./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/bAnd5.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt --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 a13961418fec0d16c53db1d204e2c00858b0a3a5 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/bAnd5.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt --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 a13961418fec0d16c53db1d204e2c00858b0a3a5 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 01:13:15,357 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 01:13:15,361 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 01:13:15,438 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 01:13:15,440 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 01:13:15,443 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 01:13:15,447 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 01:13:15,455 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 01:13:15,460 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 01:13:15,462 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 01:13:15,463 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 01:13:15,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 01:13:15,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 01:13:15,475 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 01:13:15,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 01:13:15,479 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 01:13:15,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 01:13:15,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 01:13:15,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 01:13:15,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 01:13:15,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 01:13:15,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 01:13:15,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 01:13:15,500 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 01:13:15,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 01:13:15,519 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 01:13:15,519 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 01:13:15,521 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 01:13:15,522 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 01:13:15,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 01:13:15,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 01:13:15,528 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 01:13:15,531 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 01:13:15,533 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 01:13:15,535 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 01:13:15,536 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 01:13:15,537 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 01:13:15,537 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 01:13:15,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 01:13:15,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 01:13:15,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 01:13:15,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 01:13:15,603 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 01:13:15,603 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 01:13:15,604 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 01:13:15,605 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 01:13:15,608 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 01:13:15,608 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 01:13:15,608 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 01:13:15,609 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 01:13:15,609 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 01:13:15,609 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 01:13:15,611 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 01:13:15,612 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 01:13:15,612 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 01:13:15,613 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 01:13:15,613 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 01:13:15,613 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 01:13:15,614 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 01:13:15,614 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 01:13:15,614 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 01:13:15,615 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 01:13:15,615 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 01:13:15,615 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 01:13:15,616 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:13:15,616 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 01:13:15,616 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 01:13:15,616 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 01:13:15,617 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 01:13:15,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 01:13:15,617 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 01:13:15,620 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 01:13:15,621 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_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a13961418fec0d16c53db1d204e2c00858b0a3a5 [2021-10-13 01:13:15,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:13:15,988 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:13:15,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:13:15,993 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:13:15,994 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:13:15,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 01:13:16,092 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/9f667a72d/e1d0ba0cb1584f5cb6a5e916e7e6040f/FLAGcf6f1fc96 [2021-10-13 01:13:16,841 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:13:16,842 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 01:13:16,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/9f667a72d/e1d0ba0cb1584f5cb6a5e916e7e6040f/FLAGcf6f1fc96 [2021-10-13 01:13:16,887 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/9f667a72d/e1d0ba0cb1584f5cb6a5e916e7e6040f [2021-10-13 01:13:16,890 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:13:16,895 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:13:16,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:16,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:13:16,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:13:16,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:16" (1/1) ... [2021-10-13 01:13:16,906 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f3028d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:16, skipping insertion in model container [2021-10-13 01:13:16,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:16" (1/1) ... [2021-10-13 01:13:16,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:13:16,941 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:13:17,228 WARN L228 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_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 01:13:17,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:17,241 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:13:17,270 WARN L228 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_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 01:13:17,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:17,290 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:13:17,291 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17 WrapperNode [2021-10-13 01:13:17,291 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:17,292 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:13:17,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:13:17,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:13:17,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,344 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:13:17,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:13:17,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:13:17,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:13:17,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,360 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,371 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,377 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,383 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:13:17,384 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:13:17,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:13:17,385 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:13:17,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (1/1) ... [2021-10-13 01:13:17,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:13:17,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:17,445 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:17,454 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:13:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 01:13:17,501 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:13:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 01:13:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:13:17,505 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:13:17,505 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 01:13:17,506 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:13:17,931 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:13:17,931 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 01:13:17,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:17 BoogieIcfgContainer [2021-10-13 01:13:17,934 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:13:17,936 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:13:17,937 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:13:17,941 