./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark19_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark19_conjunctive.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer --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 b3778a0dc06b06dbf04163d9b170743f1501fb85 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-29 21:31:27,036 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 21:31:27,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 21:31:27,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 21:31:27,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 21:31:27,076 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 21:31:27,078 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 21:31:27,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 21:31:27,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 21:31:27,084 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 21:31:27,086 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 21:31:27,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 21:31:27,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 21:31:27,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 21:31:27,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 21:31:27,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 21:31:27,095 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 21:31:27,096 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 21:31:27,099 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 21:31:27,101 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 21:31:27,103 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 21:31:27,107 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 21:31:27,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 21:31:27,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 21:31:27,114 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 21:31:27,114 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 21:31:27,115 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 21:31:27,116 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 21:31:27,117 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 21:31:27,118 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 21:31:27,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 21:31:27,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 21:31:27,121 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 21:31:27,122 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 21:31:27,124 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 21:31:27,124 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 21:31:27,125 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 21:31:27,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 21:31:27,126 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 21:31:27,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 21:31:27,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 21:31:27,129 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 21:31:27,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 21:31:27,154 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 21:31:27,156 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 21:31:27,156 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 21:31:27,156 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 21:31:27,156 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 21:31:27,157 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 21:31:27,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 21:31:27,157 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 21:31:27,157 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 21:31:27,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 21:31:27,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 21:31:27,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 21:31:27,158 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 21:31:27,159 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 21:31:27,159 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 21:31:27,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 21:31:27,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 21:31:27,160 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 21:31:27,160 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 21:31:27,160 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 21:31:27,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 21:31:27,161 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 21:31:27,161 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 21:31:27,161 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 21:31:27,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 21:31:27,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 21:31:27,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 21:31:27,169 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 21:31:27,169 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-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b3778a0dc06b06dbf04163d9b170743f1501fb85 [2020-11-29 21:31:27,478 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 21:31:27,516 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 21:31:27,519 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 21:31:27,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 21:31:27,522 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 21:31:27,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/../../sv-benchmarks/c/loop-zilu/benchmark19_conjunctive.i [2020-11-29 21:31:27,589 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/data/9e9830e3b/d2da35e43a9d4e95bcae24e80e01f2f6/FLAGec7393e32 [2020-11-29 21:31:28,145 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 21:31:28,146 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/sv-benchmarks/c/loop-zilu/benchmark19_conjunctive.i [2020-11-29 21:31:28,170 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/data/9e9830e3b/d2da35e43a9d4e95bcae24e80e01f2f6/FLAGec7393e32 [2020-11-29 21:31:28,600 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/data/9e9830e3b/d2da35e43a9d4e95bcae24e80e01f2f6 [2020-11-29 21:31:28,606 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 21:31:28,608 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 21:31:28,610 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 21:31:28,610 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 21:31:28,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 21:31:28,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17864c8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28, skipping insertion in model container [2020-11-29 21:31:28,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,628 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 21:31:28,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 21:31:28,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:31:28,842 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 21:31:28,858 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 21:31:28,873 INFO L208 MainTranslator]: Completed translation [2020-11-29 21:31:28,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28 WrapperNode [2020-11-29 21:31:28,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 21:31:28,876 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 21:31:28,876 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 21:31:28,876 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 21:31:28,884 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,891 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,909 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 21:31:28,910 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 21:31:28,910 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 21:31:28,910 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 21:31:28,918 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,919 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,920 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,920 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,927 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... [2020-11-29 21:31:28,930 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 21:31:28,931 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 21:31:28,931 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 21:31:28,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 21:31:28,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/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 [2020-11-29 21:31:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 21:31:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 21:31:28,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 21:31:29,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 21:31:29,276 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 21:31:29,276 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-29 21:31:29,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:29 BoogieIcfgContainer [2020-11-29 21:31:29,278 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 21:31:29,279 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 21:31:29,280 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 21:31:29,283 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 21:31:29,283 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 09:31:28" (1/3) ... [2020-11-29 21:31:29,284 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbe1193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:31:29, skipping insertion in model container [2020-11-29 21:31:29,284 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 09:31:28" (2/3) ... [2020-11-29 21:31:29,285 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbe1193 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 09:31:29, skipping insertion in model container [2020-11-29 21:31:29,285 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:29" (3/3) ... [2020-11-29 21:31:29,286 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark19_conjunctive.i [2020-11-29 21:31:29,298 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 21:31:29,302 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-29 21:31:29,314 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-29 21:31:29,349 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 21:31:29,352 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 21:31:29,352 