./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC --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 93ddc895418216afe230ea40e87acd63de5c2d0d .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:23:27,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:23:27,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:23:27,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:23:27,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:23:27,257 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:23:27,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:23:27,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:23:27,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:23:27,274 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:23:27,275 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:23:27,276 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:23:27,277 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:23:27,280 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:23:27,281 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:23:27,283 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:23:27,284 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:23:27,285 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:23:27,291 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:23:27,300 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:23:27,302 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:23:27,304 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:23:27,307 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:23:27,308 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:23:27,316 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:23:27,317 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:23:27,317 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:23:27,319 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:23:27,320 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:23:27,321 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:23:27,322 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:23:27,323 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:23:27,324 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:23:27,326 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:23:27,327 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:23:27,327 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:23:27,328 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:23:27,328 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:23:27,328 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:23:27,329 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:23:27,330 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:23:27,332 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:23:27,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:23:27,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:23:27,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:23:27,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:23:27,381 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:23:27,381 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:23:27,381 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:23:27,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:23:27,382 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:23:27,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:23:27,389 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:23:27,389 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:23:27,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:23:27,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:23:27,390 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:23:27,390 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:23:27,390 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:23:27,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:23:27,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:23:27,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:23:27,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:27,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:23:27,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:23:27,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:23:27,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:23:27,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:23:27,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:23:27,393 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:23:27,393 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93ddc895418216afe230ea40e87acd63de5c2d0d [2021-10-11 00:23:27,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:23:27,703 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:23:27,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:23:27,711 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:23:27,712 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:23:27,713 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loop-simple/nested_2.c [2021-10-11 00:23:27,806 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/data/8a4ba26e3/1ca8d65d97c4487b9dcb70745e19bfa6/FLAGf6a7a40e8 [2021-10-11 00:23:28,307 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:23:28,308 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/sv-benchmarks/c/loop-simple/nested_2.c [2021-10-11 00:23:28,321 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/data/8a4ba26e3/1ca8d65d97c4487b9dcb70745e19bfa6/FLAGf6a7a40e8 [2021-10-11 00:23:28,659 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/data/8a4ba26e3/1ca8d65d97c4487b9dcb70745e19bfa6 [2021-10-11 00:23:28,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:23:28,663 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:23:28,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:28,671 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:23:28,675 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:23:28,676 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@509a396e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28, skipping insertion in model container [2021-10-11 00:23:28,684 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,692 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:23:28,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:23:28,865 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-11 00:23:28,870 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:28,883 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:23:28,899 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/sv-benchmarks/c/loop-simple/nested_2.c[730,743] [2021-10-11 00:23:28,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:23:28,914 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:23:28,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28 WrapperNode [2021-10-11 00:23:28,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:23:28,917 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:28,917 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:23:28,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:23:28,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,950 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:23:28,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:23:28,951 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:23:28,951 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:23:28,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,970 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... [2021-10-11 00:23:28,972 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:23:28,973 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:23:28,973 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:23:28,973 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:23:28,974 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:23:29,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:23:29,042 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:23:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:23:29,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:23:29,216 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:23:29,216 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-11 00:23:29,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29 BoogieIcfgContainer [2021-10-11 00:23:29,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:23:29,221 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:23:29,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:23:29,225 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:23:29,225 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:23:28" (1/3) ... [2021-10-11 00:23:29,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475734eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:29, skipping insertion in model container [2021-10-11 00:23:29,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:23:28" (2/3) ... [2021-10-11 00:23:29,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@475734eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:23:29, skipping insertion in model container [2021-10-11 00:23:29,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29" (3/3) ... [2021-10-11 00:23:29,229 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_2.c [2021-10-11 00:23:29,243 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:23:29,247 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:23:29,258 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:23:29,281 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:23:29,281 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:23:29,281 