./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 992b306a3a5a9eaa476c1e842c528615cb39ce06 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 00:32:18,432 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:32:18,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:32:18,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:32:18,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:32:18,467 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:32:18,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:32:18,472 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:32:18,474 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:32:18,476 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:32:18,477 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:32:18,479 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:32:18,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:32:18,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:32:18,483 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:32:18,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:32:18,486 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:32:18,487 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:32:18,490 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:32:18,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:32:18,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:32:18,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:32:18,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:32:18,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:32:18,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:32:18,504 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:32:18,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:32:18,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:32:18,506 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:32:18,508 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:32:18,508 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:32:18,509 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:32:18,510 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:32:18,511 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:32:18,513 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:32:18,513 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:32:18,514 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:32:18,514 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:32:18,515 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:32:18,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:32:18,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:32:18,518 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:32:18,547 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:32:18,548 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:32:18,549 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:32:18,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:32:18,550 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:32:18,550 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:32:18,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:32:18,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:32:18,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:32:18,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:32:18,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:32:18,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:32:18,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:32:18,552 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:32:18,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:32:18,552 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:32:18,553 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:32:18,553 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:32:18,553 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:32:18,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:32:18,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:32:18,554 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:32:18,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:32:18,554 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:32:18,555 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:32:18,555 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:32:18,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:32:18,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:32:18,555 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 992b306a3a5a9eaa476c1e842c528615cb39ce06 [2021-10-11 00:32:18,814 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:32:18,835 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:32:18,838 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:32:18,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:32:18,840 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:32:18,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-11 00:32:18,923 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/data/e6ad16db2/82cbb5d31a4a4feea0eec2afde602f11/FLAG3516e99b2 [2021-10-11 00:32:19,335 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:32:19,335 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c [2021-10-11 00:32:19,349 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/data/e6ad16db2/82cbb5d31a4a4feea0eec2afde602f11/FLAG3516e99b2 [2021-10-11 00:32:19,748 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/data/e6ad16db2/82cbb5d31a4a4feea0eec2afde602f11 [2021-10-11 00:32:19,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:32:19,752 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:32:19,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:32:19,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:32:19,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:32:19,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:32:19" (1/1) ... [2021-10-11 00:32:19,761 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9d783c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:19, skipping insertion in model container [2021-10-11 00:32:19,761 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:32:19" (1/1) ... [2021-10-11 00:32:19,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:32:19,800 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:32:19,941 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-11 00:32:19,951 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:32:19,958 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:32:19,995 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/sv-benchmarks/c/loop-acceleration/underapprox_1-2.c[327,340] [2021-10-11 00:32:20,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:32:20,020 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:32:20,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20 WrapperNode [2021-10-11 00:32:20,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:32:20,021 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:32:20,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:32:20,022 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:32:20,029 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,036 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,053 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:32:20,054 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:32:20,054 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:32:20,054 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:32:20,062 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,063 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,064 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,064 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,068 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,072 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... [2021-10-11 00:32:20,074 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:32:20,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:32:20,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:32:20,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:32:20,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:32:20,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:32:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:32:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:32:20,362 