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:13:17,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:13:16" (1/3) ... [2021-10-13 01:13:17,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d297309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:17, skipping insertion in model container [2021-10-13 01:13:17,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:17" (2/3) ... [2021-10-13 01:13:17,944 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d297309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:17, skipping insertion in model container [2021-10-13 01:13:17,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:17" (3/3) ... [2021-10-13 01:13:17,946 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-13 01:13:17,953 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:13:17,954 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 01:13:18,045 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:13:18,054 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:13:18,064 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 01:13:18,084 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:13:18,092 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:18,093 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:18,093 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:18,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:18,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-10-13 01:13:18,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:18,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161841911] [2021-10-13 01:13:18,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:18,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:18,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161841911] [2021-10-13 01:13:18,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161841911] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:18,319 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:18,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 01:13:18,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081788715] [2021-10-13 01:13:18,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 01:13:18,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 01:13:18,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:13:18,349 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:18,369 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-10-13 01:13:18,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 01:13:18,371 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 01:13:18,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:18,381 INFO L225 Difference]: With dead ends: 53 [2021-10-13 01:13:18,382 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 01:13:18,385 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:13:18,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 01:13:18,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 01:13:18,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-13 01:13:18,427 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-10-13 01:13:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-13 01:13:18,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-13 01:13:18,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:13:18,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:18,430 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:18,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 01:13:18,431 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:18,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:18,432 INFO L82 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-10-13 01:13:18,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:18,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131425268] [2021-10-13 01:13:18,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:18,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:18,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:18,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131425268] [2021-10-13 01:13:18,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131425268] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:18,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:18,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 01:13:18,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141812041] [2021-10-13 01:13:18,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 01:13:18,539 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:18,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 01:13:18,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:13:18,541 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:18,624 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2021-10-13 01:13:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 01:13:18,625 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 01:13:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:18,626 INFO L225 Difference]: With dead ends: 45 [2021-10-13 01:13:18,627 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 01:13:18,628 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 01:13:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 01:13:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-10-13 01:13:18,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-10-13 01:13:18,635 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 18 [2021-10-13 01:13:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:18,636 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-10-13 01:13:18,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-10-13 01:13:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 01:13:18,637 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:18,638 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:18,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 01:13:18,638 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:18,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:18,639 INFO L82 PathProgramCache]: Analyzing trace with hash 2143387046, now seen corresponding path program 1 times [2021-10-13 01:13:18,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:18,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607123990] [2021-10-13 01:13:18,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,641 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:18,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:18,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 01:13:18,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:18,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607123990] [2021-10-13 01:13:18,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607123990] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:18,794 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:18,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:18,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743662110] [2021-10-13 01:13:18,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:18,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:18,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:18,803 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:18,876 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2021-10-13 01:13:18,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:13:18,876 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-13 01:13:18,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:18,878 INFO L225 Difference]: With dead ends: 47 [2021-10-13 01:13:18,878 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 01:13:18,878 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:18,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 01:13:18,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-10-13 01:13:18,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-10-13 01:13:18,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2021-10-13 01:13:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:18,886 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-10-13 01:13:18,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-10-13 01:13:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 01:13:18,887 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:18,887 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:18,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 01:13:18,888 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:18,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:18,889 INFO L82 PathProgramCache]: Analyzing trace with hash 46775620, now seen corresponding path program 1 times [2021-10-13 01:13:18,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:18,889 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933472472] [2021-10-13 01:13:18,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:18,890 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:18,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:19,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:19,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933472472] [2021-10-13 01:13:19,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933472472] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:19,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:19,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-13 01:13:19,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525356915] [2021-10-13 01:13:19,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:19,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:19,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:19,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:19,065 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:19,164 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-10-13 01:13:19,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:13:19,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-13 