./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/verifythis/elimination_max_rec.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 678e0110 Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 17d20a29a9e9cc6560e9aa0daac36f5de29f992c .................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/lib/jvm/java-8-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/verifythis/elimination_max_rec.c -s /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 17d20a29a9e9cc6560e9aa0daac36f5de29f992c ....................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.24-678e011 [2019-11-20 11:11:33,200 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:11:33,201 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:11:33,216 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:11:33,216 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:11:33,218 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:11:33,219 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:11:33,231 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:11:33,233 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:11:33,236 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:11:33,237 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:11:33,238 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:11:33,239 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:11:33,242 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:11:33,243 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:11:33,245 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:11:33,245 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:11:33,249 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:11:33,251 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:11:33,255 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:11:33,259 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:11:33,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:11:33,264 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:11:33,265 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:11:33,268 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:11:33,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:11:33,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:11:33,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:11:33,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:11:33,272 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:11:33,272 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:11:33,273 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:11:33,274 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:11:33,275 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:11:33,276 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:11:33,276 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:11:33,277 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:11:33,277 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:11:33,277 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:11:33,278 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:11:33,279 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:11:33,280 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-20 11:11:33,298 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:11:33,298 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:11:33,299 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:11:33,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:11:33,299 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:11:33,300 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:11:33,300 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:11:33,300 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-20 11:11:33,300 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:11:33,301 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:11:33,301 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:11:33,301 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:11:33,301 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:11:33,301 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:11:33,303 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:11:33,304 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:11:33,304 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:11:33,304 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:11:33,304 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:11:33,305 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:11:33,305 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:11:33,305 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:11:33,305 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:11:33,306 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:11:33,306 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:11:33,306 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-20 11:11:33,306 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-20 11:11:33,307 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:11:33,307 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/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 -> 17d20a29a9e9cc6560e9aa0daac36f5de29f992c [2019-11-20 11:11:33,445 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:11:33,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:11:33,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:11:33,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:11:33,460 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:11:33,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2019-11-20 11:11:33,520 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/5bf5b4a1f/32519b888b5d434a86c4834577e4e21b/FLAGc8a5d94f8 [2019-11-20 11:11:33,923 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:11:33,925 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/sv-benchmarks/c/verifythis/elimination_max_rec.c [2019-11-20 11:11:33,931 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/5bf5b4a1f/32519b888b5d434a86c4834577e4e21b/FLAGc8a5d94f8 [2019-11-20 11:11:33,947 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/5bf5b4a1f/32519b888b5d434a86c4834577e4e21b [2019-11-20 11:11:33,951 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:11:33,952 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:11:33,953 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:11:33,953 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:11:33,956 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:11:33,956 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:33" (1/1) ... [2019-11-20 11:11:33,959 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6139df45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:33, skipping insertion in model container [2019-11-20 11:11:33,959 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:33" (1/1) ... [2019-11-20 11:11:33,965 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:11:33,982 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:11:34,133 