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:32:20,363 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:32:20,364 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:20 BoogieIcfgContainer [2021-10-11 00:32:20,365 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:32:20,366 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:32:20,366 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:32:20,370 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:32:20,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:32:19" (1/3) ... [2021-10-11 00:32:20,371 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58945362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:32:20, skipping insertion in model container [2021-10-11 00:32:20,371 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:32:20" (2/3) ... [2021-10-11 00:32:20,372 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58945362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:32:20, skipping insertion in model container [2021-10-11 00:32:20,372 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:20" (3/3) ... [2021-10-11 00:32:20,373 INFO L111 eAbstractionObserver]: Analyzing ICFG underapprox_1-2.c [2021-10-11 00:32:20,387 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:32:20,390 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:32:20,401 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:32:20,437 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:32:20,437 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:32:20,437 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:32:20,437 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:32:20,437 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:32:20,437 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:32:20,437 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:32:20,438 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:32:20,455 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-10-11 00:32:20,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:32:20,467 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:20,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:32:20,468 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:20,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:20,475 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-10-11 00:32:20,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:20,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666882099] [2021-10-11 00:32:20,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:20,658 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 00:32:20,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666882099] [2021-10-11 00:32:20,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:32:20,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-11 00:32:20,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441928509] [2021-10-11 00:32:20,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-10-11 00:32:20,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:20,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-11 00:32:20,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:32:20,679 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 3 states. [2021-10-11 00:32:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:20,702 INFO L93 Difference]: Finished difference Result 18 states and 22 transitions. [2021-10-11 00:32:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-11 00:32:20,704 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-10-11 00:32:20,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:20,711 INFO L225 Difference]: With dead ends: 18 [2021-10-11 00:32:20,711 INFO L226 Difference]: Without dead ends: 8 [2021-10-11 00:32:20,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-11 00:32:20,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-11 00:32:20,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-11 00:32:20,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-10-11 00:32:20,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-11 00:32:20,752 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-10-11 00:32:20,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:20,752 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-11 00:32:20,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-10-11 00:32:20,753 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-11 00:32:20,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-11 00:32:20,754 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:20,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:20,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:32:20,755 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:20,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:20,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-10-11 00:32:20,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:20,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387123046] [2021-10-11 00:32:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:20,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:20,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387123046] [2021-10-11 00:32:20,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472643112] [2021-10-11 00:32:20,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:21,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:21,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-11 00:32:21,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:21,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:21,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:21,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-10-11 00:32:21,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238253410] [2021-10-11 00:32:21,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-10-11 00:32:21,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:21,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-11 00:32:21,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:32:21,106 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 5 states. [2021-10-11 00:32:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:21,131 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-11 00:32:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:32:21,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2021-10-11 00:32:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:21,133 INFO L225 Difference]: With dead ends: 13 [2021-10-11 00:32:21,133 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 00:32:21,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:32:21,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 00:32:21,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 00:32:21,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 00:32:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-11 00:32:21,139 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-11 00:32:21,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:21,140 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-11 00:32:21,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-10-11 00:32:21,140 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-11 00:32:21,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-11 00:32:21,142 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:21,142 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:21,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-11 00:32:21,360 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:21,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:21,361 INFO L82 PathProgramCache]: Analyzing trace with hash 292915403, now seen corresponding path program 2 times [2021-10-11 00:32:21,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:21,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358416944] [2021-10-11 00:32:21,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:21,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:21,514 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:21,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358416944] [2021-10-11 00:32:21,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859470217] [2021-10-11 00:32:21,515 