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 21:31:29,352 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 21:31:29,356 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 21:31:29,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 21:31:29,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 21:31:29,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 21:31:29,368 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-29 21:31:29,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:29,374 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:29,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:31:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:29,380 INFO L82 PathProgramCache]: Analyzing trace with hash 185199154, now seen corresponding path program 1 times [2020-11-29 21:31:29,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:29,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407410752] [2020-11-29 21:31:29,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:29,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:29,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:29,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407410752] [2020-11-29 21:31:29,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:29,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 21:31:29,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699572865] [2020-11-29 21:31:29,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 21:31:29,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:29,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 21:31:29,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 21:31:29,612 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-29 21:31:29,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:29,627 INFO L93 Difference]: Finished difference Result 22 states and 27 transitions. [2020-11-29 21:31:29,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 21:31:29,628 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-11-29 21:31:29,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:29,636 INFO L225 Difference]: With dead ends: 22 [2020-11-29 21:31:29,637 INFO L226 Difference]: Without dead ends: 9 [2020-11-29 21:31:29,641 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 [2020-11-29 21:31:29,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-29 21:31:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-29 21:31:29,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-29 21:31:29,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2020-11-29 21:31:29,675 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 8 [2020-11-29 21:31:29,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:29,676 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2020-11-29 21:31:29,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 21:31:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2020-11-29 21:31:29,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 21:31:29,678 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:29,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:29,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 21:31:29,678 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:31:29,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:29,681 INFO L82 PathProgramCache]: Analyzing trace with hash 181505070, now seen corresponding path program 1 times [2020-11-29 21:31:29,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:29,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185733020] [2020-11-29 21:31:29,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:29,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:29,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185733020] [2020-11-29 21:31:29,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 21:31:29,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-29 21:31:29,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900437314] [2020-11-29 21:31:29,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-29 21:31:29,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:29,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-29 21:31:29,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:31:29,783 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 3 states. [2020-11-29 21:31:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:29,801 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2020-11-29 21:31:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 21:31:29,802 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-11-29 21:31:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:29,802 INFO L225 Difference]: With dead ends: 15 [2020-11-29 21:31:29,803 INFO L226 Difference]: Without dead ends: 10 [2020-11-29 21:31:29,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-29 21:31:29,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2020-11-29 21:31:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2020-11-29 21:31:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-11-29 21:31:29,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2020-11-29 21:31:29,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2020-11-29 21:31:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:29,807 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2020-11-29 21:31:29,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-29 21:31:29,807 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2020-11-29 21:31:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-29 21:31:29,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:29,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:29,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 21:31:29,808 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:31:29,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:29,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1383312870, now seen corresponding path program 1 times [2020-11-29 21:31:29,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:29,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15697428] [2020-11-29 21:31:29,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:29,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:29,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15697428] [2020-11-29 21:31:29,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276310818] [2020-11-29 21:31:29,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/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 [2020-11-29 21:31:30,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:30,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-29 21:31:30,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:30,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:30,209 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:30,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 21:31:30,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:30,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:31:30,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2020-11-29 21:31:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298400188] [2020-11-29 21:31:30,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:31:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:31:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:31:30,262 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2020-11-29 21:31:30,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:30,414 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2020-11-29 21:31:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-29 21:31:30,419 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-11-29 21:31:30,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:30,420 INFO L225 Difference]: With dead ends: 16 [2020-11-29 21:31:30,420 INFO L226 Difference]: Without dead ends: 11 [2020-11-29 21:31:30,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:31:30,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2020-11-29 21:31:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2020-11-29 21:31:30,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2020-11-29 21:31:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2020-11-29 21:31:30,423 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2020-11-29 21:31:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:30,423 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2020-11-29 21:31:30,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:31:30,424 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2020-11-29 21:31:30,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-29 21:31:30,424 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:30,424 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:30,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-29 21:31:30,625 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:31:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash -15350994, now seen corresponding path program 2 times [2020-11-29 21:31:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:30,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660283368] [2020-11-29 21:31:30,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:30,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660283368] [2020-11-29 21:31:30,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263852402] [2020-11-29 21:31:30,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/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 [2020-11-29 21:31:31,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-29 21:31:31,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:31:31,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-29 21:31:31,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:31,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:31,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:31,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 21:31:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:31,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:31:31,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-11-29 21:31:31,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307427346] [2020-11-29 21:31:31,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-29 21:31:31,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:31,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-29 21:31:31,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-29 21:31:31,194 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2020-11-29 