./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-acceleration/phases_2-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-acceleration/phases_2-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 62c8372256c861b4f8257978673ab17e2a1f1b99 .......................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:10:26,213 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:10:26,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:10:26,281 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:10:26,282 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:10:26,291 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:10:26,293 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:10:26,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:10:26,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:10:26,299 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:10:26,301 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:10:26,302 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:10:26,303 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:10:26,304 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:10:26,306 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:10:26,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:10:26,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:10:26,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:10:26,314 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:10:26,317 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:10:26,319 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:10:26,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:10:26,322 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:10:26,323 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:10:26,327 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:10:26,328 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:10:26,328 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:10:26,329 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:10:26,330 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:10:26,331 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:10:26,332 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:10:26,333 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:10:26,334 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:10:26,335 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:10:26,337 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:10:26,337 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:10:26,338 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:10:26,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:10:26,339 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:10:26,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:10:26,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:10:26,342 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-30 01:10:26,369 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:10:26,369 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:10:26,371 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:10:26,371 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:10:26,372 INFO L138 SettingsManager]: * Use SBE=true [2020-11-30 01:10:26,372 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:10:26,373 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:10:26,373 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:10:26,373 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:10:26,374 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:10:26,374 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-30 01:10:26,374 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:10:26,378 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-30 01:10:26,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:10:26,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-30 01:10:26,383 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:10:26,383 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-30 01:10:26,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:10:26,384 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 01:10:26,384 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:10:26,384 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:10:26,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:26,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:10:26,385 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:10:26,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-30 01:10:26,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-30 01:10:26,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:10:26,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-30 01:10:26,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:10:26,388 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62c8372256c861b4f8257978673ab17e2a1f1b99 [2020-11-30 01:10:26,686 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:10:26,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:10:26,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:10:26,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:10:26,737 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:10:26,738 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/../../sv-benchmarks/c/loop-acceleration/phases_2-1.c [2020-11-30 01:10:26,810 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/data/b0ef583c4/8f783a3ddaec4f5eb1ea3f0649bd0d64/FLAG2e3f8c9d6 [2020-11-30 01:10:27,274 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:10:27,274 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/sv-benchmarks/c/loop-acceleration/phases_2-1.c [2020-11-30 01:10:27,282 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/data/b0ef583c4/8f783a3ddaec4f5eb1ea3f0649bd0d64/FLAG2e3f8c9d6 [2020-11-30 01:10:27,644 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/data/b0ef583c4/8f783a3ddaec4f5eb1ea3f0649bd0d64 [2020-11-30 01:10:27,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:10:27,647 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:10:27,651 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:27,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:10:27,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:10:27,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,658 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29a5b44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27, skipping insertion in model container [2020-11-30 01:10:27,658 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,673 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:10:27,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:10:27,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:27,849 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:10:27,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:10:27,882 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:10:27,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27 WrapperNode [2020-11-30 01:10:27,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:10:27,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:27,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:10:27,885 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:10:27,891 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,898 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,915 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:10:27,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:10:27,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:10:27,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:10:27,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,930 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,935 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... [2020-11-30 01:10:27,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:10:27,939 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:10:27,939 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:10:27,939 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:10:27,941 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:10:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 01:10:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:10:28,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:10:28,004 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:10:28,217 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:10:28,217 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 01:10:28,218 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28 BoogieIcfgContainer [2020-11-30 01:10:28,219 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:10:28,220 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:10:28,221 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:10:28,227 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:10:28,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:10:27" (1/3) ... [2020-11-30 