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:11:34,208 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:11:34,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:11:34,241 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:11:34,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34 WrapperNode [2019-11-20 11:11:34,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:11:34,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:11:34,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:11:34,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:11:34,251 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,259 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,279 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:11:34,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:11:34,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:11:34,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:11:34,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,304 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... [2019-11-20 11:11:34,317 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:11:34,318 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:11:34,318 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:11:34,318 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:11:34,319 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 [2019-11-20 11:11:34,370 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-20 11:11:34,370 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-20 11:11:34,370 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 11:11:34,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:11:34,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:11:34,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-20 11:11:34,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 11:11:34,733 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:11:34,734 INFO L285 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-20 11:11:34,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:34 BoogieIcfgContainer [2019-11-20 11:11:34,735 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:11:34,736 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:11:34,736 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:11:34,738 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:11:34,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:11:33" (1/3) ... [2019-11-20 11:11:34,741 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d19e127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:34, skipping insertion in model container [2019-11-20 11:11:34,741 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:34" (2/3) ... [2019-11-20 11:11:34,743 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d19e127 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:34, skipping insertion in model container [2019-11-20 11:11:34,743 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:34" (3/3) ... [2019-11-20 11:11:34,747 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2019-11-20 11:11:34,756 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:11:34,762 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-20 11:11:34,772 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-20 11:11:34,797 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:11:34,797 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 11:11:34,797 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:11:34,798 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:11:34,798 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:11:34,798 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:11:34,798 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:11:34,799 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:11:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-20 11:11:34,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 11:11:34,819 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:11:34,820 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:11:34,820 INFO L410 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:11:34,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:11:34,829 INFO L82 PathProgramCache]: Analyzing trace with hash 121169294, now seen corresponding path program 1 times [2019-11-20 11:11:34,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:11:34,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759652352] [2019-11-20 11:11:34,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:11:34,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:35,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:11:35,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759652352] [2019-11-20 11:11:35,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:11:35,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-20 11:11:35,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792335144] [2019-11-20 11:11:35,043 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-20 11:11:35,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:11:35,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-20 11:11:35,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-20 11:11:35,054 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 5 states. [2019-11-20 11:11:35,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:11:35,247 INFO L93 Difference]: Finished difference Result 67 states and 87 transitions. [2019-11-20 11:11:35,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:11:35,248 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2019-11-20 11:11:35,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:11:35,261 INFO L225 Difference]: With dead ends: 67 [2019-11-20 11:11:35,263 INFO L226 Difference]: Without dead ends: 44 [2019-11-20 11:11:35,268 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-20 11:11:35,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-11-20 11:11:35,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2019-11-20 11:11:35,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-20 11:11:35,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2019-11-20 11:11:35,338 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 8 [2019-11-20 11:11:35,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:11:35,339 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2019-11-20 11:11:35,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-20 11:11:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2019-11-20 11:11:35,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-20 11:11:35,346 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:11:35,346 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:11:35,347 INFO L410 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:11:35,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:11:35,348 INFO L82 PathProgramCache]: Analyzing trace with hash -557798522, now seen corresponding path program 1 times [2019-11-20 11:11:35,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:11:35,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328407806] [2019-11-20 