./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/n.c11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops/n.c11.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ba63c30fcd23f432b857b2315ba9dece8a321b75 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2021-10-11 00:28:40,435 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-11 00:28:40,437 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-11 00:28:40,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-11 00:28:40,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-11 00:28:40,492 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-11 00:28:40,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-11 00:28:40,500 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-11 00:28:40,505 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-11 00:28:40,512 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-11 00:28:40,513 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-11 00:28:40,514 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-11 00:28:40,515 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-11 00:28:40,516 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-11 00:28:40,517 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-11 00:28:40,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-11 00:28:40,519 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-11 00:28:40,520 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-11 00:28:40,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-11 00:28:40,524 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-11 00:28:40,526 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-11 00:28:40,533 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-11 00:28:40,534 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-11 00:28:40,535 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-11 00:28:40,538 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-11 00:28:40,539 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-11 00:28:40,539 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-11 00:28:40,540 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-11 00:28:40,540 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-11 00:28:40,542 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-11 00:28:40,542 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-11 00:28:40,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-11 00:28:40,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-11 00:28:40,549 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-11 00:28:40,550 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-11 00:28:40,551 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-11 00:28:40,551 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-11 00:28:40,552 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-11 00:28:40,552 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-11 00:28:40,553 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-11 00:28:40,554 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-11 00:28:40,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-11 00:28:40,600 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-11 00:28:40,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-11 00:28:40,602 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-11 00:28:40,602 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-11 00:28:40,603 INFO L138 SettingsManager]: * Use SBE=true [2021-10-11 00:28:40,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-11 00:28:40,603 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-11 00:28:40,603 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-11 00:28:40,603 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-11 00:28:40,610 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-11 00:28:40,611 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-11 00:28:40,611 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-11 00:28:40,611 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-11 00:28:40,611 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-11 00:28:40,612 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-11 00:28:40,612 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-11 00:28:40,612 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-11 00:28:40,612 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-11 00:28:40,612 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-11 00:28:40,613 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-11 00:28:40,613 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:28:40,613 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-11 00:28:40,613 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-11 00:28:40,613 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-11 00:28:40,614 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-11 00:28:40,614 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-11 00:28:40,614 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-11 00:28:40,614 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-11 00:28:40,614 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_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ba63c30fcd23f432b857b2315ba9dece8a321b75 [2021-10-11 00:28:40,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-11 00:28:40,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-11 00:28:40,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-11 00:28:40,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-11 00:28:40,964 INFO L275 PluginConnector]: CDTParser initialized [2021-10-11 00:28:40,965 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/../../sv-benchmarks/c/loops/n.c11.c [2021-10-11 00:28:41,033 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/data/2eb042fbc/25dd83e7221b4ee4bfc08af4171a29cb/FLAGb347923d3 [2021-10-11 00:28:41,466 INFO L306 CDTParser]: Found 1 translation units. [2021-10-11 00:28:41,466 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/sv-benchmarks/c/loops/n.c11.c [2021-10-11 00:28:41,473 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/data/2eb042fbc/25dd83e7221b4ee4bfc08af4171a29cb/FLAGb347923d3 [2021-10-11 00:28:41,859 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/data/2eb042fbc/25dd83e7221b4ee4bfc08af4171a29cb [2021-10-11 00:28:41,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-11 00:28:41,862 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-11 00:28:41,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-11 00:28:41,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-11 00:28:41,871 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-11 00:28:41,873 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:28:41" (1/1) ... [2021-10-11 00:28:41,880 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e00f4fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:41, skipping insertion in model container [2021-10-11 00:28:41,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 12:28:41" (1/1) ... [2021-10-11 00:28:41,889 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-11 00:28:41,905 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-11 00:28:42,056 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/sv-benchmarks/c/loops/n.c11.c[317,330] [2021-10-11 00:28:42,071 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:28:42,081 INFO L203 MainTranslator]: Completed pre-run [2021-10-11 00:28:42,094 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/sv-benchmarks/c/loops/n.c11.c[317,330] [2021-10-11 00:28:42,098 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-11 00:28:42,120 INFO L208 MainTranslator]: Completed translation [2021-10-11 00:28:42,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42 WrapperNode [2021-10-11 00:28:42,121 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-11 00:28:42,122 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-11 00:28:42,122 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-11 00:28:42,122 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-11 00:28:42,130 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,138 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,157 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-11 00:28:42,158 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-11 00:28:42,158 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-11 00:28:42,159 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-11 00:28:42,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,169 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,170 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... [2021-10-11 