01:13:19,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:19,168 INFO L225 Difference]: With dead ends: 39 [2021-10-13 01:13:19,168 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 01:13:19,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:19,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 01:13:19,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-10-13 01:13:19,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-10-13 01:13:19,176 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 26 [2021-10-13 01:13:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:19,181 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-10-13 01:13:19,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-10-13 01:13:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:13:19,182 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:19,183 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:19,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 01:13:19,183 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:19,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:19,184 INFO L82 PathProgramCache]: Analyzing trace with hash -548779230, now seen corresponding path program 1 times [2021-10-13 01:13:19,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:19,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742492830] [2021-10-13 01:13:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:19,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:19,350 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:19,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 01:13:19,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742492830] [2021-10-13 01:13:19,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742492830] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:19,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143397004] [2021-10-13 01:13:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:19,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:19,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:19,356 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:19,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 01:13:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:19,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 01:13:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:13:19,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143397004] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 01:13:19,746 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:19,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-13 01:13:19,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91065439] [2021-10-13 01:13:19,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 01:13:19,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 01:13:19,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 01:13:19,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:19,749 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:19,831 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2021-10-13 01:13:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 01:13:19,832 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 01:13:19,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:19,833 INFO L225 Difference]: With dead ends: 55 [2021-10-13 01:13:19,834 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 01:13:19,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.7ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 01:13:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 01:13:19,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-10-13 01:13:19,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-13 01:13:19,846 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-10-13 01:13:19,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:19,846 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-13 01:13:19,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:19,847 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-13 01:13:19,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:13:19,849 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:19,849 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:19,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:20,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:20,063 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:20,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:20,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 2 times [2021-10-13 01:13:20,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 01:13:20,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651810896] [2021-10-13 01:13:20,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:20,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 01:13:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:20,183 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 01:13:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 01:13:20,298 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-13 01:13:20,298 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 01:13:20,299 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:13:20,301 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-13 01:13:20,314 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:13:20,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:13:20 BoogieIcfgContainer [2021-10-13 01:13:20,410 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:13:20,411 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:13:20,411 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:13:20,411 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:13:20,412 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:17" (3/4) ... [2021-10-13 01:13:20,420 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:13:20,420 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:13:20,428 INFO L168 Benchmark]: Toolchain (without parser) took 3525.79 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 66.1 MB in the beginning and 74.5 MB in the end (delta: -8.5 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:20,430 INFO L168 Benchmark]: CDTParser took 0.36 ms. Allocated memory is still 100.7 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:20,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 394.00 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 66.1 MB in the beginning and 106.9 MB in the end (delta: -40.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:20,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 51.69 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 104.9 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:20,432 INFO L168 Benchmark]: Boogie Preprocessor took 38.36 ms. Allocated memory is still 134.2 MB. Free memory was 104.9 MB in the beginning and 103.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:20,433 INFO L168 Benchmark]: RCFGBuilder took 549.71 ms. Allocated memory is still 134.2 MB. Free memory was 103.5 MB in the beginning and 91.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:20,438 INFO L168 Benchmark]: TraceAbstraction took 2473.67 ms. Allocated memory is still 134.2 MB. Free memory was 91.8 MB in the beginning and 75.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:13:20,439 INFO L168 Benchmark]: Witness Printer took 9.20 ms. Allocated memory is still 134.2 MB. Free memory was 75.3 MB in the beginning and 74.5 MB in the end (delta: 805.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:13:20,447 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.36 ms. Allocated memory is still 100.7 MB. Free memory is still 53.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 394.00 ms. Allocated memory was 100.7 MB in the beginning and 134.2 MB in the end (delta: 33.6 MB). Free memory was 66.1 MB in the beginning and 106.9 MB in the end (delta: -40.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 51.69 ms. Allocated memory is still 134.2 MB. Free memory was 106.9 MB in the beginning and 104.9 MB in the end (delta: 2.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 38.36 ms. Allocated memory is still 134.2 MB. Free memory was 104.9 MB in the beginning and 103.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 549.71 ms. Allocated memory is still 134.2 MB. Free memory was 103.5 MB in the beginning and 91.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2473.67 ms. Allocated memory is still 134.2 MB. Free memory was 91.8 MB in the beginning and 75.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.1 GB. * Witness Printer took 9.20 ms. Allocated memory is still 134.2 MB. Free memory was 75.3 MB in the beginning and 74.5 MB in the end (delta: 805.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseAnd at line 25. Possible FailurePath: [L17] int N; VAL [N=0] [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ VAL [N=2] [L40] COND FALSE !(i < N) VAL [N=2] [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 VAL [N=2] [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ VAL [N=2] [L24] COND FALSE !