01:10:28,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101caaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:10:27" (2/3) ... [2020-11-30 01:10:28,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@101caaf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:10:28, skipping insertion in model container [2020-11-30 01:10:28,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28" (3/3) ... [2020-11-30 01:10:28,235 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-11-30 01:10:28,244 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:10:28,248 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-30 01:10:28,260 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-30 01:10:28,285 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:10:28,285 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-30 01:10:28,285 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:10:28,285 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:10:28,285 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:10:28,285 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:10:28,286 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:10:28,286 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:10:28,299 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2020-11-30 01:10:28,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:10:28,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:28,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:28,305 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1807274184, now seen corresponding path program 1 times [2020-11-30 01:10:28,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:28,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455229749] [2020-11-30 01:10:28,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:28,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:10:28,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:10:28,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455229749] [2020-11-30 01:10:28,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:10:28,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:10:28,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074477838] [2020-11-30 01:10:28,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 01:10:28,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-30 01:10:28,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 01:10:28,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:28,577 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2020-11-30 01:10:28,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:10:28,594 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2020-11-30 01:10:28,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 01:10:28,595 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-30 01:10:28,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:10:28,604 INFO L225 Difference]: With dead ends: 20 [2020-11-30 01:10:28,604 INFO L226 Difference]: Without dead ends: 9 [2020-11-30 01:10:28,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 01:10:28,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2020-11-30 01:10:28,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2020-11-30 01:10:28,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2020-11-30 01:10:28,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2020-11-30 01:10:28,656 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 7 [2020-11-30 01:10:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:10:28,657 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2020-11-30 01:10:28,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 01:10:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2020-11-30 01:10:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 01:10:28,658 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:10:28,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:10:28,659 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:10:28,659 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-30 01:10:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:10:28,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1806976274, now seen corresponding path program 1 times [2020-11-30 01:10:28,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-30 01:10:28,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770584526] [2020-11-30 01:10:28,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:10:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:10:28,729 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:10:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 01:10:28,751 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 01:10:28,771 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-30 01:10:28,771 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 01:10:28,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:10:28,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 01:10:28 BoogieIcfgContainer [2020-11-30 01:10:28,792 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 01:10:28,793 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 01:10:28,793 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 01:10:28,793 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 01:10:28,794 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:10:28" (3/4) ... [2020-11-30 01:10:28,796 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-30 01:10:28,832 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_ecefd0f7-78a9-437c-b205-464cfde67c07/bin/uautomizer/witness.graphml [2020-11-30 01:10:28,833 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 01:10:28,835 INFO L168 Benchmark]: Toolchain (without parser) took 1186.63 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 62.1 MB in the beginning and 88.7 MB in the end (delta: -26.6 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:28,836 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 49.1 MB in the beginning and 49.1 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:28,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.88 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 69.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:28,838 INFO L168 Benchmark]: Boogie Procedure Inliner took 31.17 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 67.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:28,838 INFO L168 Benchmark]: Boogie Preprocessor took 21.37 ms. Allocated memory is still 92.3 MB. Free memory was 67.7 MB in the beginning and 66.8 MB in the end (delta: 940.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:28,839 INFO L168 Benchmark]: RCFGBuilder took 279.80 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 55.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:28,840 INFO L168 Benchmark]: TraceAbstraction took 571.89 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 55.5 MB in the beginning and 90.2 MB in the end (delta: -34.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 01:10:28,841 INFO L168 Benchmark]: Witness Printer took 39.85 ms. Allocated memory is still 121.6 MB. Free memory was 90.2 MB in the beginning and 88.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 01:10:28,845 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 92.3 MB. Free memory was 49.1 MB in the beginning and 49.1 MB in the end (delta: 39.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.88 ms. Allocated memory is still 92.3 MB. Free memory was 61.9 MB in the beginning and 69.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 31.17 ms. Allocated memory is still 92.3 MB. Free memory was 69.2 MB in the beginning and 67.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.37 ms. Allocated memory is still 92.3 MB. Free memory was 67.7 MB in the beginning and 66.8 MB in the end (delta: 940.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 279.80 ms. Allocated memory is still 92.3 MB. Free memory was 66.8 MB in the beginning and 55.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 571.89 ms. Allocated memory was 92.3 MB in the beginning and 121.6 MB in the end (delta: 29.4 MB). Free memory was 55.5 MB in the beginning and 90.2 MB in the end (delta: -34.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 39.85 ms. Allocated memory is still 121.6 MB. Free memory was 90.2 MB in the beginning and 88.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L18] unsigned int x = 1; [L19] unsigned int y = __VERIFIER_nondet_uint(); [L21] COND FALSE !(!(y > 0)) [L23] COND FALSE !(x < y) [L11] COND TRUE !(cond) [L3] __assert_fail("0", "phases_2-1.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 13 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.4s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 14 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=13occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 36 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...