 Accepts]: Start accepts. Automaton has 12054 states and 13038 transitions. Word has length 586 [2021-12-22 09:28:13,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:13,414 INFO L470 AbstractCegarLoop]: Abstraction has 12054 states and 13038 transitions. [2021-12-22 09:28:13,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.33333333333334) internal successors, (481), 3 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:13,414 INFO L276 IsEmpty]: Start isEmpty. Operand 12054 states and 13038 transitions. [2021-12-22 09:28:13,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2021-12-22 09:28:13,419 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:13,419 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:13,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 09:28:13,420 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:13,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:13,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1867245461, now seen corresponding path program 1 times [2021-12-22 09:28:13,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:13,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103025186] [2021-12-22 09:28:13,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:13,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:13,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 264 proven. 188 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-22 09:28:13,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103025186] [2021-12-22 09:28:13,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103025186] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:13,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624836178] [2021-12-22 09:28:13,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:13,714 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:13,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:13,716 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) [2021-12-22 09:28:13,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-22 09:28:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:13,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:28:13,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:15,080 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 170 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-22 09:28:15,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:15,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624836178] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:15,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:15,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:28:15,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460285508] [2021-12-22 09:28:15,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:15,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:15,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:15,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:15,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:15,083 INFO L87 Difference]: Start difference. First operand 12054 states and 13038 transitions. Second operand has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:16,577 INFO L93 Difference]: Finished difference Result 35839 states and 38890 transitions. [2021-12-22 09:28:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:16,577 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 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 594 [2021-12-22 09:28:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:16,606 INFO L225 Difference]: With dead ends: 35839 [2021-12-22 09:28:16,606 INFO L226 Difference]: Without dead ends: 24086 [2021-12-22 09:28:16,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:16,620 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 619 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1485 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 1590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 1485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:16,620 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 154 Invalid, 1590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 1485 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-22 09:28:16,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24086 states. [2021-12-22 09:28:16,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24086 to 20489. [2021-12-22 09:28:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20488 states have (on average 1.0808766106989458) internal successors, (22145), 20488 states have internal predecessors, (22145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 22145 transitions. [2021-12-22 09:28:16,964 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 22145 transitions. Word has length 594 [2021-12-22 09:28:16,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:16,965 INFO L470 AbstractCegarLoop]: Abstraction has 20489 states and 22145 transitions. [2021-12-22 09:28:16,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.0) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:16,965 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 22145 transitions. [2021-12-22 09:28:16,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 639 [2021-12-22 09:28:16,972 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:16,973 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, 5, 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, 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] [2021-12-22 09:28:17,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:17,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:17,188 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:17,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1852804858, now seen corresponding path program 1 times [2021-12-22 09:28:17,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:17,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139607829] [2021-12-22 09:28:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:17,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:17,470 INFO L134 CoverageAnalysis]: Checked inductivity of 794 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2021-12-22 09:28:17,471 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:17,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139607829] [2021-12-22 09:28:17,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139607829] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:17,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:17,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:17,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046269365] [2021-12-22 09:28:17,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:17,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:17,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:17,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:17,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:17,473 INFO L87 Difference]: Start difference. First operand 20489 states and 22145 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:18,495 INFO L93 Difference]: Finished difference Result 43666 states and 47508 transitions. [2021-12-22 09:28:18,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:18,496 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 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 638 [2021-12-22 09:28:18,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:18,521 INFO L225 Difference]: With dead ends: 43666 [2021-12-22 09:28:18,522 INFO L226 Difference]: Without dead ends: 24079 [2021-12-22 09:28:18,535 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 [2021-12-22 09:28:18,535 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 294 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 735 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 294 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:18,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [294 Valid, 156 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 735 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:18,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24079 states. [2021-12-22 09:28:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24079 to 23779. [2021-12-22 09:28:18,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23779 states, 23778 states have (on average 1.080704853225671) internal successors, (25697), 23778 states have internal predecessors, (25697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23779 states to 23779 states and 25697 transitions. [2021-12-22 09:28:18,819 INFO L78 Accepts]: Start accepts. Automaton has 23779 states and 25697 transitions. Word has length 638 [2021-12-22 09:28:18,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:18,820 INFO L470 AbstractCegarLoop]: Abstraction has 23779 states and 25697 transitions. [2021-12-22 09:28:18,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 23779 states and 25697 transitions. [2021-12-22 09:28:18,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 689 [2021-12-22 09:28:18,831 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:18,832 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, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:18,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 09:28:18,832 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:18,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:18,833 INFO L85 PathProgramCache]: Analyzing trace with hash 838645165, now seen corresponding path program 1 times [2021-12-22 09:28:18,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:18,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106248856] [2021-12-22 09:28:18,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:18,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:19,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 829 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 602 trivial. 