00:28:42,180 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-11 00:28:42,181 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-11 00:28:42,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-11 00:28:42,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-11 00:28:42,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (1/1) ... No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-11 00:28:42,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-11 00:28:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-11 00:28:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-11 00:28:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-11 00:28:42,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-11 00:28:42,498 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-11 00:28:42,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:42 BoogieIcfgContainer [2021-10-11 00:28:42,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-11 00:28:42,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-11 00:28:42,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-11 00:28:42,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-11 00:28:42,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 12:28:41" (1/3) ... [2021-10-11 00:28:42,507 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f820bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:28:42, skipping insertion in model container [2021-10-11 00:28:42,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 12:28:42" (2/3) ... [2021-10-11 00:28:42,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f820bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 12:28:42, skipping insertion in model container [2021-10-11 00:28:42,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:42" (3/3) ... [2021-10-11 00:28:42,509 INFO L111 eAbstractionObserver]: Analyzing ICFG n.c11.c [2021-10-11 00:28:42,524 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-11 00:28:42,526 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-10-11 00:28:42,536 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-11 00:28:42,560 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-10-11 00:28:42,560 INFO L378 AbstractCegarLoop]: Hoare is true [2021-10-11 00:28:42,560 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-10-11 00:28:42,560 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-10-11 00:28:42,561 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-10-11 00:28:42,561 INFO L382 AbstractCegarLoop]: Difference is false [2021-10-11 00:28:42,561 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-10-11 00:28:42,561 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-10-11 00:28:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-10-11 00:28:42,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:28:42,580 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:42,581 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:28:42,581 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:42,588 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-10-11 00:28:42,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:42,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215269892] [2021-10-11 00:28:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:42,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:42,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215269892] [2021-10-11 00:28:42,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:28:42,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-11 00:28:42,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952636636] [2021-10-11 00:28:42,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-10-11 00:28:42,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-11 00:28:42,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:28:42,784 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-10-11 00:28:42,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:42,821 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-11 00:28:42,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-11 00:28:42,822 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-10-11 00:28:42,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:42,831 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:28:42,831 INFO L226 Difference]: Without dead ends: 9 [2021-10-11 00:28:42,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-11 00:28:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-11 00:28:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-11 00:28:42,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-10-11 00:28:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-10-11 00:28:42,866 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-10-11 00:28:42,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:42,867 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-10-11 00:28:42,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-10-11 00:28:42,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-10-11 00:28:42,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-11 00:28:42,868 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:42,868 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-11 00:28:42,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-11 00:28:42,868 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:42,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:42,870 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-10-11 00:28:42,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:42,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443795885] [2021-10-11 00:28:42,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:43,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:43,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443795885] [2021-10-11 00:28:43,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-11 00:28:43,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-11 00:28:43,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74171826] [2021-10-11 00:28:43,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-10-11 00:28:43,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:43,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-11 00:28:43,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-11 00:28:43,055 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 4 states. [2021-10-11 00:28:43,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:43,112 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2021-10-11 00:28:43,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-11 00:28:43,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-10-11 00:28:43,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:43,113 INFO L225 Difference]: With dead ends: 21 [2021-10-11 00:28:43,113 INFO L226 Difference]: Without dead ends: 12 [2021-10-11 00:28:43,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-11 00:28:43,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-11 00:28:43,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-11 00:28:43,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-10-11 00:28:43,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-10-11 00:28:43,122 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-10-11 00:28:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:43,123 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-10-11 00:28:43,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-10-11 00:28:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-10-11 00:28:43,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-11 00:28:43,124 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:43,125 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:43,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-11 00:28:43,126 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:43,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:43,127 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-10-11 00:28:43,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:43,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579951037] [2021-10-11 00:28:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:43,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579951037] [2021-10-11 00:28:43,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690267535] [2021-10-11 00:28:43,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:43,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:43,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-11 