(i < N) VAL [N=2] [L27] return res; VAL [N=2] [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; VAL [N=2] [L50] COND TRUE i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt 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 -> a13961418fec0d16c53db1d204e2c00858b0a3a5 [2021-10-13 01:13:24,422 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 01:13:24,471 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 01:13:24,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 01:13:24,478 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 01:13:24,479 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 01:13:24,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 01:13:24,586 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/12de712eb/f95252dfe36043729d69b156779fbacc/FLAGfd4c19652 [2021-10-13 01:13:25,376 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 01:13:25,381 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i [2021-10-13 01:13:25,391 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/12de712eb/f95252dfe36043729d69b156779fbacc/FLAGfd4c19652 [2021-10-13 01:13:25,707 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/data/12de712eb/f95252dfe36043729d69b156779fbacc [2021-10-13 01:13:25,711 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 01:13:25,713 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 01:13:25,715 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:25,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 01:13:25,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 01:13:25,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:25" (1/1) ... [2021-10-13 01:13:25,724 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4693e8ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:25, skipping insertion in model container [2021-10-13 01:13:25,724 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:13:25" (1/1) ... [2021-10-13 01:13:25,734 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 01:13:25,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 01:13:25,988 WARN L228 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_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 01:13:25,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:26,006 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 01:13:26,086 WARN L228 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_668ab741-94bb-4e6b-8374-bcf14838411a/sv-benchmarks/c/array-crafted/bAnd5.i[1369,1382] [2021-10-13 01:13:26,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 01:13:26,106 INFO L208 MainTranslator]: Completed translation [2021-10-13 01:13:26,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26 WrapperNode [2021-10-13 01:13:26,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 01:13:26,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 01:13:26,109 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 01:13:26,109 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 01:13:26,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,133 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,166 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 01:13:26,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 01:13:26,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 01:13:26,168 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 01:13:26,178 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,184 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,202 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,205 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,209 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 01:13:26,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 01:13:26,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 01:13:26,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 01:13:26,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (1/1) ... [2021-10-13 01:13:26,223 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 01:13:26,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:26,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 01:13:26,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 01:13:26,317 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 01:13:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 01:13:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 01:13:26,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 01:13:26,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 01:13:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 01:13:26,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 01:13:26,768 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 01:13:26,768 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 01:13:26,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:26 BoogieIcfgContainer [2021-10-13 01:13:26,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 01:13:26,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 01:13:26,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 01:13:26,777 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 01:13:26,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:13:25" (1/3) ... [2021-10-13 01:13:26,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae4a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:26, skipping insertion in model container [2021-10-13 01:13:26,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:13:26" (2/3) ... [2021-10-13 01:13:26,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ae4a6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:13:26, skipping insertion in model container [2021-10-13 01:13:26,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:26" (3/3) ... [2021-10-13 01:13:26,781 INFO L111 eAbstractionObserver]: Analyzing ICFG bAnd5.i [2021-10-13 01:13:26,789 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 01:13:26,789 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 01:13:26,851 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 01:13:26,860 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 01:13:26,863 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 01:13:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:26,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:13:26,909 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:26,910 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:26,911 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:26,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:26,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1563818866, now seen corresponding path program 1 times [2021-10-13 01:13:26,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:26,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1481569929] [2021-10-13 01:13:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:26,938 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:26,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:26,942 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:26,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 01:13:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 01:13:27,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:27,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:27,340 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:27,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1481569929] [2021-10-13 01:13:27,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1481569929] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:27,342 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:27,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 01:13:27,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057366451] [2021-10-13 01:13:27,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 01:13:27,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:27,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 01:13:27,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:13:27,373 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:27,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:27,401 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2021-10-13 01:13:27,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 01:13:27,403 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 01:13:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:27,413 INFO L225 Difference]: With dead ends: 53 [2021-10-13 01:13:27,414 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 01:13:27,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 01:13:27,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 01:13:27,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 01:13:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-10-13 01:13:27,458 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 18 [2021-10-13 01:13:27,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:27,459 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-10-13 01:13:27,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:27,460 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-10-13 01:13:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 01:13:27,461 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:27,462 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:27,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:27,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:27,682 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:27,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2019195128, now seen corresponding path program 1 times [2021-10-13 01:13:27,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:27,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691248402] [2021-10-13 01:13:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:27,686 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:27,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:27,689 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:27,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 01:13:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:27,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 01:13:27,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:28,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:28,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:28,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:28,148 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:28,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [691248402] [2021-10-13 01:13:28,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [691248402] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 