0 not checked. [2021-12-22 09:28:19,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:19,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106248856] [2021-12-22 09:28:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106248856] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:19,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:19,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:19,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515425868] [2021-12-22 09:28:19,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:19,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:19,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:19,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:19,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:19,148 INFO L87 Difference]: Start difference. First operand 23779 states and 25697 transitions. Second operand has 3 states, 3 states have (on average 111.0) 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) [2021-12-22 09:28:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:20,138 INFO L93 Difference]: Finished difference Result 48167 states and 52010 transitions. [2021-12-22 09:28:20,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:20,139 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 111.0) 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 688 [2021-12-22 09:28:20,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:20,168 INFO L225 Difference]: With dead ends: 48167 [2021-12-22 09:28:20,168 INFO L226 Difference]: Without dead ends: 24390 [2021-12-22 09:28:20,186 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 [2021-12-22 09:28:20,187 INFO L933 BasicCegarLoop]: 489 mSDtfsCounter, 264 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 838 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 838 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:20,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 527 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 838 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-22 09:28:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24390 states. [2021-12-22 09:28:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24390 to 23477. [2021-12-22 09:28:20,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0772278071221673) internal successors, (25289), 23476 states have internal predecessors, (25289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25289 transitions. [2021-12-22 09:28:20,587 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25289 transitions. Word has length 688 [2021-12-22 09:28:20,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:20,588 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25289 transitions. [2021-12-22 09:28:20,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.0) 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) [2021-12-22 09:28:20,589 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25289 transitions. [2021-12-22 09:28:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2021-12-22 09:28:20,608 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:20,609 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, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:28:20,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 09:28:20,609 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:20,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:20,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1597872221, now seen corresponding path program 1 times [2021-12-22 09:28:20,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:20,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071211788] [2021-12-22 09:28:20,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:20,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:20,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:20,892 INFO L134 CoverageAnalysis]: Checked inductivity of 941 backedges. 602 proven. 0 refuted. 0 times theorem prover too weak. 339 trivial. 0 not checked. [2021-12-22 09:28:20,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:20,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071211788] [2021-12-22 09:28:20,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071211788] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:20,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:20,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:20,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804332661] [2021-12-22 09:28:20,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:20,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:20,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:20,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:20,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:20,896 INFO L87 Difference]: Start difference. First operand 23477 states and 25289 transitions. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:21,823 INFO L93 Difference]: Finished difference Result 46655 states and 50279 transitions. [2021-12-22 09:28:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 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 744 [2021-12-22 09:28:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:21,844 INFO L225 Difference]: With dead ends: 46655 [2021-12-22 09:28:21,844 INFO L226 Difference]: Without dead ends: 23479 [2021-12-22 09:28:21,855 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 [2021-12-22 09:28:21,856 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 227 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:21,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 107 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-22 09:28:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23479 states. [2021-12-22 09:28:22,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23479 to 23477. [2021-12-22 09:28:22,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23477 states, 23476 states have (on average 1.0698585789742716) internal successors, (25116), 23476 states have internal predecessors, (25116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:22,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23477 states to 23477 states and 25116 transitions. [2021-12-22 09:28:22,062 INFO L78 Accepts]: Start accepts. Automaton has 23477 states and 25116 transitions. Word has length 744 [2021-12-22 09:28:22,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:22,063 INFO L470 AbstractCegarLoop]: Abstraction has 23477 states and 25116 transitions. [2021-12-22 09:28:22,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:22,063 INFO L276 IsEmpty]: Start isEmpty. Operand 23477 states and 25116 transitions. [2021-12-22 09:28:22,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 749 [2021-12-22 09:28:22,075 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:22,076 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, 6, 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, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:22,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 09:28:22,076 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:22,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:22,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1045679782, now seen corresponding path program 1 times [2021-12-22 09:28:22,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:22,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187966456] [2021-12-22 09:28:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:22,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:22,317 INFO L134 CoverageAnalysis]: Checked inductivity of 1251 backedges. 860 proven. 0 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2021-12-22 09:28:22,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:22,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187966456] [2021-12-22 09:28:22,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187966456] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:22,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:22,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-22 09:28:22,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450525819] [2021-12-22 09:28:22,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:22,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:22,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:22,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:22,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:28:22,320 INFO L87 Difference]: Start difference. First operand 23477 states and 25116 transitions. Second operand has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:23,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:23,769 INFO L93 Difference]: Finished difference Result 49344 states and 52795 transitions. [2021-12-22 09:28:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:23,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 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 748 [2021-12-22 09:28:23,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:23,797 INFO L225 Difference]: With dead ends: 49344 [2021-12-22 09:28:23,797 INFO L226 Difference]: Without dead ends: 27666 [2021-12-22 09:28:23,811 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 [2021-12-22 09:28:23,812 INFO L933 BasicCegarLoop]: 391 mSDtfsCounter, 587 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 1724 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 1724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:23,812 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 435 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 1724 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-22 09:28:23,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27666 states. [2021-12-22 09:28:24,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27666 to 27066. [2021-12-22 09:28:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27066 states, 27065 states have (on average 1.0520968039903935) internal successors, (28475), 27065 states have internal predecessors, (28475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27066 states to 27066 states and 28475 transitions. [2021-12-22 09:28:24,180 INFO L78 Accepts]: Start accepts. Automaton has 27066 states and 28475 transitions. Word has length 748 [2021-12-22 09:28:24,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:24,180 INFO L470 AbstractCegarLoop]: Abstraction has 27066 states and 28475 transitions. [2021-12-22 09:28:24,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 116.5) internal successors, (466), 4 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:24,181 INFO L276 IsEmpty]: Start isEmpty. Operand 27066 states and 28475 transitions. [2021-12-22 09:28:24,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-12-22 09:28:24,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:24,192 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-22 09:28:24,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 09:28:24,192 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:24,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:24,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1871974769, now seen corresponding path program 1 times [2021-12-22 09:28:24,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:24,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673561964] [2021-12-22 09:28:24,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:24,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:24,479 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 571 proven. 