00:28:43,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:43,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:43,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:43,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-10-11 00:28:43,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776104009] [2021-10-11 00:28:43,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-10-11 00:28:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:43,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-11 00:28:43,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-11 00:28:43,486 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2021-10-11 00:28:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:43,558 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2021-10-11 00:28:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-11 00:28:43,570 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-10-11 00:28:43,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:43,571 INFO L225 Difference]: With dead ends: 24 [2021-10-11 00:28:43,571 INFO L226 Difference]: Without dead ends: 15 [2021-10-11 00:28:43,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:28:43,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-11 00:28:43,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-10-11 00:28:43,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-10-11 00:28:43,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-10-11 00:28:43,576 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-10-11 00:28:43,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:43,577 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-10-11 00:28:43,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-10-11 00:28:43,577 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-10-11 00:28:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-11 00:28:43,578 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:43,578 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:43,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-10-11 00:28:43,803 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:43,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:43,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2021-10-11 00:28:43,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:43,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387972515] [2021-10-11 00:28:43,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:43,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:43,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:43,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387972515] [2021-10-11 00:28:43,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266201618] [2021-10-11 00:28:43,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:43,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-11 00:28:43,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:43,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-11 00:28:43,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:44,011 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:28:44,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:44,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:44,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-10-11 00:28:44,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717214735] [2021-10-11 00:28:44,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-10-11 00:28:44,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:44,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-11 00:28:44,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-11 00:28:44,045 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2021-10-11 00:28:44,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:44,152 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-10-11 00:28:44,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-11 00:28:44,153 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-10-11 00:28:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:44,154 INFO L225 Difference]: With dead ends: 30 [2021-10-11 00:28:44,154 INFO L226 Difference]: Without dead ends: 18 [2021-10-11 00:28:44,156 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:28:44,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-11 00:28:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-10-11 00:28:44,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-10-11 00:28:44,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-10-11 00:28:44,163 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-10-11 00:28:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:44,163 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-10-11 00:28:44,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-10-11 00:28:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-10-11 00:28:44,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-11 00:28:44,165 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:44,165 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:44,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:44,366 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:44,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:44,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2021-10-11 00:28:44,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:44,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055513001] [2021-10-11 00:28:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:44,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055513001] [2021-10-11 00:28:44,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730899232] [2021-10-11 00:28:44,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:44,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-11 00:28:44,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-11 00:28:44,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:44,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:28:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:44,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:44,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-10-11 00:28:44,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233858657] [2021-10-11 00:28:44,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-10-11 00:28:44,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:44,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-11 00:28:44,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-10-11 00:28:44,697 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 9 states. [2021-10-11 00:28:44,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:44,773 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-10-11 00:28:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-11 00:28:44,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2021-10-11 00:28:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:44,774 INFO L225 Difference]: With dead ends: 36 [2021-10-11 00:28:44,774 INFO L226 Difference]: Without dead ends: 21 [2021-10-11 00:28:44,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:28:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-11 00:28:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-11 00:28:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-10-11 00:28:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-11 00:28:44,780 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2021-10-11 00:28:44,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:44,780 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-11 00:28:44,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-10-11 00:28:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-11 00:28:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-11 00:28:44,781 INFO L414 BasicCegarLoop]: Found error trace [2021-10-11 00:28:44,782 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1] [2021-10-11 00:28:45,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:45,007 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-10-11 00:28:45,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-11 00:28:45,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1171899538, now seen corresponding path program 4 times [2021-10-11 00:28:45,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-11 00:28:45,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009352739] [2021-10-11 00:28:45,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-11 00:28:45,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-11 00:28:45,171 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:45,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009352739] [2021-10-11 00:28:45,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510496396] [2021-10-11 