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:23:29,281 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:23:29,282 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:23:29,282 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:23:29,282 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:23:29,282 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:23:29,296 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:23:29,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-11 00:23:29,301 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:29,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-11 00:23:29,302 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:29,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:29,308 INFO L82 PathProgramCache]: Analyzing trace with hash 28697382, now seen corresponding path program 1 times [2021-10-11 00:23:29,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:29,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993629131] [2021-10-11 00:23:29,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:29,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993629131] [2021-10-11 00:23:29,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:29,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:23:29,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851188354] [2021-10-11 00:23:29,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:23:29,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:29,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:23:29,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:29,510 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 3 states. [2021-10-11 00:23:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:29,545 INFO L93 Difference]: Finished difference Result 28 states and 40 transitions. [2021-10-11 00:23:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:23:29,547 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2021-10-11 00:23:29,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:29,557 INFO L225 Difference]: With dead ends: 28 [2021-10-11 00:23:29,557 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 00:23:29,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:29,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 00:23:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 10. [2021-10-11 00:23:29,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:23:29,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2021-10-11 00:23:29,598 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 5 [2021-10-11 00:23:29,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:29,598 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2021-10-11 00:23:29,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:23:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2021-10-11 00:23:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:23:29,599 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:29,599 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:29,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:23:29,600 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:29,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:29,617 INFO L82 PathProgramCache]: Analyzing trace with hash 269344378, now seen corresponding path program 1 times [2021-10-11 00:23:29,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:29,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119496602] [2021-10-11 00:23:29,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:29,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:29,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119496602] [2021-10-11 00:23:29,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:23:29,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:23:29,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770201877] [2021-10-11 00:23:29,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:23:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:29,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:23:29,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:29,713 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand 3 states. [2021-10-11 00:23:29,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:29,751 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-10-11 00:23:29,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:23:29,752 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2021-10-11 00:23:29,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:29,753 INFO L225 Difference]: With dead ends: 19 [2021-10-11 00:23:29,753 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:23:29,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:23:29,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:23:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-11 00:23:29,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 00:23:29,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 00:23:29,759 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2021-10-11 00:23:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:29,759 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 00:23:29,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:23:29,760 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 00:23:29,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:23:29,761 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:29,761 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:29,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:23:29,761 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:29,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:29,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1485378760, now seen corresponding path program 1 times [2021-10-11 00:23:29,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:29,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783401431] [2021-10-11 00:23:29,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783401431] [2021-10-11 00:23:29,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66480106] [2021-10-11 00:23:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:29,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-11 00:23:29,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:30,033 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:30,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:30,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:23:30,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885790467] [2021-10-11 00:23:30,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:23:30,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:30,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:23:30,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:30,037 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 5 states. [2021-10-11 00:23:30,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:30,064 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2021-10-11 00:23:30,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:23:30,065 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2021-10-11 00:23:30,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:30,065 INFO L225 Difference]: With dead ends: 22 [2021-10-11 00:23:30,066 INFO L226 Difference]: Without dead ends: 14 [2021-10-11 00:23:30,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:23:30,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-11 00:23:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-10-11 00:23:30,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 00:23:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-10-11 00:23:30,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2021-10-11 00:23:30,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:30,071 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-10-11 00:23:30,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:23:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-10-11 00:23:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:23:30,072 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:30,072 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:23:30,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:23:30,286 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:30,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:30,287 INFO L82 PathProgramCache]: Analyzing trace with hash 147832950, now seen corresponding path program 2 times [2021-10-11 00:23:30,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:30,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767951004] [2021-10-11 00:23:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:30,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:30,332 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-11 00:23:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767951004] [2021-10-11 00:23:30,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859200741] [2021-10-11 00:23:30,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:30,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:23:30,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:30,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:23:30,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:30,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:23:30,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:30,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-10-11 00:23:30,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964130410] [2021-10-11 