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:21,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:32:21,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:32:21,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:32:21,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:21,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:21,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:21,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-10-11 00:32:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208654709] [2021-10-11 00:32:21,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-10-11 00:32:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:21,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-11 00:32:21,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:32:21,704 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 6 states. [2021-10-11 00:32:21,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:21,742 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-11 00:32:21,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:32:21,742 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2021-10-11 00:32:21,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:21,743 INFO L225 Difference]: With dead ends: 14 [2021-10-11 00:32:21,743 INFO L226 Difference]: Without dead ends: 10 [2021-10-11 00:32:21,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-10-11 00:32:21,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-11 00:32:21,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-11 00:32:21,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-10-11 00:32:21,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-11 00:32:21,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-10-11 00:32:21,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:21,747 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-11 00:32:21,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-10-11 00:32:21,747 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-11 00:32:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 00:32:21,747 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:21,748 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:21,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:32:21,976 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:21,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:21,976 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 3 times [2021-10-11 00:32:21,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:21,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765004407] [2021-10-11 00:32:21,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:21,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:22,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765004407] [2021-10-11 00:32:22,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984240662] [2021-10-11 00:32:22,109 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:22,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-11 00:32:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:32:22,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-11 00:32:22,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:22,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:22,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-10-11 00:32:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073667399] [2021-10-11 00:32:22,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:32:22,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:22,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:32:22,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:32:22,257 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 7 states. [2021-10-11 00:32:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:22,303 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-11 00:32:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:32:22,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-10-11 00:32:22,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:22,305 INFO L225 Difference]: With dead ends: 15 [2021-10-11 00:32:22,305 INFO L226 Difference]: Without dead ends: 11 [2021-10-11 00:32:22,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:32:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-11 00:32:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-11 00:32:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 00:32:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-11 00:32:22,313 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-10-11 00:32:22,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:22,314 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-11 00:32:22,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:32:22,314 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-11 00:32:22,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-11 00:32:22,314 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:22,314 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:22,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:32:22,528 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:22,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:22,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 4 times [2021-10-11 00:32:22,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:22,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252709536] [2021-10-11 00:32:22,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:22,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:22,718 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:22,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252709536] [2021-10-11 00:32:22,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011504829] [2021-10-11 00:32:22,719 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:22,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:32:22,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:32:22,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-11 00:32:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:22,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:22,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-10-11 00:32:22,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022191899] [2021-10-11 00:32:22,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:32:22,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:22,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:32:22,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:32:22,869 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 8 states. [2021-10-11 00:32:22,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:22,927 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-11 00:32:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:32:22,928 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2021-10-11 00:32:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:22,929 INFO L225 Difference]: With dead ends: 16 [2021-10-11 00:32:22,929 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:32:22,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:32:22,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:32:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-11 00:32:22,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-10-11 00:32:22,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-11 00:32:22,939 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-10-11 00:32:22,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:22,940 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-11 00:32:22,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:32:22,940 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-11 00:32:22,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-11 00:32:22,941 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:22,941 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:23,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:32:23,168 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:23,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:23,168 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 5 times [2021-10-11 00:32:23,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:23,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492204875] [2021-10-11 00:32:23,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:23,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492204875] [2021-10-11 00:32:23,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115563556] [2021-10-11 