11:11:35,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:11:35,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:35,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:11:35,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328407806] [2019-11-20 11:11:35,466 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271059288] [2019-11-20 11:11:35,466 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 [2019-11-20 11:11:35,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:35,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-20 11:11:35,556 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:11:35,629 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:11:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:11:35,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:11:35,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2019-11-20 11:11:35,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434763253] [2019-11-20 11:11:35,654 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:11:35,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-20 11:11:35,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:11:35,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:11:35,655 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 10 states. [2019-11-20 11:11:35,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:11:35,992 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2019-11-20 11:11:35,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-20 11:11:35,993 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2019-11-20 11:11:35,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:11:35,994 INFO L225 Difference]: With dead ends: 44 [2019-11-20 11:11:35,995 INFO L226 Difference]: Without dead ends: 42 [2019-11-20 11:11:35,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:11:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-20 11:11:36,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 17. [2019-11-20 11:11:36,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-20 11:11:36,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2019-11-20 11:11:36,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 14 [2019-11-20 11:11:36,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:11:36,003 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2019-11-20 11:11:36,003 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:11:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2019-11-20 11:11:36,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:11:36,004 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:11:36,004 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:11:36,207 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-20 11:11:36,208 INFO L410 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:11:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:11:36,210 INFO L82 PathProgramCache]: Analyzing trace with hash -152930088, now seen corresponding path program 1 times [2019-11-20 11:11:36,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-20 11:11:36,211 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287459654] [2019-11-20 11:11:36,212 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-20 11:11:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:36,334 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: Undeclared function symbol (const Int) at de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.term(WrapperScript.java:250) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1307) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.SmtUtils.termWithLocalSimplification(SmtUtils.java:1188) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.scripttransfer.TermTransferrer.convertApplicationTerm(TermTransferrer.java:182) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer$BuildApplicationTerm.walk(TermTransformer.java:339) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:115) at de.uni_freiburg.informatik.ultimate.logic.NonRecursive.run(NonRecursive.java:106) at de.uni_freiburg.informatik.ultimate.logic.TermTransformer.transform(TermTransformer.java:272) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computePredicates(NestedInterpolantsBuilder.java:573) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:171) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:300) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:202) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:107) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:79) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleCraig.construct(IpTcStrategyModuleCraig.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:463) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:333) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:171) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:123) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2019-11-20 11:11:36,352 INFO L168 Benchmark]: Toolchain (without parser) took 2399.40 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 944.7 MB in the beginning and 990.6 MB in the end (delta: -45.9 MB). Peak memory consumption was 93.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:11:36,353 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:11:36,354 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. [2019-11-20 11:11:36,355 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.79 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. [2019-11-20 11:11:36,356 INFO L168 Benchmark]: Boogie Preprocessor took 38.38 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. [2019-11-20 11:11:36,357 INFO L168 Benchmark]: RCFGBuilder took 417.34 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: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:11:36,358 INFO L168 Benchmark]: TraceAbstraction took 1613.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 990.6 MB in the end (delta: 116.1 MB). Peak memory consumption was 116.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:11:36,361 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 962.2 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 290.19 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 138.9 MB). Free memory was 944.7 MB in the beginning and 1.1 GB in the end (delta: -185.5 MB). Peak memory consumption was 23.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 35.79 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 38.38 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 417.34 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: 23.5 MB). Peak memory consumption was 23.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 1613.95 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 990.6 MB in the end (delta: 116.1 MB). Peak memory consumption was 116.