00:23:30,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:23:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:30,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:23:30,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:30,443 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 7 states. [2021-10-11 00:23:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:30,552 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-11 00:23:30,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-11 00:23:30,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2021-10-11 00:23:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:30,554 INFO L225 Difference]: With dead ends: 45 [2021-10-11 00:23:30,554 INFO L226 Difference]: Without dead ends: 35 [2021-10-11 00:23:30,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:23:30,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-11 00:23:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2021-10-11 00:23:30,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2021-10-11 00:23:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-11 00:23:30,561 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-10-11 00:23:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:30,561 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-11 00:23:30,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:23:30,562 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-11 00:23:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-11 00:23:30,562 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:30,563 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 00:23:30,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:30,789 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:30,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1657769242, now seen corresponding path program 3 times [2021-10-11 00:23:30,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:30,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327149269] [2021-10-11 00:23:30,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:30,900 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 27 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-10-11 00:23:30,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327149269] [2021-10-11 00:23:30,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068505223] [2021-10-11 00:23:30,902 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:30,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-11 00:23:30,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:30,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:23:30,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-10-11 00:23:31,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:31,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-11 00:23:31,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139472704] [2021-10-11 00:23:31,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:23:31,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:31,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:23:31,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:31,070 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2021-10-11 00:23:31,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:31,107 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2021-10-11 00:23:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:23:31,108 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 23 [2021-10-11 00:23:31,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:31,109 INFO L225 Difference]: With dead ends: 44 [2021-10-11 00:23:31,109 INFO L226 Difference]: Without dead ends: 30 [2021-10-11 00:23:31,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:31,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-11 00:23:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2021-10-11 00:23:31,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-10-11 00:23:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-10-11 00:23:31,122 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2021-10-11 00:23:31,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:31,124 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-10-11 00:23:31,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:23:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-10-11 00:23:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-11 00:23:31,127 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:31,127 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 00:23:31,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:31,348 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:31,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:31,349 INFO L82 PathProgramCache]: Analyzing trace with hash 953965478, now seen corresponding path program 4 times [2021-10-11 00:23:31,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:31,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130069643] [2021-10-11 00:23:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 00:23:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130069643] [2021-10-11 00:23:31,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227416089] [2021-10-11 00:23:31,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:31,474 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:23:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:23:31,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:31,521 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 43 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-10-11 00:23:31,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:31,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-11 00:23:31,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659356139] [2021-10-11 00:23:31,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:23:31,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:31,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:23:31,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:23:31,524 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2021-10-11 00:23:31,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:31,559 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2021-10-11 00:23:31,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:23:31,560 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2021-10-11 00:23:31,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:31,561 INFO L225 Difference]: With dead ends: 50 [2021-10-11 00:23:31,561 INFO L226 Difference]: Without dead ends: 34 [2021-10-11 00:23:31,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:23:31,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-11 00:23:31,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2021-10-11 00:23:31,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-10-11 00:23:31,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-10-11 00:23:31,568 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 27 [2021-10-11 00:23:31,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:31,568 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-10-11 00:23:31,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:23:31,568 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-10-11 00:23:31,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-11 00:23:31,570 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:31,570 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 00:23:31,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:31,789 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:31,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:31,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1188152166, now seen corresponding path program 5 times [2021-10-11 00:23:31,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:31,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065970167] [2021-10-11 00:23:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 00:23:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065970167] [2021-10-11 00:23:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847653242] [2021-10-11 00:23:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:31,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-10-11 00:23:31,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:31,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:23:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 63 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-10-11 00:23:32,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:32,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-11 00:23:32,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244632143] [2021-10-11 00:23:32,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:23:32,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:32,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:23:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:23:32,029 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 9 states. [2021-10-11 00:23:32,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:32,075 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-10-11 00:23:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:23:32,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2021-10-11 00:23:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:32,077 INFO L225 Difference]: With dead ends: 54 [2021-10-11 00:23:32,077 INFO L226 Difference]: Without dead ends: 36 [2021-10-11 00:23:32,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:23:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-11 00:23:32,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-11 00:23:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2021-10-11 00:23:32,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-10-11 