00:32:23,356 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:23,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-11 00:32:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:32:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 00:32:23,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:23,564 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:23,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:23,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-10-11 00:32:23,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635578923] [2021-10-11 00:32:23,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:32:23,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:23,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:32:23,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:32:23,569 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 9 states. [2021-10-11 00:32:23,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:23,638 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-11 00:32:23,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:32:23,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2021-10-11 00:32:23,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:23,641 INFO L225 Difference]: With dead ends: 17 [2021-10-11 00:32:23,641 INFO L226 Difference]: Without dead ends: 13 [2021-10-11 00:32:23,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:32:23,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-11 00:32:23,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-11 00:32:23,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-10-11 00:32:23,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-11 00:32:23,646 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-10-11 00:32:23,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:23,646 INFO L481 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-11 00:32:23,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:32:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-11 00:32:23,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:32:23,647 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:23,647 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:23,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-11 00:32:23,850 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:23,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:23,850 INFO L82 PathProgramCache]: Analyzing trace with hash -967103989, now seen corresponding path program 6 times [2021-10-11 00:32:23,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:23,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737304607] [2021-10-11 00:32:23,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:24,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737304607] [2021-10-11 00:32:24,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404219353] [2021-10-11 00:32:24,257 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_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:24,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-11 00:32:24,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:32:24,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-11 00:32:24,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:24,595 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-11 00:32:24,630 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 00:32:24,888 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-11 00:32:24,997 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-10-11 00:32:25,292 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:32:25,644 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 00:32:26,167 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-10-11 00:32:26,645 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-10-11 00:32:28,730 WARN L197 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 92 [2021-10-11 00:32:28,887 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:32:28,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:28,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-10-11 00:32:28,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891466426] [2021-10-11 00:32:28,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-10-11 00:32:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:28,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-11 00:32:28,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-10-11 00:32:28,890 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 12 states. [2021-10-11 00:32:29,592 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2021-10-11 00:32:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:31,713 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-11 00:32:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-11 00:32:31,713 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 12 [2021-10-11 00:32:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:31,714 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:32:31,714 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 00:32:31,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-11 00:32:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 00:32:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-11 00:32:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-10-11 00:32:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-11 00:32:31,718 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-10-11 00:32:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:31,718 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-11 00:32:31,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-10-11 00:32:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-11 00:32:31,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-11 00:32:31,719 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:32:31,719 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1] [2021-10-11 00:32:31,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:32:31,939 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:32:31,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:32:31,940 INFO L82 PathProgramCache]: Analyzing trace with hash -1620705621, now seen corresponding path program 7 times [2021-10-11 00:32:31,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:32:31,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682093877] [2021-10-11 00:32:31,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:32:31,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:32,114 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:32:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682093877] [2021-10-11 00:32:32,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750504971] [2021-10-11 00:32:32,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/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 00:32:32,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:32:32,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-11 00:32:32,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:32:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-11 00:32:32,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:32:32,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-10-11 00:32:32,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95201909] [2021-10-11 00:32:32,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:32:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:32:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:32:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:32:32,267 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 10 states. [2021-10-11 00:32:32,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:32:32,332 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-11 00:32:32,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-11 00:32:32,333 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-10-11 00:32:32,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:32:32,334 INFO L225 Difference]: With dead ends: 15 [2021-10-11 00:32:32,334 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:32:32,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:32:32,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:32:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:32:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:32:32,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:32:32,335 