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: Undeclared function symbol (const Int) de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: Undeclared function symbol (const Int): de.uni_freiburg.informatik.ultimate.logic.NoopScript.term(NoopScript.java:478) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.24-678e011 [2019-11-20 11:11:38,148 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-20 11:11:38,150 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-20 11:11:38,161 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-20 11:11:38,161 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-20 11:11:38,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-20 11:11:38,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-20 11:11:38,166 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-20 11:11:38,168 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-20 11:11:38,169 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-20 11:11:38,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-20 11:11:38,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-20 11:11:38,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-20 11:11:38,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-20 11:11:38,174 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-20 11:11:38,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-20 11:11:38,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-20 11:11:38,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-20 11:11:38,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-20 11:11:38,181 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-20 11:11:38,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-20 11:11:38,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-20 11:11:38,185 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-20 11:11:38,185 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-20 11:11:38,188 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-20 11:11:38,189 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-20 11:11:38,189 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-20 11:11:38,190 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-20 11:11:38,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-20 11:11:38,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-20 11:11:38,192 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-20 11:11:38,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-20 11:11:38,193 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-20 11:11:38,194 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-20 11:11:38,195 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-20 11:11:38,195 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-20 11:11:38,196 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-20 11:11:38,196 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-20 11:11:38,197 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-20 11:11:38,198 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-20 11:11:38,198 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-20 11:11:38,199 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2019-11-20 11:11:38,213 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-20 11:11:38,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-20 11:11:38,214 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-20 11:11:38,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-20 11:11:38,215 INFO L138 SettingsManager]: * Use SBE=true [2019-11-20 11:11:38,215 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-20 11:11:38,215 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-20 11:11:38,216 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-20 11:11:38,216 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-20 11:11:38,216 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-20 11:11:38,216 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-20 11:11:38,217 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-20 11:11:38,217 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2019-11-20 11:11:38,217 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2019-11-20 11:11:38,217 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-20 11:11:38,218 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-20 11:11:38,218 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-20 11:11:38,218 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-20 11:11:38,218 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-20 11:11:38,219 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-20 11:11:38,219 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-20 11:11:38,219 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-20 11:11:38,219 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-20 11:11:38,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-20 11:11:38,220 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-20 11:11:38,220 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-20 11:11:38,220 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2019-11-20 11:11:38,221 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2019-11-20 11:11:38,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-20 11:11:38,221 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-20 11:11:38,221 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 -> 17d20a29a9e9cc6560e9aa0daac36f5de29f992c [2019-11-20 11:11:38,503 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-20 11:11:38,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-20 11:11:38,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-20 11:11:38,516 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-20 11:11:38,516 INFO L275 PluginConnector]: CDTParser initialized [2019-11-20 11:11:38,517 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/../../sv-benchmarks/c/verifythis/elimination_max_rec.c [2019-11-20 11:11:38,564 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/077fa7672/d8a630429a4849aeb573103f6fc454f2/FLAG45a3b494f [2019-11-20 11:11:38,937 INFO L306 CDTParser]: Found 1 translation units. [2019-11-20 11:11:38,937 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/sv-benchmarks/c/verifythis/elimination_max_rec.c [2019-11-20 11:11:38,943 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/077fa7672/d8a630429a4849aeb573103f6fc454f2/FLAG45a3b494f [2019-11-20 11:11:38,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/data/077fa7672/d8a630429a4849aeb573103f6fc454f2 [2019-11-20 11:11:38,957 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-20 11:11:38,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2019-11-20 11:11:38,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-20 11:11:38,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-20 11:11:38,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-20 11:11:38,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:38" (1/1) ... [2019-11-20 11:11:38,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1440216e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:38, skipping insertion in model container [2019-11-20 11:11:38,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:11:38" (1/1) ... [2019-11-20 11:11:38,972 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-20 