00:23:32,098 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 31 [2021-10-11 00:23:32,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:32,098 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-10-11 00:23:32,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:23:32,098 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-10-11 00:23:32,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-11 00:23:32,101 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:32,101 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-11 00:23:32,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-10-11 00:23:32,329 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:32,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:32,329 INFO L82 PathProgramCache]: Analyzing trace with hash 750610982, now seen corresponding path program 6 times [2021-10-11 00:23:32,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:32,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232871356] [2021-10-11 00:23:32,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:32,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:32,407 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 00:23:32,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232871356] [2021-10-11 00:23:32,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718201957] [2021-10-11 00:23:32,408 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:32,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-11 00:23:32,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:32,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-11 00:23:32,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:32,524 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-10-11 00:23:32,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:32,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-11 00:23:32,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443657588] [2021-10-11 00:23:32,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:23:32,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:32,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:23:32,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:23:32,527 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 6 states. [2021-10-11 00:23:32,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:32,560 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2021-10-11 00:23:32,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:23:32,561 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2021-10-11 00:23:32,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:32,564 INFO L225 Difference]: With dead ends: 68 [2021-10-11 00:23:32,567 INFO L226 Difference]: Without dead ends: 65 [2021-10-11 00:23:32,568 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:23:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-11 00:23:32,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2021-10-11 00:23:32,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-10-11 00:23:32,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2021-10-11 00:23:32,583 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 35 [2021-10-11 00:23:32,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:32,583 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2021-10-11 00:23:32,583 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:23:32,583 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2021-10-11 00:23:32,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-11 00:23:32,585 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:32,585 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 3, 3, 3, 1, 1, 1, 1, 1] [2021-10-11 00:23:32,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:32,797 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1549796206, now seen corresponding path program 7 times [2021-10-11 00:23:32,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:32,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009963330] [2021-10-11 00:23:32,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:32,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:32,868 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-10-11 00:23:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009963330] [2021-10-11 00:23:32,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552256627] [2021-10-11 00:23:32,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:23:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:33,022 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 264 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-10-11 00:23:33,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:33,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-11 00:23:33,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042476694] [2021-10-11 00:23:33,035 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:23:33,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:33,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:23:33,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:33,036 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 7 states. [2021-10-11 00:23:33,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:33,078 INFO L93 Difference]: Finished difference Result 83 states and 88 transitions. [2021-10-11 00:23:33,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:23:33,078 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2021-10-11 00:23:33,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:33,081 INFO L225 Difference]: With dead ends: 83 [2021-10-11 00:23:33,082 INFO L226 Difference]: Without dead ends: 80 [2021-10-11 00:23:33,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:23:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-11 00:23:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2021-10-11 00:23:33,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-10-11 00:23:33,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2021-10-11 00:23:33,105 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 50 [2021-10-11 00:23:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:33,106 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2021-10-11 00:23:33,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:23:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2021-10-11 00:23:33,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-11 00:23:33,108 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:33,108 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-11 00:23:33,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:33,331 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:33,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:33,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1394520358, now seen corresponding path program 8 times [2021-10-11 00:23:33,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:33,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259140753] [2021-10-11 00:23:33,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-11 00:23:33,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259140753] [2021-10-11 00:23:33,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989255729] [2021-10-11 00:23:33,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:33,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:23:33,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:33,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-11 00:23:33,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:33,558 INFO L134 CoverageAnalysis]: Checked inductivity of 670 backedges. 0 proven. 526 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-10-11 00:23:33,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:23:33,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-11 00:23:33,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726638801] [2021-10-11 00:23:33,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:23:33,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:33,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:23:33,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:23:33,561 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 8 states. [2021-10-11 00:23:33,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:33,598 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2021-10-11 00:23:33,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:23:33,598 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 65 [2021-10-11 00:23:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:33,601 INFO L225 Difference]: With dead ends: 98 [2021-10-11 00:23:33,602 INFO L226 Difference]: Without dead ends: 95 [2021-10-11 00:23:33,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:23:33,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-11 00:23:33,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 81. [2021-10-11 00:23:33,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-10-11 00:23:33,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 86 transitions. [2021-10-11 00:23:33,623 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 86 transitions. Word has length 65 [2021-10-11 00:23:33,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:33,623 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 86 transitions. [2021-10-11 00:23:33,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:23:33,624 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 86 transitions. [2021-10-11 00:23:33,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-11 00:23:33,625 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:23:33,625 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 5, 5, 5, 1, 1, 1, 1, 1] [2021-10-11 00:23:33,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-11 00:23:33,849 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:23:33,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:23:33,849 INFO L82 PathProgramCache]: Analyzing trace with hash -60302226, now seen corresponding path program 9 times [2021-10-11 00:23:33,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:23:33,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590055342] [2021-10-11 00:23:33,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:23:33,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:23:33,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 0 proven. 