01:13:28,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:13:28,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 01:13:28,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865179618] [2021-10-13 01:13:28,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 01:13:28,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 01:13:28,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:28,158 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:28,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:28,245 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-13 01:13:28,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 01:13:28,248 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-13 01:13:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:28,249 INFO L225 Difference]: With dead ends: 46 [2021-10-13 01:13:28,250 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 01:13:28,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 01:13:28,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 01:13:28,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 01:13:28,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:28,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-10-13 01:13:28,263 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2021-10-13 01:13:28,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:28,268 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-10-13 01:13:28,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:28,270 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-10-13 01:13:28,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 01:13:28,272 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:28,273 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:28,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:28,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:28,490 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:28,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:28,492 INFO L82 PathProgramCache]: Analyzing trace with hash -524663612, now seen corresponding path program 1 times [2021-10-13 01:13:28,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:28,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [800033610] [2021-10-13 01:13:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:28,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:28,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:28,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:28,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 01:13:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:28,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:28,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:29,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:29,329 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:29,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [800033610] [2021-10-13 01:13:29,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [800033610] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:13:29,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:29,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-13 01:13:29,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151498897] [2021-10-13 01:13:29,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:13:29,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:29,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:13:29,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:13:29,334 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:29,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:29,838 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2021-10-13 01:13:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:13:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-13 01:13:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:29,842 INFO L225 Difference]: With dead ends: 74 [2021-10-13 01:13:29,842 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 01:13:29,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 366.2ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:13:29,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 01:13:29,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 30. [2021-10-13 01:13:29,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:29,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-10-13 01:13:29,853 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-10-13 01:13:29,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:29,853 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-10-13 01:13:29,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:29,854 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-10-13 01:13:29,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 01:13:29,855 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:29,855 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:29,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:30,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:30,056 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:30,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:30,057 INFO L82 PathProgramCache]: Analyzing trace with hash -187943454, now seen corresponding path program 1 times [2021-10-13 01:13:30,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:30,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35636734] [2021-10-13 01:13:30,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:30,058 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:30,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:30,059 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:30,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 01:13:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 01:13:30,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:30,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 01:13:30,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 01:13:31,139 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:31,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35636734] [2021-10-13 01:13:31,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35636734] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 01:13:31,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 01:13:31,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-13 01:13:31,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117534687] [2021-10-13 01:13:31,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 01:13:31,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-10-13 01:13:31,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 01:13:31,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-13 01:13:31,147 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:31,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 01:13:31,571 INFO L93 Difference]: Finished difference Result 67 states and 77 transitions. [2021-10-13 01:13:31,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 01:13:31,573 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 01:13:31,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 01:13:31,574 INFO L225 Difference]: With dead ends: 67 [2021-10-13 01:13:31,575 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 01:13:31,575 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 381.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-10-13 01:13:31,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 01:13:31,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 31. [2021-10-13 01:13:31,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:31,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-10-13 01:13:31,585 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-10-13 01:13:31,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 01:13:31,585 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-10-13 01:13:31,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 01:13:31,586 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-10-13 01:13:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 01:13:31,589 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 01:13:31,590 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 01:13:31,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 01:13:31,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 [2021-10-13 01:13:31,805 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 01:13:31,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 01:13:31,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1519457344, now seen corresponding path program 1 times [2021-10-13 01:13:31,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-10-13 01:13:31,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1862237571] [2021-10-13 01:13:31,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:31,808 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 01:13:31,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat [2021-10-13 01:13:31,810 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 01:13:31,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 01:13:32,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:32,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 01:13:32,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:32,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:32,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 01:13:33,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:33,619 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:33,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 01:13:33,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:33,933 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 01:13:33,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 01:13:34,166 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 