11:11:38,987 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-20 11:11:39,180 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:11:39,200 INFO L188 MainTranslator]: Completed pre-run [2019-11-20 11:11:39,219 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-20 11:11:39,234 INFO L192 MainTranslator]: Completed translation [2019-11-20 11:11:39,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39 WrapperNode [2019-11-20 11:11:39,235 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-20 11:11:39,236 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-20 11:11:39,236 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-20 11:11:39,236 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-20 11:11:39,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,330 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,351 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-20 11:11:39,351 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-20 11:11:39,352 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-20 11:11:39,352 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-20 11:11:39,361 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,380 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,382 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,383 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... [2019-11-20 11:11:39,386 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-20 11:11:39,386 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-20 11:11:39,387 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-20 11:11:39,387 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-20 11:11:39,392 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/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 [2019-11-20 11:11:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure check [2019-11-20 11:11:39,436 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2019-11-20 11:11:39,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-20 11:11:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2019-11-20 11:11:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-20 11:11:39,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-20 11:11:39,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-20 11:11:39,713 INFO L280 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-20 11:11:39,713 INFO L285 CfgBuilder]: Removed 10 assume(true) statements. [2019-11-20 11:11:39,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:39 BoogieIcfgContainer [2019-11-20 11:11:39,714 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-20 11:11:39,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-20 11:11:39,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-20 11:11:39,718 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-20 11:11:39,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:11:38" (1/3) ... [2019-11-20 11:11:39,719 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659dad96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:39, skipping insertion in model container [2019-11-20 11:11:39,719 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:11:39" (2/3) ... [2019-11-20 11:11:39,720 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@659dad96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:11:39, skipping insertion in model container [2019-11-20 11:11:39,720 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:39" (3/3) ... [2019-11-20 11:11:39,721 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec.c [2019-11-20 11:11:39,730 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-20 11:11:39,736 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2019-11-20 11:11:39,746 INFO L249 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2019-11-20 11:11:39,767 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-20 11:11:39,768 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-20 11:11:39,768 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-20 11:11:39,768 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-20 11:11:39,768 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-20 11:11:39,768 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-20 11:11:39,768 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-20 11:11:39,769 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-20 11:11:39,784 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-20 11:11:39,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-20 11:11:39,789 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:11:39,790 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:11:39,791 INFO L410 AbstractCegarLoop]: === Iteration 1 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:11:39,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:11:39,796 INFO L82 PathProgramCache]: Analyzing trace with hash 121169294, now seen corresponding path program 1 times [2019-11-20 11:11:39,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:11:39,807 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1227704578] [2019-11-20 11:11:39,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:11:39,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:39,956 INFO L255 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-20 11:11:39,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:11:40,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:11:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:11:40,135 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:11:40,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:11:40,349 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227704578] [2019-11-20 11:11:40,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:11:40,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 10 [2019-11-20 11:11:40,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682887932] [2019-11-20 11:11:40,358 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-20 11:11:40,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:11:40,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-20 11:11:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2019-11-20 11:11:40,373 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 10 states. [2019-11-20 11:11:41,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:11:41,615 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2019-11-20 11:11:41,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-20 11:11:41,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 8 [2019-11-20 11:11:41,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:11:41,631 INFO L225 Difference]: With dead ends: 74 [2019-11-20 11:11:41,631 INFO L226 Difference]: Without dead ends: 46 [2019-11-20 11:11:41,640 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2019-11-20 11:11:41,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-11-20 11:11:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 38. [2019-11-20 11:11:41,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-20 11:11:41,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-11-20 