875 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2021-10-11 00:23:33,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590055342] [2021-10-11 00:23:33,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565541538] [2021-10-11 00:23:33,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:34,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-11 00:23:34,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:23:34,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:23:34,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:23:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 1055 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 695 trivial. 0 not checked. [2021-10-11 00:23:34,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-11 00:23:34,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 13 [2021-10-11 00:23:34,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758330149] [2021-10-11 00:23:34,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:23:34,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:23:34,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:23:34,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:23:34,255 INFO L87 Difference]: Start difference. First operand 81 states and 86 transitions. Second operand 8 states. [2021-10-11 00:23:34,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:23:34,285 INFO L93 Difference]: Finished difference Result 81 states and 86 transitions. [2021-10-11 00:23:34,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:23:34,286 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 80 [2021-10-11 00:23:34,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:23:34,287 INFO L225 Difference]: With dead ends: 81 [2021-10-11 00:23:34,287 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:23:34,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-11 00:23:34,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:23:34,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:23:34,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:23:34,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:23:34,288 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2021-10-11 00:23:34,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:23:34,289 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:23:34,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:23:34,289 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:23:34,289 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:23:34,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:23:34,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:23:34,633 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:23:34,634 INFO L262 CegarLoopResult]: For program point L25-1(lines 25 27) no Hoare annotation was computed. [2021-10-11 00:23:34,634 INFO L262 CegarLoopResult]: For program point L21-2(lines 21 23) no Hoare annotation was computed. [2021-10-11 00:23:34,634 INFO L258 CegarLoopResult]: At program point L21-3(lines 21 23) the Hoare annotation is: (and (< ULTIMATE.start_main_~b~0 7) (<= ULTIMATE.start_main_~a~0 5)) [2021-10-11 00:23:34,634 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:23:34,634 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:23:34,634 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:23:34,635 INFO L265 CegarLoopResult]: At program point L28(lines 15 29) the Hoare annotation is: true [2021-10-11 00:23:34,635 INFO L262 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2021-10-11 00:23:34,635 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 26) no Hoare annotation was computed. [2021-10-11 00:23:34,635 INFO L262 CegarLoopResult]: For program point L20-2(lines 20 24) no Hoare annotation was computed. [2021-10-11 00:23:34,635 INFO L258 CegarLoopResult]: At program point L20-3(lines 20 24) the Hoare annotation is: (and (<= ULTIMATE.start_main_~a~0 6) (< ULTIMATE.start_main_~b~0 7) (<= 6 ULTIMATE.start_main_~b~0)) [2021-10-11 00:23:34,635 INFO L262 CegarLoopResult]: For program point L20-4(lines 15 29) no Hoare annotation was computed. [2021-10-11 00:23:34,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:23:34 BoogieIcfgContainer [2021-10-11 00:23:34,652 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:23:34,652 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:23:34,652 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:23:34,653 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:23:34,653 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:23:29" (3/4) ... [2021-10-11 00:23:34,657 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:23:34,672 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-11 00:23:34,673 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 00:23:34,673 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:23:34,673 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:23:34,703 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a40016ed-2839-4c6e-8566-6883ed940b8a/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:23:34,703 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:23:34,705 INFO L168 Benchmark]: Toolchain (without parser) took 6040.57 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 73.1 MB in the beginning and 55.1 MB in the end (delta: 18.0 MB). Peak memory consumption was 46.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,705 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 104.9 MB. Free memory was 59.0 MB in the beginning and 58.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:34,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.81 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 80.6 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,706 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.53 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,707 INFO L168 Benchmark]: Boogie Preprocessor took 21.31 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 78.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:23:34,707 INFO L168 Benchmark]: RCFGBuilder took 245.98 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 67.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,708 INFO L168 Benchmark]: TraceAbstraction took 5431.33 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 66.7 MB in the beginning and 57.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,709 INFO L168 Benchmark]: Witness Printer took 50.63 ms. Allocated memory is still 134.2 MB. Free memory was 57.2 MB in the beginning and 55.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:23:34,711 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 104.9 MB. Free memory was 59.0 MB in the beginning and 58.9 MB in the end (delta: 77.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.81 ms. Allocated memory is still 104.9 MB. Free memory was 72.8 MB in the beginning and 80.6 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.53 ms. Allocated memory is still 104.9 MB. Free memory was 80.6 MB in the beginning and 79.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.31 ms. Allocated memory is still 104.9 MB. Free memory was 79.3 MB in the beginning and 78.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 245.98 ms. Allocated memory is still 104.9 MB. Free memory was 78.2 MB in the beginning and 67.1 MB in the end (delta: 11.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5431.33 ms. Allocated memory was 104.9 MB in the beginning and 134.2 MB in the end (delta: 29.4 MB). Free memory was 66.7 MB in the beginning and 57.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 39.6 MB. Max. memory is 16.1 GB. * Witness Printer took 50.63 ms. Allocated memory is still 134.2 MB. Free memory was 57.2 MB in the beginning and 55.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 26]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: (a <= 6 && b < 7) && 6 <= b - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: b < 7 && a <= 5 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.2s, OverallIterations: 11, TraceHistogramMax: 30, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 98 SDslu, 159 SDs, 0 SdLazy, 218 SolverSat, 22 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 393 GetRequests, 332 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=81occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 62 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 45 NumberOfFragments, 18 HoareAnnotationTreeSize, 3 FomulaSimplifications, 1545 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 62 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 679 NumberOfCodeBlocks, 604 NumberOfCodeBlocksAsserted, 57 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 81577 SizeOfPredicates, 2 NumberOfNonLiveVariables, 634 ConjunctsInSsa, 47 ConjunctsInUnsatCore, 20 InterpolantComputations, 3 PerfectInterpolantSequences, 2269/5009 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...