./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/const_1-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cad46833 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/const_1-1.c -s /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 658f9355eb94ca4eb61d6206a3a34efe0abb7f9e .................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-cad4683 [2019-10-22 08:59:45,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-22 08:59:45,233 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-22 08:59:45,242 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-22 08:59:45,242 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-22 08:59:45,244 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-22 08:59:45,245 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-22 08:59:45,246 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-22 08:59:45,247 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-22 08:59:45,248 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-22 08:59:45,249 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-22 08:59:45,250 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-22 08:59:45,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-22 08:59:45,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-22 08:59:45,253 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-22 08:59:45,254 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-22 08:59:45,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-22 08:59:45,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-22 08:59:45,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-22 08:59:45,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-22 08:59:45,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-22 08:59:45,260 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-22 08:59:45,261 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-22 08:59:45,262 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-22 08:59:45,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-22 08:59:45,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-22 08:59:45,264 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-22 08:59:45,265 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-22 08:59:45,265 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-22 08:59:45,266 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-22 08:59:45,266 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-22 08:59:45,267 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-22 08:59:45,268 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-22 08:59:45,268 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-22 08:59:45,269 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-22 08:59:45,269 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-22 08:59:45,270 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-22 08:59:45,270 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-22 08:59:45,270 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-22 08:59:45,271 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-22 08:59:45,272 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-22 08:59:45,272 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-22 08:59:45,283 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-22 08:59:45,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-22 08:59:45,285 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-22 08:59:45,285 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-22 08:59:45,285 INFO L138 SettingsManager]: * Use SBE=true [2019-10-22 08:59:45,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-22 08:59:45,285 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-22 08:59:45,286 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-22 08:59:45,287 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-22 08:59:45,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-22 08:59:45,287 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-22 08:59:45,287 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-22 08:59:45,287 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-22 08:59:45,287 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-22 08:59:45,288 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-22 08:59:45,288 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-22 08:59:45,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-22 08:59:45,289 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-22 08:59:45,289 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/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(__VERIFIER_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 -> 658f9355eb94ca4eb61d6206a3a34efe0abb7f9e [2019-10-22 08:59:45,320 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-22 08:59:45,335 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-22 08:59:45,338 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-22 08:59:45,339 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-22 08:59:45,340 INFO L275 PluginConnector]: CDTParser initialized [2019-10-22 08:59:45,340 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/const_1-1.c [2019-10-22 08:59:45,388 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/data/7886fd328/f56ee0723e9c46879f685da546904489/FLAG42b16378a [2019-10-22 08:59:45,749 INFO L306 CDTParser]: Found 1 translation units. [2019-10-22 08:59:45,749 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/sv-benchmarks/c/loop-acceleration/const_1-1.c [2019-10-22 08:59:45,754 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/data/7886fd328/f56ee0723e9c46879f685da546904489/FLAG42b16378a [2019-10-22 08:59:45,766 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/data/7886fd328/f56ee0723e9c46879f685da546904489 [2019-10-22 08:59:45,769 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-22 08:59:45,770 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-10-22 08:59:45,771 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:45,771 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-22 08:59:45,774 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-22 08:59:45,775 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:45" (1/1) ... [2019-10-22 08:59:45,777 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3692950b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:45, skipping insertion in model container [2019-10-22 08:59:45,777 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.10 08:59:45" (1/1) ... [2019-10-22 08:59:45,784 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-22 08:59:45,798 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-22 08:59:45,936 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:45,940 INFO L188 MainTranslator]: Completed pre-run [2019-10-22 08:59:46,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-22 08:59:46,061 INFO L192 MainTranslator]: Completed translation [2019-10-22 08:59:46,061 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46 WrapperNode [2019-10-22 08:59:46,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-22 08:59:46,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:46,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-10-22 08:59:46,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-10-22 08:59:46,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,075 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,091 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-10-22 08:59:46,092 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-22 08:59:46,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-22 08:59:46,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-22 08:59:46,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,098 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,100 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... [2019-10-22 08:59:46,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-22 08:59:46,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-22 08:59:46,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-22 08:59:46,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-22 08:59:46,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/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 [2019-10-22 08:59:46,167 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-22 08:59:46,167 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-22 08:59:46,283 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-22 08:59:46,283 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-10-22 08:59:46,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:46 BoogieIcfgContainer [2019-10-22 08:59:46,284 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-22 08:59:46,285 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-22 08:59:46,285 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-22 08:59:46,288 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-22 08:59:46,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.10 08:59:45" (1/3) ... [2019-10-22 08:59:46,290 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350bc61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:46, skipping insertion in model container [2019-10-22 08:59:46,290 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.10 08:59:46" (2/3) ... [2019-10-22 08:59:46,291 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350bc61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.10 08:59:46, skipping insertion in model container [2019-10-22 08:59:46,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:46" (3/3) ... [2019-10-22 08:59:46,292 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2019-10-22 08:59:46,299 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-22 08:59:46,305 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-22 08:59:46,315 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-22 08:59:46,338 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-22 08:59:46,339 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-22 08:59:46,340 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-22 08:59:46,340 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-22 08:59:46,340 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-22 08:59:46,340 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-22 08:59:46,340 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-22 08:59:46,340 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-22 08:59:46,353 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-10-22 08:59:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-10-22 08:59:46,362 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:46,363 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-10-22 08:59:46,364 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 29805000, now seen corresponding path program 1 times [2019-10-22 08:59:46,381 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:46,382 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557899134] [2019-10-22 08:59:46,382 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:46,383 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:46,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:46,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:46,536 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557899134] [2019-10-22 08:59:46,537 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-22 08:59:46,537 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-22 08:59:46,537 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441502176] [2019-10-22 08:59:46,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-22 08:59:46,542 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:46,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-22 08:59:46,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:59:46,556 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-10-22 08:59:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:46,579 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2019-10-22 08:59:46,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-22 08:59:46,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2019-10-22 08:59:46,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:46,590 INFO L225 Difference]: With dead ends: 17 [2019-10-22 08:59:46,590 INFO L226 Difference]: Without dead ends: 7 [2019-10-22 08:59:46,605 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-22 08:59:46,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-10-22 08:59:46,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-10-22 08:59:46,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-10-22 08:59:46,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-10-22 08:59:46,639 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-10-22 08:59:46,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:46,640 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-10-22 08:59:46,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-22 08:59:46,640 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-10-22 08:59:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-10-22 08:59:46,641 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:46,641 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-10-22 08:59:46,641 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:46,642 INFO L82 PathProgramCache]: Analyzing trace with hash 925620370, now seen corresponding path program 1 times [2019-10-22 08:59:46,642 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:46,642 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896013790] [2019-10-22 08:59:46,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:46,642 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:46,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:46,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896013790] [2019-10-22 08:59:46,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348048428] [2019-10-22 08:59:46,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/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 [2019-10-22 08:59:46,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:46,743 INFO L256 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-22 08:59:46,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:46,788 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:46,788 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2019-10-22 08:59:46,788 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802410875] [2019-10-22 08:59:46,790 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-22 08:59:46,790 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-22 08:59:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:46,790 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 5 states. [2019-10-22 08:59:46,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:46,808 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2019-10-22 08:59:46,808 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:46,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2019-10-22 08:59:46,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:46,809 INFO L225 Difference]: With dead ends: 12 [2019-10-22 08:59:46,809 INFO L226 Difference]: Without dead ends: 8 [2019-10-22 08:59:46,810 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-22 08:59:46,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-10-22 08:59:46,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-10-22 08:59:46,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-10-22 08:59:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-10-22 08:59:46,812 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-10-22 08:59:46,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:46,813 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-10-22 08:59:46,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-22 08:59:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-10-22 08:59:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-10-22 08:59:46,813 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:46,813 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2019-10-22 08:59:47,014 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:47,014 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1368874232, now seen corresponding path program 2 times [2019-10-22 08:59:47,015 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:47,015 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561191006] [2019-10-22 08:59:47,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:47,015 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:47,016 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:47,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:47,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561191006] [2019-10-22 08:59:47,087 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419854987] [2019-10-22 08:59:47,088 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/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 [2019-10-22 08:59:47,115 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-22 08:59:47,116 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:47,117 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-22 08:59:47,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:47,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:47,142 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-22 08:59:47,143 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-10-22 08:59:47,143 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407720896] [2019-10-22 08:59:47,143 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-22 08:59:47,143 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:47,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-22 08:59:47,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:47,144 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 6 states. [2019-10-22 08:59:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:47,180 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2019-10-22 08:59:47,181 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-22 08:59:47,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2019-10-22 08:59:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:47,182 INFO L225 Difference]: With dead ends: 13 [2019-10-22 08:59:47,182 INFO L226 Difference]: Without dead ends: 9 [2019-10-22 