11:11:41,712 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 8 [2019-11-20 11:11:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:11:41,712 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-11-20 11:11:41,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-20 11:11:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-11-20 11:11:41,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-20 11:11:41,714 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:11:41,714 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-20 11:11:41,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:11:41,920 INFO L410 AbstractCegarLoop]: === Iteration 2 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:11:41,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:11:41,921 INFO L82 PathProgramCache]: Analyzing trace with hash -152930088, now seen corresponding path program 1 times [2019-11-20 11:11:41,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:11:41,922 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [760347113] [2019-11-20 11:11:41,922 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:11:42,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:11:42,022 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-20 11:11:42,024 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:11:42,057 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2019-11-20 11:11:42,058 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:11:42,065 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:11:42,066 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:11:42,066 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2019-11-20 11:11:44,122 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 (_ BitVec 32))) (= ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2019-11-20 11:11:44,148 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:11:44,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2019-11-20 11:11:44,174 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:16,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:16,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [760347113] [2019-11-20 11:12:16,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:12:16,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-20 11:12:16,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155591640] [2019-11-20 11:12:16,566 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-20 11:12:16,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:16,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-20 11:12:16,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=91, Unknown=17, NotChecked=20, Total=156 [2019-11-20 11:12:16,568 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 13 states. [2019-11-20 11:12:20,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:20,878 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2019-11-20 11:12:20,879 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-20 11:12:20,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2019-11-20 11:12:20,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:20,880 INFO L225 Difference]: With dead ends: 42 [2019-11-20 11:12:20,881 INFO L226 Difference]: Without dead ends: 24 [2019-11-20 11:12:20,882 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=58, Invalid=167, Unknown=19, NotChecked=28, Total=272 [2019-11-20 11:12:20,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-20 11:12:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-20 11:12:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-20 11:12:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-20 11:12:20,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 17 [2019-11-20 11:12:20,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:20,889 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-20 11:12:20,889 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-20 11:12:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-20 11:12:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 11:12:20,890 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:20,890 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:21,092 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:21,093 INFO L410 AbstractCegarLoop]: === Iteration 3 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:12:21,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:21,093 INFO L82 PathProgramCache]: Analyzing trace with hash 531240830, now seen corresponding path program 1 times [2019-11-20 11:12:21,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:21,094 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1022310304] [2019-11-20 11:12:21,094 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:21,250 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-20 11:12:21,252 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:21,729 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:12:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:21,768 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:12:22,039 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-20 11:12:22,227 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-20 11:12:22,228 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1022310304] [2019-11-20 11:12:22,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-20 11:12:22,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 20 [2019-11-20 11:12:22,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778817410] [2019-11-20 11:12:22,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-20 11:12:22,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:12:22,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-20 11:12:22,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2019-11-20 11:12:22,230 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 20 states. [2019-11-20 11:12:23,983 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2019-11-20 11:12:25,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:12:25,062 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-11-20 11:12:25,064 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-20 11:12:25,064 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2019-11-20 11:12:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:12:25,065 INFO L225 Difference]: With dead ends: 45 [2019-11-20 11:12:25,065 INFO L226 Difference]: Without dead ends: 43 [2019-11-20 11:12:25,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=412, Invalid=1228, Unknown=0, NotChecked=0, Total=1640 [2019-11-20 11:12:25,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-20 11:12:25,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2019-11-20 11:12:25,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-20 11:12:25,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-20 11:12:25,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 20 [2019-11-20 11:12:25,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:12:25,074 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-20 11:12:25,074 