21:31:31,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:31,383 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2020-11-29 21:31:31,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-29 21:31:31,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2020-11-29 21:31:31,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:31,384 INFO L225 Difference]: With dead ends: 17 [2020-11-29 21:31:31,384 INFO L226 Difference]: Without dead ends: 12 [2020-11-29 21:31:31,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:31:31,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-11-29 21:31:31,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-11-29 21:31:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-11-29 21:31:31,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-11-29 21:31:31,388 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-11-29 21:31:31,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:31,389 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-11-29 21:31:31,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-29 21:31:31,389 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-11-29 21:31:31,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-29 21:31:31,390 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 21:31:31,390 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 21:31:31,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:31:31,600 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-29 21:31:31,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 21:31:31,600 INFO L82 PathProgramCache]: Analyzing trace with hash -424257818, now seen corresponding path program 3 times [2020-11-29 21:31:31,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 21:31:31,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567776362] [2020-11-29 21:31:31,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 21:31:31,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 21:31:31,842 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:31,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567776362] [2020-11-29 21:31:31,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200271699] [2020-11-29 21:31:31,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/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 [2020-11-29 21:31:31,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-29 21:31:31,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-29 21:31:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-29 21:31:31,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-29 21:31:32,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:32,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-29 21:31:32,034 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-29 21:31:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 21:31:32,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-29 21:31:32,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2020-11-29 21:31:32,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639469761] [2020-11-29 21:31:32,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-29 21:31:32,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 21:31:32,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-29 21:31:32,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-11-29 21:31:32,067 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 11 states. [2020-11-29 21:31:32,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 21:31:32,497 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2020-11-29 21:31:32,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-29 21:31:32,498 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-11-29 21:31:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 21:31:32,498 INFO L225 Difference]: With dead ends: 15 [2020-11-29 21:31:32,498 INFO L226 Difference]: Without dead ends: 0 [2020-11-29 21:31:32,499 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-11-29 21:31:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-29 21:31:32,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-29 21:31:32,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-29 21:31:32,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-29 21:31:32,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 11 [2020-11-29 21:31:32,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 21:31:32,500 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-29 21:31:32,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-29 21:31:32,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-29 21:31:32,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-29 21:31:32,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-29 21:31:32,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-11-29 21:31:32,762 INFO L274 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-11-29 21:31:32,762 INFO L274 CegarLoopResult]: For program point L23(line 23) no Hoare annotation was computed. [2020-11-29 21:31:32,762 INFO L274 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point L11(line 11) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point L11-2(line 11) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point L-1(line -1) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-11-29 21:31:32,763 INFO L277 CegarLoopResult]: At program point L28(lines 19 29) the Hoare annotation is: true [2020-11-29 21:31:32,763 INFO L274 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 11) no Hoare annotation was computed. [2020-11-29 21:31:32,764 INFO L270 CegarLoopResult]: At program point L24-2(lines 24 26) the Hoare annotation is: (and (<= ULTIMATE.start_main_~k~0 ULTIMATE.start_main_~j~0) (< 0 ULTIMATE.start_main_~n~0) (<= ULTIMATE.start_main_~j~0 ULTIMATE.start_main_~k~0) (< 0 (+ ULTIMATE.start_main_~k~0 1))) [2020-11-29 21:31:32,764 INFO L274 CegarLoopResult]: For program point L24-3(lines 24 26) no Hoare annotation was computed. [2020-11-29 21:31:32,764 INFO L274 CegarLoopResult]: For program point L14(lines 14 18) no Hoare annotation was computed. [2020-11-29 21:31:32,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 09:31:32 BoogieIcfgContainer [2020-11-29 21:31:32,789 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 21:31:32,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 21:31:32,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 21:31:32,794 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 21:31:32,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 09:31:29" (3/4) ... [2020-11-29 21:31:32,797 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-29 21:31:32,808 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-29 21:31:32,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-11-29 21:31:32,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:31:32,809 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-11-29 21:31:32,861 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f88bc450-b70b-452f-ac15-1fa2851d404b/bin/uautomizer/witness.graphml [2020-11-29 21:31:32,861 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 21:31:32,862 INFO L168 Benchmark]: Toolchain (without parser) took 4253.47 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 75.5 MB in the beginning and 61.0 MB in the end (delta: 14.5 MB). Peak memory consumption was 40.2 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,863 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:31:32,863 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.15 ms. Allocated memory is still 96.5 MB. Free memory was 75.5 MB in the beginning and 66.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,864 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 64.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 21:31:32,864 INFO L168 Benchmark]: Boogie Preprocessor took 20.83 ms. Allocated memory is still 96.5 MB. Free memory was 64.8 MB in the beginning and 63.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,865 INFO L168 Benchmark]: RCFGBuilder took 346.89 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 52.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,866 INFO L168 Benchmark]: TraceAbstraction took 3513.38 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 52.3 MB in the beginning and 63.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,868 INFO L168 Benchmark]: Witness Printer took 67.63 ms. Allocated memory is still 121.6 MB. Free memory was 63.1 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 21:31:32,878 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 79.7 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.15 ms. Allocated memory is still 96.5 MB. Free memory was 75.5 MB in the beginning and 66.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.41 ms. Allocated memory is still 96.5 MB. Free memory was 66.1 MB in the beginning and 64.8 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.83 ms. Allocated memory is still 96.5 MB. Free memory was 64.8 MB in the beginning and 63.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 346.89 ms. Allocated memory is still 96.5 MB. Free memory was 63.7 MB in the beginning and 52.6 MB in the end (delta: 11.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3513.38 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 52.3 MB in the beginning and 63.1 MB in the end (delta: -10.8 MB). Peak memory consumption was 17.1 MB. Max. memory is 16.1 GB. * Witness Printer took 67.63 ms. Allocated memory is still 121.6 MB. Free memory was 63.1 MB in the beginning and 61.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 11]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((k <= j && 0 < n) && j <= k) && 0 < k + 1 - InvariantResult [Line: 19]: 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: 3.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 37 SDtfs, 18 SDslu, 61 SDs, 0 SdLazy, 118 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, 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, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 7 NumberOfFragments, 16 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 71 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 76 NumberOfCodeBlocks, 76 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 68 ConstructedInterpolants, 0 QuantifiedInterpolants, 3425 SizeOfPredicates, 15 NumberOfNonLiveVariables, 189 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 0/20 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...