08:59:47,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-22 08:59:47,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-10-22 08:59:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-10-22 08:59:47,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-10-22 08:59:47,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-10-22 08:59:47,185 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2019-10-22 08:59:47,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:47,185 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-10-22 08:59:47,185 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-22 08:59:47,185 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-10-22 08:59:47,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-10-22 08:59:47,185 INFO L372 BasicCegarLoop]: Found error trace [2019-10-22 08:59:47,185 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1] [2019-10-22 08:59:47,386 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:47,386 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-22 08:59:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-22 08:59:47,387 INFO L82 PathProgramCache]: Analyzing trace with hash 516237138, now seen corresponding path program 3 times [2019-10-22 08:59:47,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-22 08:59:47,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504933299] [2019-10-22 08:59:47,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:47,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-22 08:59:47,387 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-22 08:59:47,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-22 08:59:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-22 08:59:47,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504933299] [2019-10-22 08:59:47,493 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395406516] [2019-10-22 08:59:47,493 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/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 [2019-10-22 08:59:47,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-22 08:59:47,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-22 08:59:47,518 INFO L256 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 10 conjunts are in the unsatisfiable core [2019-10-22 08:59:47,519 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-22 08:59:47,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-22 08:59:47,540 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-22 08:59:47,540 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2019-10-22 08:59:47,540 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178003228] [2019-10-22 08:59:47,541 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-22 08:59:47,541 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-22 08:59:47,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-22 08:59:47,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2019-10-22 08:59:47,541 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 4 states. [2019-10-22 08:59:47,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-22 08:59:47,555 INFO L93 Difference]: Finished difference Result 9 states and 9 transitions. [2019-10-22 08:59:47,556 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-22 08:59:47,556 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-10-22 08:59:47,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-22 08:59:47,556 INFO L225 Difference]: With dead ends: 9 [2019-10-22 08:59:47,556 INFO L226 Difference]: Without dead ends: 0 [2019-10-22 08:59:47,557 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2019-10-22 08:59:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-22 08:59:47,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-22 08:59:47,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-22 08:59:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-22 08:59:47,557 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 8 [2019-10-22 08:59:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-22 08:59:47,557 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-22 08:59:47,557 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-22 08:59:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-22 08:59:47,558 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-22 08:59:47,758 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-22 08:59:47,761 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-22 08:59:47,789 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-22 08:59:47,789 INFO L443 ceAbstractionStarter]: For program point L5(line 5) no Hoare annotation was computed. [2019-10-22 08:59:47,789 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-10-22 08:59:47,789 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-22 08:59:47,789 INFO L439 ceAbstractionStarter]: At program point L14-2(lines 14 17) the Hoare annotation is: (or (= ULTIMATE.start_main_~x~0 0) (and (<= ULTIMATE.start_main_~y~0 0) (<= 0 ULTIMATE.start_main_~y~0))) [2019-10-22 08:59:47,789 INFO L443 ceAbstractionStarter]: For program point L14-3(lines 14 17) no Hoare annotation was computed. [2019-10-22 08:59:47,790 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2019-10-22 08:59:47,790 INFO L443 ceAbstractionStarter]: For program point L4(lines 4 6) no Hoare annotation was computed. [2019-10-22 08:59:47,790 INFO L446 ceAbstractionStarter]: At program point L4-2(lines 1 20) the Hoare annotation is: true [2019-10-22 08:59:47,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.10 08:59:47 BoogieIcfgContainer [2019-10-22 08:59:47,803 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-22 08:59:47,803 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-10-22 08:59:47,803 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-10-22 08:59:47,804 INFO L275 PluginConnector]: Witness Printer initialized [2019-10-22 08:59:47,804 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.10 08:59:46" (3/4) ... [2019-10-22 08:59:47,808 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-10-22 08:59:47,818 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-10-22 08:59:47,819 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-10-22 08:59:47,863 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_2adf4ca8-2b95-4ad1-818a-623d85ccc6fa/bin/uautomizer/witness.graphml [2019-10-22 08:59:47,863 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-10-22 08:59:47,865 INFO L168 Benchmark]: Toolchain (without parser) took 2094.68 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.5 MB in the beginning and 1.0 GB in the end (delta: -94.4 MB). Peak memory consumption was 50.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:47,866 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:47,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:47,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:47,868 INFO L168 Benchmark]: Boogie Preprocessor took 13.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2019-10-22 08:59:47,869 INFO L168 Benchmark]: RCFGBuilder took 178.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:47,869 INFO L168 Benchmark]: TraceAbstraction took 1517.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 77.4 MB). Peak memory consumption was 77.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:47,872 INFO L168 Benchmark]: Witness Printer took 60.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. [2019-10-22 08:59:47,874 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 1.0 GB. Free memory is still 962.0 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 291.25 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 145.2 MB). Free memory was 944.5 MB in the beginning and 1.1 GB in the end (delta: -194.2 MB). Peak memory consumption was 22.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.57 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 13.61 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 178.34 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1517.86 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 77.4 MB). Peak memory consumption was 77.4 MB. Max. memory is 11.5 GB. * Witness Printer took 60.24 ms. Allocated memory is still 1.2 GB. Free memory was 1.0 GB in the beginning and 1.0 GB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 14]: Loop Invariant Derived loop invariant: x == 0 || (y <= 0 && 0 <= y) - InvariantResult [Line: 1]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 9 locations, 1 error locations. Result: SAFE, OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 22 SDtfs, 1 SDslu, 25 SDs, 0 SdLazy, 28 SolverSat, 3 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=9occurred 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, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 6 NumberOfFragments, 12 HoareAnnotationTreeSize, 2 FomulaSimplifications, 20 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 47 NumberOfCodeBlocks, 46 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 878 SizeOfPredicates, 6 NumberOfNonLiveVariables, 67 ConjunctsInSsa, 22 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 6/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...