188 refuted. 0 times theorem prover too weak. 194 trivial. 0 not checked. [2021-12-22 09:28:24,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:24,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673561964] [2021-12-22 09:28:24,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673561964] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:28:24,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637271996] [2021-12-22 09:28:24,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:24,480 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:24,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:28:24,484 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) [2021-12-22 09:28:24,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-22 09:28:24,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:24,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-22 09:28:24,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:28:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2021-12-22 09:28:26,518 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:28:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637271996] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:26,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:28:26,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-12-22 09:28:26,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693700560] [2021-12-22 09:28:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:28:26,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:26,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:28:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:26,520 INFO L87 Difference]: Start difference. First operand 27066 states and 28475 transitions. Second operand has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:27,931 INFO L93 Difference]: Finished difference Result 34277 states and 36072 transitions. [2021-12-22 09:28:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:28:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 750 [2021-12-22 09:28:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:27,972 INFO L225 Difference]: With dead ends: 34277 [2021-12-22 09:28:27,973 INFO L226 Difference]: Without dead ends: 34275 [2021-12-22 09:28:27,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 753 GetRequests, 748 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-22 09:28:27,981 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 495 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1037 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:27,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 151 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 780 Invalid, 0 Unknown, 1037 Unchecked, 1.2s Time] [2021-12-22 09:28:28,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34275 states. [2021-12-22 09:28:28,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34275 to 30971. [2021-12-22 09:28:28,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0545689376816274) internal successors, (32660), 30970 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:28,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32660 transitions. [2021-12-22 09:28:28,365 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32660 transitions. Word has length 750 [2021-12-22 09:28:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:28,366 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32660 transitions. [2021-12-22 09:28:28,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:28,366 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32660 transitions. [2021-12-22 09:28:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 769 [2021-12-22 09:28:28,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:28,379 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, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:28,397 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-22 09:28:28,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:28:28,580 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:28,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:28,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1855722341, now seen corresponding path program 1 times [2021-12-22 09:28:28,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:28,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274316265] [2021-12-22 09:28:28,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:28,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:28,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1197 backedges. 801 proven. 0 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2021-12-22 09:28:28,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:28,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274316265] [2021-12-22 09:28:28,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274316265] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:28,923 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:28,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:28,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657447409] [2021-12-22 09:28:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:28,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:28,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:28,925 INFO L87 Difference]: Start difference. First operand 30971 states and 32660 transitions. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:29,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:28:29,848 INFO L93 Difference]: Finished difference Result 61641 states and 65017 transitions. [2021-12-22 09:28:29,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:28:29,851 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 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 768 [2021-12-22 09:28:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:28:29,883 INFO L225 Difference]: With dead ends: 61641 [2021-12-22 09:28:29,883 INFO L226 Difference]: Without dead ends: 30971 [2021-12-22 09:28:29,902 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 [2021-12-22 09:28:29,903 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 226 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:28:29,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 508 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 09:28:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30971 states. [2021-12-22 09:28:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30971 to 30971. [2021-12-22 09:28:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30971 states, 30970 states have (on average 1.0424927349047466) internal successors, (32286), 30970 states have internal predecessors, (32286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:30,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30971 states to 30971 states and 32286 transitions. [2021-12-22 09:28:30,324 INFO L78 Accepts]: Start accepts. Automaton has 30971 states and 32286 transitions. Word has length 768 [2021-12-22 09:28:30,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:28:30,325 INFO L470 AbstractCegarLoop]: Abstraction has 30971 states and 32286 transitions. [2021-12-22 09:28:30,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:28:30,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30971 states and 32286 transitions. [2021-12-22 09:28:30,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 771 [2021-12-22 09:28:30,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:28:30,341 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, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:28:30,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 09:28:30,341 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:28:30,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:28:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -184573624, now seen corresponding path program 1 times [2021-12-22 09:28:30,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:28:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097336639] [2021-12-22 09:28:30,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:28:30,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:28:30,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:28:30,585 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 766 trivial. 0 not checked. [2021-12-22 09:28:30,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:28:30,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097336639] [2021-12-22 09:28:30,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097336639] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:28:30,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:28:30,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:28:30,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319220159] [2021-12-22 09:28:30,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:28:30,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:28:30,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:28:30,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:28:30,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:28:30,588 INFO L87 Difference]: Start difference. First operand 30971 states and 32286 transitions. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)