00:28:45,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:45,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-11 00:28:45,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-11 00:28:45,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-11 00:28:45,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-11 00:28:45,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-10-11 00:28:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-11 00:28:45,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-11 00:28:45,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-10-11 00:28:45,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564159041] [2021-10-11 00:28:45,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-10-11 00:28:45,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-11 00:28:45,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-11 00:28:45,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-10-11 00:28:45,297 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 10 states. [2021-10-11 00:28:45,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-11 00:28:45,361 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-10-11 00:28:45,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-11 00:28:45,362 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 18 [2021-10-11 00:28:45,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-11 00:28:45,362 INFO L225 Difference]: With dead ends: 34 [2021-10-11 00:28:45,363 INFO L226 Difference]: Without dead ends: 0 [2021-10-11 00:28:45,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-10-11 00:28:45,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-11 00:28:45,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-11 00:28:45,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-10-11 00:28:45,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-11 00:28:45,364 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-11 00:28:45,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-11 00:28:45,364 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-11 00:28:45,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-10-11 00:28:45,364 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-11 00:28:45,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-11 00:28:45,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-11 00:28:45,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-11 00:28:45,631 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L265 CegarLoopResult]: At program point L31(lines 14 34) the Hoare annotation is: true [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point L23(lines 23 24) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point L23-2(lines 23 24) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L258 CegarLoopResult]: At program point L21-2(lines 21 29) the Hoare annotation is: (or (= ULTIMATE.start_main_~len~0 0) (and (<= ULTIMATE.start_main_~len~0 4) (<= 4 ULTIMATE.start_main_~len~0)) (and (<= 2 ULTIMATE.start_main_~len~0) (<= ULTIMATE.start_main_~len~0 2)) (= ULTIMATE.start_main_~len~0 1) (and (<= ULTIMATE.start_main_~len~0 3) (<= 3 ULTIMATE.start_main_~len~0))) [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point L21-3(lines 21 29) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-11 00:28:45,632 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-11 00:28:45,633 INFO L262 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-11 00:28:45,633 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-10-11 00:28:45,633 INFO L262 CegarLoopResult]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-11 00:28:45,633 INFO L265 CegarLoopResult]: At program point L6-2(lines 5 10) the Hoare annotation is: true [2021-10-11 00:28:45,660 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.10 12:28:45 BoogieIcfgContainer [2021-10-11 00:28:45,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-11 00:28:45,662 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-11 00:28:45,662 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-11 00:28:45,662 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-11 00:28:45,663 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 12:28:42" (3/4) ... [2021-10-11 00:28:45,667 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-11 00:28:45,677 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 8 nodes and edges [2021-10-11 00:28:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-11 00:28:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:28:45,678 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-11 00:28:45,718 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf7c8861-e492-4103-b0e4-b681fe8ece64/bin/uautomizer-Z5i5R5N3CC/witness.graphml [2021-10-11 00:28:45,718 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-11 00:28:45,720 INFO L168 Benchmark]: Toolchain (without parser) took 3856.66 ms. Allocated memory was 86.0 MB in the beginning and 125.8 MB in the end (delta: 39.8 MB). Free memory was 44.3 MB in the beginning and 102.6 MB in the end (delta: -58.3 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,721 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 60.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:45,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 254.68 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 44.1 MB in the beginning and 80.0 MB in the end (delta: -35.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,723 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.61 ms. Allocated memory is still 104.9 MB. Free memory was 80.0 MB in the beginning and 78.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-11 00:28:45,723 INFO L168 Benchmark]: Boogie Preprocessor took 22.23 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 77.9 MB in the end (delta: 715.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,726 INFO L168 Benchmark]: RCFGBuilder took 318.16 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 78.9 MB in the end (delta: -945.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,726 INFO L168 Benchmark]: TraceAbstraction took 3159.91 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 78.2 MB in the beginning and 45.7 MB in the end (delta: 32.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,727 INFO L168 Benchmark]: Witness Printer took 56.94 ms. Allocated memory is still 125.8 MB. Free memory was 45.7 MB in the beginning and 102.6 MB in the end (delta: -56.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-11 00:28:45,731 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 60.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 254.68 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 44.1 MB in the beginning and 80.0 MB in the end (delta: -35.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.61 ms. Allocated memory is still 104.9 MB. Free memory was 80.0 MB in the beginning and 78.7 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.23 ms. Allocated memory is still 104.9 MB. Free memory was 78.7 MB in the beginning and 77.9 MB in the end (delta: 715.0 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 318.16 ms. Allocated memory is still 104.9 MB. Free memory was 77.9 MB in the beginning and 78.9 MB in the end (delta: -945.5 kB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3159.91 ms. Allocated memory was 104.9 MB in the beginning and 125.8 MB in the end (delta: 21.0 MB). Free memory was 78.2 MB in the beginning and 45.7 MB in the end (delta: 32.5 MB). Peak memory consumption was 56.0 MB. Max. memory is 16.1 GB. * Witness Printer took 56.94 ms. Allocated memory is still 125.8 MB. Free memory was 45.7 MB in the beginning and 102.6 MB in the end (delta: -56.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 14]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((len == 0 || (len <= 4 && 4 <= len)) || (2 <= len && len <= 2)) || len == 1) || (len <= 3 && 3 <= len) - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 4, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 56 SDtfs, 45 SDslu, 139 SDs, 0 SdLazy, 195 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 4 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 3 PreInvPairs, 10 NumberOfFragments, 30 HoareAnnotationTreeSize, 3 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 120 NumberOfCodeBlocks, 120 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 7051 SizeOfPredicates, 8 NumberOfNonLiveVariables, 218 ConjunctsInSsa, 53 ConjunctsInUnsatCore, 10 InterpolantComputations, 2 PerfectInterpolantSequences, 0/80 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...