01:13:34,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 01:13:35,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:35,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:46,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-10-13 01:13:46,982 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:13:46,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-10-13 01:13:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 01:13:47,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:13:47,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-10-13 01:13:47,997 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-10-13 01:13:47,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1862237571] [2021-10-13 01:13:47,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 01:13:47,999 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [926004368] [2021-10-13 01:13:47,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:47,999 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 01:13:48,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/cvc4 [2021-10-13 01:13:48,017 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 01:13:48,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 01:13:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:13:48,421 WARN L261 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 01:13:48,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:13:48,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 01:13:48,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:48,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 01:13:49,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:49,044 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:13:49,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 01:13:49,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:13:49,318 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 01:13:49,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 01:13:49,397 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 01:13:49,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 01:13:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 01:13:49,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:13:57,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 255 treesize of output 223 [2021-10-13 01:13:57,876 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:13:57,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 755 treesize of output 623 [2021-10-13 01:13:59,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 01:13:59,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077897177] [2021-10-13 01:13:59,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 01:13:59,346 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:13:59,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 01:13:59,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 01:13:59,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 01:14:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 01:14:00,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 01:14:00,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 01:14:01,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:01,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 25 [2021-10-13 01:14:01,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:01,782 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 01:14:01,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 36 [2021-10-13 01:14:02,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 01:14:02,041 INFO L354 Elim1Store]: treesize reduction 68, result has 9.3 percent of original size [2021-10-13 01:14:02,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 61 treesize of output 46 [2021-10-13 01:14:02,128 INFO L354 Elim1Store]: treesize reduction 22, result has 12.0 percent of original size [2021-10-13 01:14:02,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 34 [2021-10-13 01:14:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 01:14:02,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 01:14:10,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 111 [2021-10-13 01:14:10,918 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:14:10,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 212 treesize of output 156 [2021-10-13 01:14:10,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 37 [2021-10-13 01:14:10,976 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-10-13 01:14:10,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 1 [2021-10-13 01:14:11,233 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: no int: (_ BitVec 32) [2021-10-13 01:14:11,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-10-13 01:14:11,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-10-13 01:14:11,233 ERROR L172 FreeRefinementEngine]: Strategy WOLF failed to provide any proof altough trace is infeasible [2021-10-13 01:14:11,234 INFO L626 BasicCegarLoop]: Counterexample might be feasible [2021-10-13 01:14:11,240 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 01:14:11,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:11,446 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 01:14:11,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 01:14:11,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_668ab741-94bb-4e6b-8374-bcf14838411a/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 01:14:11,851 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 01:14:11,890 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 01:14:11 BoogieIcfgContainer [2021-10-13 01:14:11,890 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 01:14:11,891 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 01:14:11,891 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 01:14:11,891 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 01:14:11,892 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:13:26" (3/4) ... [2021-10-13 01:14:11,898 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-13 01:14:11,898 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 01:14:11,900 INFO L168 Benchmark]: Toolchain (without parser) took 46186.37 ms. Allocated memory was 54.5 MB in the beginning and 86.0 MB in the end (delta: 31.5 MB). Free memory was 30.5 MB in the beginning and 28.6 MB in the end (delta: 1.9 MB). Peak memory consumption was 34.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:14:11,900 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 54.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:14:11,902 INFO L168 Benchmark]: CACSL2BoogieTranslator took 392.16 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 30.3 MB in the beginning and 53.5 MB in the end (delta: -23.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. [2021-10-13 01:14:11,903 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.48 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 51.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:14:11,904 INFO L168 Benchmark]: Boogie Preprocessor took 42.75 ms. Allocated memory is still 71.3 MB. Free memory was 51.8 MB in the beginning and 50.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 01:14:11,905 INFO L168 Benchmark]: RCFGBuilder took 560.54 ms. Allocated memory is still 71.3 MB. Free memory was 50.2 MB in the beginning and 53.2 MB in the end (delta: -3.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. [2021-10-13 01:14:11,909 INFO L168 Benchmark]: TraceAbstraction took 45116.80 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 52.7 MB in the beginning and 28.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2021-10-13 01:14:11,909 INFO L168 Benchmark]: Witness Printer took 7.64 ms. Allocated memory is still 86.0 MB. Free memory is still 28.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 01:14:11,920 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 54.5 MB. Free memory was 35.2 MB in the beginning and 35.2 MB in the end (delta: 37.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 392.16 ms. Allocated memory was 54.5 MB in the beginning and 71.3 MB in the end (delta: 16.8 MB). Free memory was 30.3 MB in the beginning and 53.5 MB in the end (delta: -23.2 MB). Peak memory consumption was 7.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.48 ms. Allocated memory is still 71.3 MB. Free memory was 53.5 MB in the beginning and 51.8 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.75 ms. Allocated memory is still 71.3 MB. Free memory was 51.8 MB in the beginning and 50.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 560.54 ms. Allocated memory is still 71.3 MB. Free memory was 50.2 MB in the beginning and 53.2 MB in the end (delta: -3.0 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 45116.80 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 52.7 MB in the beginning and 28.6 MB in the end (delta: 24.1 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. * Witness Printer took 7.64 ms. Allocated memory is still 86.0 MB. Free memory is still 28.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 57]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L17] int N; [L32] N = __VERIFIER_nondet_int() [L33] COND TRUE N > 1 [L34] int x[N]; [L35] int temp; [L36] int ret; [L37] int ret2; [L38] int ret5; [L40] int i = 0; [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND TRUE i < N [L42] x[i] = __VERIFIER_nondet_int() [L40] i++ [L40] COND FALSE !(i < N) [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L45] ret = bAnd(x) [L47] EXPR x[0] [L47] temp=x[0] [L47] EXPR x[1] [L47] x[0] = x[1] [L47] x[1] = temp [L21] int i; [L22] long long res; [L23] EXPR x[0] [L23] res = x[0] [L24] i = 1 [L24] COND TRUE i < N [L25] EXPR x[i] [L25] res = res & x[i] [L24] i++ [L24] COND FALSE !(i < N) [L27] return res; [L48] ret2 = bAnd(x) [L49] EXPR x[0] [L49] temp=x[0] [L50] int i =0 ; [L50] COND TRUE i