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-10-11 00:32:32,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:32:32,336 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:32:32,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:32:32,336 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:32:32,336 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:32:32,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:32:32,554 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:32:32,807 WARN L197 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 94 [2021-10-11 00:32:32,811 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:32:32,812 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-11 00:32:32,812 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:32:32,812 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:32:32,812 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:32:32,812 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-11 00:32:32,813 INFO L258 CegarLoopResult]: At program point L16-2(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ ULTIMATE.start_main_~y~0 1))) (or (and (= ULTIMATE.start_main_~x~0 0) (= ULTIMATE.start_main_~y~0 1)) (and (<= 3 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~y~0 8) (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 178956971) 178956968) 536870912))) (<= ULTIMATE.start_main_~x~0 3)) (and (<= 1 (+ (* 3 (div (+ (* ULTIMATE.start_main_~y~0 (- 89478485)) 89478484) 268435456)) ULTIMATE.start_main_~y~0)) (<= 2 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 2) (<= ULTIMATE.start_main_~y~0 4)) (and (<= 4 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 4) (<= ULTIMATE.start_main_~y~0 16) (<= 1 (+ (* 3 (div (+ (* ULTIMATE.start_main_~y~0 (- 357913941)) 357913936) 1073741824)) ULTIMATE.start_main_~y~0))) (and (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 715827883) 715827872) 2147483648))) (<= ULTIMATE.start_main_~y~0 32) (<= 5 ULTIMATE.start_main_~x~0) (<= ULTIMATE.start_main_~x~0 5)) (and (= ULTIMATE.start_main_~x~0 1) (<= .cse0 (* 3 (div (+ (* ULTIMATE.start_main_~y~0 44739243) 44739242) 134217728))) (<= ULTIMATE.start_main_~y~0 2)) (let ((.cse1 (div (* ULTIMATE.start_main_~y~0 (- 1)) (- 2)))) (and (<= ULTIMATE.start_main_~x~0 6) (<= 6 ULTIMATE.start_main_~x~0) (<= (+ .cse1 1) (* 3 (div (+ (* .cse1 715827883) 715827872) 2147483648))) (= 0 (mod ULTIMATE.start_main_~y~0 (- 2))) (<= .cse1 32))))) [2021-10-11 00:32:32,813 INFO L262 CegarLoopResult]: For program point L16-3(lines 16 19) no Hoare annotation was computed. [2021-10-11 00:32:32,813 INFO L262 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-11 00:32:32,813 INFO L265 CegarLoopResult]: At program point L6-2(lines 1 22) the Hoare annotation is: true [2021-10-11 00:32:32,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:32:32 BoogieIcfgContainer [2021-10-11 00:32:32,845 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:32:32,846 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:32:32,847 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:32:32,847 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:32:32,847 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:32:20" (3/4) ... [2021-10-11 00:32:32,851 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:32:32,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 00:32:32,860 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 00:32:32,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:32:32,861 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:32:32,913 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_805cf402-2393-4a6d-9cfa-622e1ef1a37a/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:32:32,913 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:32:32,915 INFO L168 Benchmark]: Toolchain (without parser) took 13162.19 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 64.0 MB in the beginning and 61.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 86.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:32,916 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:32,916 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.59 ms. Allocated memory is still 96.5 MB. Free memory was 63.6 MB in the beginning and 74.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:32,917 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.00 ms. Allocated memory is still 96.5 MB. Free memory was 74.3 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:32,917 INFO L168 Benchmark]: Boogie Preprocessor took 19.95 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 71.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:32,922 INFO L168 Benchmark]: RCFGBuilder took 290.36 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 60.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:32,923 INFO L168 Benchmark]: TraceAbstraction took 12478.91 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 60.4 MB in the beginning and 63.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 84.9 MB. Max. memory is 16.1 GB. [2021-10-11 00:32:32,924 INFO L168 Benchmark]: Witness Printer took 67.38 ms. Allocated memory is still 182.5 MB. Free memory was 63.9 MB in the beginning and 61.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:32:32,926 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 79.7 MB. Free memory was 59.9 MB in the beginning and 59.9 MB in the end (delta: 27.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.59 ms. Allocated memory is still 96.5 MB. Free memory was 63.6 MB in the beginning and 74.3 MB in the end (delta: -10.7 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.00 ms. Allocated memory is still 96.5 MB. Free memory was 74.3 MB in the beginning and 73.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 19.95 ms. Allocated memory is still 96.5 MB. Free memory was 73.0 MB in the beginning and 71.7 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 290.36 ms. Allocated memory is still 96.5 MB. Free memory was 71.7 MB in the beginning and 60.9 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 12478.91 ms. Allocated memory was 96.5 MB in the beginning and 182.5 MB in the end (delta: 86.0 MB). Free memory was 60.4 MB in the beginning and 63.9 MB in the end (delta: -3.6 MB). Peak memory consumption was 84.9 MB. Max. memory is 16.1 GB. * Witness Printer took 67.38 ms. Allocated memory is still 182.5 MB. Free memory was 63.9 MB in the beginning and 61.9 MB in the end (delta: 2.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: 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: 16]: Loop Invariant Derived loop invariant: ((((((x == 0 && y == 1) || (((3 <= x && y <= 8) && y + 1 <= 3 * ((y * 178956971 + 178956968) / 536870912)) && x <= 3)) || (((1 <= 3 * ((y * -89478485 + 89478484) / 268435456) + y && 2 <= x) && x <= 2) && y <= 4)) || (((4 <= x && x <= 4) && y <= 16) && 1 <= 3 * ((y * -357913941 + 357913936) / 1073741824) + y)) || (((y + 1 <= 3 * ((y * 715827883 + 715827872) / 2147483648) && y <= 32) && 5 <= x) && x <= 5)) || ((x == 1 && y + 1 <= 3 * ((y * 44739243 + 44739242) / 134217728)) && y <= 2)) || ((((x <= 6 && 6 <= x) && y * -1 / -2 + 1 <= 3 * ((y * -1 / -2 * 715827883 + 715827872) / 2147483648)) && 0 == y % -2) && y * -1 / -2 <= 32) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 10 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.1s, OverallIterations: 8, TraceHistogramMax: 8, AutomataDifference: 3.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 2 SDslu, 127 SDs, 0 SdLazy, 260 SolverSat, 22 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 2.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 56 SyntacticMatches, 16 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=15occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 10 NumberOfFragments, 161 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 6 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.3s InterpolantComputationTime, 148 NumberOfCodeBlocks, 148 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 133 ConstructedInterpolants, 1 QuantifiedInterpolants, 9810 SizeOfPredicates, 8 NumberOfNonLiveVariables, 446 ConjunctsInSsa, 86 ConjunctsInUnsatCore, 15 InterpolantComputations, 1 PerfectInterpolantSequences, 30/184 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...