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-20 11:12:25,074 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-20 11:12:25,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-20 11:12:25,075 INFO L402 BasicCegarLoop]: Found error trace [2019-11-20 11:12:25,075 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2019-11-20 11:12:25,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:25,277 INFO L410 AbstractCegarLoop]: === Iteration 4 === [checkErr1ASSERT_VIOLATIONERROR_FUNCTION, checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-20 11:12:25,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-20 11:12:25,278 INFO L82 PathProgramCache]: Analyzing trace with hash 846664570, now seen corresponding path program 1 times [2019-11-20 11:12:25,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy WOLF [2019-11-20 11:12:25,278 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleCvc4 [1835532869] [2019-11-20 11:12:25,278 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:12:25,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-20 11:12:25,398 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-20 11:12:25,399 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-20 11:12:25,403 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2019-11-20 11:12:25,403 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:25,405 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:25,405 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-20 11:12:25,405 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2019-11-20 11:12:25,438 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2019-11-20 11:12:25,438 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-20 11:12:25,442 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-20 11:12:25,443 INFO L496 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2019-11-20 11:12:25,443 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2019-11-20 11:12:25,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 11:12:25,473 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-20 11:13:03,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-20 11:13:03,817 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1835532869] [2019-11-20 11:13:03,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-11-20 11:13:03,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 12 [2019-11-20 11:13:03,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872360715] [2019-11-20 11:13:03,817 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-20 11:13:03,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2019-11-20 11:13:03,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-20 11:13:03,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=87, Unknown=19, NotChecked=0, Total=132 [2019-11-20 11:13:03,818 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 12 states. [2019-11-20 11:13:07,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-20 11:13:07,989 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2019-11-20 11:13:07,991 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-20 11:13:07,991 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 20 [2019-11-20 11:13:07,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-20 11:13:07,992 INFO L225 Difference]: With dead ends: 39 [2019-11-20 11:13:07,992 INFO L226 Difference]: Without dead ends: 0 [2019-11-20 11:13:07,992 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=47, Invalid=142, Unknown=21, NotChecked=0, Total=210 [2019-11-20 11:13:07,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-11-20 11:13:07,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-11-20 11:13:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-11-20 11:13:07,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-11-20 11:13:07,994 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 20 [2019-11-20 11:13:07,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-20 11:13:07,994 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-11-20 11:13:07,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-20 11:13:07,994 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-11-20 11:13:07,994 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-11-20 11:13:08,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 cvc4 --incremental --print-success --lang smt --rewrite-divk [2019-11-20 11:13:08,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-11-20 11:13:09,255 WARN L191 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2019-11-20 11:13:09,364 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-11-20 11:13:09,364 INFO L444 ceAbstractionStarter]: For program point L-1(line -1) no Hoare annotation was computed. [2019-11-20 11:13:09,364 INFO L444 ceAbstractionStarter]: For program point L-1-1(line -1) no Hoare annotation was computed. [2019-11-20 11:13:09,364 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2019-11-20 11:13:09,364 INFO L444 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-11-20 11:13:09,364 INFO L440 ceAbstractionStarter]: At program point L44(lines 36 45) the Hoare annotation is: (and (bvslt ULTIMATE.start_main_~n~0 (_ bv1073741824 32)) (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32))) [2019-11-20 11:13:09,365 INFO L440 ceAbstractionStarter]: At program point L41(line 41) the Hoare annotation is: (let ((.cse0 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (and (= .cse0 (select |#memory_int| ULTIMATE.start_main_~a~0.base)) (bvslt ULTIMATE.start_main_~n~0 (_ bv1073741824 32)) (bvsge ULTIMATE.start_main_~n~0 (_ bv0 32)) (= (select |#memory_int| |ULTIMATE.start_main_#t~malloc11.base|) .cse0))) [2019-11-20 11:13:09,365 INFO L444 ceAbstractionStarter]: For program point L41-1(line 41) no Hoare annotation was computed. [2019-11-20 11:13:09,365 INFO L447 ceAbstractionStarter]: At program point checkENTRY(lines 11 34) the Hoare annotation is: true [2019-11-20 11:13:09,365 INFO L444 ceAbstractionStarter]: For program point checkErr0ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,365 INFO L444 ceAbstractionStarter]: For program point L23(line 23) no Hoare annotation was computed. [2019-11-20 11:13:09,365 INFO L444 ceAbstractionStarter]: For program point checkFINAL(lines 11 34) no Hoare annotation was computed. [2019-11-20 11:13:09,365 INFO L444 ceAbstractionStarter]: For program point L5(lines 5 7) no Hoare annotation was computed. [2019-11-20 11:13:09,366 INFO L444 ceAbstractionStarter]: For program point L5-1(lines 5 7) no Hoare annotation was computed. [2019-11-20 11:13:09,366 INFO L444 ceAbstractionStarter]: For program point checkErr1ASSERT_VIOLATIONERROR_FUNCTION(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,366 INFO L444 ceAbstractionStarter]: For program point L20(lines 20 21) no Hoare annotation was computed. [2019-11-20 11:13:09,366 INFO L444 ceAbstractionStarter]: For program point checkEXIT(lines 11 34) no Hoare annotation was computed. [2019-11-20 11:13:09,368 INFO L440 ceAbstractionStarter]: At program point L20-2(lines 20 21) the Hoare annotation is: (let ((.cse8 ((as const (Array (_ BitVec 32) (_ BitVec 32))) (_ bv0 32)))) (let ((.cse0 (= (bvadd check_~n (_ bv4294967295 32)) check_~y)) (.cse1 (bvslt check_~n (_ bv1073741824 32))) (.cse2 (= (bvadd check___VERIFIER_assert_~cond (_ bv4294967295 32)) (_ bv0 32))) (.cse4 (not (= .cse8 (select |#memory_int| |check_#in~a.base|)))) (.cse5 (not (bvsge |check_#in~n| (_ bv0 32)))) (.cse6 (not (= (bvadd |check_#in~y| (_ bv1 32)) |check_#in~n|))) (.cse7 (not (bvslt |check_#in~n| (_ bv1073741824 32))))) (and (let ((.cse3 (bvadd |check_#in~x| (_ bv4294967295 32)))) (or (and (not (bvsge (_ bv0 32) check_~y)) .cse0 .cse1 (= (_ bv2 32) check_~x) .cse2) (not (= .cse3 (_ bv0 32))) .cse4 (bvsge .cse3 |check_#in~y|) .cse5 .cse6 .cse7)) (or (or (not (bvslt |check_#in~y| |check_#in~n|)) (not (bvsle (_ bv0 32) |check_#in~x|)) (not (bvsle (_ bv0 32) (bvadd |check_#in~x| (_ bv1 32))))) .cse4 (and (= .cse8 (select |#memory_int| check_~a.base)) (bvsle (_ bv0 32) (bvadd check_~x (_ bv1 32))) (bvsle (_ bv0 32) check_~x) (bvslt check_~y check_~n) (not (= check___VERIFIER_assert_~cond (_ bv0 32))))) (or (and (= (_ bv1 32) check_~x) .cse0 .cse1 (not (bvsge (bvadd check_~x (_ bv4294967295 32)) check_~y)) .cse2) (not (= |check_#in~x| (_ bv0 32))) .cse4 .cse5 .cse6 .cse7)))) [2019-11-20 11:13:09,368 INFO L444 ceAbstractionStarter]: For program point L12(line 12) no Hoare annotation was computed. [2019-11-20 11:13:09,368 INFO L444 ceAbstractionStarter]: For program point L6(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,368 INFO L444 ceAbstractionStarter]: For program point L6-1(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,368 INFO L444 ceAbstractionStarter]: For program point L6-3(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,368 INFO L444 ceAbstractionStarter]: For program point L6-4(line 6) no Hoare annotation was computed. [2019-11-20 11:13:09,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 11:13:09 BoogieIcfgContainer [2019-11-20 11:13:09,378 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-11-20 11:13:09,379 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2019-11-20 11:13:09,379 INFO L271 PluginConnector]: Initializing Witness Printer... [2019-11-20 11:13:09,380 INFO L275 PluginConnector]: Witness Printer initialized [2019-11-20 11:13:09,380 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:11:39" (3/4) ... [2019-11-20 11:13:09,382 INFO L137 WitnessPrinter]: Generating witness for correct program [2019-11-20 11:13:09,386 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure check [2019-11-20 11:13:09,392 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2019-11-20 11:13:09,393 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2019-11-20 11:13:09,393 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2019-11-20 11:13:09,438 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_3f23e298-204a-4cbe-9d76-9ac2d5641e70/bin/uautomizer/witness.graphml [2019-11-20 11:13:09,439 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2019-11-20 11:13:09,440 INFO L168 Benchmark]: Toolchain (without parser) took 90481.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 202.4 MB). Free memory was 959.1 MB in the beginning and 979.9 MB in the end (delta: -20.8 MB). Peak memory consumption was 181.5 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,440 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2019-11-20 11:13:09,441 INFO L168 Benchmark]: CACSL2BoogieTranslator took 276.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,442 INFO L168 Benchmark]: Boogie Procedure Inliner took 115.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -200.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,442 INFO L168 Benchmark]: Boogie Preprocessor took 34.65 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,443 INFO L168 Benchmark]: RCFGBuilder took 327.89 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,443 INFO L168 Benchmark]: TraceAbstraction took 89662.55 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 987.2 MB in the end (delta: 129.0 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,444 INFO L168 Benchmark]: Witness Printer took 59.41 ms. Allocated memory is still 1.2 GB. Free memory was 987.2 MB in the beginning and 979.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. [2019-11-20 11:13:09,446 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 1.0 GB. Free memory is still 987.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 276.20 ms. Allocated memory is still 1.0 GB. Free memory was 959.1 MB in the beginning and 947.0 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.1 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 115.74 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 151.5 MB). Free memory was 947.0 MB in the beginning and 1.1 GB in the end (delta: -200.7 MB). Peak memory consumption was 9.9 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 34.65 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * RCFGBuilder took 327.89 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: 24.8 MB). Peak memory consumption was 24.8 MB. Max. memory is 11.5 GB. * TraceAbstraction took 89662.55 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 50.9 MB). Free memory was 1.1 GB in the beginning and 987.2 MB in the end (delta: 129.0 MB). Peak memory consumption was 179.9 MB. Max. memory is 11.5 GB. * Witness Printer took 59.41 ms. Allocated memory is still 1.2 GB. Free memory was 987.2 MB in the beginning and 979.9 MB in the end (delta: 7.3 MB). Peak memory consumption was 7.3 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - PositiveResult [Line: 6]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ~bvslt32(n, 1073741824bv32) && ~bvsge32(n, 0bv32) - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 2 error locations. Result: SAFE, OverallTime: 89.6s, OverallIterations: 4, TraceHistogramMax: 3, AutomataDifference: 12.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.1s, HoareTripleCheckerStatistics: 49 SDtfs, 191 SDslu, 237 SDs, 0 SdLazy, 359 SolverSat, 97 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 162 GetRequests, 74 SyntacticMatches, 4 SemanticMatches, 84 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 85.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=38occurred in iteration=1, 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, 21 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 4 LocationsWithAnnotation, 16 PreInvPairs, 21 NumberOfFragments, 176 HoareAnnotationTreeSize, 16 FomulaSimplifications, 443 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 4 FomulaSimplificationsInter, 943 FormulaSimplificationTreeSizeReductionInter, 0.9s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 74.3s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 122 ConstructedInterpolants, 20 QuantifiedInterpolants, 17626 SizeOfPredicates, 50 NumberOfNonLiveVariables, 274 ConjunctsInSsa, 57 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 28/52 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...